1
|
Protto V, Bauget F, Rishmawi L, Nacry P, Maurel C. Primary, seminal and lateral roots of maize show type-specific growth and hydraulic responses to water deficit. PLANT PHYSIOLOGY 2024; 194:2564-2579. [PMID: 38217868 PMCID: PMC10980523 DOI: 10.1093/plphys/kiad675] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/23/2023] [Revised: 11/07/2023] [Accepted: 11/27/2023] [Indexed: 01/15/2024]
Abstract
The water uptake capacity of a root system is determined by its architecture and hydraulic properties, which together shape the root hydraulic architecture. Here, we investigated root responses to water deficit (WD) in seedlings of a maize (Zea mays) hybrid line (B73H) grown in hydroponic conditions, taking into account the primary root (PR), the seminal roots (SR), and their respective lateral roots. WD was induced by various polyethylene glycol concentrations and resulted in dose-dependent inhibitions of axial and lateral root growth, lateral root formation, and hydraulic conductivity (Lpr), with slightly distinct sensitivities to WD between PR and SR. Inhibition of Lpr by WD showed a half-time of 5 to 6 min and was fully (SR) or partially (PR) reversible within 40 min. In the two root types, WD resulted in reduced aquaporin expression and activity, as monitored by mRNA abundance of 13 plasma membrane intrinsic protein (ZmPIP) isoforms and inhibition of Lpr by sodium azide, respectively. An enhanced suberization/lignification of the epi- and exodermis was observed under WD in axial roots and in lateral roots of the PR but not in those of SR. Inverse modeling revealed a steep increase in axial conductance in root tips of PR and SR grown under WD that may be due to the decreased growth rate of axial roots in these conditions. Overall, our work reveals that these root types show quantitative differences in their anatomical, architectural, and hydraulic responses to WD, in terms of sensitivity, amplitude and reversibility. This distinct functionalization may contribute to integrative acclimation responses of whole root systems to soil WD.
Collapse
Affiliation(s)
- Virginia Protto
- Institute for Plant Sciences of Montpellier (IPSiM), Univ Montpellier, CNRS, INRAE, Institut Agro, 2 place Viala, 34060 Montpellier, France
| | - Fabrice Bauget
- Institute for Plant Sciences of Montpellier (IPSiM), Univ Montpellier, CNRS, INRAE, Institut Agro, 2 place Viala, 34060 Montpellier, France
| | - Louai Rishmawi
- Institute for Plant Sciences of Montpellier (IPSiM), Univ Montpellier, CNRS, INRAE, Institut Agro, 2 place Viala, 34060 Montpellier, France
| | - Philippe Nacry
- Institute for Plant Sciences of Montpellier (IPSiM), Univ Montpellier, CNRS, INRAE, Institut Agro, 2 place Viala, 34060 Montpellier, France
| | - Christophe Maurel
- Institute for Plant Sciences of Montpellier (IPSiM), Univ Montpellier, CNRS, INRAE, Institut Agro, 2 place Viala, 34060 Montpellier, France
| |
Collapse
|
2
|
Suslov M, Daminova A, Egorov J. Real-Time Dynamics of Water Transport in the Roots of Intact Maize Plants in Response to Water Stress: The Role of Aquaporins and the Contribution of Different Water Transport Pathways. Cells 2024; 13:154. [PMID: 38247845 PMCID: PMC10814095 DOI: 10.3390/cells13020154] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/26/2023] [Revised: 12/28/2023] [Accepted: 01/09/2024] [Indexed: 01/23/2024] Open
Abstract
Using an original methodological and technical approach, we studied the real-time dynamics of radial water transfer in roots and transpiration rate in intact maize plants in response to water stress. It was shown that the response of maize plants to water stress, induced by 10% PEG 6000, was accompanied by changes in the intensity and redistribution of water transfer along different pathways of radial water transport in the roots. It was shown that during the first minutes of water stress impact, the intensity of transcellular and symplastic water transport in the roots decreased with a parallel short-term increase in the transpiration rate in leaves and, presumably, in apoplastic transport in roots. Further, after a decrease in transpiration rate, the intensity of transcellular and symplastic water transport was restored to approximately the initial values and was accompanied by parallel upregulation of some PIP aquaporin genes in roots and leaves, changes in aquaporin localization in root tissues, and changes in xylem sap pH. Under water stress conditions, cell-to-cell water transport in roots becomes dominant, and aquaporins contribute to the simultaneous regulation of water transport in roots and shoots under water stress.
Collapse
Affiliation(s)
- Maksim Suslov
- Kazan Institute of Biochemistry and Biophysics, FRC Kazan Scientific Center, Russian Academy of Sciences, P.O. Box 30, Kazan 420111, Russia
| | | | | |
Collapse
|
3
|
Wang H, Ye L, Zhou L, Yu J, Pang B, Zuo D, Gu L, Zhu B, Du X, Wang H. Co-Expression Network Analysis of the Transcriptome Identified Hub Genes and Pathways Responding to Saline-Alkaline Stress in Sorghum bicolor L. Int J Mol Sci 2023; 24:16831. [PMID: 38069156 PMCID: PMC10706439 DOI: 10.3390/ijms242316831] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/31/2023] [Revised: 11/20/2023] [Accepted: 11/24/2023] [Indexed: 12/18/2023] Open
Abstract
Soil salinization, an intractable problem, is becoming increasingly serious and threatening fragile natural ecosystems and even the security of human food supplies. Sorghum (Sorghum bicolor L.) is one of the main crops growing in salinized soil. However, the tolerance mechanisms of sorghum to saline-alkaline soil are still ambiguous. In this study, RNA sequencing was carried out to explore the gene expression profiles of sorghum treated with sodium bicarbonate (150 mM, pH = 8.0, treated for 0, 6, 12 and 24 h). The results show that 6045, 5122, 6804, 7978, 8080 and 12,899 differentially expressed genes (DEGs) were detected in shoots and roots after 6, 12 and 24 h treatments, respectively. GO, KEGG and weighted gene co-expression analyses indicate that the DEGs generated by saline-alkaline stress were primarily enriched in plant hormone signal transduction, the MAPK signaling pathway, starch and sucrose metabolism, glutathione metabolism and phenylpropanoid biosynthesis. Key pathway and hub genes (TPP1, WRKY61, YSL1 and NHX7) are mainly related to intracellular ion transport and lignin synthesis. The molecular and physiological regulation processes of saline-alkali-tolerant sorghum are shown by these results, which also provide useful knowledge for improving sorghum yield and quality under saline-alkaline conditions.
