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Li Y, Hoch G. The sensitivity of root water uptake to cold root temperature follows species-specific upper elevational distribution limits of temperate tree species. PLANT, CELL & ENVIRONMENT 2024; 47:2192-2205. [PMID: 38481108 DOI: 10.1111/pce.14874] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/16/2023] [Revised: 02/21/2024] [Accepted: 02/24/2024] [Indexed: 04/30/2024]
Abstract
Physiological water stress induced by low root temperatures might contribute to species-specific climatic limits of tree distribution. We investigated the low temperature sensitivity of root water uptake and transport in seedlings of 16 European tree species which reach their natural upper elevation distribution limits at different distances to the alpine treeline. We used 2H-H2O pulse-labelling to quantify the water uptake and transport velocity from roots to leaves in seedlings exposed to constant 15°C, 7°C or 2°C root temperature, but identical aboveground temperatures between 20°C and 25°C. In all species, low root temperatures reduced the water transport rate, accompanied by reduced stem water potentials and stomatal conductance. At 7°C root temperature, the relative water uptake rates among species correlated positively with the species-specific upper elevation limits, indicating an increasingly higher sensitivity to lower root zone temperatures, the lower a species' natural elevational distribution limit. Conversely, 2°C root temperature severely inhibited water uptake in all species, irrespective of the species' thermal elevational limits. We conclude that low temperature-induced hydraulic constraints contribute to the cold distribution limits of temperate tree species and are a potential physiological cause behind the low temperature limits of plant growth in general.
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Affiliation(s)
- Yating Li
- Department of Environmental Sciences-Botany, University of Basel, Basel, Switzerland
| | - Günter Hoch
- Department of Environmental Sciences-Botany, University of Basel, Basel, Switzerland
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2
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Zhang Y, Zhang W, Liu Y, Zheng Y, Nie X, Wu Q, Yu W, Wang Y, Wang X, Fang K, Qin L, Xing Y. GWAS identifies two important genes involved in Chinese chestnut weight and leaf length regulation. PLANT PHYSIOLOGY 2024; 194:2387-2399. [PMID: 38114094 DOI: 10.1093/plphys/kiad674] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/12/2023] [Revised: 11/20/2023] [Accepted: 11/21/2023] [Indexed: 12/21/2023]
Abstract
There are many factors that affect the yield of Chinese chestnut (Castanea mollissima), with single nut weight (SNW) being one of the most important. Leaf length is also related to Chinese chestnut yield. However, the genetic architecture and gene function associated with Chinese chestnut nut yield have not been fully explored. In this study, we performed genotyping by sequencing 151 Chinese chestnut cultivars, followed by a genome-wide association study (GWAS) on six horticultural traits. First, we analyzed the phylogeny of the Chinese chestnut and found that the Chinese chestnut cultivars divided into two ecotypes, a northern and southern cultivar group. Differences between the cultivated populations were found in the pathways of plant growth and adaptation to the environment. In the selected regions, we also found interesting tandemly arrayed genes that may influence Chinese chestnut traits and environmental adaptability. To further investigate which horticultural traits were selected, we performed a GWAS using six horticultural traits from 151 cultivars. Forty-five loci that strongly associated with horticultural traits were identified, and six genes highly associated with these traits were screened. In addition, a candidate gene associated with SNW, APETALA2 (CmAP2), and another candidate gene associated with leaf length (LL), CRYPTOCHROME INTERACTING BASIC HELIX-LOOP-HELIX 1 (CmCIB1), were verified in Chinese chestnut and Arabidopsis (Arabidopsis thaliana). Our results showed that CmAP2 affected SNW by negatively regulating cell size. CmCIB1 regulated the elongation of new shoots and leaves by inducing cell elongation, potentially affecting photosynthesis. This study provided valuable information and insights for Chinese chestnut breeding research.
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Affiliation(s)
- Yu Zhang
- Beijing Key Laboratory for Agricultural Application and New Technique, College of Plant Science and Technology, Beijing University of Agriculture, Beijing 102206, China
| | - Weiwei Zhang
- Beijing Key Laboratory for Agricultural Application and New Technique, College of Plant Science and Technology, Beijing University of Agriculture, Beijing 102206, China
| | - Yang Liu
- Beijing Key Laboratory for Agricultural Application and New Technique, College of Plant Science and Technology, Beijing University of Agriculture, Beijing 102206, China
| | - Yi Zheng
- Beijing Key Laboratory for Agricultural Application and New Technique, College of Plant Science and Technology, Beijing University of Agriculture, Beijing 102206, China
- Bioinformatics Center, Beijing University of Agriculture, Beijing 102206, China
| | - Xinghua Nie
- Beijing Key Laboratory for Agricultural Application and New Technique, College of Plant Science and Technology, Beijing University of Agriculture, Beijing 102206, China
| | - Qinyi Wu
- Beijing Key Laboratory for Agricultural Application and New Technique, College of Plant Science and Technology, Beijing University of Agriculture, Beijing 102206, China
| | - Wenjie Yu
- Beijing Key Laboratory for Agricultural Application and New Technique, College of Plant Science and Technology, Beijing University of Agriculture, Beijing 102206, China
| | - Yafeng Wang
- Beijing Key Laboratory for Agricultural Application and New Technique, College of Plant Science and Technology, Beijing University of Agriculture, Beijing 102206, China
| | - Xuefeng Wang
- Longtan Forestry Station, Liyang Bureau of Natural Resources and Planning, Liyang, Jiangsu 213300, China
| | - Kefeng Fang
- College of Landscape Architecture, Beijing University of Agriculture, Beijing 102206, China
| | - Ling Qin
- Beijing Key Laboratory for Agricultural Application and New Technique, College of Plant Science and Technology, Beijing University of Agriculture, Beijing 102206, China
| | - Yu Xing
- Beijing Key Laboratory for Agricultural Application and New Technique, College of Plant Science and Technology, Beijing University of Agriculture, Beijing 102206, China
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Charrier G, Améglio T. Dynamic modeling of stem water content during the dormant period in walnut trees. TREE PHYSIOLOGY 2024; 44:tpad128. [PMID: 37847599 DOI: 10.1093/treephys/tpad128] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/03/2023] [Revised: 09/27/2023] [Accepted: 10/11/2023] [Indexed: 10/19/2023]
Abstract
Water content (WC) is a key variable in plant physiology even during the winter period. To simulate stem WC during the dormant season, a series of experiments were carried out on walnut trees under controlled conditions. In the field, WC was significantly correlated with soil temperature at 50 cm depth (R2 = 0.526). In the greenhouse, WC remained low as long as soil temperature was kept cold (<+5 °C) and increased after the soil temperature was warmed to +15 °C regardless of the date. Stem dehydration rate was significantly influenced by the WC and evaporative demand. A parsimonious model with functions describing the main experimental results was calibrated and validated with field data from 13 independent winter dynamics in Juglans regia L. orchards. Three functions of water uptake were tested, and these gave equivalent accuracies (root-mean-square error (RMSE) = 0.127-8; predictive root-mean-square error = 0.116). However, only a sigmoid function describing the relationship between the root water uptake and soil temperature gave values in agreement with the experimental results. Finally, the simulated WC provided a similar accuracy in predicting frost hardiness compared with the measured WC (RMSE ca 3 °C) and was excellent in spring (RMSE ca 2 °C). This model may be a relevant tool for predicting the risk of spring frost in walnut trees. Its genericity should be tested in other fruit and forest tree species.
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Affiliation(s)
- Guillaume Charrier
- Université Clermont Auvergne, INRAE, PIAF, Clermont-Ferrand F-63000, France
| | - Thierry Améglio
- Université Clermont Auvergne, INRAE, PIAF, Clermont-Ferrand F-63000, France
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Fouché M, Bonnet H, Bonnet DMV, Wenden B. Transport capacity is uncoupled with endodormancy breaking in sweet cherry buds: physiological and molecular insights. FRONTIERS IN PLANT SCIENCE 2023; 14:1240642. [PMID: 38752012 PMCID: PMC11094712 DOI: 10.3389/fpls.2023.1240642] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 06/16/2023] [Accepted: 10/25/2023] [Indexed: 05/18/2024]
Abstract
Introduction To avoid the negative impacts of winter unfavorable conditions for plant development, temperate trees enter a rest period called dormancy. Winter dormancy is a complex process that involves multiple signaling pathways and previous studies have suggested that transport capacity between cells and between the buds and the twig may regulate the progression throughout dormancy stages. However, the dynamics and molecular actors involved in this regulation are still poorly described in fruit trees. Methods Here, in order to validate the hypothesis that transport capacity regulates dormancy progression in fruit trees, we combined physiological, imaging and transcriptomic approaches to characterize molecular pathways and transport capacity during dormancy in sweet cherry (Prunus avium L.) flower buds. Results Our results show that transport capacity is reduced during dormancy and could be regulated by environmental signals. Moreover, we demonstrate that dormancy release is not synchronized with the transport capacity resumption but occurs when the bud is capable of growth under the influence of warmer temperatures. We highlight key genes involved in transport capacity during dormancy. Discussion Based on long-term observations conducted during six winter seasons, we propose hypotheses on the environmental and molecular regulation of transport capacity, in relation to dormancy and growth resumption in sweet cherry.
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Affiliation(s)
- Mathieu Fouché
- INRAE, Univ. Bordeaux, UMR Biologie du Fruit et Pathologie 1332, Villenave d’Ornon, France
| | | | | | - Bénédicte Wenden
- INRAE, Univ. Bordeaux, UMR Biologie du Fruit et Pathologie 1332, Villenave d’Ornon, France
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Ojosnegros S, Alvarez JM, Grossmann J, Gagliardini V, Quintanilla LG, Grossniklaus U, Fernández H. Proteome and Interactome Linked to Metabolism, Genetic Information Processing, and Abiotic Stress in Gametophytes of Two Woodferns. Int J Mol Sci 2023; 24:12429. [PMID: 37569809 PMCID: PMC10419320 DOI: 10.3390/ijms241512429] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/23/2023] [Revised: 07/27/2023] [Accepted: 07/31/2023] [Indexed: 08/13/2023] Open
Abstract
Ferns and lycophytes have received scant molecular attention in comparison to angiosperms. The advent of high-throughput technologies allowed an advance towards a greater knowledge of their elusive genomes. In this work, proteomic analyses of heart-shaped gametophytes of two ferns were performed: the apomictic Dryopteris affinis ssp. affinis and its sexual relative Dryopteris oreades. In total, a set of 218 proteins shared by these two gametophytes were analyzed using the STRING database, and their proteome associated with metabolism, genetic information processing, and responses to abiotic stress is discussed. Specifically, we report proteins involved in the metabolism of carbohydrates, lipids, and nucleotides, the biosynthesis of amino acids and secondary compounds, energy, oxide-reduction, transcription, translation, protein folding, sorting and degradation, and responses to abiotic stresses. The interactome of this set of proteins represents a total network composed of 218 nodes and 1792 interactions, obtained mostly from databases and text mining. The interactions among the identified proteins of the ferns D. affinis and D. oreades, together with the description of their biological functions, might contribute to a better understanding of the function and development of ferns as well as fill knowledge gaps in plant evolution.
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Affiliation(s)
- Sara Ojosnegros
- Area of Plant Physiology, Department of Organisms and Systems Biology, University of Oviedo, 33071 Oviedo, Spain; (S.O.); (J.M.A.)
| | - José Manuel Alvarez
- Area of Plant Physiology, Department of Organisms and Systems Biology, University of Oviedo, 33071 Oviedo, Spain; (S.O.); (J.M.A.)
| | - Jonas Grossmann
- Functional Genomic Center Zurich, University and ETH Zurich, 8092 Zurich, Switzerland;
- Swiss Institute of Bioinformatics, 1015 Lausanne, Switzerland
| | - Valeria Gagliardini
- Department of Plant and Microbial Biology & Zurich-Basel Plant Science Center, University of Zurich, 8008 Zurich, Switzerland; (V.G.); (U.G.)
| | - Luis G. Quintanilla
- Department of Biology and Geology, Physics and Inorganic Chemistry, University Rey Juan Carlos, 28933 Móstoles, Spain;
| | - Ueli Grossniklaus
- Department of Plant and Microbial Biology & Zurich-Basel Plant Science Center, University of Zurich, 8008 Zurich, Switzerland; (V.G.); (U.G.)
| | - Helena Fernández
- Area of Plant Physiology, Department of Organisms and Systems Biology, University of Oviedo, 33071 Oviedo, Spain; (S.O.); (J.M.A.)
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Yan M, Zhang C, Li H, Zhang L, Ren Y, Chen Y, Cai H, Zhang S. Root pruning improves maize water-use efficiency by root water absorption. FRONTIERS IN PLANT SCIENCE 2023; 13:1023088. [PMID: 36684736 PMCID: PMC9845614 DOI: 10.3389/fpls.2022.1023088] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 08/19/2022] [Accepted: 11/21/2022] [Indexed: 06/17/2023]
Abstract
Root systems are an important component of plants that impact crop water-use efficiency (WUE) and yield. This study examined the effects of root pruning on maize yield, WUE, and water uptake under pot and hydroponic conditions. The pot experiment showed that root pruning significantly decreased root/shoot ratio. Both small root pruning (cut off about 1/5 of the root system, RP1) and large root pruning (cut off about 1/3 of the root system, RP2) improved WUE and root hydraulic conductivity (Lpr) in the residual root system. Compared with that in the un-cut control, at the jointing stage, RP1 and RP2 increased Lpr by 43.9% and 31.5% under well-watered conditions and 27.4% and 19.8% under drought stress, respectively. RP1 increased grain yield by 12.9% compared with that in the control under well-watered conditions, whereas both pruning treatments did not exhibit a significant effect on yield under drought stress. The hydroponic experiment demonstrated that root pruning did not reduce leaf water potential but increased residual root hydraulic conductivity by 26.2% at 48 h after root pruning under well-watered conditions. The foregoing responses may be explained by the upregulation of plasma membrane intrinsic protein gene and increases in abscisic acid and jasmonic acid in roots. Increased auxin and salicylic acid contributed to the compensated lateral root growth. In conclusion, root pruning improved WUE in maize by root water uptake.
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Affiliation(s)
- Minfei Yan
- State Key Laboratory of Soil Erosion and Dryland Farming on the Loess Plateau, Northwest Agriculture and Forestry University, Yangling, Shaanxi, China
- College of Forestry, Northwest Agriculture and Forestry University, Yangling, Shaanxi, China
| | - Cong Zhang
- State Key Laboratory of Soil Erosion and Dryland Farming on the Loess Plateau, Northwest Agriculture and Forestry University, Yangling, Shaanxi, China
- College of Forestry, Northwest Agriculture and Forestry University, Yangling, Shaanxi, China
| | - Hongbing Li
- State Key Laboratory of Soil Erosion and Dryland Farming on the Loess Plateau, Northwest Agriculture and Forestry University, Yangling, Shaanxi, China
| | - Li Zhang
- School of Pharmacy, Weifang Medical University, Weifang, China
| | - Yuanyuan Ren
- Geography and Environmental Engineering Department, Baoji University of Arts and Sciences, Baoji, China
| | - Yinglong Chen
- State Key Laboratory of Soil Erosion and Dryland Farming on the Loess Plateau, Northwest Agriculture and Forestry University, Yangling, Shaanxi, China
- The University of Western Australia Institute of Agriculture, and University of Western Australia School of Agriculture and Environment, The University of Western Australia, Perth, WA, Australia
| | - Huanjie Cai
- Key Laboratory of Agricultural Soil and Water Engineering in Arid and Semiarid Areas, Ministry of Education, Northwest Agriculture and Forestry University, Yangling, China
| | - Suiqi Zhang
- State Key Laboratory of Soil Erosion and Dryland Farming on the Loess Plateau, Northwest Agriculture and Forestry University, Yangling, Shaanxi, China
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North GB, Brinton EK, Kho TL, Fukui K, Maharaj FDR, Fung A, Ranganath M, Shiina JH. Acid waters in tank bromeliads: Causes and potential consequences. AMERICAN JOURNAL OF BOTANY 2023; 110:e16104. [PMID: 36571428 PMCID: PMC10107723 DOI: 10.1002/ajb2.16104] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 07/05/2022] [Revised: 11/02/2022] [Accepted: 11/03/2022] [Indexed: 06/17/2023]
Abstract
PREMISE The consequences of acidity for plant performance are profound, yet the prevalence and causes of low pH in bromeliad tank water are unknown despite its functional relevance to key members of many neotropical plant communities. METHODS We investigated tank water pH for eight bromeliad species in the field and for the widely occurring Guzmania monostachia in varying light. We compared pH changes over time between plant and artificial tanks containing a solution combined from several plants. Aquaporin transcripts were measured for field plants at two levels of pH. We investigated relationships between pH, leaf hydraulic conductance, and CO2 concentration in greenhouse plants and tested proton pump activity using a stimulator and inhibitor. RESULTS Mean tank water pH for the eight species was 4.7 ± 0.06 and was lower for G. monostachia in higher light. The pH of the solution in artificial tanks, unlike in plants, did not decrease over time. Aquaporin transcription was higher for plants with lower pH, but leaf hydraulic conductance did not differ, suggesting that the pH did not influence water uptake. Tank pH and CO2 concentration were inversely related. Fusicoccin enhanced a decrease in tank pH, whereas orthovanadate did not. CONCLUSIONS Guzmania monostachia acidified its tank water via leaf proton pumps, which appeared responsive to light. Low pH increased aquaporin transcripts but did not influence leaf hydraulic conductance, hence may be more relevant to nutrient uptake.