Collapse
Affiliation(s)
| | | | | | | | | | | | | | | | - Xuye Du
- School of Life Sciences, Guizhou Normal University, Guiyang 550025, China; (H.W.); (L.Y.); (L.Z.); (J.Y.); (B.P.); (D.Z.); (L.G.); (B.Z.)
| | - Huinan Wang
- School of Life Sciences, Guizhou Normal University, Guiyang 550025, China; (H.W.); (L.Y.); (L.Z.); (J.Y.); (B.P.); (D.Z.); (L.G.); (B.Z.)
| |
Collapse
|
4
|
Liu X, Wang P, An Y, Wang CM, Hao Y, Zhou Y, Zhou Q, Wang P. Endodermal apoplastic barriers are linked to osmotic tolerance in meso-xerophytic grass Elymus sibiricus. FRONTIERS IN PLANT SCIENCE 2022; 13:1007494. [PMID: 36212320 PMCID: PMC9539332 DOI: 10.3389/fpls.2022.1007494] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 07/30/2022] [Accepted: 09/05/2022] [Indexed: 06/16/2023]
Abstract
Drought is the most serious adversity faced by agriculture and animal husbandry industries. One strategy that plants use to adapt to water deficits is modifying the root growth and architecture. Root endodermis has cell walls reinforced with apoplastic barriers formed by the Casparian strip (CS) and suberin lamellae (SL) deposits, regulates radial nutrient transport and protects the vascular cylinder from abiotic threats. Elymus sibiricus is an economically important meso-xerophytic forage grass, characterized by high nutritional quality and strong environmental adaptability. The purpose of this study was to evaluate the drought tolerance of E. sibiricus genotypes and investigate the root structural adaptation mechanism of drought-tolerant genotypes' responding to drought. Specifically, a drought tolerant (DT) and drought sensitive (DS) genotype were screened out from 52 E. sibiricus genotypes. DT showed less apoplastic bypass flow of water and solutes than DS under control conditions, as determined with a hydraulic conductivity measurement system and an apoplastic fluorescent tracer, specifically PTS trisodium-8-hydroxy-1,3,6-pyrenetrisulphonic acid (PTS). In addition, DT accumulated less Na, Mg, Mn, and Zn and more Ni, Cu, and Al than DS, regardless of osmotic stress. Further study showed more suberin deposition in DT than in DS, which could be induced by osmotic stress in both. Accordingly, the CS and SL were deposited closer to the root tip in DT than in DS. However, osmotic stress induced their deposition closer to the root tips in DS, while likely increasing the thickness of the CS and SL in DT. The stronger and earlier formation of endodermal barriers may determine the radial transport pathways of water and solutes, and contribute to balance growth and drought response in E. sibiricus. These results could help us better understand how altered endodermal apoplastic barriers in roots regulate water and mineral nutrient transport in plants that have adapted to drought environments. Moreover, the current findings will aid in improving future breeding programs to develop drought-tolerant grass or crop cultivars.
Collapse
Affiliation(s)
- Xin Liu
- Sichuan Zoige Alpine Wetland Ecosystem National Observation and Research Station, Institute of Qinghai-Tibetan Plateau, Southwest Minzu University, Chengdu, China
- National Key Laboratory of Crop Genetic Improvement, 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, China
| | - Ping Wang
- Sichuan Zoige Alpine Wetland Ecosystem National Observation and Research Station, Institute of Qinghai-Tibetan Plateau, Southwest Minzu University, Chengdu, China
| | - Yongping An
- Sichuan Zoige Alpine Wetland Ecosystem National Observation and Research Station, Institute of Qinghai-Tibetan Plateau, Southwest Minzu University, Chengdu, China
| | - Chun-Mei Wang
- Lanzhou Institute of Husbandry and Pharmaceutical Sciences, Chinese Academy of Agricultural Sciences, Lanzhou, China
| | - Yanbo Hao
- Sichuan Zoige Alpine Wetland Ecosystem National Observation and Research Station, Institute of Qinghai-Tibetan Plateau, Southwest Minzu University, Chengdu, China
| | - Yue Zhou
- Sichuan Zoige Alpine Wetland Ecosystem National Observation and Research Station, Institute of Qinghai-Tibetan Plateau, Southwest Minzu University, Chengdu, China
| | - Qingping Zhou
- Sichuan Zoige Alpine Wetland Ecosystem National Observation and Research Station, Institute of Qinghai-Tibetan Plateau, Southwest Minzu University, Chengdu, China
| | - Pei Wang
- Sichuan Zoige Alpine Wetland Ecosystem National Observation and Research Station, Institute of Qinghai-Tibetan Plateau, Southwest Minzu University, Chengdu, China
| |
Collapse
|
5
|
Mizokami Y, Oguchi R, Sugiura D, Yamori W, Noguchi K, Terashima I. Cost-benefit analysis of mesophyll conductance: diversities of anatomical, biochemical and environmental determinants. ANNALS OF BOTANY 2022; 130:265-283. [PMID: 35947983 PMCID: PMC9487971 DOI: 10.1093/aob/mcac100] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/05/2022] [Accepted: 08/08/2022] [Indexed: 06/09/2023]
Abstract
BACKGROUND Plants invest photosynthates in construction and maintenance of their structures and functions. Such investments are considered costs. These costs are recovered by the CO2 assimilation rate (A) in the leaves, and thus A is regarded as the immediate, short-term benefit. In photosynthesizing leaves, CO2 diffusion from the air to the carboxylation site is hindered by several structural and biochemical barriers. CO2 diffusion from the intercellular air space to the chloroplast stroma is obstructed by the mesophyll resistance. The inverses is the mesophyll conductance (gm). Whether various plants realize an optimal gm, and how much investment is needed for a relevant gm, remain unsolved. SCOPE This review examines relationships among leaf construction costs (CC), leaf maintenance costs (MC) and gm in various plants under diverse growth conditions. Through a literature survey, we demonstrate a strong linear relationship between leaf mass per area (LMA) and leaf CC. The overall correlation of CC vs. gm across plant phylogenetic groups is weak, but significant trends are evident within specific groups and/or environments. Investment in CC is necessary for an increase in LMA and mesophyll cell surface area (Smes). This allows the leaf to accommodate more chloroplasts, thus increasing A. However, increases in LMA and/or Smes often accompany other changes, such as cell wall thickening, which diminishes gm. Such factors that make the correlations of CC and gm elusive are identified. CONCLUSIONS For evaluation of the contribution of gm to recover CC, leaf life span is the key factor. The estimation of MC in relation to gm, especially in terms of costs required to regulate aquaporins, could be essential for efficient control of gm over the short term. Over the long term, costs are mainly reflected in CC, while benefits also include ultimate fitness attributes in terms of integrated carbon gain over the life of a leaf, plant survival and reproductive output.
Collapse
Affiliation(s)
- Yusuke Mizokami
- Department of Life Science, Tokyo University of Pharmacy and Life Sciences, Hachioji, Tokyo 192-0392, Japan
| | - Riichi Oguchi
- Department of Biological Sciences, School of Science, The University of Tokyo, 7-3-1 Hongo, Bunkyo-ku, Tokyo 113-0033, Japan
| | - Daisuke Sugiura
- Graduate School of Bioagricultural Sciences, Nagoya University, Furo, Chikusa-ku, Nagoya 464-8601, Japan
| | - Wataru Yamori
- Graduate School of Agricultural and Life Science, Institute for Sustainable Agri-ecosystem, The University of Tokyo, 1-1-1, Midoricho, Nishitokyo, Tokyo 188-0002, Japan
| | - Ko Noguchi
- Department of Life Science, Tokyo University of Pharmacy and Life Sciences, Hachioji, Tokyo 192-0392, Japan
| | - Ichiro Terashima
- Department of Biological Sciences, School of Science, The University of Tokyo, 7-3-1 Hongo, Bunkyo-ku, Tokyo 113-0033, Japan
| |
Collapse
|
6
|
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.