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Affiliation(s)
| | - Erin K. Brinton
- Department of BiologyOccidental CollegeLos AngelesCA90041USA
| | - Tiffany L. Kho
- Department of BiologyOccidental CollegeLos AngelesCA90041USA
| | - Kyle Fukui
- Department of BiochemistryOccidental CollegeLos AngelesCA90041USA
| | | | - Adriana Fung
- Department of BiologyOccidental CollegeLos AngelesCA90041USA
| | - Mira Ranganath
- Department of BiologyOccidental CollegeLos AngelesCA90041USA
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Goswami AK, Maurya NK, Goswami S, Bardhan K, Singh SK, Prakash J, Pradhan S, Kumar A, Chinnusamy V, Kumar P, Sharma RM, Sharma S, Bisht DS, Kumar C. Physio-biochemical and molecular stress regulators and their crosstalk for low-temperature stress responses in fruit crops: A review. FRONTIERS IN PLANT SCIENCE 2022; 13:1022167. [PMID: 36578327 PMCID: PMC9790972 DOI: 10.3389/fpls.2022.1022167] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 08/18/2022] [Accepted: 11/16/2022] [Indexed: 06/17/2023]
Abstract
Low-temperature stress (LTS) drastically affects vegetative and reproductive growth in fruit crops leading to a gross reduction in the yield and loss in product quality. Among the fruit crops, temperate fruits, during the period of evolution, have developed the mechanism of tolerance, i.e., adaptive capability to chilling and freezing when exposed to LTS. However, tropical and sub-tropical fruit crops are most vulnerable to LTS. As a result, fruit crops respond to LTS by inducing the expression of LTS related genes, which is for climatic acclimatization. The activation of the stress-responsive gene leads to changes in physiological and biochemical mechanisms such as photosynthesis, chlorophyll biosynthesis, respiration, membrane composition changes, alteration in protein synthesis, increased antioxidant activity, altered levels of metabolites, and signaling pathways that enhance their tolerance/resistance and alleviate the damage caused due to LTS and chilling injury. The gene induction mechanism has been investigated extensively in the model crop Arabidopsis and several winter kinds of cereal. The ICE1 (inducer of C-repeat binding factor expression 1) and the CBF (C-repeat binding factor) transcriptional cascade are involved in transcriptional control. The functions of various CBFs and aquaporin genes were well studied in crop plants and their role in multiple stresses including cold stresses is deciphered. In addition, tissue nutrients and plant growth regulators like ABA, ethylene, jasmonic acid etc., also play a significant role in alleviating the LTS and chilling injury in fruit crops. However, these physiological, biochemical and molecular understanding of LTS tolerance/resistance are restricted to few of the temperate and tropical fruit crops. Therefore, a better understanding of cold tolerance's underlying physio-biochemical and molecular components in fruit crops is required under open and simulated LTS. The understanding of LTS tolerance/resistance mechanism will lay the foundation for tailoring the novel fruit genotypes for successful crop production under erratic weather conditions.
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Affiliation(s)
- Amit Kumar Goswami
- Division of Fruits and Horticultural Technology, ICAR-Indian Agricultural Research Institute, New Delhi, India
| | - Naveen Kumar Maurya
- Division of Fruits and Horticultural Technology, ICAR-Indian Agricultural Research Institute, New Delhi, India
| | - Suneha Goswami
- Division of Biochemistry, ICAR-Indian Agricultural Research Institute, New Delhi, India
| | - Kirti Bardhan
- Department of Basic Sciences and Humanities, Navsari Agricultural University, Navsari, India
| | - Sanjay Kumar Singh
- Division of Fruits and Horticultural Technology, ICAR-Indian Agricultural Research Institute, New Delhi, India
| | - Jai Prakash
- Division of Fruits and Horticultural Technology, ICAR-Indian Agricultural Research Institute, New Delhi, India
| | - Satyabrata Pradhan
- Division of Fruits and Horticultural Technology, ICAR-Indian Agricultural Research Institute, New Delhi, India
| | - Amarjeet Kumar
- Multi Testing Technology Centre and Vocational Training Centre, Selesih, Central Agricultural University, Imphal, India
| | - Viswanathan Chinnusamy
- Division of Plant Physiology, ICAR-Indian Agricultural Research Institute, New Delhi, India
| | - Prabhat Kumar
- Department of Agriculture and Farmers Welfare, Ministry of Agriculture & Farmers Welfare, Govt. of India, Krishi Bhavan, New Delhi, India
| | - Radha Mohan Sharma
- Division of Fruits and Horticultural Technology, ICAR-Indian Agricultural Research Institute, New Delhi, India
| | - Stuti Sharma
- Department of Plant Breeding and Genetics, Jawaharlal Nehru Krishi Vishwavidyalaya, Jabalpur, Madhya Pradesh, India
| | | | - Chavlesh Kumar
- Division of Fruits and Horticultural Technology, ICAR-Indian Agricultural Research Institute, New Delhi, India
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Boursiac Y, Pradal C, Bauget F, Lucas M, Delivorias S, Godin C, Maurel C. Phenotyping and modeling of root hydraulic architecture reveal critical determinants of axial water transport. PLANT PHYSIOLOGY 2022; 190:1289-1306. [PMID: 35708646 PMCID: PMC9516777 DOI: 10.1093/plphys/kiac281] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/24/2022] [Accepted: 05/15/2022] [Indexed: 05/26/2023]
Abstract
Water uptake by roots is a key adaptation of plants to aerial life. Water uptake depends on root system architecture (RSA) and tissue hydraulic properties that, together, shape the root hydraulic architecture. This work investigates how the interplay between conductivities along radial (e.g. aquaporins) and axial (e.g. xylem vessels) pathways determines the water transport properties of highly branched RSAs as found in adult Arabidopsis (Arabidopsis thaliana) plants. A hydraulic model named HydroRoot was developed, based on multi-scale tree graph representations of RSAs. Root water flow was measured by the pressure chamber technique after successive cuts of a same root system from the tip toward the base. HydroRoot model inversion in corresponding RSAs allowed us to concomitantly determine radial and axial conductivities, providing evidence that the latter is often overestimated by classical evaluation based on the Hagen-Poiseuille law. Organizing principles of Arabidopsis primary and lateral root growth and branching were determined and used to apply the HydroRoot model to an extended set of simulated RSAs. Sensitivity analyses revealed that water transport can be co-limited by radial and axial conductances throughout the whole RSA. The number of roots that can be sectioned (intercepted) at a given distance from the base was defined as an accessible and informative indicator of RSA. The overall set of experimental and theoretical procedures was applied to plants mutated in ESKIMO1 and previously shown to have xylem collapse. This approach will be instrumental to dissect the root water transport phenotype of plants with intricate alterations in root growth or transport functions.
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Affiliation(s)
| | | | | | | | - Stathis Delivorias
- Institute for Plant Sciences of Montpellier (IPSiM), Univ Montpellier, CNRS, INRAE, Institut Agro, Montpellier 34060, France
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Fleurial K, Vaziriyeganeh M, Zwiazek JJ. Getting cold feet: tree productivity at the mercy of soil temperature. TREE PHYSIOLOGY 2022; 42:1695-1699. [PMID: 35796551 DOI: 10.1093/treephys/tpac077] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/24/2022] [Accepted: 06/06/2022] [Indexed: 06/15/2023]
Affiliation(s)
- Killian Fleurial
- Department of Renewable Resources, University of Alberta, 442 Earth Sciences Building, Edmonton T6G 2E3, Canada
| | - Maryamsadat Vaziriyeganeh
- Department of Renewable Resources, University of Alberta, 442 Earth Sciences Building, Edmonton T6G 2E3, Canada
| | - Janusz J Zwiazek
- Department of Renewable Resources, University of Alberta, 442 Earth Sciences Building, Edmonton T6G 2E3, Canada
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11
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Wang W, Hoch G. Negative effects of low root temperatures on water and carbon relations in temperate tree seedlings assessed by dual isotopic labelling. TREE PHYSIOLOGY 2022; 42:1311-1324. [PMID: 35038338 DOI: 10.1093/treephys/tpac005] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/01/2021] [Accepted: 01/11/2022] [Indexed: 06/14/2023]
Abstract
Low root zone temperatures restrict water and carbon (C) uptake and transport in plants and may contribute to the low temperature limits of tree growth. Here, we quantified the effects of low root temperatures on xylem conductance, photosynthetic C assimilation and phloem C transport in seedlings of four temperate tree species (two broad-leaved and two conifer species) by applying a simultaneous stable isotope labelling of 2H-enriched source water and 13C-enriched atmospheric CO2. Six days before the pulse labelling, the seedlings were transferred to hydroponic tubes and exposed to three different root temperatures (2, 7 and 15 °C), while all seedlings received the same, warm air temperatures (between 18 and 24 °C). Root cooling led to drought-like symptoms with reduced growth, leaf water potentials and stomatal conductance, indicating increasingly adverse conditions for water uptake and transport with decreasing root temperatures. Averaged across all four species, water transport to leaves was reduced by 40% at 7 °C and by 70% at 2 °C root temperature relative to the 15 °C treatment, while photosynthesis was reduced by 20 and 40% at 7 and 2 °C, respectively. The most severe effects were found on the phloem C transport to roots, which was reduced by 60% at 7 °C and almost ceased at 2 °C in comparison with the 15 °C root temperature treatment. This extreme effect on C transport was likely due to a combination of simultaneous reductions of phloem loading, phloem mass flow and root growth. Overall, the dual stable isotope labelling proved to be a useful method to quantify water and C relations in cold-stressed trees and highlighted the potentially important role of hydraulic constraints induced by low soil temperatures as a contributing factor for the climatic distribution limits of temperate tree species.
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Affiliation(s)
- Wenna Wang
- Department of Environmental Sciences - Botany, University of Basel, Schönbeinstrasse 6, Basel 4056, Switzerland
- Key Laboratory of Genetics and Germplasm Innovation of Tropical Special Forest Trees and Ornamental Plants, College of Forestry, Hainan University, Renmin Road 58, Haikou 570228, China
| | - Günter Hoch
- Department of Environmental Sciences - Botany, University of Basel, Schönbeinstrasse 6, Basel 4056, Switzerland
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Guo Z, Ma D, Li J, Wei M, Zhang L, Zhou L, Zhou X, He S, Wang L, Shen Y, Li QQ, Zheng HL. Genome-wide identification and characterization of aquaporins in mangrove plant Kandelia obovata and its role in response to the intertidal environment. PLANT, CELL & ENVIRONMENT 2022; 45:1698-1718. [PMID: 35141923 DOI: 10.1111/pce.14286] [Citation(s) in RCA: 13] [Impact Index Per Article: 6.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/06/2022] [Accepted: 01/30/2022] [Indexed: 05/26/2023]
Abstract
Aquaporins (AQPs) play important roles in plant growth, development and tolerance to environmental stresses. To understand the role of AQPs in the mangrove plant Kandelia obovata, which has the ability to acquire water from seawater, we identified 34 AQPs in the K. obovata genome and analysed their structural features. Phylogenetic analysis revealed that KoAQPs are homologous to AQPs of Populus and Arabidopsis, which are evolutionarily conserved. The key amino acid residues were used to assess water-transport ability. Analysis of cis-acting elements in the promoters indicated that KoAQPs may be stress- and hormone-responsive. Subcellular localization of KoAQPs in yeast showed most KoAQPs function in the membrane system. That transgenic yeast with increased cell volume showed that some KoAQPs have significant water-transport activity, and the substrate sensitivity assay indicates that some KoAQPs can transport H2 O2 . The transcriptome data were used to analyze the expression patterns of KoAQPs in different tissues and developing fruits of K. obovata. In addition, real-time quantitative PCR analyses combined transcriptome data showed that KoAQPs have complex responses to environmental factors, including salinity, flooding and cold. Collectively, the transport of water and solutes by KoAQPs contributed to the adaptation of K. obovata to the coastal intertidal environment.
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Affiliation(s)
- Zejun Guo
- Key Laboratory of the Ministry of Education for Coastal and Wetland Ecosystems, College of the Environment and Ecology, Xiamen University, Xiamen, China
| | - Dongna Ma
- Key Laboratory of the Ministry of Education for Coastal and Wetland Ecosystems, College of the Environment and Ecology, Xiamen University, Xiamen, China
| | - Jing Li
- Key Laboratory of the Ministry of Education for Coastal and Wetland Ecosystems, College of the Environment and Ecology, Xiamen University, Xiamen, China
| | - Mingyue Wei
- Key Laboratory of the Ministry of Education for Coastal and Wetland Ecosystems, College of the Environment and Ecology, Xiamen University, Xiamen, China
| | - Ludan Zhang
- Key Laboratory of the Ministry of Education for Coastal and Wetland Ecosystems, College of the Environment and Ecology, Xiamen University, Xiamen, China
| | - Lichun Zhou
- Key Laboratory of the Ministry of Education for Coastal and Wetland Ecosystems, College of the Environment and Ecology, Xiamen University, Xiamen, China
| | - Xiaoxuan Zhou
- Key Laboratory of the Ministry of Education for Coastal and Wetland Ecosystems, College of the Environment and Ecology, Xiamen University, Xiamen, China
| | - Shanshan He
- Key Laboratory of the Ministry of Education for Coastal and Wetland Ecosystems, College of the Environment and Ecology, Xiamen University, Xiamen, China
| | - Lin Wang
- Key Laboratory of the Ministry of Education for Coastal and Wetland Ecosystems, College of the Environment and Ecology, Xiamen University, Xiamen, China
| | - Yingjia Shen
- Key Laboratory of the Ministry of Education for Coastal and Wetland Ecosystems, College of the Environment and Ecology, Xiamen University, Xiamen, China
| | - Qingshun Quinn Li
- Key Laboratory of the Ministry of Education for Coastal and Wetland Ecosystems, College of the Environment and Ecology, Xiamen University, Xiamen, China
- Graduate College of Biomedical Sciences, Western University of Health Sciences, Pomona, California, USA
| | - Hai-Lei Zheng
- Key Laboratory of the Ministry of Education for Coastal and Wetland Ecosystems, College of the Environment and Ecology, Xiamen University, Xiamen, China
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13
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Salinity Tolerance of Halophytic Grass Puccinellia nuttalliana Is Associated with Enhancement of Aquaporin-Mediated Water Transport by Sodium. Int J Mol Sci 2022; 23:ijms23105732. [PMID: 35628537 PMCID: PMC9145133 DOI: 10.3390/ijms23105732] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/02/2022] [Revised: 05/10/2022] [Accepted: 05/17/2022] [Indexed: 02/05/2023] Open
Abstract
In salt-sensitive plants, root hydraulic conductivity is severely inhibited by NaCl, rapidly leading to the loss of water balance. However, halophytic plants appear to effectively control plant water flow under salinity conditions. In this study, we tested the hypothesis that Na+ is the principal salt factor responsible for the enhancement of aquaporin-mediated water transport in the roots of halophytic grasses, and this enhancement plays a significant role in the maintenance of water balance, gas exchange, and the growth of halophytic plants exposed to salinity. We examined the effects of treatments with 150 mM of NaCl, KCl, and Na2SO4 to separate the factors that affect water relations and, consequently, physiological and growth responses in three related grass species varying in salt tolerance. The grasses included relatively salt-sensitive Poa pratensis, moderately salt-tolerant Poa juncifolia, and the salt-loving halophytic grass Puccinellia nuttalliana. Our study demonstrated that sustained growth, chlorophyll concentrations, gas exchange, and water transport in Puccinellia nuttalliana were associated with the presence of Na in the applied salt treatments. Contrary to the other examined grasses, the root cell hydraulic conductivity in Puccinellia nuttalliana was enhanced by the 150 mM NaCl and 150 mM Na2SO4 treatments. This enhancement was abolished by the 50 µM HgCl2 treatment, demonstrating that Na was the factor responsible for the increase in mercury-sensitive, aquaporin-mediated water transport. The observed increases in root Ca and K concentrations likely played a role in the transcriptional and (or) posttranslational regulation of aquaporins that enhanced root water transport capacity in Puccinellia nuttalliana. The study demonstrates that Na plays a key role in the aquaporin-mediated root water transport of the halophytic grass Puccinellia nuttalliana, contributing to its salinity tolerance.
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14
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Maurel C, Tournaire-Roux C, Verdoucq L, Santoni V. Hormonal and environmental signaling pathways target membrane water transport. PLANT PHYSIOLOGY 2021; 187:2056-2070. [PMID: 35235672 PMCID: PMC8644278 DOI: 10.1093/plphys/kiab373] [Citation(s) in RCA: 12] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/09/2021] [Accepted: 07/13/2021] [Indexed: 05/04/2023]
Abstract
Plant water transport and its molecular components including aquaporins are responsive, across diverse time scales, to an extremely wide array of environmental and hormonal signals. These include water deficit and abscisic acid (ABA) but also more recently identified stimuli such as peptide hormones or bacterial elicitors. The present review makes an inventory of corresponding signalling pathways. It identifies some main principles, such as the central signalling role of ROS, with a dual function of aquaporins in water and hydrogen peroxide transport, the importance of aquaporin phosphorylation that is targeted by multiple classes of protein kinases, and the emerging role of lipid signalling. More studies including systems biology approaches are now needed to comprehend how plant water transport can be adjusted in response to combined stresses.
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Affiliation(s)
- Christophe Maurel
- BPMP, Univ Montpellier, CNRS, INRAE, Institut Agro, Montpellier, France
- Author for Communication:
| | | | - Lionel Verdoucq
- BPMP, Univ Montpellier, CNRS, INRAE, Institut Agro, Montpellier, France
| | - Véronique Santoni
- BPMP, Univ Montpellier, CNRS, INRAE, Institut Agro, Montpellier, France
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15
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Li F, Ni H, Yan W, Xie Y, Liu X, Tan X, Zhang L, Zhang SH. Overexpression of an aquaporin protein from Aspergillus glaucus confers salt tolerance in transgenic soybean. Transgenic Res 2021; 30:727-737. [PMID: 34460070 DOI: 10.1007/s11248-021-00280-9] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/06/2020] [Accepted: 08/18/2021] [Indexed: 10/20/2022]
Abstract
Salt stress is an important abiotic factor that causes severe losses in soybean yield and quality. Therefore, breeding salt-tolerant soybean germplasm resources via genetic engineering has gained importance. Aspergillus glaucus, a halophilic fungus that exhibits significant tolerance to salt, carries the gene AgGlpF. In this study, we used the soybean cotyledonary node transformation method to transfer the AgGlpF gene into the genome of the soybean variety Williams 82 to generate salt-tolerant transgenic soybean varieties. The results of PCR, Southern blot, ddPCR, and RT-PCR indicated that AgGlpF was successfully integrated into the soybean genome and stably expressed. When subjected to salt stress conditions via treatment with 250 mM NaCl for 3 d, the transgenic soybean plants showed significant tolerance compared with wild-type plants, which exhibited withering symptoms and leaf abscission after 9 d. The results of this study indicated that the transfer of AgGlpF into the genome of soybean plants produced transgenic soybean with significantly improved salt stress tolerance.