Collapse
|
7
|
Xu C, Luo M, Sun X, Yan J, Shi H, Yan H, Yan R, Wang S, Tang W, Zhou Y, Wang C, Xu Z, Chen J, Ma Y, Jiang Q, Chen M, Sun D. SiMYB19 from Foxtail Millet ( Setaria italica) Confers Transgenic Rice Tolerance to High Salt Stress in the Field. Int J Mol Sci 2022; 23:ijms23020756. [PMID: 35054940 PMCID: PMC8775554 DOI: 10.3390/ijms23020756] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/09/2021] [Revised: 01/05/2022] [Accepted: 01/08/2022] [Indexed: 12/24/2022] Open
Abstract
Salt stress is a major threat to crop quality and yield. Most experiments on salt stress-related genes have been conducted at the laboratory or greenhouse scale. Consequently, there is a lack of research demonstrating the merit of exploring these genes in field crops. Here, we found that the R2R3-MYB transcription factor SiMYB19 from foxtail millet is expressed mainly in the roots and is induced by various abiotic stressors such as salt, drought, low nitrogen, and abscisic acid. SiMYB19 is tentatively localized to the nucleus and activates transcription. It enhances salt tolerance in transgenic rice at the germination and seedling stages. SiMYB19 overexpression increased shoot height, grain yield, and salt tolerance in field- and salt pond-grown transgenic rice. SiMYB19 overexpression promotes abscisic acid (ABA) accumulation in transgenic rice and upregulates the ABA synthesis gene OsNCED3 and the ABA signal transduction pathway-related genes OsPK1 and OsABF2. Thus, SiMYB19 improves salt tolerance in transgenic rice by regulating ABA synthesis and signal transduction. Using rice heterologous expression analysis, the present study introduced a novel candidate gene for improving salt tolerance and increasing yield in crops grown in saline-alkali soil.
Collapse
Affiliation(s)
- Chengjie Xu
- Key Laboratory of Sustainable Dryland Agriculture, College of Agriculture, Shanxi Agricultural University, Jinzhong 030801, China; (C.X.); (H.S.); (H.Y.); (R.Y.); (S.W.)
- Institute of Crop Sciences, National Key Facility for Crop Gene Resources and Genetic Improvement, Key Laboratory of Biology and Genetic Improvement of Triticeae Crops, Chinese Academy of Agricultural Sciences (CAAS), Beijing 100081, China; (M.L.); (X.S.); (W.T.); (Y.Z.); (C.W.); (Z.X.); (J.C.); (Y.M.); (Q.J.)
| | - Mingzhao Luo
- Institute of Crop Sciences, National Key Facility for Crop Gene Resources and Genetic Improvement, Key Laboratory of Biology and Genetic Improvement of Triticeae Crops, Chinese Academy of Agricultural Sciences (CAAS), Beijing 100081, China; (M.L.); (X.S.); (W.T.); (Y.Z.); (C.W.); (Z.X.); (J.C.); (Y.M.); (Q.J.)
| | - Xianjun Sun
- Institute of Crop Sciences, National Key Facility for Crop Gene Resources and Genetic Improvement, Key Laboratory of Biology and Genetic Improvement of Triticeae Crops, Chinese Academy of Agricultural Sciences (CAAS), Beijing 100081, China; (M.L.); (X.S.); (W.T.); (Y.Z.); (C.W.); (Z.X.); (J.C.); (Y.M.); (Q.J.)
| | - Jiji Yan
- College of Life Sciences, Shanxi Normal University, Taiyuan 030006, China;
| | - Huawei Shi
- Key Laboratory of Sustainable Dryland Agriculture, College of Agriculture, Shanxi Agricultural University, Jinzhong 030801, China; (C.X.); (H.S.); (H.Y.); (R.Y.); (S.W.)
| | - Huishu Yan
- Key Laboratory of Sustainable Dryland Agriculture, College of Agriculture, Shanxi Agricultural University, Jinzhong 030801, China; (C.X.); (H.S.); (H.Y.); (R.Y.); (S.W.)
| | - Rongyue Yan
- Key Laboratory of Sustainable Dryland Agriculture, College of Agriculture, Shanxi Agricultural University, Jinzhong 030801, China; (C.X.); (H.S.); (H.Y.); (R.Y.); (S.W.)
| | - Shuguang Wang
- Key Laboratory of Sustainable Dryland Agriculture, College of Agriculture, Shanxi Agricultural University, Jinzhong 030801, China; (C.X.); (H.S.); (H.Y.); (R.Y.); (S.W.)
| | - Wensi Tang
- Institute of Crop Sciences, National Key Facility for Crop Gene Resources and Genetic Improvement, Key Laboratory of Biology and Genetic Improvement of Triticeae Crops, Chinese Academy of Agricultural Sciences (CAAS), Beijing 100081, China; (M.L.); (X.S.); (W.T.); (Y.Z.); (C.W.); (Z.X.); (J.C.); (Y.M.); (Q.J.)
| | - Yongbin Zhou
- Institute of Crop Sciences, National Key Facility for Crop Gene Resources and Genetic Improvement, Key Laboratory of Biology and Genetic Improvement of Triticeae Crops, Chinese Academy of Agricultural Sciences (CAAS), Beijing 100081, China; (M.L.); (X.S.); (W.T.); (Y.Z.); (C.W.); (Z.X.); (J.C.); (Y.M.); (Q.J.)
| | - Chunxiao Wang
- Institute of Crop Sciences, National Key Facility for Crop Gene Resources and Genetic Improvement, Key Laboratory of Biology and Genetic Improvement of Triticeae Crops, Chinese Academy of Agricultural Sciences (CAAS), Beijing 100081, China; (M.L.); (X.S.); (W.T.); (Y.Z.); (C.W.); (Z.X.); (J.C.); (Y.M.); (Q.J.)
| | - Zhaoshi Xu
- Institute of Crop Sciences, National Key Facility for Crop Gene Resources and Genetic Improvement, Key Laboratory of Biology and Genetic Improvement of Triticeae Crops, Chinese Academy of Agricultural Sciences (CAAS), Beijing 100081, China; (M.L.); (X.S.); (W.T.); (Y.Z.); (C.W.); (Z.X.); (J.C.); (Y.M.); (Q.J.)