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Affiliation(s)
- Feiwu Li
- College of Plant Science, Jilin University, No. 5333, Xi'an Str., Lvyuan District, Changchun, 130062, Jilin, People's Republic of China
- Jilin Provincial Key Laboratory of Agricultural Biotechnology, Jilin Academy of Agricultural Sciences, No. 1363, Shengtai Str., Jingyue District, Changchun, 130033, Jilin, People's Republic of China
| | - Hejia Ni
- College of Agriculture, Northeast Agricultural University, Harbin, 150036, People's Republic of China
| | - Wei Yan
- Jilin Provincial Key Laboratory of Agricultural Biotechnology, Jilin Academy of Agricultural Sciences, No. 1363, Shengtai Str., Jingyue District, Changchun, 130033, Jilin, People's Republic of China
| | - Yanbo Xie
- Jilin Provincial Key Laboratory of Agricultural Biotechnology, Jilin Academy of Agricultural Sciences, No. 1363, Shengtai Str., Jingyue District, Changchun, 130033, Jilin, People's Republic of China
| | - Xiaodan Liu
- Institute of Bioengineering, Jilin Agriculture Science and Technology College, Jilin, 132101, Jilin, People's Republic of China
| | - Xichang Tan
- Jilin Provincial Key Laboratory of Agricultural Biotechnology, Jilin Academy of Agricultural Sciences, No. 1363, Shengtai Str., Jingyue District, Changchun, 130033, Jilin, People's Republic of China
| | - Ling Zhang
- Jilin Provincial Key Laboratory of Agricultural Biotechnology, Jilin Academy of Agricultural Sciences, No. 1363, Shengtai Str., Jingyue District, Changchun, 130033, Jilin, People's Republic of China.
| | - Shi-Hong Zhang
- College of Plant Science, Jilin University, No. 5333, Xi'an Str., Lvyuan District, Changchun, 130062, Jilin, People's Republic of China.
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16
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Israel D, Khan S, Warren CR, Zwiazek JJ, Robson TM. The contribution of PIP2-type aquaporins to photosynthetic response to increased vapour pressure deficit. JOURNAL OF EXPERIMENTAL BOTANY 2021; 72:5066-5078. [PMID: 33928350 PMCID: PMC8219038 DOI: 10.1093/jxb/erab187] [Citation(s) in RCA: 11] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 01/29/2021] [Accepted: 04/26/2021] [Indexed: 06/12/2023]
Abstract
The roles of different plasma membrane aquaporins (PIPs) in leaf-level gas exchange of Arabidopsis thaliana were examined using knockout mutants. Since multiple Arabidopsis PIPs are implicated in CO2 transport across cell membranes, we focused on identifying the effects of the knockout mutations on photosynthesis, and whether they are mediated through the control of stomatal conductance of water vapour (gs), mesophyll conductance of CO2 (gm), or both. We grew Arabidopsis plants in low and high humidity environments and found that the contribution of PIPs to gs was larger under low air humidity when the evaporative demand was high, whereas any effect of a lack of PIP function was minimal under higher humidity. The pip2;4 knockout mutant had 44% higher gs than wild-type plants under low humidity, which in turn resulted in an increased net photosynthetic rate (Anet). We also observed a 23% increase in whole-plant transpiration (E) for this knockout mutant. The lack of functional plasma membrane aquaporin AtPIP2;5 did not affect gs or E, but resulted in homeostasis of gm despite changes in humidity, indicating a possible role in regulating CO2 membrane permeability. CO2 transport measurements in yeast expressing AtPIP2;5 confirmed that this aquaporin is indeed permeable to CO2.
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Affiliation(s)
- David Israel
- Organismal and Evolutionary Biology (OEB), Viikki Plant Science Centre (ViPS), University of Helsinki, Finland
| | - Shanjida Khan
- Department of Renewable Resources, University of Alberta, Canada
| | - Charles R Warren
- School of Life and Environmental Sciences, University of Sydney, Australia
| | - Janusz J Zwiazek
- Department of Renewable Resources, University of Alberta, Canada
| | - T Matthew Robson
- Organismal and Evolutionary Biology (OEB), Viikki Plant Science Centre (ViPS), University of Helsinki, Finland
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17
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Vitali V, Sutka M, Ojeda L, Aroca R, Amodeo G. Root hydraulics adjustment is governed by a dominant cell-to-cell pathway in Beta vulgaris seedlings exposed to salt stress. PLANT SCIENCE : AN INTERNATIONAL JOURNAL OF EXPERIMENTAL PLANT BIOLOGY 2021; 306:110873. [PMID: 33775369 DOI: 10.1016/j.plantsci.2021.110873] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/02/2020] [Revised: 02/27/2021] [Accepted: 03/02/2021] [Indexed: 06/12/2023]
Abstract
Soil salinity reduces root hydraulic conductivity (Lpr) of several plant species. However, how cellular signaling and root hydraulic properties are linked in plants that can cope with water restriction remains unclear. In this work, we exposed the halotolerant species red beet (Beta vulgaris) to increasing concentrations of NaCl to determine the components that might be critical to sustaining the capacity to adjust root hydraulics. Our strategy was to use both hydraulic and cellular approaches in hydroponically grown seedlings during the first osmotic phase of salt stress. Interestingly, Lpr presented a bimodal profile response apart from the magnitude of the imposed salt stress. As well as Lpr, the PIP2-aquaporin profile follows an unphosphorylated/phosphorylated pattern when increasing NaCl concentration while PIP1 aquaporins remain constant. Lpr also shows high sensitivity to cycloheximide. In low NaCl concentrations, Lpr was high and 70 % of its capacity could be attributed to the CHX-inhibited cell-to-cell pathway. More interestingly, roots can maintain a constant spontaneous exudated flow that is independent of the applied NaCl concentration. In conclusion, Beta vulgaris root hydraulic adjustment completely lies in a dominant cell-to-cell pathway that contributes to satisfying plant water demands.
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Affiliation(s)
- Victoria Vitali
- Departamento de Biodiversidad y Biología Experimental, Facultad de Ciencias Exactas y Naturales & Instituto de Biodiversidad, Biología Experimental y Aplicada, Universidad de Buenos Aires and Consejo Nacional de Investigaciones Científicas y Técnicas, C1428EGA, Buenos Aires, Argentina
| | - Moira Sutka
- Departamento de Biodiversidad y Biología Experimental, Facultad de Ciencias Exactas y Naturales & Instituto de Biodiversidad, Biología Experimental y Aplicada, Universidad de Buenos Aires and Consejo Nacional de Investigaciones Científicas y Técnicas, C1428EGA, Buenos Aires, Argentina
| | - Lucas Ojeda
- Departamento de Biodiversidad y Biología Experimental, Facultad de Ciencias Exactas y Naturales & Instituto de Biodiversidad, Biología Experimental y Aplicada, Universidad de Buenos Aires and Consejo Nacional de Investigaciones Científicas y Técnicas, C1428EGA, Buenos Aires, Argentina
| | - Ricardo Aroca
- Departamento de Microbiología del Suelo y Sistemas Simbióticos, Estación Experimental del Zaidín (EEZ-CSIC), Profesor Albareda 1, 18008, Granada, Spain
| | - Gabriela Amodeo
- Departamento de Biodiversidad y Biología Experimental, Facultad de Ciencias Exactas y Naturales & Instituto de Biodiversidad, Biología Experimental y Aplicada, Universidad de Buenos Aires and Consejo Nacional de Investigaciones Científicas y Técnicas, C1428EGA, Buenos Aires, Argentina.
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18
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Barzana G, Rios JJ, Lopez-Zaplana A, Nicolas-Espinosa J, Yepes-Molina L, Garcia-Ibañez P, Carvajal M. Interrelations of nutrient and water transporters in plants under abiotic stress. PHYSIOLOGIA PLANTARUM 2021; 171:595-619. [PMID: 32909634 DOI: 10.1111/ppl.13206] [Citation(s) in RCA: 23] [Impact Index Per Article: 7.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/19/2020] [Revised: 08/20/2020] [Accepted: 09/03/2020] [Indexed: 05/12/2023]
Abstract
Environmental changes cause abiotic stress in plants, primarily through alterations in the uptake of the nutrients and water they require for their metabolism and growth and to maintain their cellular homeostasis. The plasma membranes of cells contain transporter proteins, encoded by their specific genes, responsible for the uptake of nutrients and water (aquaporins). However, their interregulation has rarely been taken into account. Therefore, in this review we identify how the plant genome responds to abiotic stresses such as nutrient deficiency, drought, salinity and low temperature, in relation to both nutrient transporters and aquaporins. Some general responses or regulation mechanisms can be observed under each abiotic stress such as the induction of plasma membrane transporter expression during macronutrient deficiency, the induction of tonoplast transporters and reduction of aquaporins during micronutrients deficiency. However, drought, salinity and low temperatures generally cause an increase in expression of nutrient transporters and aquaporins in tolerant plants. We propose that both types of transporters (nutrients and water) should be considered jointly in order to better understand plant tolerance of stresses.
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Affiliation(s)
- Gloria Barzana
- Aquaporins Group, Centro de Edafologia y Biologia Aplicada del Segura, CEBAS-CSIC, Campus Universitario de Espinardo - 25, Murcia, E-30100, Spain
| | - Juan J Rios
- Aquaporins Group, Centro de Edafologia y Biologia Aplicada del Segura, CEBAS-CSIC, Campus Universitario de Espinardo - 25, Murcia, E-30100, Spain
| | - Alvaro Lopez-Zaplana
- Aquaporins Group, Centro de Edafologia y Biologia Aplicada del Segura, CEBAS-CSIC, Campus Universitario de Espinardo - 25, Murcia, E-30100, Spain
| | - Juan Nicolas-Espinosa
- Aquaporins Group, Centro de Edafologia y Biologia Aplicada del Segura, CEBAS-CSIC, Campus Universitario de Espinardo - 25, Murcia, E-30100, Spain
| | - Lucía Yepes-Molina
- Aquaporins Group, Centro de Edafologia y Biologia Aplicada del Segura, CEBAS-CSIC, Campus Universitario de Espinardo - 25, Murcia, E-30100, Spain
| | - Paula Garcia-Ibañez
- Aquaporins Group, Centro de Edafologia y Biologia Aplicada del Segura, CEBAS-CSIC, Campus Universitario de Espinardo - 25, Murcia, E-30100, Spain
| | - Micaela Carvajal
- Aquaporins Group, Centro de Edafologia y Biologia Aplicada del Segura, CEBAS-CSIC, Campus Universitario de Espinardo - 25, Murcia, E-30100, Spain
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19
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Kamal MM, Ishikawa S, Takahashi F, Suzuki K, Kamo M, Umezawa T, Shinozaki K, Kawamura Y, Uemura M. Large-Scale Phosphoproteomic Study of Arabidopsis Membrane Proteins Reveals Early Signaling Events in Response to Cold. Int J Mol Sci 2020; 21:E8631. [PMID: 33207747 PMCID: PMC7696906 DOI: 10.3390/ijms21228631] [Citation(s) in RCA: 12] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/30/2020] [Revised: 11/12/2020] [Accepted: 11/13/2020] [Indexed: 12/22/2022] Open
Abstract
Cold stress is one of the major factors limiting global crop production. For survival at low temperatures, plants need to sense temperature changes in the surrounding environment. How plants sense and respond to the earliest drop in temperature is still not clearly understood. The plasma membrane and its adjacent extracellular and cytoplasmic sites are the first checkpoints for sensing temperature changes and the subsequent events, such as signal generation and solute transport. To understand how plants respond to early cold exposure, we used a mass spectrometry-based phosphoproteomic method to study the temporal changes in protein phosphorylation events in Arabidopsis membranes during 5 to 60 min of cold exposure. The results revealed that brief cold exposures led to rapid phosphorylation changes in the proteins involved in cellular ion homeostasis, solute and protein transport, cytoskeleton organization, vesical trafficking, protein modification, and signal transduction processes. The phosphorylation motif and kinase-substrate network analysis also revealed that multiple protein kinases, including RLKs, MAPKs, CDPKs, and their substrates, could be involved in early cold signaling. Taken together, our results provide a first look at the cold-responsive phosphoproteome changes of Arabidopsis membrane proteins that can be a significant resource to understand how plants respond to an early temperature drop.
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Affiliation(s)
- Md Mostafa Kamal
- United Graduate School of Agricultural Sciences, Iwate University, Morioka 020-8550, Japan; (M.M.K.); (Y.K.)
| | - Shinnosuke Ishikawa
- Graduate School of Bio-Applications and Systems Engineering, Tokyo University of Agriculture and Technology, Koganei 184-8588, Japan; (S.I.); (T.U.)
| | - Fuminori Takahashi
- Gene Discovery Research Group, RIKEN Center for Sustainable Resource Science, 3-1-1 Koyadai, Tsukuba 305-0074, Japan; (F.T.); (K.S.)
| | - Ko Suzuki
- Department of Biochemistry, Iwate Medical University, Yahaba 028-3694, Japan; (K.S.); (M.K.)
| | - Masaharu Kamo
- Department of Biochemistry, Iwate Medical University, Yahaba 028-3694, Japan; (K.S.); (M.K.)
| | - Taishi Umezawa
- Graduate School of Bio-Applications and Systems Engineering, Tokyo University of Agriculture and Technology, Koganei 184-8588, Japan; (S.I.); (T.U.)
| | - Kazuo Shinozaki
- Gene Discovery Research Group, RIKEN Center for Sustainable Resource Science, 3-1-1 Koyadai, Tsukuba 305-0074, Japan; (F.T.); (K.S.)
| | - Yukio Kawamura
- United Graduate School of Agricultural Sciences, Iwate University, Morioka 020-8550, Japan; (M.M.K.); (Y.K.)
- Department of Plant-Bioscience, Faculty of Agriculture, Iwate University, Morioka 020-8550, Japan
| | - Matsuo Uemura
- United Graduate School of Agricultural Sciences, Iwate University, Morioka 020-8550, Japan; (M.M.K.); (Y.K.)
- Department of Plant-Bioscience, Faculty of Agriculture, Iwate University, Morioka 020-8550, Japan
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20
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de Santana Costa MG, Feltrim D, Mazzafera P, Balbuena TS. Revisiting the stem proteome of Eucalyptus grandis and Eucalyptus globulus: Identification of temperature-induced changes. BIOCHIMICA ET BIOPHYSICA ACTA-PROTEINS AND PROTEOMICS 2020; 1868:140530. [PMID: 32853770 DOI: 10.1016/j.bbapap.2020.140530] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/01/2020] [Revised: 08/13/2020] [Accepted: 08/15/2020] [Indexed: 11/25/2022]
Abstract
Eucalyptus grandis and Eucalyptus globulus are important species for the Brazilian forestry industry. E. grandis plantations are mainly found in tropical regions, yet E. globulus plants are usually cultivated under moderate to low temperature conditions. As temperature seems to be a key factor for the planting of these species, we revisited our previously generated shotgun proteomics dataset to identify the main patterns of proteome regulation induced by thermal stimulus and to pinpoint specific proteins involved in the environmental response. Large-scale analysis has pointed out the different proteomic responses of E. grandis and E. globulus under temperature stimulus, with 296 proteins considered to be differentially regulated in the stems of Eucalyptus spp. grown at different temperatures. A stringent filtering approach was used to identify the most differentially regulated proteins. Through the stringent criteria, 66 proteins were found to be enriched in the plant species. Cultivation of E. globulus plants in low-temperature conditions induced the highest number of differentially regulated proteins. Additionally, metabolic proteins were mostly down-regulated, while stress-related proteins were majorly up-regulated in both species. Finally, the subset of the most differentially regulated proteins comprised new candidates of protein markers of temperature stress.
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Affiliation(s)
| | - Daniela Feltrim
- University of Campinas (UNICAMP), Institute of Biology, Campinas, SP, Brazil
| | - Paulo Mazzafera
- University of Campinas (UNICAMP), Institute of Biology, Campinas, SP, Brazil
| | - Tiago Santana Balbuena
- São Paulo State University (UNESP), School of Agriculture and Veterinary Sciences, Jaboticabal, SP, Brazil.
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21
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Ding L, Milhiet T, Couvreur V, Nelissen H, Meziane A, Parent B, Aesaert S, Van Lijsebettens M, Inzé D, Tardieu F, Draye X, Chaumont F. Modification of the Expression of the Aquaporin ZmPIP2;5 Affects Water Relations and Plant Growth. PLANT PHYSIOLOGY 2020; 182:2154-2165. [PMID: 31980571 PMCID: PMC7140956 DOI: 10.1104/pp.19.01183] [Citation(s) in RCA: 31] [Impact Index Per Article: 7.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/20/2019] [Accepted: 01/06/2020] [Indexed: 05/18/2023]
Abstract
The plasma membrane intrinsic protein PIP2;5 is the most highly expressed aquaporin in maize (Zea mays) roots. Here, we investigated how deregulation of PIP2;5 expression affects water relations and growth using maize overexpression (OE; B104 inbred) or knockout (KO; W22 inbred) lines. The hydraulic conductivity of the cortex cells of roots grown hydroponically was higher in PIP2;5 OE and lower in pip2;5 KO lines compared with the corresponding wild-type plants. While whole-root conductivity decreased in the KO lines compared to the wild type, no difference was observed in OE plants. This paradox was interpreted using the MECHA hydraulic model, which computes the radial flow of water within root sections. The model hints that the plasma membrane permeability of the cells is not radially uniform but that PIP2;5 may be saturated in cell layers with apoplastic barriers, i.e. the endodermis and exodermis, suggesting the presence of posttranslational mechanisms controlling the abundance of PIP in the plasma membrane in these cells. At the leaf level, where the PIP2;5 gene is weakly expressed in wild-type plants, the hydraulic conductance was higher in the PIP2;5 OE lines compared with the wild-type plants, whereas no difference was observed in the pip2;5 KO lines. The temporal trend of leaf elongation rate, used as a proxy for that of xylem water potential, was faster in PIP2;5 OE plants upon mild stress, but not in well-watered conditions, demonstrating that PIP2;5 may play a beneficial role in plant growth under specific conditions.