| | - Jun Chen
- Institute of Crop Sciences, National Key Facility for Crop Gene Resources and Genetic Improvement, Key Laboratory of Biology and Genetic Improvement of Triticeae Crops, Chinese Academy of Agricultural Sciences (CAAS), Beijing 100081, China; (M.L.); (X.S.); (W.T.); (Y.Z.); (C.W.); (Z.X.); (J.C.); (Y.M.); (Q.J.)
| | - Youzhi Ma
- Institute of Crop Sciences, National Key Facility for Crop Gene Resources and Genetic Improvement, Key Laboratory of Biology and Genetic Improvement of Triticeae Crops, Chinese Academy of Agricultural Sciences (CAAS), Beijing 100081, China; (M.L.); (X.S.); (W.T.); (Y.Z.); (C.W.); (Z.X.); (J.C.); (Y.M.); (Q.J.)
| | - Qiyan Jiang
- Institute of Crop Sciences, National Key Facility for Crop Gene Resources and Genetic Improvement, Key Laboratory of Biology and Genetic Improvement of Triticeae Crops, Chinese Academy of Agricultural Sciences (CAAS), Beijing 100081, China; (M.L.); (X.S.); (W.T.); (Y.Z.); (C.W.); (Z.X.); (J.C.); (Y.M.); (Q.J.)
| | - Ming Chen
- Institute of Crop Sciences, National Key Facility for Crop Gene Resources and Genetic Improvement, Key Laboratory of Biology and Genetic Improvement of Triticeae Crops, Chinese Academy of Agricultural Sciences (CAAS), Beijing 100081, China; (M.L.); (X.S.); (W.T.); (Y.Z.); (C.W.); (Z.X.); (J.C.); (Y.M.); (Q.J.)
- Correspondence: or (D.S.); (M.C.)
| | - Daizhen Sun
- Key Laboratory of Sustainable Dryland Agriculture, College of Agriculture, Shanxi Agricultural University, Jinzhong 030801, China; (C.X.); (H.S.); (H.Y.); (R.Y.); (S.W.)
- Correspondence: or (D.S.); (M.C.)
| |
Collapse
|
8
|
Rane J, Singh AK, Tiwari M, Prasad PVV, Jagadish SVK. Effective Use of Water in Crop Plants in Dryland Agriculture: Implications of Reactive Oxygen Species and Antioxidative System. FRONTIERS IN PLANT SCIENCE 2022; 12:778270. [PMID: 35082809 PMCID: PMC8784697 DOI: 10.3389/fpls.2021.778270] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/16/2021] [Accepted: 12/02/2021] [Indexed: 05/03/2023]
Abstract
Under dryland conditions, annual and perennial food crops are exposed to dry spells, severely affecting crop productivity by limiting available soil moisture at critical and sensitive growth stages. Climate variability continues to be the primary cause of uncertainty, often making timing rather than quantity of precipitation the foremost concern. Therefore, mitigation and management of stress experienced by plants due to limited soil moisture are crucial for sustaining crop productivity under current and future harsher environments. Hence, the information generated so far through multiple investigations on mechanisms inducing drought tolerance in plants needs to be translated into tools and techniques for stress management. Scope to accomplish this exists in the inherent capacity of plants to manage stress at the cellular level through various mechanisms. One of the most extensively studied but not conclusive physiological phenomena is the balance between reactive oxygen species (ROS) production and scavenging them through an antioxidative system (AOS), which determines a wide range of damage to the cell, organ, and the plant. In this context, this review aims to examine the possible roles of the ROS-AOS balance in enhancing the effective use of water (EUW) by crops under water-limited dryland conditions. We refer to EUW as biomass produced by plants with available water under soil moisture stress rather than per unit of water (WUE). We hypothesize that EUW can be enhanced by an appropriate balance between water-saving and growth promotion at the whole-plant level during stress and post-stress recovery periods. The ROS-AOS interactions play a crucial role in water-saving mechanisms and biomass accumulation, resulting from growth processes that include cell division, cell expansion, photosynthesis, and translocation of assimilates. Hence, appropriate strategies for manipulating these processes through genetic improvement and/or application of exogenous compounds can provide practical solutions for improving EUW through the optimized ROS-AOS balance under water-limited dryland conditions. This review deals with the role of ROS-AOS in two major EUW determining processes, namely water use and plant growth. It describes implications of the ROS level or content, ROS-producing, and ROS-scavenging enzymes based on plant water status, which ultimately affects photosynthetic efficiency and growth of plants.
Collapse
Affiliation(s)
- Jagadish Rane
- ICAR-National Institute of Abiotic Stress Management, Baramati, India
| | - Ajay Kumar Singh
- ICAR-National Institute of Abiotic Stress Management, Baramati, India
| | - Manish Tiwari
- Department of Agronomy, Kansas State University, Manhattan, KS, United States
| | - P. V. Vara Prasad
- Department of Agronomy, Kansas State University, Manhattan, KS, United States
| | | |
Collapse
|
9
|
Zhang H, Li X, Wang W, Pivovaroff AL, Li W, Zhang P, Ward ND, Myers-Pigg A, Adams HD, Leff R, Wang A, Yuan F, Wu J, Yabusaki S, Waichler S, Bailey VL, Guan D, McDowell NG. Seawater exposure causes hydraulic damage in dying Sitka-spruce trees. PLANT PHYSIOLOGY 2021; 187:873-885. [PMID: 34608959 PMCID: PMC8981213 DOI: 10.1093/plphys/kiab295] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/11/2021] [Accepted: 06/09/2021] [Indexed: 05/29/2023]
Abstract
Sea-level rise is one of the most critical challenges facing coastal ecosystems under climate change. Observations of elevated tree mortality in global coastal forests are increasing, but important knowledge gaps persist concerning the mechanism of salinity stress-induced nonhalophytic tree mortality. We monitored progressive mortality and associated gas exchange and hydraulic shifts in Sitka-spruce (Picea sitchensis) trees located within a salinity gradient under an ecosystem-scale change of seawater exposure in Washington State, USA. Percentage of live foliated crown (PLFC) decreased and tree mortality increased with increasing soil salinity during the study period. A strong reduction in gas exchange and xylem hydraulic conductivity (Ks) occurred during tree death, with an increase in the percentage loss of conductivity (PLC) and turgor loss point (πtlp). Hydraulic and osmotic shifts reflected that hydraulic function declined from seawater exposure, and dying trees were unable to support osmotic adjustment. Constrained gas exchange was strongly related to hydraulic damage at both stem and leaf levels. Significant correlations between foliar sodium (Na+) concentration and gas exchange and key hydraulic parameters (Ks, PLC, and πtlp) suggest that cellular injury related to the toxic effects of ion accumulation impacted the physiology of these dying trees. This study provides evidence of toxic effects on the cellular function that manifests in all aspects of plant functioning, leading to unfavourable osmotic and hydraulic conditions.