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Affiliation(s)
- Lei Ding
- Louvain Institute of Biomolecular Science and Technology, Université catholique de Louvain, 1348 Louvain-la-Neuve, Belgium
| | - Thomas Milhiet
- Louvain Institute of Biomolecular Science and Technology, Université catholique de Louvain, 1348 Louvain-la-Neuve, Belgium
| | - Valentin Couvreur
- Earth and Life Institute, Université catholique de Louvain, 1348 Louvain-la-Neuve, Belgium
| | - Hilde Nelissen
- Center for Plant Systems Biology, Vlaams Instituut voor Biotechnologie-Ghent University, 9052 Ghent, Belgium
- Department of Plant Biotechnology and Bioinformatics, Ghent University, 9052 Ghent, Belgium
| | - Adel Meziane
- Louvain Institute of Biomolecular Science and Technology, Université catholique de Louvain, 1348 Louvain-la-Neuve, Belgium
- Laboratoire d'Ecophysiologie des Plantes sous Stress Environnementaux (LEPSE), Université de Montpellier, Institut National de la Recherche Agronomique (INRA), F-34000 Montpellier, France
| | - Boris Parent
- Laboratoire d'Ecophysiologie des Plantes sous Stress Environnementaux (LEPSE), Université de Montpellier, Institut National de la Recherche Agronomique (INRA), F-34000 Montpellier, France
| | - Stijn Aesaert
- Center for Plant Systems Biology, Vlaams Instituut voor Biotechnologie-Ghent University, 9052 Ghent, Belgium
- Department of Plant Biotechnology and Bioinformatics, Ghent University, 9052 Ghent, Belgium
| | - Mieke Van Lijsebettens
- Center for Plant Systems Biology, Vlaams Instituut voor Biotechnologie-Ghent University, 9052 Ghent, Belgium
- Department of Plant Biotechnology and Bioinformatics, Ghent University, 9052 Ghent, Belgium
| | - Dirk Inzé
- Center for Plant Systems Biology, Vlaams Instituut voor Biotechnologie-Ghent University, 9052 Ghent, Belgium
- Department of Plant Biotechnology and Bioinformatics, Ghent University, 9052 Ghent, Belgium
| | - François Tardieu
- Laboratoire d'Ecophysiologie des Plantes sous Stress Environnementaux (LEPSE), Université de Montpellier, Institut National de la Recherche Agronomique (INRA), F-34000 Montpellier, France
| | - Xavier Draye
- Earth and Life Institute, Université catholique de Louvain, 1348 Louvain-la-Neuve, Belgium
| | - François Chaumont
- Louvain Institute of Biomolecular Science and Technology, Université catholique de Louvain, 1348 Louvain-la-Neuve, Belgium
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22
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Cavalheiro MF, Gavassi MA, Silva GS, Nogueira MA, Silva CMS, Domingues DS, Habermann G. Low root PIP1-1 and PIP2 aquaporins expression could be related to reduced hydration in 'Rangpur' lime plants exposed to aluminium. FUNCTIONAL PLANT BIOLOGY : FPB 2020; 47:112-121. [PMID: 31864427 DOI: 10.1071/fp19032] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/26/2019] [Accepted: 09/24/2019] [Indexed: 06/10/2023]
Abstract
In acidic soils, aluminium (Al) occurs as Al3+, which is phytotoxic. One of the most conspicuous symptoms of Al toxicity is the root growth inhibition, which can lead to low water uptake and consequent reduction in leaf hydration and gas exchange. However, fibrous xylem vessels have been observed in roots of 'Rangpur' lime plants (Citrus limonia L.) when exposed to Al, which could affect the functioning of aquaporins, ultimately reducing their expression. We confirmed a decrease of CO2 assimilation (A), stomatal conductance (gs), transpiration (E) and relative leaf water content (RWC) in 3-month-old C. limonia plants exposed to 1480 μM Al in nutrient solution for 90 days. The estimated hydraulic conductivity from soil to the leaf (KL) and leaf water potential (Ψw) also showed low values, although not consistently reduced over time of Al exposure. The relative expression of aquaporin genes belonging to PIP family (PIP1-1, PIP1-2 and PIP2) showed downregulation for ClPIP1-1 and ClPIP2 and upregulation for ClPIP1-2 in plants exposed to Al. Furthermore, ClPIP1-1 was positively correlated with A and gs in plants exposed to Al. Therefore, downregulation of ClPIP1-1 and ClPIP2 in roots of 'Rangpur' lime plants could be associated with the low leaf hydration of this species when exposed to Al.
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Affiliation(s)
- Mariana F Cavalheiro
- Programa de Pós-Graduação em Ciências Biológicas (Biologia Vegetal), Universidade Estadual Paulista, UNESP, Instituto de Biociências, Departamento de Botânica, Av. 24-A, 1515; 13506-900, Rio Claro, SP, Brazil
| | - Marina A Gavassi
- Programa de Pós-Graduação em Ciências Biológicas (Biologia Vegetal), Universidade Estadual Paulista, UNESP, Instituto de Biociências, Departamento de Botânica, Av. 24-A, 1515; 13506-900, Rio Claro, SP, Brazil
| | - Giselle S Silva
- Programa de Pós-Graduação em Ciências Biológicas (Biologia Vegetal), Universidade Estadual Paulista, UNESP, Instituto de Biociências, Departamento de Botânica, Av. 24-A, 1515; 13506-900, Rio Claro, SP, Brazil
| | - Matheus A Nogueira
- Programa de Pós-Graduação em Ciências Biológicas (Biologia Vegetal), Universidade Estadual Paulista, UNESP, Instituto de Biociências, Departamento de Botânica, Av. 24-A, 1515; 13506-900, Rio Claro, SP, Brazil
| | - Carolina M S Silva
- Escola Superior de Agricultura 'Luiz de Queiróz', Universidade de São Paulo, ESALQ-USP, Departamento de Ciências Biológicas, Av. Pádua Dias, 11, 13418-900, Piracicaba, SP, Brazil
| | - Douglas S Domingues
- Departamento de Botânica, Universidade Estadual Paulista, UNESP, Instituto de Biociências, Av. 24-A, 1515; 13506-900, Rio Claro, SP, Brazil
| | - Gustavo Habermann
- Departamento de Botânica, Universidade Estadual Paulista, UNESP, Instituto de Biociências, Av. 24-A, 1515; 13506-900, Rio Claro, SP, Brazil; and Corresponding author.
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23
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Li Y, Song X, Li S, Salter WT, Barbour MM. The role of leaf water potential in the temperature response of mesophyll conductance. THE NEW PHYTOLOGIST 2020; 225:1193-1205. [PMID: 31545519 DOI: 10.1111/nph.16214] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/31/2019] [Accepted: 09/14/2019] [Indexed: 06/10/2023]
Abstract
Variation in temperature (T) is usually accompanied by changes in leaf water potential (Ψleaf ), which may influence mesophyll conductance (gm ). However, the effects of Ψleaf on gm have not yet been considered in models of the gm response to temperature. Temperature responses of gm and Ψleaf and the response of gm to Ψleaf were studied in rice (Oryza sativa) and wheat (Triticum aestivum), and then an empirical model of Ψleaf was incorporated into an existing gm -T model. In wheat, Ψleaf was dramatically decreased with increasing T, whereas in rice Ψleaf was less sensitive or insensitive to T. Without taking Ψleaf into account, gm for wheat showed no response to T. However, at a given Ψleaf , gm was significantly higher at high temperature compared with low. After incorporating the function of Ψleaf into the gm -T model, we suggest that the gm -T relationship can be influenced by the activation and deactivation energy for membrane permeability, Ψleaf gradient between temperatures, and the sensitivity of gm to Ψleaf , below a threshold (Ψleaf,0 ). The data presented here suggest that Ψleaf plays an important role in the gm -T relationship and should be considered in future studies related to the temperature response of gm and photosynthesis.
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Affiliation(s)
- Yong Li
- Ministry of Agriculture Key Laboratory of Crop Ecophysiology and Farming System in the Middle Reaches of the Yangtze River, College of Plant Science and Technology, Huazhong Agricultural University, Wuhan, Hubei, 430070, China
| | - Xin Song
- College of Life Sciences and Oceanography, Shenzhen University, Shenzhen, Guangdong, 518000, China
| | - Si Li
- School of Life and Environmental Sciences, Sydney Institute of Agriculture, The University of Sydney, Sydney, 2570, NSW, Australia
| | - William T Salter
- School of Life and Environmental Sciences, Sydney Institute of Agriculture, The University of Sydney, Sydney, 2570, NSW, Australia
| | - Margaret M Barbour
- School of Life and Environmental Sciences, Sydney Institute of Agriculture, The University of Sydney, Sydney, 2570, NSW, Australia
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24
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Cai X, Magwanga RO, Xu Y, Zhou Z, Wang X, Hou Y, Wang Y, Zhang Y, Liu F, Wang K. Comparative transcriptome, physiological and biochemical analyses reveal response mechanism mediated by CBF4 and ICE2 in enhancing cold stress tolerance in Gossypium thurberi. AOB PLANTS 2019; 11:plz045. [PMID: 31777648 PMCID: PMC6863471 DOI: 10.1093/aobpla/plz045] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/07/2019] [Accepted: 07/10/2019] [Indexed: 05/04/2023]
Abstract
Low temperature is one of the key environmental stresses that impair plant growth and significantly restricts the productivity and spatial distribution of crop plants. Gossypium thurberi, a wild diploid cotton species, has adapted to a wide range of temperatures and exhibits a better tolerance to chilling stress. Here, we compared phenotypes and physiochemical changes in G. thurberi under cold stress and found this species indeed showed better cold tolerance. Therefore, to understand the molecular mechanisms of the cold tolerance in G. thurberi, we compared transcription changes in leaves of G. thurberi under cold stress by high-throughput transcriptome sequencing. In total, 35 617 unigenes were identified in the whole-genome transcription profile, and 4226 differentially expressed genes (DEGs) were discovered in the leaves upon cold treatment. Gene Ontology (GO) classification analyses showed that the majority of DEGs belonged to categories of signal transduction, transcription factors (TFs) and carbohydrate transport and metabolism. The expression of several cold-responsive genes such as ICE1, CBF4, RAP2-7 and abscisic acid (ABA) biosynthesis genes involved in different signalling pathways were induced after G. thurberi seedlings were exposed to cold stress. Furthermore, cold sensitivity was increased in CBF4 and ICE2 virus-induced gene silencing (VIGS) plants, and high level of malondialdehyde (MDA) showed that the CBF4 and ICE2 silenced plants were under oxidative stress compared to their wild types, which relatively had higher levels of antioxidant enzyme activity, as evident by high levels of proline and superoxide dismutase (SOD) content. In conclusion, our findings reveal a new regulatory network of cold stress response in G. thurberi and broaden our understanding of the cold tolerance mechanism in cotton, which might accelerate functional genomics studies and genetic improvement for cold stress tolerance in cultivated cotton.
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Affiliation(s)
- Xiaoyan Cai
- State Key Laboratory of Cotton Biology /Institute of Cotton Research, Chinese Academy of Agricultural Science, Anyang, Henan, China
- College of Plant Science and Technology, Huazhong Agricultural University, Wuhan, Hubei, China
| | - Richard Odongo Magwanga
- State Key Laboratory of Cotton Biology /Institute of Cotton Research, Chinese Academy of Agricultural Science, Anyang, Henan, China
- School of Biological and Physical Sciences (SBPS), Jaramogi Oginga Odinga University of Science and Technology (JOOUST), Bondo, Kenya
| | - Yanchao Xu
- State Key Laboratory of Cotton Biology /Institute of Cotton Research, Chinese Academy of Agricultural Science, Anyang, Henan, China
| | - Zhongli Zhou
- State Key Laboratory of Cotton Biology /Institute of Cotton Research, Chinese Academy of Agricultural Science, Anyang, Henan, China
| | - Xingxing Wang
- State Key Laboratory of Cotton Biology /Institute of Cotton Research, Chinese Academy of Agricultural Science, Anyang, Henan, China
| | - Yuqing Hou
- State Key Laboratory of Cotton Biology /Institute of Cotton Research, Chinese Academy of Agricultural Science, Anyang, Henan, China
| | - Yuhong Wang
- State Key Laboratory of Cotton Biology /Institute of Cotton Research, Chinese Academy of Agricultural Science, Anyang, Henan, China
| | - Yuanming Zhang
- College of Plant Science and Technology, Huazhong Agricultural University, Wuhan, Hubei, China
| | - Fang Liu
- State Key Laboratory of Cotton Biology /Institute of Cotton Research, Chinese Academy of Agricultural Science, Anyang, Henan, China
| | - Kunbo Wang
- State Key Laboratory of Cotton Biology /Institute of Cotton Research, Chinese Academy of Agricultural Science, Anyang, Henan, China
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25
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Li J, Jiao Z, He R, Sun Y, Xu Q, Zhang J, Jiang Y, Li Q, Niu J. Gene Expression Profiles and microRNA Regulation Networks in Tiller Primordia, Stem Tips, and Young Spikes of Wheat Guomai 301. Genes (Basel) 2019; 10:genes10090686. [PMID: 31500166 PMCID: PMC6770858 DOI: 10.3390/genes10090686] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/27/2019] [Revised: 08/07/2019] [Accepted: 08/22/2019] [Indexed: 01/26/2023] Open
Abstract
Tillering and spike differentiation are two key events for wheat (Triticum aestivum L.). A study on the transcriptomes and microRNA group profiles of wheat at the two key developmental stages will bring insight into the molecular regulation mechanisms. Guomai 301 is a representative excellent new high yield wheat cultivar in the Henan province in China. The transcriptomes and microRNA (miRNA) groups of tiller primordia (TPs), stem tips (STs), and young spikes (YSs) in Guomai 301 were compared to each other. A total of 1741 tillering specifically expressed and 281 early spikes differentiating specifically expressed differentially expressed genes (DEGs) were identified. Six major expression profile clusters of tissue-specific DEGs for the three tissues were classified by gene co-expression analysis using K-means cluster. The ribosome (ko03010), photosynthesis-antenna proteins (ko00196), and plant hormone signal transduction (ko04075) were the main metabolic pathways in TPs, STs, and YSs, respectively. Similarly, 67 TP specifically expressed and 19 YS specifically expressed differentially expressed miRNAs were identified, 65 of them were novel. The roles of 3 well known miRNAs, tae-miR156, tae-miR164, and tae-miR167a, in post-transcriptional regulation were similar to that of other researches. There were 651 significant negative miRNA-mRNA interaction pairs in TPs and YSs, involving 63 differentially expressed miRNAs (fold change > 4) and 416 differentially expressed mRNAs. Among them 12 key known miRNAs and 16 novel miRNAs were further analyzed, and miRNA-mRNA regulatory networks during tillering and early spike differentiating were established.
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Affiliation(s)
- Junchang Li
- National Centre of Engineering and Technological Research for Wheat / Key Laboratory of Physiological Ecology and Genetic Improvement of Food Crops in Henan Province, Henan Agricultural University, Zhengzhou 450046, China
| | - Zhixin Jiao
- National Centre of Engineering and Technological Research for Wheat / Key Laboratory of Physiological Ecology and Genetic Improvement of Food Crops in Henan Province, Henan Agricultural University, Zhengzhou 450046, China
| | - Ruishi He
- National Centre of Engineering and Technological Research for Wheat / Key Laboratory of Physiological Ecology and Genetic Improvement of Food Crops in Henan Province, Henan Agricultural University, Zhengzhou 450046, China
| | - Yulong Sun
- National Centre of Engineering and Technological Research for Wheat / Key Laboratory of Physiological Ecology and Genetic Improvement of Food Crops in Henan Province, Henan Agricultural University, Zhengzhou 450046, China
| | - Qiaoqiao Xu
- National Centre of Engineering and Technological Research for Wheat / Key Laboratory of Physiological Ecology and Genetic Improvement of Food Crops in Henan Province, Henan Agricultural University, Zhengzhou 450046, China
| | - Jing Zhang
- National Centre of Engineering and Technological Research for Wheat / Key Laboratory of Physiological Ecology and Genetic Improvement of Food Crops in Henan Province, Henan Agricultural University, Zhengzhou 450046, China
| | - Yumei Jiang
- National Centre of Engineering and Technological Research for Wheat / Key Laboratory of Physiological Ecology and Genetic Improvement of Food Crops in Henan Province, Henan Agricultural University, Zhengzhou 450046, China
| | - Qiaoyun Li
- National Centre of Engineering and Technological Research for Wheat / Key Laboratory of Physiological Ecology and Genetic Improvement of Food Crops in Henan Province, Henan Agricultural University, Zhengzhou 450046, China
| | - Jishan Niu
- National Centre of Engineering and Technological Research for Wheat / Key Laboratory of Physiological Ecology and Genetic Improvement of Food Crops in Henan Province, Henan Agricultural University, Zhengzhou 450046, China.
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26
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Tamang BG, Schoppach R, Monnens D, Steffenson BJ, Anderson JA, Sadok W. Variability in temperature-independent transpiration responses to evaporative demand correlate with nighttime water use and its circadian control across diverse wheat populations. PLANTA 2019; 250:115-127. [PMID: 30941570 DOI: 10.1007/s00425-019-03151-0] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/19/2018] [Accepted: 03/25/2019] [Indexed: 06/09/2023]
Abstract
Nocturnal transpiration, through its circadian control, plays a role in modulating daytime transpiration response to increasing evaporative demand, to potentially enable drought tolerance in wheat. Limiting plant transpiration rate (TR) in response to increasing vapor pressure deficit (VPD) has been suggested to enable drought tolerance through water conservation. However, there is very little information on the extent of diversity of TR response curves to "true" VPD (i.e., independent from temperature). Furthermore, new evidence indicate that water-saving could operate by modulating nocturnal TR (TRN), and that this response might be coupled to daytime gas exchange. Based on 3 years of experimental data on a diverse group of 77 genotypes from 25 countries and 5 continents, a first goal of this study was to characterize the functional diversity in daytime TR responses to VPD and TRN in wheat. A second objective was to test the hypothesis that these traits could be coupled through the circadian clock. Using a new gravimetric phenotyping platform that allowed for independent temperature and VPD control, we identified three and fourfold variation in daytime and nighttime responses, respectively. In addition, TRN was found to be positively correlated with slopes of daytime TR responses to VPD, and we identified pre-dawn variation in TRN that likely mediated this relationship. Furthermore, pre-dawn increase in TRN positively correlated with the year of release among drought-tolerant Australian cultivars and with the VPD threshold at which they initiated water-saving. Overall, the study indicates a substantial diversity in TR responses to VPD that could be leveraged to enhance fitness under water-limited environments, and that TRN and its circadian control may play an important role in the expression of water-saving.
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Affiliation(s)
- Bishal G Tamang
- Department of Agronomy and Plant Genetics, University of Minnesota Twin Cities, Twin Cities, MN, USA
| | - Rémy Schoppach
- Department of Agronomy and Plant Genetics, University of Minnesota Twin Cities, Twin Cities, MN, USA
- Earth and Life Institute, Université Catholique de Louvain, Louvain-la-Neuve, Belgium
| | - Daniel Monnens
- Department of Agronomy and Plant Genetics, University of Minnesota Twin Cities, Twin Cities, MN, USA
| | - Brian J Steffenson
- Department of Plant Pathology, University of Minnesota, Twin Cities, MN, USA
| | - James A Anderson
- Department of Agronomy and Plant Genetics, University of Minnesota Twin Cities, Twin Cities, MN, USA
| | - Walid Sadok
- Department of Agronomy and Plant Genetics, University of Minnesota Twin Cities, Twin Cities, MN, USA.
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27
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Franzini VI, Azcón R, Ruiz-Lozano JM, Aroca R. Rhizobial symbiosis modifies root hydraulic properties in bean plants under non-stressed and salinity-stressed conditions. PLANTA 2019; 249:1207-1215. [PMID: 30603790 DOI: 10.1007/s00425-018-03076-0] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/29/2018] [Accepted: 12/19/2018] [Indexed: 05/10/2023]
Abstract
Rhizobial symbiosis improved the water status of bean plants under salinity-stress conditions, in part by increasing their osmotic root water flow. One of the main problems for agriculture worldwide is the increasing salinization of farming lands. The use of soil beneficial microorganisms stands up as a way to tackle this problem. One approach is the use of rhizobial N2-fixing, nodule-forming bacteria. Salinity-stress causes leaf dehydration due to an imbalance between water lost through stomata and water absorbed by roots. The aim of the present study was to elucidate how rhizobial symbiosis modulates the water status of bean (Phaseolus vulgaris) plants under salinity-stress conditions, by assessing the effects on root hydraulic properties. Bean plants were inoculated or not with a Rhizobium leguminosarum strain and subjected to moderate salinity-stress. The rhizobial symbiosis was found to improve leaf water status and root osmotic water flow under such conditions. Higher content of nitrogen and lower values of sodium concentration in root tissues were detected when compared to not inoculated plants. In addition, a drop in the osmotic potential of xylem sap and increased amount of PIP aquaporins could favour higher root osmotic water flow in the inoculated plants. Therefore, it was found that rhizobial symbiosis may also improve root osmotic water flow of the host plants under salinity stress.
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Affiliation(s)
- Vinicius Ide Franzini
- Department of Soil Microbiology and Symbiotic System, Estación Experimental del Zaidín (CSIC), Profesor Albareda 1, 18008, Granada, Spain
| | - Rosario Azcón
- Department of Soil Microbiology and Symbiotic System, Estación Experimental del Zaidín (CSIC), Profesor Albareda 1, 18008, Granada, Spain
| | - Juan Manuel Ruiz-Lozano
- Department of Soil Microbiology and Symbiotic System, Estación Experimental del Zaidín (CSIC), Profesor Albareda 1, 18008, Granada, Spain
| | - Ricardo Aroca
- Department of Soil Microbiology and Symbiotic System, Estación Experimental del Zaidín (CSIC), Profesor Albareda 1, 18008, Granada, Spain.
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28
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Stanfield R, Laur J. Aquaporins Respond to Chilling in the Phloem by Altering Protein and mRNA Expression. Cells 2019; 8:E202. [PMID: 30818743 PMCID: PMC6468725 DOI: 10.3390/cells8030202] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/31/2019] [Revised: 02/19/2019] [Accepted: 02/21/2019] [Indexed: 11/17/2022] Open
Abstract
Previous experiments using heat exchangers (liquid cooled blocks) to chill a portion of plant stem have shown a transient stoppage in phloem translocation and an increase in measured phloem pressure. Although a chilled-induced stoppage of phloem transport has been known for over 100 years, the mechanism of this phenomenon is still poorly understood. Recently, work has highlighted that aquaporins occur within the plasma membrane of the sieve tubes along the entire source-to-sink pathway, and that isoforms of these water channel proteins may change dynamically. Aquaporins show regulatory roles in controlling tissue and cellular water status in response to environmental hardships. Thus, we tested if protein localization and mRNA transcript abundance changes occur in response to chilling in balsam poplar (Populus balsamifera) using immunohistochemistry and qrtPCR. The results of the immunolocalization experiments show that the labeling intensity of the sieve elements treated for only 2 min of chill time significantly increased for PIP2. After 10 min of chilling, this signal declined significantly to lower than that of the pre-chilled sieve elements. Overall, the abundance of mRNA transcript increased for the tested PIP2s following cold application. We discuss the implication that aquaporins are responsible for the alleviation of sieve tube pressure and the resumption of flow following a cold-induced blockage event.
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Affiliation(s)
- Ryan Stanfield
- Department of Renewable Resources, University of Alberta, Edmonton, AB T6G 2R3, Canada.
| | - Joan Laur
- Institut de Recherche en Biologie Végétale, Université de Montréal, Montréal, QC H3T 1J4, Canada.
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29
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Mousavi S, Regni L, Bocchini M, Mariotti R, Cultrera NGM, Mancuso S, Googlani J, Chakerolhosseini MR, Guerrero C, Albertini E, Baldoni L, Proietti P. Physiological, epigenetic and genetic regulation in some olive cultivars under salt stress. Sci Rep 2019; 9:1093. [PMID: 30705308 PMCID: PMC6355907 DOI: 10.1038/s41598-018-37496-5] [Citation(s) in RCA: 40] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/01/2018] [Accepted: 11/30/2018] [Indexed: 12/20/2022] Open
Abstract
Cultivated olive, a typical fruit crop species of the semi-arid regions, could successfully face the new scenarios driven by the climate change through the selection of tolerant varieties to salt and drought stresses. In the present work, multidisciplinary approaches, including physiological, epigenetic and genetic studies, have been applied to clarify the salt tolerance mechanisms in olive. Four varieties (Koroneiki, Royal de Cazorla, Arbequina and Picual) and a related form (O. europaea subsp. cuspidata) were grown in a hydroponic system under different salt concentrations from zero to 200 mM. In order to verify the plant response under salt stress, photosynthesis, gas exchange and relative water content were measured at different time points, whereas chlorophyll and leaf concentration of Na+, K+ and Ca2+ ions, were quantified at 43 and 60 days after treatment, when stress symptoms became prominent. Methylation sensitive amplification polymorphism (MSAP) technique was used to assess the effects of salt stress on plant DNA methylation. Several fragments resulted differentially methylated among genotypes, treatments and time points. Real time quantitative PCR (RT-qPCR) analysis revealed significant expression changes related to plant response to salinity. Four genes (OePIP1.1, OePetD, OePI4Kg4 and OeXyla) were identified, as well as multiple retrotransposon elements usually targeted by methylation under stress conditions.
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Affiliation(s)
- Soraya Mousavi
- Università degli Studi di Perugia, Dept. Agricultural, Food and Environmental Sciences, Perugia, Italy
- CNR - Institute of Biosciences and Bioresources, Perugia, Italy
| | - Luca Regni
- Università degli Studi di Perugia, Dept. Agricultural, Food and Environmental Sciences, Perugia, Italy
| | - Marika Bocchini
- Università degli Studi di Perugia, Dept. Agricultural, Food and Environmental Sciences, Perugia, Italy
| | | | | | - Stefano Mancuso
- Università degli Studi di Firenze, Dept. Agrifood Production and Environmental Sciences, Florence, Italy
| | - Jalaladdin Googlani
- Università degli Studi di Firenze, Dept. Agrifood Production and Environmental Sciences, Florence, Italy
| | | | | | - Emidio Albertini
- Università degli Studi di Perugia, Dept. Agricultural, Food and Environmental Sciences, Perugia, Italy
| | - Luciana Baldoni
- CNR - Institute of Biosciences and Bioresources, Perugia, Italy.
| | - Primo Proietti
- Università degli Studi di Perugia, Dept. Agricultural, Food and Environmental Sciences, Perugia, Italy
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30
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Gupta R, Min CW, Meng Q, Agrawal GK, Rakwal R, Kim ST. Comparative phosphoproteome analysis upon ethylene and abscisic acid treatment in Glycine max leaves. PLANT PHYSIOLOGY AND BIOCHEMISTRY : PPB 2018; 130:173-180. [PMID: 29990770 DOI: 10.1016/j.plaphy.2018.07.002] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/20/2018] [Revised: 07/02/2018] [Accepted: 07/02/2018] [Indexed: 05/06/2023]
Abstract
Abscisic acid (ABA) and ethylene play key roles in growth and development of plants. Several attempts have been made to investigate the ABA and ethylene-induced signaling in plants, however, the involvement of phosphorylation and dephosphorylation in fine-tuning of the induced response has not been investigated much. Here, a phosphoproteomic analysis was carried out to identify the phosphoproteins in response to ABA, ethylene (ET) and combined ABA + ET treatments in soybean leaves. Phosphoproteome analysis led to the identification of 802 phosphopeptides, representing 422 unique protein groups. A comparative analysis led to the identification of 40 phosphosites that significantly changed in response to given hormone treatments. Functional annotation of the identified phosphoproteins showed that these were majorly involved in nucleic acid binding, signaling, transport and stress response. Localization prediction showed that 67% of the identified phosphoproteins were nuclear, indicating their potential involvement in gene regulation. Taken together, these results provide an overview of the ABA, ET and combined ABA + ET signaling in soybean leaves at phosphoproteome level.
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Affiliation(s)
- Ravi Gupta
- Department of Plant Bioscience, Life and Industry Convergence Research Institute, Pusan National University, Miryang, 627-707, Republic of Korea
| | - Cheol Woo Min
- Department of Plant Bioscience, Life and Industry Convergence Research Institute, Pusan National University, Miryang, 627-707, Republic of Korea
| | - Qingfeng Meng
- Department of Plant Bioscience, Life and Industry Convergence Research Institute, Pusan National University, Miryang, 627-707, Republic of Korea
| | - Ganesh Kumar Agrawal
- Research Laboratory for Biotechnology and Biochemistry (RLABB), GPO Box 13265, Kathmandu, Nepal; GRADE Academy Private Limited, Adarsh Nagar-13, Birgunj, Nepal
| | - Randeep Rakwal
- GRADE Academy Private Limited, Adarsh Nagar-13, Birgunj, Nepal; Faculty of Health and Sport Sciences, University of Tsukuba, 1-1-1 Tennodai, Tsukuba, Ibaraki, 305-8574, Japan; Global Research Center for Innovative Life Science, Peptide Drug Innovation, School of Pharmacy and Pharmaceutical Sciences, Hoshi University, 4-41 Ebara 2-chome, Shinagawa, Tokyo, 142-8501, Japan
| | - Sun Tae Kim
- Department of Plant Bioscience, Life and Industry Convergence Research Institute, Pusan National University, Miryang, 627-707, Republic of Korea.
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31
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Lee YK, Rhee JY, Lee SH, Chung GC, Park SJ, Segami S, Maeshima M, Choi G. Functionally redundant LNG3 and LNG4 genes regulate turgor-driven polar cell elongation through activation of XTH17 and XTH24. PLANT MOLECULAR BIOLOGY 2018; 97:23-36. [PMID: 29616436 DOI: 10.1007/s11103-018-0722-0] [Citation(s) in RCA: 19] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/12/2017] [Accepted: 03/25/2018] [Indexed: 05/03/2023]
Abstract
In this work, we genetically characterized the function of Arabidopsis thaliana, LONGIFOLIA (LNG1), LNG2, LNG3, LNG4, their contribution to regulate vegetative architecture in plant. We used molecular and biophysical approaches to elucidate a gene function that regulates vegetative architecture, as revealed by the leaf phenotype and later effects on flowering patterns in Arabidopsis loss-of-function mutants. As a result, LNG genes play an important role in polar cell elongation by turgor pressure controlling the activation of XTH17 and XTH24. Plant vegetative architecture is related to important traits that later influence the floral architecture involved in seed production. Leaf morphology is the primary key trait to compose plant vegetative architecture. However, molecular mechanism on leaf shape determination is not fully understood even in the model plant A. thaliana. We previously showed that LONGIFOLIA (LNG1) and LONGIFOLIA2 (LNG2) genes regulate leaf morphology by promoting longitudinal cell elongation in Arabidopsis. In this study, we further characterized two homologs of LNG1, LNG3, and LNG4, using genetic, biophysical, and molecular approaches. Single loss-of-function mutants, lng3 and lng4, do not show any phenotypic difference, but mutants of lng quadruple (lngq), and lng1/2/3 and lng1/2/4 triples, display reduced leaf length, compared to wild type. Using the paradermal analysis, we conclude that the reduced leaf size of lngq is due to decreased cell elongation in the direction of longitudinal leaf growth, and not decreased cell proliferation. This data indicate that LNG1/2/3/4 are functionally redundant, and are involved in polar cell elongation in Arabidopsis leaf. Using a biophysical approach, we show that the LNGs contribute to maintain high turgor pressure, thus regulating turgor pressure-dependent polar cell elongation. In addition, gene expression analysis showed that LNGs positively regulate the expression of the cell wall modifying enzyme encoded by a multi-gene family, xyloglucan endotransglucosylase/hydrolase (XTH). Taking all of these together, we propose that LNG related genes play an important role in polar cell elongation by changing turgor pressure and controlling the activation of XTH17 and XTH24.
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Affiliation(s)
- Young Koung Lee
- Department of Biological Sciences, KAIST, Daejeon, 34141, South Korea.
- Division of Biological Sciences and Institute for Basic Science/Division of Biological Sciences and Research Institute for Glycoscience, Wonkwang University, Iksan, 54538, South Korea.
| | - Ji Ye Rhee
- Department of Plant Biotechnology, Agricultural Plant Stress Research Center, College of Agriculture and Life Sciences, Chonnam National University, Gwangju, 61186, South Korea
| | - Seong Hee Lee
- Department of Renewable Resources, University of Alberta, Edmonton, AB, T6G 2E3, Canada
| | - Gap Chae Chung
- Department of Plant Biotechnology, Agricultural Plant Stress Research Center, College of Agriculture and Life Sciences, Chonnam National University, Gwangju, 61186, South Korea
| | - Soon Ju Park
- Division of Biological Sciences and Institute for Basic Science/Division of Biological Sciences and Research Institute for Glycoscience, Wonkwang University, Iksan, 54538, South Korea
| | - Shoji Segami
- Graduate School of Bioagricultural Sciences, Nagoya University, Nagoya, 464-8601, Japan
| | - Masayohi Maeshima
- Graduate School of Bioagricultural Sciences, Nagoya University, Nagoya, 464-8601, Japan
| | - Giltsu Choi
- Department of Biological Sciences, KAIST, Daejeon, 34141, South Korea
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Stogsdill B, Frisbie J, Krane CM, Goldstein DL. Expression of the aquaglyceroporin HC-9 in a freeze-tolerant amphibian that accumulates glycerol seasonally. Physiol Rep 2018; 5:5/15/e13331. [PMID: 28784850 PMCID: PMC5555883 DOI: 10.14814/phy2.13331] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/03/2017] [Accepted: 05/19/2017] [Indexed: 12/22/2022] Open
Abstract
As ambient temperatures fall in the autumn, freeze‐tolerant Cope's gray treefrogs, Dryophytes chrysoscelis (formerly Hyla chrysoscelis), accumulate glycerol as a cryoprotective agent. We hypothesized that these treefrogs express an ortholog of the mammalian aquaglyceroporin AQP9 and that AQP9 expression is upregulated in the cold to facilitate glycerol transport. We sequenced 1790 bp from cloned cDNA that codes for a 315 amino acid protein, HC‐9, containing the predicted six transmembrane spanning domains, two Asn‐Pro‐Ala (NPA) motifs, and five amino acid residues characteristic of aquaglyceroporins. Functional characterization after heterologous expression of HC‐9 cRNA in Xenopus laevis oocytes indicated that HC‐9 facilitates glycerol and water permeability and is partially inhibited by 0.5 mmol/L phloretin or 0.3 mmol/L HgCl2. HC‐9 mRNA (qPCR) and protein (immunoblot) were expressed in most treefrog tissues analyzed (muscle, liver, bladder, stomach, kidney, dorsal skin, and ventral skin) except the protein fraction of red blood cells. Contrary to our prediction, both mRNA and protein expression were either unchanged or downregulated in most tissues in response to cold, freezing, and thawing. A notable exception to that pattern occurred in liver, where protein expression was significantly elevated in frozen (~4‐fold over warm) and thawed (~6‐fold over warm) conditions. Immunofluorescence labeling of HC‐9 protein revealed a signal that appeared to be localized to the plasma membrane of hepatocytes. Our results indicate that gray treefrogs express an AQP9‐like protein that facilitates glycerol permeability. Both the transcriptional and translational levels of HC‐9 change in response to thermal challenges, with a unique increase in liver during freezing and thawing.
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Affiliation(s)
- Brian Stogsdill
- Department of Biological Sciences, Wright State University, Dayton, Ohio
| | - James Frisbie
- Department of Biological Sciences, Wright State University, Dayton, Ohio
| | | | - David L Goldstein
- Department of Biological Sciences, Wright State University, Dayton, Ohio
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Kapilan R, Vaziri M, Zwiazek JJ. Regulation of aquaporins in plants under stress. Biol Res 2018; 51:4. [PMID: 29338771 PMCID: PMC5769316 DOI: 10.1186/s40659-018-0152-0] [Citation(s) in RCA: 176] [Impact Index Per Article: 29.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/10/2015] [Accepted: 01/11/2018] [Indexed: 01/16/2023] Open
Abstract
Aquaporins (AQP) are channel proteins belonging to the Major Intrinsic Protein (MIP) superfamily that play an important role in plant water relations. The main role of aquaporins in plants is transport of water and other small neutral molecules across cellular biological membranes. AQPs have remarkable features to provide an efficient and often, specific water flow and enable them to transport water into and out of the cells along the water potential gradient. Plant AQPs are classified into five main subfamilies including the plasma membrane intrinsic proteins (PIPs), tonoplast intrinsic proteins (TIPs), nodulin 26 like intrinsic proteins (NIPs), small basic intrinsic proteins (SIPs) and X intrinsic proteins (XIPs). AQPs are localized in the cell membranes and are found in all living cells. However, most of the AQPs that have been described in plants are localized to the tonoplast and plasma membranes. Regulation of AQP activity and gene expression, are also considered as a part of the adaptation mechanisms to stress conditions and rely on complex processes and signaling pathways as well as complex transcriptional, translational and posttranscriptional factors. Gating of AQPs through different mechanisms, such as phosphorylation, tetramerization, pH, cations, reactive oxygen species, phytohormones and other chemical agents, may play a key role in plant responses to environmental stresses by maintaining the uptake and movement of water in the plant body.