Collapse
Affiliation(s)
- Hongxia Zhang
- Shapotou Desert Research and Experiment Station, Northwest Institute of
Eco-Environment and Resources, Chinese Academy of Sciences, Lanzhou 730000,
China
- Key Laboratory of Forest Ecology and Management, Institute of Applied Ecology,
Chinese Academy of Sciences, Shenyang 110016, China
- Atmospheric Sciences and Global Change Division, Pacific Northwest National
Laboratory, Richland, Washington 99354, USA
| | - Xinrong Li
- Shapotou Desert Research and Experiment Station, Northwest Institute of
Eco-Environment and Resources, Chinese Academy of Sciences, Lanzhou 730000,
China
| | - Wenzhi Wang
- Atmospheric Sciences and Global Change Division, Pacific Northwest National
Laboratory, Richland, Washington 99354, USA
- The Key Laboratory of Mountain Environment Evolution and Regulation, Institute
of Mountain Hazards and Environment, Chinese Academy of Sciences, Chengdu
610041, China
| | - Alexandria L. Pivovaroff
- Atmospheric Sciences and Global Change Division, Pacific Northwest National
Laboratory, Richland, Washington 99354, USA
| | - Weibin Li
- Atmospheric Sciences and Global Change Division, Pacific Northwest National
Laboratory, Richland, Washington 99354, USA
- State Key Laboratory of Grassland and Agro-ecosystems, Key Laboratory of
Grassland Livestock Industry Innovation, Ministry of Agriculture and Rural Affairs,
College of Pastoral Agriculture Science and Technology, Lanzhou University,
Lanzhou 730020, China
| | - Peipei Zhang
- Atmospheric Sciences and Global Change Division, Pacific Northwest National
Laboratory, Richland, Washington 99354, USA
| | - Nicholas D. Ward
- Marine Sciences Laboratory, Pacific Northwest National
Laboratory, Sequim, Washington 98382, USA
- School of Oceanography, University of Washington, Seattle,
Washington 98195, USA
| | - Allison Myers-Pigg
- State Key Laboratory of Grassland and Agro-ecosystems, Key Laboratory of
Grassland Livestock Industry Innovation, Ministry of Agriculture and Rural Affairs,
College of Pastoral Agriculture Science and Technology, Lanzhou University,
Lanzhou 730020, China
| | - Henry D. Adams
- School of the Environment, Washington State University, Pullman,
Washington 99164-2812, USA
| | - Riley Leff
- Atmospheric Sciences and Global Change Division, Pacific Northwest National
Laboratory, Richland, Washington 99354, USA
| | - Anzhi Wang
- Key Laboratory of Forest Ecology and Management, Institute of Applied Ecology,
Chinese Academy of Sciences, Shenyang 110016, China
| | - Fenghui Yuan
- Key Laboratory of Forest Ecology and Management, Institute of Applied Ecology,
Chinese Academy of Sciences, Shenyang 110016, China
| | - Jiabing Wu
- Key Laboratory of Forest Ecology and Management, Institute of Applied Ecology,
Chinese Academy of Sciences, Shenyang 110016, China
| | - Steve Yabusaki
- Earth Systems Science, Pacific Northwest National Laboratory,
Richland, Washington 99354, USA
| | - Scott Waichler
- Earth Systems Science, Pacific Northwest National Laboratory,
Richland, Washington 99354, USA
| | - Vanessa L. Bailey
- Biological Sciences Division, Pacific Northwest National
Laboratory, Richland, Washington 99354, USA
| | - Dexin Guan
- Key Laboratory of Forest Ecology and Management, Institute of Applied Ecology,
Chinese Academy of Sciences, Shenyang 110016, China
| | - Nate G. McDowell
- Atmospheric Sciences and Global Change Division, Pacific Northwest National
Laboratory, Richland, Washington 99354, USA
- School of Biological Sciences, Washington State University,
Pullman, Washington 99164-4236, USA
| |
Collapse
|
10
|
Li H, Testerink C, Zhang Y. How roots and shoots communicate through stressful times. TRENDS IN PLANT SCIENCE 2021; 26:940-952. [PMID: 33896687 DOI: 10.1016/j.tplants.2021.03.005] [Citation(s) in RCA: 49] [Impact Index Per Article: 16.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/02/2020] [Revised: 02/19/2021] [Accepted: 03/16/2021] [Indexed: 05/06/2023]
Abstract
When plants face an environmental stress such as water deficit, soil salinity, high temperature, or shade, good communication between above- and belowground organs is necessary to coordinate growth and development. Various signals including hormones, peptides, proteins, hydraulic signals, and metabolites are transported mostly through the vasculature to distant tissues. How shoots and roots synchronize their response to stress using mobile signals is an emerging field of research. We summarize recent advances on mobile signals regulating shoot stomatal movement and root development in response to highly localized environmental cues. In addition, we highlight how the vascular system is not only a conduit but is also flexible in its development in response to abiotic stress.
Collapse
Affiliation(s)
- Hongfei Li
- Laboratory of Plant Physiology, Plant Sciences Group, Wageningen University and Research, 6708PB Wageningen, The Netherlands
| | - Christa Testerink
- Laboratory of Plant Physiology, Plant Sciences Group, Wageningen University and Research, 6708PB Wageningen, The Netherlands.
| | - Yanxia Zhang
- Laboratory of Plant Physiology, Plant Sciences Group, Wageningen University and Research, 6708PB Wageningen, The Netherlands.
| |
Collapse
|
11
|
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.
Collapse
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.
| |
Collapse
|
12
|
Knipfer T, Danjou M, Vionne C, Fricke W. Salt stress reduces root water uptake in barley (Hordeum vulgare L.) through modification of the transcellular transport path. PLANT, CELL & ENVIRONMENT 2021; 44:458-475. [PMID: 33140852 DOI: 10.1111/pce.13936] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/28/2020] [Accepted: 10/24/2020] [Indexed: 05/21/2023]
Abstract
The aim of the study was to understand the hydraulic response to salt stress of the root system of the comparatively salt-tolerant crop barley (Hordeum vulgare L.). We focused on the transcellular path of water movement across the root cylinder that involves the crossing of membranes. This path allows for selective water uptake, while excluding salt ions. Hydroponically grown plants were exposed to 100 mM NaCl for 5-7 days and analysed when 15-17 days old. A range of complementary and novel approaches was used to determine hydraulic conductivity (Lp). This included analyses at cell, root and plant level and modelling of water flow. Apoplastic barrier formation and gene expression level of aquaporins (AQPs) was analysed. Salt stress reduced the Lp of root system through reducing water flow along the transcellular path. This involved changes in the activity and gene expression level of AQPs. Modelling of root-Lp showed that the reduction in root-Lp did not require added hydraulic resistances through apoplastic barriers at the endodermis. The bulk of data points to a near-perfect semi-permeability of roots of control plants (solute reflection coefficient σ ~1.0). Roots of salt-stressed plants are almost as semi-permeable (σ > 0.8).