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Affiliation(s)
| | - Maryam Vaziri
- Department of Renewable Resources, University of Alberta, Edmonton, AB, Canada
| | - Janusz J Zwiazek
- Department of Renewable Resources, University of Alberta, Edmonton, AB, Canada
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Groszmann M, Osborn HL, Evans JR. Carbon dioxide and water transport through plant aquaporins. PLANT, CELL & ENVIRONMENT 2017; 40:938-961. [PMID: 27739588 DOI: 10.1111/pce.12844] [Citation(s) in RCA: 73] [Impact Index Per Article: 10.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/19/2016] [Revised: 09/01/2016] [Accepted: 09/22/2016] [Indexed: 05/25/2023]
Abstract
Aquaporins are channel proteins that function to increase the permeability of biological membranes. In plants, aquaporins are encoded by multigene families that have undergone substantial diversification in land plants. The plasma membrane intrinsic proteins (PIPs) subfamily of aquaporins is of particular interest given their potential to improve plant water relations and photosynthesis. Flowering plants have between 7 and 28 PIP genes. Their expression varies with tissue and cell type, through development and in response to a variety of factors, contributing to the dynamic and tissue specific control of permeability. There are a growing number of PIPs shown to act as water channels, but those altering membrane permeability to CO2 are more limited. The structural basis for selective substrate specificities has not yet been resolved, although a few key amino acid positions have been identified. Several regions important for dimerization, gating and trafficking are also known. PIP aquaporins assemble as tetramers and their properties depend on the monomeric composition. PIPs control water flux into and out of veins and stomatal guard cells and also increase membrane permeability to CO2 in mesophyll and stomatal guard cells. The latter increases the effectiveness of Rubisco and can potentially influence transpiration efficiency.
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Affiliation(s)
- Michael Groszmann
- Australian Research Council Centre of Excellence for Translational Photosynthesis, Division of Plant Sciences, Research School of Biology, The Australian National University, Acton, ACT, 2601, Australia
| | - Hannah L Osborn
- Australian Research Council Centre of Excellence for Translational Photosynthesis, Division of Plant Sciences, Research School of Biology, The Australian National University, Acton, ACT, 2601, Australia
| | - John R Evans
- Australian Research Council Centre of Excellence for Translational Photosynthesis, Division of Plant Sciences, Research School of Biology, The Australian National University, Acton, ACT, 2601, Australia
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Ishikawa-Sakurai J, Murai-Hatano M, Hayashi H, Matsunami M, Kuwagata T. Rice aquaporins and their responses to environmental stress. ACTA ACUST UNITED AC 2017. [DOI: 10.3117/rootres.26.39] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Affiliation(s)
- Junko Ishikawa-Sakurai
- Tohoku Agricultural Research Center, NARO
- Institute of Crop Science, NARO
- United Graduate School of Agricultural Sciences, Iwate University
| | | | - Hidehiro Hayashi
- Tohoku Agricultural Research Center, NARO
- United Graduate School of Agricultural Sciences, Iwate University
| | - Maya Matsunami
- Tohoku Agricultural Research Center, NARO
- JSPS Research Fellow
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Song J, Ye G, Qian Z, Ye Q. Virus-induced plasma membrane aquaporin PsPIP2;1 silencing inhibits plant water transport of Pisum sativum. BOTANICAL STUDIES 2016; 57:15. [PMID: 28597425 PMCID: PMC5430582 DOI: 10.1186/s40529-016-0135-9] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/02/2016] [Accepted: 07/13/2016] [Indexed: 05/29/2023]
Abstract
BACKGROUND Aquaporins (AQPs) are known to facilitate water transport across cell membranes, but the role of a single AQP in regulating plant water transport, particularly in plants other than Arabidopsis remains largely unexplored. In the present study, a virus-induced gene silencing (VIGS) technique was employed to suppress the expression of a specific plasma membrane aquaporin PsPIP2;1 of Pea plants (Pisum sativum), and subsequent effects of the gene suppression on root hydraulic conductivity (Lpr), leaf hydraulic conductivity (K leaf ), root cell hydraulic conductivity (Lprc), and leaf cell hydraulic conductivity (Lplc) were investigated, using hydroponically grown Pea plants. RESULTS Compared with control plants, VIGS-PsPIP2;1 plants displayed a significant suppression of PsPIP2;1 in both roots and leaves, while the expression of other four PIP isoforms (PsPIP1;1, PsPIP1;2, PsPIP2;2, and PsPIP2;3) that were simultaneously monitored were not altered. As a consequence, significant declines in water transport of VIGS-PsPIP2;1 plants were observed at both organ and cell levels, i.e., as compared to control plants, Lpr and K leaf were reduced by 29 %, and Lprc and Lplc were reduced by 20 and 29 %, respectively. CONCLUSION Our results demonstrate that PsPIP2;1 alone contributes substantially to root and leaf water transport in Pea plants, and highlight VIGS a useful tool for investigating the role of a single AQP in regulating plant water transport.
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Affiliation(s)
- Juanjuan Song
- Key Laboratory of Vegetation Restoration and Management of Degraded Ecosystems, South China Botanical Garden, Chinese Academy of Sciences, 723 Xingke Road, Tianhe District, Guangzhou, 510650 China
- Guangdong Provincial Key Laboratory of Applied Botany, South China Botanical Garden, Chinese Academy of Sciences, 723 Xingke Road, Tianhe District, Guangzhou, 510650 Guangdong China
| | - Guoliang Ye
- Key Laboratory of Vegetation Restoration and Management of Degraded Ecosystems, South China Botanical Garden, Chinese Academy of Sciences, 723 Xingke Road, Tianhe District, Guangzhou, 510650 China
- University of Chinese Academy of Sciences, 19A Yuquan Road, Beijing, 100049 China
| | - Zhengjiang Qian
- Key Laboratory of Vegetation Restoration and Management of Degraded Ecosystems, South China Botanical Garden, Chinese Academy of Sciences, 723 Xingke Road, Tianhe District, Guangzhou, 510650 China
- University of Chinese Academy of Sciences, 19A Yuquan Road, Beijing, 100049 China
| | - Qing Ye
- Key Laboratory of Vegetation Restoration and Management of Degraded Ecosystems, South China Botanical Garden, Chinese Academy of Sciences, 723 Xingke Road, Tianhe District, Guangzhou, 510650 China
- Guangdong Provincial Key Laboratory of Applied Botany, South China Botanical Garden, Chinese Academy of Sciences, 723 Xingke Road, Tianhe District, Guangzhou, 510650 Guangdong China
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Schmidt R, Kunkowska AB, Schippers JHM. Role of Reactive Oxygen Species during Cell Expansion in Leaves. PLANT PHYSIOLOGY 2016; 172:2098-2106. [PMID: 27794099 PMCID: PMC5129704 DOI: 10.1104/pp.16.00426] [Citation(s) in RCA: 63] [Impact Index Per Article: 7.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/31/2016] [Accepted: 10/25/2016] [Indexed: 05/18/2023]
Abstract
Reactive oxygen species as potent regulators of leaf development poses special interest for cell expansion.
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Affiliation(s)
- Romy Schmidt
- Institute of Biology I, RWTH Aachen University, Worringerweg 1, 52074 Aachen, Germany
| | - Alicja B Kunkowska
- Institute of Biology I, RWTH Aachen University, Worringerweg 1, 52074 Aachen, Germany
| | - Jos H M Schippers
- Institute of Biology I, RWTH Aachen University, Worringerweg 1, 52074 Aachen, Germany
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Vitali M, Cochard H, Gambino G, Ponomarenko A, Perrone I, Lovisolo C. VvPIP2;4N aquaporin involvement in controlling leaf hydraulic capacitance and resistance in grapevine. PHYSIOLOGIA PLANTARUM 2016; 158:284-296. [PMID: 27137520 DOI: 10.1111/ppl.12463] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/02/2016] [Revised: 03/10/2016] [Accepted: 03/21/2016] [Indexed: 05/02/2023]
Abstract
Hydraulic capacitance (C) in a plant tissue buffers the xylem tension, storing and releasing water and has been highlighted in recent years as an important factor that affects water relations such as drought tolerance and embolism formation. Aquaporins (AQPs) are well known to control leaf hydraulic resistance (Rh) but their role in the control of C is unknown. Here, we assess Rh and C on detached grapevines wild-type (WT) (cv. Brachetto) leaves and over-expressing the aquaporin gene VvPIP2;4N (OE). For this purpose, we developed a new method inspired from the pressure-volume curve technique and the rehydration-kinetic-method, which allowed us to monitor the dynamics of dehydration and rehydration in the same leaf. The recovery after dehydration was measured in dark, light non-transpirative conditions, light-transpirative conditions and light-transpirative condition adding abscisic acid. Pressurizing to dehydrate leaves in the OE line, the recorded Rh and C were respectively lower and higher than those in the WT. The same results were obtained in the dark recovery by rehydration treatment. In the presence of light, either when leaves transpired or not (by depressing vapor pressure deficit), the described effects disappeared. The change in Rh and C did not affect the kinetics of desiccation of detached leaves in dark in air, in OE plants compared to WT ones. Our study highlighted that both Rh and C were influenced by the constitutive over-expression of VvPIP2;4N. The effect of AQPs on C is reported here for the first time and may involve a modulation of cell reflection coefficient.
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Affiliation(s)
- Marco Vitali
- Department of Agricultural, Forest and Food Sciences (DISAFA), University of Turin, Grugliasco, 10095, Italy.
| | - Hervé Cochard
- INRA, UMR 547 PIAF, Clermont-Ferrand, F-63100, France
- UMR 547 PIAF, University Blaise Pascal, Aubière, F-63177, France
| | - Giorgio Gambino
- Institute for Sustainable Plant Protection, National Research Council (IPSP-CNR), Grugliasco, 10095, Italy
| | | | - Irene Perrone
- Institute for Sustainable Plant Protection, National Research Council (IPSP-CNR), Grugliasco, 10095, Italy
| | - Claudio Lovisolo
- Department of Agricultural, Forest and Food Sciences (DISAFA), University of Turin, Grugliasco, 10095, Italy
- INRA, UMR 547 PIAF, Clermont-Ferrand, F-63100, France
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Zhuo C, Wang T, Guo Z, Lu S. Overexpression of MfPIP2-7 from Medicago falcata promotes cold tolerance and growth under NO3 (-) deficiency in transgenic tobacco plants. BMC PLANT BIOLOGY 2016; 16:138. [PMID: 27301445 PMCID: PMC4907284 DOI: 10.1186/s12870-016-0814-4] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/01/2015] [Accepted: 05/19/2016] [Indexed: 05/14/2023]
Abstract
BACKGROUND Plasma membrane intrinsic proteins (PIPs), which belong to aquaporins (AQPs) superfamily, are subdivided into two groups, PIP1 and PIP2, based on sequence similarity. Several PIP2s function as water channels, while PIP1s have low or no water channel activity, but have a role in water permeability through interacting with PIP2. A cold responsive PIP2 named as MfPIP2-7 was isolated from Medicago falcata (hereafter falcata), a forage legume with great cold tolerance, and transgenic tobacco plants overexpressing MfPIP2-7 were analyzed in tolerance to multiple stresses including freezing, chilling, and nitrate reduction in this study. RESULTS MfPIP2-7 transcript was induced by 4 to 12 h of cold treatment and 2 h of abscisic acid (ABA) treatment. Pretreatment with inhibitor of ABA synthesis blocked the cold induced MfPIP2-7 transcript, indicating that ABA was involved in cold induced transcription of MfPIP2-7 in falcata. Overexpression of MfPIP2-7 resulted in enhanced tolerance to freezing, chilling and NO3 (-) deficiency in transgenic tobacco (Nicotiana tabacum L.) plants as compared with the wild type. Moreover, MfPIP2-7 was demonstrated to facilitate H2O2 diffusion in yeast. Higher transcript levels of several stress responsive genes, such as NtERD10B, NtERD10C, NtDREB1, and 2, and nitrate reductase (NR) encoding genes (NtNIA1, and NtNIA2) were observed in transgenic plants as compared with the wild type with dependence upon H2O2. In addition, NR activity was increased in transgenic plants, which led to alterations in free amino acid components and concentrations. CONCLUSIONS The results suggest that MfPIP2-7 plays an important role in plant tolerance to freezing, chilling, and NO3 (-) deficiency by promoted H2O2 diffusion that in turn up-regulates expression of NIAs and multiple stress responsive genes.
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Affiliation(s)
- Chunliu Zhuo
- State Key Laboratory for Conservation and Utilization of Subtropical Agro-bioresources, Guangdong Engineering Research Center for Grassland Science, College of Life Sciences, South China Agricultural University, Guangzhou, 510642, China
| | - Ting Wang
- State Key Laboratory for Conservation and Utilization of Subtropical Agro-bioresources, Guangdong Engineering Research Center for Grassland Science, College of Life Sciences, South China Agricultural University, Guangzhou, 510642, China
| | - Zhenfei Guo
- State Key Laboratory for Conservation and Utilization of Subtropical Agro-bioresources, Guangdong Engineering Research Center for Grassland Science, College of Life Sciences, South China Agricultural University, Guangzhou, 510642, China.
- College of Grassland Science, Nanjing Agricultural University, Nanjing, 210095, China.
| | - Shaoyun Lu
- State Key Laboratory for Conservation and Utilization of Subtropical Agro-bioresources, Guangdong Engineering Research Center for Grassland Science, College of Life Sciences, South China Agricultural University, Guangzhou, 510642, China.
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Kooke R, Kruijer W, Bours R, Becker F, Kuhn A, van de Geest H, Buntjer J, Doeswijk T, Guerra J, Bouwmeester H, Vreugdenhil D, Keurentjes JJB. Genome-Wide Association Mapping and Genomic Prediction Elucidate the Genetic Architecture of Morphological Traits in Arabidopsis. PLANT PHYSIOLOGY 2016; 170:2187-203. [PMID: 26869705 PMCID: PMC4825126 DOI: 10.1104/pp.15.00997] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/30/2015] [Accepted: 02/11/2016] [Indexed: 05/05/2023]
Abstract
Quantitative traits in plants are controlled by a large number of genes and their interaction with the environment. To disentangle the genetic architecture of such traits, natural variation within species can be explored by studying genotype-phenotype relationships. Genome-wide association studies that link phenotypes to thousands of single nucleotide polymorphism markers are nowadays common practice for such analyses. In many cases, however, the identified individual loci cannot fully explain the heritability estimates, suggesting missing heritability. We analyzed 349 Arabidopsis accessions and found extensive variation and high heritabilities for different morphological traits. The number of significant genome-wide associations was, however, very low. The application of genomic prediction models that take into account the effects of all individual loci may greatly enhance the elucidation of the genetic architecture of quantitative traits in plants. Here, genomic prediction models revealed different genetic architectures for the morphological traits. Integrating genomic prediction and association mapping enabled the assignment of many plausible candidate genes explaining the observed variation. These genes were analyzed for functional and sequence diversity, and good indications that natural allelic variation in many of these genes contributes to phenotypic variation were obtained. For ACS11, an ethylene biosynthesis gene, haplotype differences explaining variation in the ratio of petiole and leaf length could be identified.
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Affiliation(s)
- Rik Kooke
- Laboratory of Plant Physiology, Wageningen University, Droevendaalsesteeg 1, 6708 PB Wageningen, the Netherlands (R.K., R.B., A.K., H.B., D.V.); Laboratory of Genetics, Wageningen University, Droevendaalsesteeg 1, 6708 PB Wageningen, the Netherlands (R.K., F.B., J.J.B.K.); Centre for Biosystems Genomics, Wageningen Campus, Droevendaalsesteeg 1, 6708 PB Wageningen, the Netherlands (R.K., H.v.d.G., D.V., J.J.B.K); Biometris, Wageningen University, Droevendaalsesteeg 1, 6708 PB Wageningen, the Netherlands (W.K.); PRI Bioinformatics, Wageningen University, Droevendaalsesteeg 1, 6708 PB Wageningen, the Netherlands (H.v.d.G.); and Keygene, Agro Business Park 90, 6708 PW Wageningen, the Netherlands (J.B., T.D., J.G.)
| | - Willem Kruijer
- Laboratory of Plant Physiology, Wageningen University, Droevendaalsesteeg 1, 6708 PB Wageningen, the Netherlands (R.K., R.B., A.K., H.B., D.V.); Laboratory of Genetics, Wageningen University, Droevendaalsesteeg 1, 6708 PB Wageningen, the Netherlands (R.K., F.B., J.J.B.K.); Centre for Biosystems Genomics, Wageningen Campus, Droevendaalsesteeg 1, 6708 PB Wageningen, the Netherlands (R.K., H.v.d.G., D.V., J.J.B.K); Biometris, Wageningen University, Droevendaalsesteeg 1, 6708 PB Wageningen, the Netherlands (W.K.); PRI Bioinformatics, Wageningen University, Droevendaalsesteeg 1, 6708 PB Wageningen, the Netherlands (H.v.d.G.); and Keygene, Agro Business Park 90, 6708 PW Wageningen, the Netherlands (J.B., T.D., J.G.)
| | - Ralph Bours
- Laboratory of Plant Physiology, Wageningen University, Droevendaalsesteeg 1, 6708 PB Wageningen, the Netherlands (R.K., R.B., A.K., H.B., D.V.); Laboratory of Genetics, Wageningen University, Droevendaalsesteeg 1, 6708 PB Wageningen, the Netherlands (R.K., F.B., J.J.B.K.); Centre for Biosystems Genomics, Wageningen Campus, Droevendaalsesteeg 1, 6708 PB Wageningen, the Netherlands (R.K., H.v.d.G., D.V., J.J.B.K); Biometris, Wageningen University, Droevendaalsesteeg 1, 6708 PB Wageningen, the Netherlands (W.K.); PRI Bioinformatics, Wageningen University, Droevendaalsesteeg 1, 6708 PB Wageningen, the Netherlands (H.v.d.G.); and Keygene, Agro Business Park 90, 6708 PW Wageningen, the Netherlands (J.B., T.D., J.G.)