Collapse
Affiliation(s)
- Thorsten Knipfer
- School of Biology and Environmental Sciences, University College Dublin, Dublin, Ireland
- Department of Viticulture & Enology, University of California, Davis, California, USA
- Faculty of Land and Food Systems, The University of British Columbia, Vancouver, British Columbia, Canada
| | - Mathieu Danjou
- School of Biology and Environmental Sciences, University College Dublin, Dublin, Ireland
| | - Charles Vionne
- School of Biology and Environmental Sciences, University College Dublin, Dublin, Ireland
| | - Wieland Fricke
- School of Biology and Environmental Sciences, University College Dublin, Dublin, Ireland
| |
Collapse
|
13
|
Kreszies T, Kreszies V, Ly F, Thangamani PD, Shellakkutti N, Schreiber L. Suberized transport barriers in plant roots: the effect of silicon. JOURNAL OF EXPERIMENTAL BOTANY 2020; 71:6799-6806. [PMID: 32333766 DOI: 10.1093/jxb/eraa203] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/20/2020] [Accepted: 04/22/2020] [Indexed: 05/14/2023]
Abstract
Plant roots are the major organs that take up water and dissolved nutrients. It has been widely shown that apoplastic barriers such as Casparian bands and suberin lamellae in the endo- and exodermis of roots have an important effect on regulating radial water and nutrient transport. Furthermore, it has been described that silicon can promote plant growth and survival under different conditions. However, the potential effects of silicon on the formation and structure of apoplastic barriers are controversial. A delayed as well as an enhanced suberization of root apoplastic barriers with silicon has been described in the literature. Here we review the effects of silicon on the formation of suberized apoplastic barriers in roots, and present results of the effect of silicon treatment on the formation of endodermal suberized barriers on barley seminal roots under control conditions and when exposed to osmotic stress. Chemical analysis confirmed that osmotic stress enhanced barley root suberization. While a supplementation with silicon in both, control conditions and osmotic stress, did not enhanced barley root suberization. These results suggest that enhanced stress tolerance of plants after silicon treatment is due to other responses.
Collapse
Affiliation(s)
- Tino Kreszies
- Department of Ecophysiology, Institute of Cellular and Molecular Botany, University of Bonn, Kirschallee 1, Bonn, Germany
| | - Victoria Kreszies
- Department of Ecophysiology, Institute of Cellular and Molecular Botany, University of Bonn, Kirschallee 1, Bonn, Germany
| | - Falko Ly
- Department of Ecophysiology, Institute of Cellular and Molecular Botany, University of Bonn, Kirschallee 1, Bonn, Germany
| | - Priya Dharshini Thangamani
- Department of Ecophysiology, Institute of Cellular and Molecular Botany, University of Bonn, Kirschallee 1, Bonn, Germany
| | - Nandhini Shellakkutti
- Department of Ecophysiology, Institute of Cellular and Molecular Botany, University of Bonn, Kirschallee 1, Bonn, Germany
| | - Lukas Schreiber
- Department of Ecophysiology, Institute of Cellular and Molecular Botany, University of Bonn, Kirschallee 1, Bonn, Germany
| |
Collapse
|
14
|
Tran STH, Horie T, Imran S, Qiu J, McGaughey S, Byrt CS, Tyerman SD, Katsuhara M. A Survey of Barley PIP Aquaporin Ionic Conductance Reveals Ca 2+-Sensitive HvPIP2;8 Na + and K + Conductance. Int J Mol Sci 2020; 21:E7135. [PMID: 32992595 PMCID: PMC7582361 DOI: 10.3390/ijms21197135] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/31/2020] [Revised: 09/25/2020] [Accepted: 09/25/2020] [Indexed: 02/02/2023] Open
Abstract
Some plasma membrane intrinsic protein (PIP) aquaporins can facilitate ion transport. Here we report that one of the 12 barley PIPs (PIP1 and PIP2) tested, HvPIP2;8, facilitated cation transport when expressed in Xenopus laevis oocytes. HvPIP2;8-associated ion currents were detected with Na+ and K+, but not Cs+, Rb+, or Li+, and was inhibited by Ba2+, Ca2+, and Cd2+ and to a lesser extent Mg2+, which also interacted with Ca2+. Currents were reduced in the presence of K+, Cs+, Rb+, or Li+ relative to Na+ alone. Five HvPIP1 isoforms co-expressed with HvPIP2;8 inhibited the ion conductance relative to HvPIP2;8 alone but HvPIP1;3 and HvPIP1;4 with HvPIP2;8 maintained the ion conductance at a lower level. HvPIP2;8 water permeability was similar to that of a C-terminal phosphorylation mimic mutant HvPIP2;8 S285D, but HvPIP2;8 S285D showed a negative linear correlation between water permeability and ion conductance that was modified by a kinase inhibitor treatment. HvPIP2;8 transcript abundance increased in barley shoot tissues following salt treatments in a salt-tolerant cultivar Haruna-Nijo, but not in salt-sensitive I743. There is potential for HvPIP2;8 to be involved in barley salt-stress responses, and HvPIP2;8 could facilitate both water and Na+/K+ transport activity, depending on the phosphorylation status.
Collapse
Affiliation(s)
- Sen Thi Huong Tran
- Institute of Plant Science and Resources, Okayama University, 2-20-1 Chuo, Kurashiki 710-0046, Japan; (S.T.H.T.); (S.I.)
- Faculty of Agronomy, University of Agriculture and Forestry, Hue University, Hue 530000, Vietnam
| | - Tomoaki Horie
- Division of Applied Biology, Faculty of Textile Science and Technology, Shinshu University, 3-15-1, Tokida, Ueda, Nagano 386-8567, Japan;
| | - Shahin Imran
- Institute of Plant Science and Resources, Okayama University, 2-20-1 Chuo, Kurashiki 710-0046, Japan; (S.T.H.T.); (S.I.)
| | - Jiaen Qiu
- Australian Research Council Centre of Excellence in Plant Energy Biology, Waite Research Institute and School of Agriculture, Food and Wine, The University of Adelaide, Glen Osmond, Adelaide 5064, Australia; (J.Q.); (C.S.B.); (S.D.T.)
| | - Samantha McGaughey
- Research School of Biology, Australian National University, Canberra 2600, Australia;
| | - Caitlin S. Byrt
- Australian Research Council Centre of Excellence in Plant Energy Biology, Waite Research Institute and School of Agriculture, Food and Wine, The University of Adelaide, Glen Osmond, Adelaide 5064, Australia; (J.Q.); (C.S.B.); (S.D.T.)
- Research School of Biology, Australian National University, Canberra 2600, Australia;
| | - Stephen D. Tyerman
- Australian Research Council Centre of Excellence in Plant Energy Biology, Waite Research Institute and School of Agriculture, Food and Wine, The University of Adelaide, Glen Osmond, Adelaide 5064, Australia; (J.Q.); (C.S.B.); (S.D.T.)
| | - Maki Katsuhara
- Institute of Plant Science and Resources, Okayama University, 2-20-1 Chuo, Kurashiki 710-0046, Japan; (S.T.H.T.); (S.I.)
| |
Collapse
|
15
|
Kreszies T, Eggels S, Kreszies V, Osthoff A, Shellakkutti N, Baldauf JA, Zeisler-Diehl VV, Hochholdinger F, Ranathunge K, Schreiber L. Seminal roots of wild and cultivated barley differentially respond to osmotic stress in gene expression, suberization, and hydraulic conductivity. PLANT, CELL & ENVIRONMENT 2020; 43:344-357. [PMID: 31762057 DOI: 10.1111/pce.13675] [Citation(s) in RCA: 12] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/24/2019] [Revised: 10/23/2019] [Accepted: 11/03/2019] [Indexed: 05/13/2023]
Abstract
Wild barley, Hordeum vulgare spp. spontaneum, has a wider genetic diversity than its cultivated progeny, Hordeum vulgare spp. vulgare. Osmotic stress leads to a series of different responses in wild barley seminal roots, ranging from no changes in suberization to enhanced endodermal suberization of certain zones and the formation of a suberized exodermis, which was not observed in the modern cultivars studied so far. Further, as a response to osmotic stress, the hydraulic conductivity of roots was not affected in wild barley, but it was 2.5-fold reduced in cultivated barley. In both subspecies, osmotic adjustment by increasing proline concentration and decreasing osmotic potential in roots was observed. RNA-sequencing indicated that the regulation of suberin biosynthesis and water transport via aquaporins were different between wild and cultivated barley. These results indicate that wild barley uses different strategies to cope with osmotic stress compared with cultivated barley. Thus, it seems that wild barley is better adapted to cope with osmotic stress by maintaining a significantly higher hydraulic conductivity of roots during water deficit.
Collapse
Affiliation(s)
- Tino Kreszies
- Department of Ecophysiology, Institute of Cellular and Molecular Botany, University of Bonn, Bonn, 53115, Germany
| | - Stella Eggels
- Department of Ecophysiology, Institute of Cellular and Molecular Botany, University of Bonn, Bonn, 53115, Germany
- Plant Breeding, TUM School of Life Sciences Weihenstephan, Technical University of Munich, Munich, 85354, Germany
| | - Victoria Kreszies
- Department of Ecophysiology, Institute of Cellular and Molecular Botany, University of Bonn, Bonn, 53115, Germany
| | - Alina Osthoff
- Crop Functional Genomics, Institute of Crop Science and Resource Conservation (INRES), University of Bonn, Bonn, 53113, Germany
| | - Nandhini Shellakkutti
- Department of Ecophysiology, Institute of Cellular and Molecular Botany, University of Bonn, Bonn, 53115, Germany
| | - Jutta A Baldauf
- Crop Functional Genomics, Institute of Crop Science and Resource Conservation (INRES), University of Bonn, Bonn, 53113, Germany
| | - Viktoria V Zeisler-Diehl
- Department of Ecophysiology, Institute of Cellular and Molecular Botany, University of Bonn, Bonn, 53115, Germany
| | - Frank Hochholdinger
- Crop Functional Genomics, Institute of Crop Science and Resource Conservation (INRES), University of Bonn, Bonn, 53113, Germany
| | - Kosala Ranathunge
- School of Biological Sciences, Faculty of Science, University of Western Australia, Perth, 6009, Australia
| | - Lukas Schreiber
- Department of Ecophysiology, Institute of Cellular and Molecular Botany, University of Bonn, Bonn, 53115, Germany
| |
Collapse
|
16
|
Kreszies T, Shellakkutti N, Osthoff A, Yu P, Baldauf JA, Zeisler‐Diehl VV, Ranathunge K, Hochholdinger F, Schreiber L. Osmotic stress enhances suberization of apoplastic barriers in barley seminal roots: analysis of chemical, transcriptomic and physiological responses. THE NEW PHYTOLOGIST 2019; 221:180-194. [PMID: 30055115 PMCID: PMC6586163 DOI: 10.1111/nph.15351] [Citation(s) in RCA: 62] [Impact Index Per Article: 12.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/29/2018] [Accepted: 06/18/2018] [Indexed: 05/08/2023]
Abstract
Barley (Hordeum vulgare) is more drought tolerant than other cereals, thus making it an excellent model for the study of the chemical, transcriptomic and physiological effects of water deficit. Roots are the first organ to sense soil water deficit. Therefore, we studied the response of barley seminal roots to different water potentials induced by polyethylene glycol (PEG) 8000. We investigated changes in anatomical parameters by histochemistry and microscopy, quantitative and qualitative changes in suberin composition by analytical chemistry, transcript changes by RNA-sequencing (RNA-Seq), and the radial water and solute movement of roots using a root pressure probe. In response to osmotic stress, genes in the suberin biosynthesis pathway were upregulated that correlated with increased suberin amounts in the endodermis and an overall reduction in hydraulic conductivity (Lpr ). In parallel, transcriptomic data indicated no or only weak effects of osmotic stress on aquaporin expression. These results indicate that osmotic stress enhances cell wall suberization and markedly reduces Lpr of the apoplastic pathway, whereas Lpr of the cell-to-cell pathway is not altered. Thus, the sealed apoplast markedly reduces the uncontrolled backflow of water from the root to the medium, whilst keeping constant water flow through the highly regulated cell-to-cell path.
Collapse
Affiliation(s)
- Tino Kreszies
- Department of EcophysiologyInstitute of Cellular and Molecular BotanyUniversity of BonnKirschallee 153115BonnGermany
| | - Nandhini Shellakkutti
- Department of EcophysiologyInstitute of Cellular and Molecular BotanyUniversity of BonnKirschallee 153115BonnGermany
| | - Alina Osthoff
- Crop Functional GenomicsInstitute of Crop Science and Resource Conservation (INRES)University of Bonn53113BonnGermany
| | - Peng Yu
- Crop Functional GenomicsInstitute of Crop Science and Resource Conservation (INRES)University of Bonn53113BonnGermany
| | - Jutta A. Baldauf
- Crop Functional GenomicsInstitute of Crop Science and Resource Conservation (INRES)University of Bonn53113BonnGermany
| | - Viktoria V. Zeisler‐Diehl
- Department of EcophysiologyInstitute of Cellular and Molecular BotanyUniversity of BonnKirschallee 153115BonnGermany
| | - Kosala Ranathunge
- School of Biological SciencesUniversity of Western Australia35 Stirling HighwayCrawley6009PerthAustralia
| | - Frank Hochholdinger
- Crop Functional GenomicsInstitute of Crop Science and Resource Conservation (INRES)University of Bonn53113BonnGermany
| | - Lukas Schreiber
- Department of EcophysiologyInstitute of Cellular and Molecular BotanyUniversity of BonnKirschallee 153115BonnGermany
| |
Collapse
|
17
|
Fang Q, Wang Q, Mao H, Xu J, Wang Y, Hu H, He S, Tu J, Cheng C, Tian G, Wang X, Liu X, Zhang C, Luo K. AtDIV2, an R-R-type MYB transcription factor of Arabidopsis, negatively regulates salt stress by modulating ABA signaling. PLANT CELL REPORTS 2018; 37:1499-1511. [PMID: 30014159 DOI: 10.1007/s00299-018-2321-6] [Citation(s) in RCA: 33] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/10/2018] [Accepted: 07/10/2018] [Indexed: 05/15/2023]
Abstract
AtDIV2 integrates ABA signaling to negatively regulate salt stress in Arabidopsis. AmDIV (DIVARICATA) is a functional MYB transcription factor (TF) that regulates ventral identity during floral development in Antirrhinum. There are six members of DIV homologs in Arabidopsis; however, the functions of these proteins are largely unknown. Here, we characterized an R-R-type MYB TF AtDIV2, which is involved in salt stress responses and abscisic acid (ABA) signaling. Although universally expressed in tissues, the nuclear-localized AtDIV2 appeared not to be involved in seedling development processes. However, upon exposure to salt stress and exogenous ABA, the transcripts of AtDIV2 are markedly increased in wild-type (Wt) plants. The loss-of-function mutant div2 displayed much more tolerance to salt stress, and several salt-responsive genes were up-regulated. In addition, the div2 mutant showed higher sensitivity to ABA during seed germination. And the germination variance between the Wt and div2 mutant cannot be rectified by treatment with both ABA and sodium tungstate at the same time. ELISA results showed that the endogenous ABA content in the div2 mutant is clearly increased than that in Wt plants. Furthermore, the transcriptional expressions of several ABA-related genes, including ABA1 and ABI3, were elevated. Taken together, our results suggest that the R-R-type MYB TF AtDIV2 plays negative roles in salt stress and is required for ABA signaling in Arabidopsis.