| | - Frank Becker
- Laboratory of Plant Physiology, Wageningen University, Droevendaalsesteeg 1, 6708 PB Wageningen, the Netherlands (R.K., R.B., A.K., H.B., D.V.); Laboratory of Genetics, Wageningen University, Droevendaalsesteeg 1, 6708 PB Wageningen, the Netherlands (R.K., F.B., J.J.B.K.); Centre for Biosystems Genomics, Wageningen Campus, Droevendaalsesteeg 1, 6708 PB Wageningen, the Netherlands (R.K., H.v.d.G., D.V., J.J.B.K); Biometris, Wageningen University, Droevendaalsesteeg 1, 6708 PB Wageningen, the Netherlands (W.K.); PRI Bioinformatics, Wageningen University, Droevendaalsesteeg 1, 6708 PB Wageningen, the Netherlands (H.v.d.G.); and Keygene, Agro Business Park 90, 6708 PW Wageningen, the Netherlands (J.B., T.D., J.G.)
| | - André Kuhn
- Laboratory of Plant Physiology, Wageningen University, Droevendaalsesteeg 1, 6708 PB Wageningen, the Netherlands (R.K., R.B., A.K., H.B., D.V.); Laboratory of Genetics, Wageningen University, Droevendaalsesteeg 1, 6708 PB Wageningen, the Netherlands (R.K., F.B., J.J.B.K.); Centre for Biosystems Genomics, Wageningen Campus, Droevendaalsesteeg 1, 6708 PB Wageningen, the Netherlands (R.K., H.v.d.G., D.V., J.J.B.K); Biometris, Wageningen University, Droevendaalsesteeg 1, 6708 PB Wageningen, the Netherlands (W.K.); PRI Bioinformatics, Wageningen University, Droevendaalsesteeg 1, 6708 PB Wageningen, the Netherlands (H.v.d.G.); and Keygene, Agro Business Park 90, 6708 PW Wageningen, the Netherlands (J.B., T.D., J.G.)
| | - Henri van de Geest
- Laboratory of Plant Physiology, Wageningen University, Droevendaalsesteeg 1, 6708 PB Wageningen, the Netherlands (R.K., R.B., A.K., H.B., D.V.); Laboratory of Genetics, Wageningen University, Droevendaalsesteeg 1, 6708 PB Wageningen, the Netherlands (R.K., F.B., J.J.B.K.); Centre for Biosystems Genomics, Wageningen Campus, Droevendaalsesteeg 1, 6708 PB Wageningen, the Netherlands (R.K., H.v.d.G., D.V., J.J.B.K); Biometris, Wageningen University, Droevendaalsesteeg 1, 6708 PB Wageningen, the Netherlands (W.K.); PRI Bioinformatics, Wageningen University, Droevendaalsesteeg 1, 6708 PB Wageningen, the Netherlands (H.v.d.G.); and Keygene, Agro Business Park 90, 6708 PW Wageningen, the Netherlands (J.B., T.D., J.G.)
| | - Jaap Buntjer
- Laboratory of Plant Physiology, Wageningen University, Droevendaalsesteeg 1, 6708 PB Wageningen, the Netherlands (R.K., R.B., A.K., H.B., D.V.); Laboratory of Genetics, Wageningen University, Droevendaalsesteeg 1, 6708 PB Wageningen, the Netherlands (R.K., F.B., J.J.B.K.); Centre for Biosystems Genomics, Wageningen Campus, Droevendaalsesteeg 1, 6708 PB Wageningen, the Netherlands (R.K., H.v.d.G., D.V., J.J.B.K); Biometris, Wageningen University, Droevendaalsesteeg 1, 6708 PB Wageningen, the Netherlands (W.K.); PRI Bioinformatics, Wageningen University, Droevendaalsesteeg 1, 6708 PB Wageningen, the Netherlands (H.v.d.G.); and Keygene, Agro Business Park 90, 6708 PW Wageningen, the Netherlands (J.B., T.D., J.G.)
| | - Timo Doeswijk
- Laboratory of Plant Physiology, Wageningen University, Droevendaalsesteeg 1, 6708 PB Wageningen, the Netherlands (R.K., R.B., A.K., H.B., D.V.); Laboratory of Genetics, Wageningen University, Droevendaalsesteeg 1, 6708 PB Wageningen, the Netherlands (R.K., F.B., J.J.B.K.); Centre for Biosystems Genomics, Wageningen Campus, Droevendaalsesteeg 1, 6708 PB Wageningen, the Netherlands (R.K., H.v.d.G., D.V., J.J.B.K); Biometris, Wageningen University, Droevendaalsesteeg 1, 6708 PB Wageningen, the Netherlands (W.K.); PRI Bioinformatics, Wageningen University, Droevendaalsesteeg 1, 6708 PB Wageningen, the Netherlands (H.v.d.G.); and Keygene, Agro Business Park 90, 6708 PW Wageningen, the Netherlands (J.B., T.D., J.G.)
| | - José Guerra
- Laboratory of Plant Physiology, Wageningen University, Droevendaalsesteeg 1, 6708 PB Wageningen, the Netherlands (R.K., R.B., A.K., H.B., D.V.); Laboratory of Genetics, Wageningen University, Droevendaalsesteeg 1, 6708 PB Wageningen, the Netherlands (R.K., F.B., J.J.B.K.); Centre for Biosystems Genomics, Wageningen Campus, Droevendaalsesteeg 1, 6708 PB Wageningen, the Netherlands (R.K., H.v.d.G., D.V., J.J.B.K); Biometris, Wageningen University, Droevendaalsesteeg 1, 6708 PB Wageningen, the Netherlands (W.K.); PRI Bioinformatics, Wageningen University, Droevendaalsesteeg 1, 6708 PB Wageningen, the Netherlands (H.v.d.G.); and Keygene, Agro Business Park 90, 6708 PW Wageningen, the Netherlands (J.B., T.D., J.G.)
| | - Harro Bouwmeester
- Laboratory of Plant Physiology, Wageningen University, Droevendaalsesteeg 1, 6708 PB Wageningen, the Netherlands (R.K., R.B., A.K., H.B., D.V.); Laboratory of Genetics, Wageningen University, Droevendaalsesteeg 1, 6708 PB Wageningen, the Netherlands (R.K., F.B., J.J.B.K.); Centre for Biosystems Genomics, Wageningen Campus, Droevendaalsesteeg 1, 6708 PB Wageningen, the Netherlands (R.K., H.v.d.G., D.V., J.J.B.K); Biometris, Wageningen University, Droevendaalsesteeg 1, 6708 PB Wageningen, the Netherlands (W.K.); PRI Bioinformatics, Wageningen University, Droevendaalsesteeg 1, 6708 PB Wageningen, the Netherlands (H.v.d.G.); and Keygene, Agro Business Park 90, 6708 PW Wageningen, the Netherlands (J.B., T.D., J.G.)
| | - Dick Vreugdenhil
- Laboratory of Plant Physiology, Wageningen University, Droevendaalsesteeg 1, 6708 PB Wageningen, the Netherlands (R.K., R.B., A.K., H.B., D.V.); Laboratory of Genetics, Wageningen University, Droevendaalsesteeg 1, 6708 PB Wageningen, the Netherlands (R.K., F.B., J.J.B.K.); Centre for Biosystems Genomics, Wageningen Campus, Droevendaalsesteeg 1, 6708 PB Wageningen, the Netherlands (R.K., H.v.d.G., D.V., J.J.B.K); Biometris, Wageningen University, Droevendaalsesteeg 1, 6708 PB Wageningen, the Netherlands (W.K.); PRI Bioinformatics, Wageningen University, Droevendaalsesteeg 1, 6708 PB Wageningen, the Netherlands (H.v.d.G.); and Keygene, Agro Business Park 90, 6708 PW Wageningen, the Netherlands (J.B., T.D., J.G.)
| | - Joost J B Keurentjes
- Laboratory of Plant Physiology, Wageningen University, Droevendaalsesteeg 1, 6708 PB Wageningen, the Netherlands (R.K., R.B., A.K., H.B., D.V.); Laboratory of Genetics, Wageningen University, Droevendaalsesteeg 1, 6708 PB Wageningen, the Netherlands (R.K., F.B., J.J.B.K.); Centre for Biosystems Genomics, Wageningen Campus, Droevendaalsesteeg 1, 6708 PB Wageningen, the Netherlands (R.K., H.v.d.G., D.V., J.J.B.K); Biometris, Wageningen University, Droevendaalsesteeg 1, 6708 PB Wageningen, the Netherlands (W.K.); PRI Bioinformatics, Wageningen University, Droevendaalsesteeg 1, 6708 PB Wageningen, the Netherlands (H.v.d.G.); and Keygene, Agro Business Park 90, 6708 PW Wageningen, the Netherlands (J.B., T.D., J.G.)
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Ranganathan K, El Kayal W, Cooke JEK, Zwiazek JJ. Responses of hybrid aspen over-expressing a PIP2;5 aquaporin to low root temperature. JOURNAL OF PLANT PHYSIOLOGY 2016; 192:98-104. [PMID: 26895330 DOI: 10.1016/j.jplph.2016.02.001] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/01/2015] [Revised: 02/03/2016] [Accepted: 02/03/2016] [Indexed: 06/05/2023]
Abstract
Aquaporins mediate the movement of water across cell membranes. Plasma membrane intrinsic protein 2;5 from Populus trichocarpa×deltoides (PtdPIP2;5) was previously demonstrated to be a functionally important water conducting aquaporin. To study the relevance of aquaporin-mediated root water transport at low temperatures, we generated transgenic Populus tremula×alba over-expressing PtdPIP2;5 under control of the maize ubiquitin promoter, and compared the physiological responses and water transport properties of the PtdPIP2;5 over-expressing lines (PtdPIP2;5ox) with wild-type plants. We hypothesized that over-expression of PtdPIP2;5 would reduce temperature sensitivity of root water transport and gas exchange. Decreasing root temperatures to 10 and 5°C significantly decreased hydraulic conductivities (Lp) in wild-type plants, but had no significant effect on Lp in PtdPIP2;5ox plants. Recovery of Lp in the transgenic lines returned to 20°C from 5°C was faster than in the wild-type plants. Low root temperature did not induce major changes in transcript levels for other PIPs. When roots were exposed to 5°C in solution culture and shoots were exposed to 20°C, wild-type plants had significantly lower net photosynthetic and transpiration rates compared to PtdPIP2;5ox plants. Taken together, our results demonstrate that over-expression of PtdPIP2;5 in P. tremula×alba was effective in alleviating the effects of low root temperature on Lp and gas exchange.
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Affiliation(s)
- Kapilan Ranganathan
- Department of Renewable Resources, University of Alberta, Edmonton, AB, Canada
| | - Walid El Kayal
- Department of Biological Sciences, University of Alberta, Edmonton, AB, Canada
| | - Janice E K Cooke
- Department of Biological Sciences, University of Alberta, Edmonton, AB, Canada
| | - Janusz J Zwiazek
- Department of Renewable Resources, University of Alberta, Edmonton, AB, Canada.
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Ariani A, Francini A, Andreucci A, Sebastiani L. Over-expression of AQUA1 in Populus alba Villafranca clone increases relative growth rate and water use efficiency, under Zn excess condition. PLANT CELL REPORTS 2016; 35:289-301. [PMID: 26518428 DOI: 10.1007/s00299-015-1883-9] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/22/2015] [Revised: 09/01/2015] [Accepted: 10/12/2015] [Indexed: 05/04/2023]
Abstract
Transgenic Populus alba over-expressing a TIP aquaporin ( aqua1) showed a higher growth rate under Zn excess, suggesting that aqua1 could be involved in water homeostasis, rather than in Zn homeostasis. Populus is the internationally accepted model for physiological and developmental studies of tree traits under stress. In plants, aquaporins facilitate and regulate the diffusion of water, however, few poplar aquaporins have been characterized to date. In this study, we reported for the first time an in vivo characterization of Populus alba clone Villafranca transgenic plants over-expressing a TIP aquaporin (aqua1) of P. x euramericana clone I-214. An AQUA1:GFP chimeric construct, over-expressed in P. alba Villafranca clones, shows a cytoplasmic localization in roots, and it localizes in guard cells in leaves. When over-expressed in transgenic plants, aqua1 confers a higher growth rate compared to wild-type (wt) plants, without affecting chlorophyll accumulation, relative water content (RWC), and fluorescence performances, but increasing the intrinsic Transpiration Efficiency. In response to Zn (1 mM), transgenic lines did not show a significant increase in Zn accumulation as compared to wt plants, even though the over-expression of this gene confers higher tolerance in root tissues. These results suggest that, in poplar plants, this gene could be principally involved in regulation of water homeostasis and biomass production, rather than in Zn homeostasis.
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Affiliation(s)
- Andrea Ariani
- BioLabs, Institute of Life Sciences, Scuola Superiore Sant'Anna, Piazza Martiri della Libertà, 33, 56127, Pisa, Italy.
- Department of Plant Sciences/MS1, University of California, 1 Shields Avenue, Davis, CA, 95616-8780, USA.
| | - Alessandra Francini
- BioLabs, Institute of Life Sciences, Scuola Superiore Sant'Anna, Piazza Martiri della Libertà, 33, 56127, Pisa, Italy.
| | - Andrea Andreucci
- Department of Biology, University of Pisa, V. L. Ghini 13, 56126, Pisa, Italy.
| | - Luca Sebastiani
- BioLabs, Institute of Life Sciences, Scuola Superiore Sant'Anna, Piazza Martiri della Libertà, 33, 56127, Pisa, Italy.
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Sánchez-Romera B, Ruiz-Lozano JM, Zamarreño ÁM, García-Mina JM, Aroca R. Arbuscular mycorrhizal symbiosis and methyl jasmonate avoid the inhibition of root hydraulic conductivity caused by drought. MYCORRHIZA 2016; 26:111-22. [PMID: 26070449 DOI: 10.1007/s00572-015-0650-7] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/18/2015] [Accepted: 06/01/2015] [Indexed: 05/08/2023]
Abstract
Hormonal regulation and symbiotic relationships provide benefits for plants to overcome stress conditions. The aim of this study was to elucidate the effects of exogenous methyl jasmonate (MeJA) application on root hydraulic conductivity (L) of Phaseolus vulgaris plants which established arbuscular mycorrhizal (AM) symbiosis under two water regimes (well-watered and drought conditions). The variation in endogenous contents of several hormones (MeJA, JA, abscisic acid (ABA), indol-3-acetic acid (IAA), salicylic acid (SA)) and the changes in aquaporin gene expression, protein abundance and phosphorylation state were analyzed. AM symbiosis decreased L under well-watered conditions, which was partially reverted by the MeJA treatment, apparently by a drop in root IAA contents. Also, AM symbiosis and MeJA prevented inhibition of L under drought conditions, most probably by a reduction in root SA contents. Additionally, the gene expression of two fungal aquaporins was upregulated under drought conditions, independently of the MeJA treatment. Plant aquaporin gene expression could not explain the behaviour of L. Conversely, evidence was found for the control of L by phosphorylation of aquaporins. Hence, MeJA addition modified the response of L to both AM symbiosis and drought, presumably by regulating the root contents of IAA and SA and the phosphorylation state of aquaporins.
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Affiliation(s)
- Beatriz Sánchez-Romera
- Department of Soil Microbiology and Symbiotic Systems, Estación Experimental del Zaidín (CSIC), C/ Profesor Albareda 1, 18008, Granada, Spain
| | - Juan Manuel Ruiz-Lozano
- Department of Soil Microbiology and Symbiotic Systems, Estación Experimental del Zaidín (CSIC), C/ Profesor Albareda 1, 18008, Granada, Spain
| | - Ángel María Zamarreño
- CIPAV TimacAGRO International-Roullier Group, Polígono Arazuri-Orcoyen, c/C no. 32, 31160, Orcoyen, Navarra, Spain
| | - José María García-Mina
- CIPAV TimacAGRO International-Roullier Group, Polígono Arazuri-Orcoyen, c/C no. 32, 31160, Orcoyen, Navarra, Spain
| | - Ricardo Aroca
- Department of Soil Microbiology and Symbiotic Systems, Estación Experimental del Zaidín (CSIC), C/ Profesor Albareda 1, 18008, Granada, Spain.
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Nagler M, Nukarinen E, Weckwerth W, Nägele T. Integrative molecular profiling indicates a central role of transitory starch breakdown in establishing a stable C/N homeostasis during cold acclimation in two natural accessions of Arabidopsis thaliana. BMC PLANT BIOLOGY 2015; 15:284. [PMID: 26628055 PMCID: PMC4667452 DOI: 10.1186/s12870-015-0668-1] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/16/2015] [Accepted: 11/23/2015] [Indexed: 05/21/2023]
Abstract
BACKGROUND The variation of growth and cold tolerance of two natural Arabidopsis accessions, Cvi (cold sensitive) and Rschew (cold tolerant), was analysed on a proteomic, phosphoproteomic and metabolomic level to derive characteristic information about genotypically distinct strategies of metabolic reprogramming and growth maintenance during cold acclimation. RESULTS Growth regulation before and after a cold acclimation period was monitored by recording fresh weight of leaf rosettes. Significant differences in the shoot fresh weight of Cvi and Rschew were detected both before and after acclimation to low temperature. During cold acclimation, starch levels were found to accumulate to a significantly higher level in Cvi compared to Rschew. Concomitantly, statistical analysis revealed a cold-induced decrease of beta-amylase 3 (BAM3; AT4G17090) in Cvi but not in Rschew. Further, only in Rschew we observed an increase of the protein level of the debranching enzyme isoamylase 3 (ISA3; AT4G09020). Additionally, the cold response of both accessions was observed to severely affect ribosomal complexes, but only Rschew showed a pronounced accumulation of carbon and nitrogen compounds. The abundance of the Cold Regulated (COR) protein COR78 (AT5G52310) as well as its phosphorylation was observed to be positively correlated with the acclimation state of both accessions. In addition, transcription factors being involved in growth and developmental regulation were found to characteristically separate the cold sensitive from the cold tolerant accession. Predicted protein-protein interaction networks (PPIN) of significantly changed proteins during cold acclimation allowed for a differentiation between both accessions. The PPIN revealed the central role of carbon/nitrogen allocation and ribosomal complex formation to establish a new cold-induced metabolic homeostasis as also observed on the level of the metabolome and proteome. CONCLUSION Our results provide evidence for a comprehensive multi-functional molecular interaction network orchestrating growth regulation and cold acclimation in two natural accessions of Arabidopsis thaliana. The differential abundance of beta-amylase 3 and isoamylase 3 indicates a central role of transitory starch degradation in the coordination of growth regulation and the development of stress tolerance. Finally, our study indicates naturally occurring differential patterns of C/N balance and protein synthesis during cold acclimation.