Collapse
Affiliation(s)
- Qing Fang
- Key Laboratory of Biological Resources Protection and Utilization of Hubei Province, Hubei University for Nationalities, Enshi, 445000, China.
| | - Qiong Wang
- Key Laboratory of Biological Resources Protection and Utilization of Hubei Province, Hubei University for Nationalities, Enshi, 445000, China
| | - Hui Mao
- Key Laboratory of Biological Resources Protection and Utilization of Hubei Province, Hubei University for Nationalities, Enshi, 445000, China
| | - Jing Xu
- Key Laboratory of Biological Resources Protection and Utilization of Hubei Province, Hubei University for Nationalities, Enshi, 445000, China
| | - Ying Wang
- Key Laboratory of Biological Resources Protection and Utilization of Hubei Province, Hubei University for Nationalities, Enshi, 445000, China
| | - Hao Hu
- Key Laboratory of Biological Resources Protection and Utilization of Hubei Province, Hubei University for Nationalities, Enshi, 445000, China
| | - Shuai He
- Key Laboratory of Biological Resources Protection and Utilization of Hubei Province, Hubei University for Nationalities, Enshi, 445000, China
| | - Junchu Tu
- Key Laboratory of Biological Resources Protection and Utilization of Hubei Province, Hubei University for Nationalities, Enshi, 445000, China
| | - Chao Cheng
- Key Laboratory of Biological Resources Protection and Utilization of Hubei Province, Hubei University for Nationalities, Enshi, 445000, China
| | - Guozheng Tian
- Key Laboratory of Biological Resources Protection and Utilization of Hubei Province, Hubei University for Nationalities, Enshi, 445000, China
| | - Xianqiang Wang
- Key Laboratory of Eco-environments of Three Gorges Reservoir Region, Institute of Resources Botany, School of Life Sciences, Ministry of Education Chongqing, Southwest University, Chongqing, 400715, China
| | - Xiaopeng Liu
- Key Laboratory of Biological Resources Protection and Utilization of Hubei Province, Hubei University for Nationalities, Enshi, 445000, China
| | - Chi Zhang
- Key Laboratory of Biological Resources Protection and Utilization of Hubei Province, Hubei University for Nationalities, Enshi, 445000, China
| | - Keming Luo
- Key Laboratory of Adaptation and Evolution of Plateau Biota, Northwest Institute of Plateau Biology, Chinese Academy of Sciences, Xining, 810008, China.
- Key Laboratory of Eco-environments of Three Gorges Reservoir Region, Institute of Resources Botany, School of Life Sciences, Ministry of Education Chongqing, Southwest University, Chongqing, 400715, China.
| |
Collapse
|
18
|
Chakhchar A, Chaguer N, Ferradous A, Filali-Maltouf A, El Modafar C. Root system response in Argania spinosa plants under drought stress and recovery. PLANT SIGNALING & BEHAVIOR 2018; 13:e1489669. [PMID: 30036147 PMCID: PMC6128684 DOI: 10.1080/15592324.2018.1489669] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/02/2018] [Revised: 06/01/2018] [Accepted: 06/08/2018] [Indexed: 05/27/2023]
Abstract
The argane tree is a remarkable essence by its botanical interest and its socioeconomic value. It is endemic species in the southwest of Morocco, where prolonged drought stress may occur. Although its tolerance has been commonly attributed to various mechanisms at the whole plant, the root system has a main role in the whole process of adaptation. We studied in argane tree plants the change in hydraulic conductivity, electrolyte leakage in root as well as root growth under drought stress and recovery. Our findings showed that the root hydraulic conductivity (Lpr) value significantly decreased under drought stress treatment. This was associated with an increase of root electrolyte leakage, signaling the occurrence of an injury to root cell membranes. At root growth level, stressed plants managed to maintain their root elongation despite decreased root mass. After short period of rehydration, the argane tree plants exhibited a tendency of increased hydraulic conductivity during recovery after drought stress, suggesting that this root physiological response may be intimately linked to drought stress tolerance strategies. These results also could be important to contribute to selection of tolerant genotypes and develop argane tree regeneration programs in regions that suffer from lack of water.
Collapse
Affiliation(s)
- A. Chakhchar
- Laboratoire de Biotechnologie et Bio-ingénierie Moléculaire, Faculté des Sciences et Techniques Guéliz, Université Cadi Ayyad, Marrakech, Maroc
| | - N. Chaguer
- Laboratoire de Biotechnologie et Bio-ingénierie Moléculaire, Faculté des Sciences et Techniques Guéliz, Université Cadi Ayyad, Marrakech, Maroc
| | - A. Ferradous
- Centre Régional de la Recherche Forestière Marrakech, Ain Itti Ennakhil, Marrakech, Maroc
| | - A. Filali-Maltouf
- Laboratoire de Microbiologie et Biologie Moléculaire, Faculté des Sciences, Université Mohammed V Agdal, Rabat, Maroc
| | - C. El Modafar
- Laboratoire de Biotechnologie et Bio-ingénierie Moléculaire, Faculté des Sciences et Techniques Guéliz, Université Cadi Ayyad, Marrakech, Maroc
| |
Collapse
|
19
|
|
20
|
|
21
|
Jitsuyama Y. Hypoxia-Responsive Root Hydraulic Conductivity Influences Soybean Cultivar-Specific Waterlogging Tolerance. ACTA ACUST UNITED AC 2017. [DOI: 10.4236/ajps.2017.84054] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
|
22
|
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.
Collapse
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
| |
Collapse
|