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Affiliation(s)
- Matthias Nagler
- Department of Ecogenomics and Systems Biology, University of Vienna, Althanstr. 14, 1090, Vienna, Austria.
| | - Ella Nukarinen
- Department of Ecogenomics and Systems Biology, University of Vienna, Althanstr. 14, 1090, Vienna, Austria.
| | - Wolfram Weckwerth
- Department of Ecogenomics and Systems Biology, University of Vienna, Althanstr. 14, 1090, Vienna, Austria.
- Vienna Metabolomics Center (VIME), University of Vienna, Althanstr. 14, 1090, Vienna, Austria.
| | - Thomas Nägele
- Department of Ecogenomics and Systems Biology, University of Vienna, Althanstr. 14, 1090, Vienna, Austria.
- Vienna Metabolomics Center (VIME), University of Vienna, Althanstr. 14, 1090, Vienna, Austria.
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Zhang ZS, Liu MJ, Gao HY, Jin LQ, Li YT, Li QM, Ai XZ. Water Status Related Root-to-Shoot Communication Regulates the Chilling Tolerance of Shoot in Cucumber (Cucumis sativus L.) Plants. Sci Rep 2015; 5:13094. [PMID: 26471979 PMCID: PMC4607976 DOI: 10.1038/srep13094] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/22/2015] [Accepted: 04/27/2015] [Indexed: 11/24/2022] Open
Abstract
Although root-to-shoot communication has been intensively investigated in plants under drought, few studies have examined root-to-shoot communication under chilling. Here we explored whether root-to-shoot communication contributes to the chilling-light tolerance of cucumber shoots and clarified the key signal involves in this communication. After leaf discs chilling-light treatment, the photoinhibitions of Photosystem I (PSI) and Photosystem II (PSII) were similar in leaf discs of two cucumber varieties (JY-3 and JC-4). When the whole plants, including roots, were chilled under light, the photosynthetic performances in JC-4 leaves decreased more seriously than that in JY-3 leaves. However, when the water status of leaves was maintained by warming roots or floating the attached leaves on water, the PSII activity and amount of PSI in the leaves of the two varieties were similar after chilling-light treatment. In addition, the differences of PSII activities and amount of PSI between the two varieties under whole plant chilling-light treatment were independent of ABA pretreatment. Above results indicate that (1) the better water status in leaves under chilling contributes to the higher chilling tolerance of JY-3; (2) the water status, rather than an ABA signal, dominates root-to-shoot communication under chilling and the chilling tolerance of cucumber shoot.
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Affiliation(s)
- Zi-Shan Zhang
- State Key Lab of Crop Biology, Tai’an, Shandong Province, China
- College of Life Sciences, Shandong Agricultural University, Tai’an, Shandong Province, China
- College of Horticulture Science and Engineering, Shandong Agricultural University, Tai’an, Shandong Province, China
| | - Mei-Jun Liu
- State Key Lab of Crop Biology, Tai’an, Shandong Province, China
- College of Life Sciences, Shandong Agricultural University, Tai’an, Shandong Province, China
| | - Hui-Yuan Gao
- State Key Lab of Crop Biology, Tai’an, Shandong Province, China
- College of Life Sciences, Shandong Agricultural University, Tai’an, Shandong Province, China
| | - Li-Qiao Jin
- State Key Lab of Crop Biology, Tai’an, Shandong Province, China
- College of Life Sciences, Shandong Agricultural University, Tai’an, Shandong Province, China
| | - Yu-Ting Li
- State Key Lab of Crop Biology, Tai’an, Shandong Province, China
- College of Life Sciences, Shandong Agricultural University, Tai’an, Shandong Province, China
| | - Qing-Ming Li
- State Key Lab of Crop Biology, Tai’an, Shandong Province, China
- College of Horticulture Science and Engineering, Shandong Agricultural University, Tai’an, Shandong Province, China
| | - Xi-Zhen Ai
- State Key Lab of Crop Biology, Tai’an, Shandong Province, China
- College of Horticulture Science and Engineering, Shandong Agricultural University, Tai’an, Shandong Province, China
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Maurel C, Boursiac Y, Luu DT, Santoni V, Shahzad Z, Verdoucq L. Aquaporins in Plants. Physiol Rev 2015; 95:1321-58. [DOI: 10.1152/physrev.00008.2015] [Citation(s) in RCA: 486] [Impact Index Per Article: 54.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/24/2023] Open
Abstract
Aquaporins are membrane channels that facilitate the transport of water and small neutral molecules across biological membranes of most living organisms. In plants, aquaporins occur as multiple isoforms reflecting a high diversity of cellular localizations, transport selectivity, and regulation properties. Plant aquaporins are localized in the plasma membrane, endoplasmic reticulum, vacuoles, plastids and, in some species, in membrane compartments interacting with symbiotic organisms. Plant aquaporins can transport various physiological substrates in addition to water. Of particular relevance for plants is the transport of dissolved gases such as carbon dioxide and ammonia or metalloids such as boron and silicon. Structure-function studies are developed to address the molecular and cellular mechanisms of plant aquaporin gating and subcellular trafficking. Phosphorylation plays a central role in these two processes. These mechanisms allow aquaporin regulation in response to signaling intermediates such as cytosolic pH and calcium, and reactive oxygen species. Combined genetic and physiological approaches are now integrating this knowledge, showing that aquaporins play key roles in hydraulic regulation in roots and leaves, during drought but also in response to stimuli as diverse as flooding, nutrient availability, temperature, or light. A general hydraulic control of plant tissue expansion by aquaporins is emerging, and their role in key developmental processes (seed germination, emergence of lateral roots) has been established. Plants with genetically altered aquaporin functions are now tested for their ability to improve plant tolerance to stresses. In conclusion, research on aquaporins delineates ever expanding fields in plant integrative biology thereby establishing their crucial role in plants.
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Affiliation(s)
- Christophe Maurel
- Biochimie et Physiologie Moléculaire des Plantes, Unité Mixte de Recherche 5004, CNRS/INRA/Montpellier SupAgro/Université de Montpellier, Montpellier, France
| | - Yann Boursiac
- Biochimie et Physiologie Moléculaire des Plantes, Unité Mixte de Recherche 5004, CNRS/INRA/Montpellier SupAgro/Université de Montpellier, Montpellier, France
| | - Doan-Trung Luu
- Biochimie et Physiologie Moléculaire des Plantes, Unité Mixte de Recherche 5004, CNRS/INRA/Montpellier SupAgro/Université de Montpellier, Montpellier, France
| | - Véronique Santoni
- Biochimie et Physiologie Moléculaire des Plantes, Unité Mixte de Recherche 5004, CNRS/INRA/Montpellier SupAgro/Université de Montpellier, Montpellier, France
| | - Zaigham Shahzad
- Biochimie et Physiologie Moléculaire des Plantes, Unité Mixte de Recherche 5004, CNRS/INRA/Montpellier SupAgro/Université de Montpellier, Montpellier, France
| | - Lionel Verdoucq
- Biochimie et Physiologie Moléculaire des Plantes, Unité Mixte de Recherche 5004, CNRS/INRA/Montpellier SupAgro/Université de Montpellier, Montpellier, France
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47
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Lin PC, Hu WC, Lee SC, Chen YL, Lee CY, Chen YR, Liu LYD, Chen PY, Lin SS, Chang YC. Application of an Integrated Omics Approach for Identifying Host Proteins That Interact With Odontoglossum ringspot virus Capsid Protein. MOLECULAR PLANT-MICROBE INTERACTIONS : MPMI 2015; 28:711-26. [PMID: 25625820 DOI: 10.1094/mpmi-08-14-0246-r] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/04/2023]
Abstract
The glutamic acid at position 100 (E(100)) in the capsid protein (CP) of Odontoglossum ringspot virus (ORSV) plays an important role in long-distance viral movement in Nicotiana benthamiana. The ORSV(E100A) mutant, which has a glutamic acid to alanine substitution, shows a loss of systemic infectivity in N. benthamiana. Transmission electron microscopy and size-exclusion chromatography assays showed that E(100) is essential for CP-CP interaction and viral particle assembly. To identify the ORSV triggering or response genes and CP-interacting proteins (CP-IP), an integrated omics approach based on next-generation sequencing and proteomics profiling was used in this study. The whole-transcriptomes of healthy and ORSV-infected leaves of N. benthamiana were analyzed, and the gene information was used to create a N. benthamiana protein database that was used for protein identification following mass spectrometry analysis. The integrated omics approach identified several putative host proteins that interact with ORSV CP(WT) and were categorized as photosystem subunits, defense-associated proteins, and cell division components. The expression pattern and CP interaction of these CP-IP were examined by semiquantitative reverse transcription polymerase chain reaction and an in vitro binding assay, respectively, to verify the in silico data. Among these proteins, a proteinase inhibitor of N. benthamiana (NbPI2) was highly associated with CP(E100A) as compared with CP(WT), and NbPI1 and NbPI2 were highly induced in ORSV-infected plants. NbPI1- and NbPI2-silenced plants (via a Tobacco rattle virus-induced gene-silencing system) did not exhibit a difference in ORSV infection. Thus, whether NbPI1 and NbPI2 play a role in plant immunity requires further investigation. In summary, the integrated omics approach provides massive and valuable information to identify the ORSV CP-IP and these CP-IP will help us to understand the movement of this virus and plant-virus interaction.
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Affiliation(s)
- Pin-Chun Lin
- 1 Department of Plant Pathology and Microbiology, National Taiwan University, 1, Sec. 4, Roosevelt Rd., Taipei, Taiwan
- 2 Institute of Biotechnology, National Taiwan University, 81, Chang-Xing St., Taipei, Taiwan
| | - Wen-Chi Hu
- 1 Department of Plant Pathology and Microbiology, National Taiwan University, 1, Sec. 4, Roosevelt Rd., Taipei, Taiwan
| | - Shu-Chuan Lee
- 1 Department of Plant Pathology and Microbiology, National Taiwan University, 1, Sec. 4, Roosevelt Rd., Taipei, Taiwan
| | - Ying-Lan Chen
- 4 Agricultural Biotechnology Research Center, Academia Sinica, 128, Academia Rd, Sec. 2, Taipei, Taiwan
- 5 Institute of Plant Biology and Department of Life Science, National Taiwan University, 1, Sec. 4, Roosevelt Rd., Taipei, Taiwan
| | - Chi-Ying Lee
- 4 Agricultural Biotechnology Research Center, Academia Sinica, 128, Academia Rd, Sec. 2, Taipei, Taiwan
| | - Yet-Ran Chen
- 4 Agricultural Biotechnology Research Center, Academia Sinica, 128, Academia Rd, Sec. 2, Taipei, Taiwan
| | - Li-Yu Daisy Liu
- 6 Department of Agronomy, National Taiwan University, 1, Sec. 4, Roosevelt Rd., Taipei, Taiwan
| | - Po-Yen Chen
- 1 Department of Plant Pathology and Microbiology, National Taiwan University, 1, Sec. 4, Roosevelt Rd., Taipei, Taiwan
| | - Shih-Shun Lin
- 2 Institute of Biotechnology, National Taiwan University, 81, Chang-Xing St., Taipei, Taiwan
- 3 Genome and Systems Biology Degree Program, National Taiwan University, 1, Sec. 4, Roosevelt Rd., Taipei, Taiwan
- 4 Agricultural Biotechnology Research Center, Academia Sinica, 128, Academia Rd, Sec. 2, Taipei, Taiwan
| | - Ya-Chun Chang
- 1 Department of Plant Pathology and Microbiology, National Taiwan University, 1, Sec. 4, Roosevelt Rd., Taipei, Taiwan
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Kaneko T, Horie T, Nakahara Y, Tsuji N, Shibasaka M, Katsuhara M. Dynamic regulation of the root hydraulic conductivity of barley plants in response to salinity/osmotic stress. PLANT & CELL PHYSIOLOGY 2015; 56:875-82. [PMID: 25634964 DOI: 10.1093/pcp/pcv013] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/29/2014] [Accepted: 01/23/2015] [Indexed: 05/15/2023]
Abstract
Salinity stress significantly reduces the root hydraulic conductivity (Lpr) of several plant species including barley (Hordeum vulgare). Here we characterized changes in the Lpr of barley plants in response to salinity/osmotic stress in detail using a pressure chamber. Salt-tolerant and intermediate barley cultivars, K305 and Haruna-nijyo, but not a salt-sensitive cultivar, I743, exhibited characteristic time-dependent Lpr changes induced by 100 mM NaCl. An identical response was evoked by isotonic sorbitol, indicating that this phenomenon was triggered by osmotic imbalances. Further examination of this mechanism using barley cv. Haruna-nijyo plants in combination with the use of various inhibitors suggested that various cellular processes such as protein phosphorylation/dephosphorylation and membrane internalization appear to be involved. Interestingly, the three above-mentioned barley cultivars did not exhibit a remarkable difference in root cell sap osmolality under hypertonic conditions, in contrast to the case of Lpr. The possible biological significance of the regulation of Lpr in barley plants upon salinity/osmotic stress is discussed.
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Affiliation(s)
- Toshiyuki Kaneko
- Institute of Plant Science and Resources, Okayama University, 20-1, Chuo-2-chome, Kurashiki, Okayama, 710-0046 Japan Department of Physiology, Asahikawa Medical University, 2-1-1-1, Midorigaoka-higashi, Asahikawa, Hokkaido, 078-8510 Japan These authors contributed equally to this work
| | - Tomoaki Horie
- Institute of Plant Science and Resources, Okayama University, 20-1, Chuo-2-chome, Kurashiki, Okayama, 710-0046 Japan Division of Applied Biology, Faculty of Textile Science and Technology, Shinshu University, 3-15-1, Tokida, Ueda, Nagano, 386-8567 Japan These authors contributed equally to this work
| | - Yoshiki Nakahara
- Institute of Plant Science and Resources, Okayama University, 20-1, Chuo-2-chome, Kurashiki, Okayama, 710-0046 Japan
| | - Nobuya Tsuji
- Institute of Plant Science and Resources, Okayama University, 20-1, Chuo-2-chome, Kurashiki, Okayama, 710-0046 Japan
| | - Mineo Shibasaka
- Institute of Plant Science and Resources, Okayama University, 20-1, Chuo-2-chome, Kurashiki, Okayama, 710-0046 Japan
| | - Maki Katsuhara
- Institute of Plant Science and Resources, Okayama University, 20-1, Chuo-2-chome, Kurashiki, Okayama, 710-0046 Japan
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Charrier G, Ngao J, Saudreau M, Améglio T. Effects of environmental factors and management practices on microclimate, winter physiology, and frost resistance in trees. FRONTIERS IN PLANT SCIENCE 2015; 6:259. [PMID: 25972877 PMCID: PMC4411886 DOI: 10.3389/fpls.2015.00259] [Citation(s) in RCA: 57] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/30/2014] [Accepted: 04/01/2015] [Indexed: 05/02/2023]
Abstract
Freezing stress is one of the most important limiting factors determining the ecological distribution and production of tree species. Assessment of frost risk is, therefore, critical for forestry, fruit production, and horticulture. Frost risk is substantial when hazard (i.e., exposure to damaging freezing temperatures) intersects with vulnerability (i.e., frost sensitivity). Based on a large number of studies on frost resistance and frost occurrence, we highlight the complex interactive roles of environmental conditions, carbohydrates, and water status in frost risk development. To supersede the classical empirical relations used to model frost hardiness, we propose an integrated ecophysiologically-based framework of frost risk assessment. This framework details the individual or interactive roles of these factors, and how they are distributed in time and space at the individual-tree level (within-crown and across organs). Based on this general framework, we are able to highlight factors by which different environmental conditions (e.g., temperature, light, flood, and drought), and management practices (pruning, thinning, girdling, sheltering, water aspersion, irrigation, and fertilization) influence frost sensitivity and frost exposure of trees.
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Affiliation(s)
| | - Jérôme Ngao
- INRA, Clermont-Ferrand, France
- Clermont Université, Université Blaise Pascal, Clermont-Ferrand, France
| | - Marc Saudreau
- INRA, Clermont-Ferrand, France
- Clermont Université, Université Blaise Pascal, Clermont-Ferrand, France
| | - Thierry Améglio
- INRA, Clermont-Ferrand, France
- Clermont Université, Université Blaise Pascal, Clermont-Ferrand, France
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Lee SH, Zwiazek JJ. Regulation of aquaporin-mediated water transport in Arabidopsis roots exposed to NaCl. PLANT & CELL PHYSIOLOGY 2015; 56:750-8. [PMID: 25604052 DOI: 10.1093/pcp/pcv003] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/29/2014] [Accepted: 01/06/2015] [Indexed: 05/20/2023]
Abstract
The effects of Ca(NO3)2, KF and okadaic acid (OA) on cell hydraulic responses to NaCl were examined in roots of Arabidopsis thaliana wild-type plants and compared with plants overexpressing plasma membrane intrinsic protein PIP2;5. Root treatment with 10 mM NaCl rapidly and sharply reduced cell hydraulic conductivity (L(p)) in the wild-type Arabidopsis plants, but had no effect on L(p) in Arabidopsis plants overexpressing PIP2;5, suggesting that changes in protein and aquaporin gene expression were among the initial targets responsible for the inhibition of L(p) by NaCl. The down-regulation of PIP transcripts after 1 h exposure to 10 mM NaCl was likely a significant factor in the reduction of L(p). The effect of NaCl on L(p) in the wild-type plants was abolished when the NaCl-treated roots were subsequently exposed to 5 mM KF, 5 mM Ca(NO3)2 and 5 µM OA. The reduction of L(p) by 5 mM KF could not be prevented by treatment with 5 mM Ca(NO3)2 in both wild-type and PIP2;5-overexpressing plants. However, 5 µM OA, which was added following NaCl or KF treatment, completely reversed L(p) within several minutes. The results provide evidence for high sensitivity of aquaporin-mediated water transport to relatively low NaCl concentrations and point to the phosphorylation and/or dephosphorylation processes as those that are likely responsible for the protection of L(p) by fluoride and calcium treatments against the effects of NaCl.
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Affiliation(s)
- Seong H Lee
- Department of Renewable Resources, University of Alberta, 442 Earth Sciences Bldg., T6G 2E3, Edmonton, AB, Canada
| | - Janusz J Zwiazek
- Department of Renewable Resources, University of Alberta, 442 Earth Sciences Bldg., T6G 2E3, Edmonton, AB, Canada
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