1
|
Antonietta M, Martinez D, Guiamet JJ. Delayed senescence and crop performance under stress: always a functional couple? JOURNAL OF EXPERIMENTAL BOTANY 2024; 75:4244-4257. [PMID: 38635775 DOI: 10.1093/jxb/erae174] [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: 01/02/2024] [Accepted: 04/17/2024] [Indexed: 04/20/2024]
Abstract
Exposure to abiotic stresses accelerates leaf senescence in most crop plant species, thereby reducing photosynthesis and other assimilatory processes. In some cases, genotypes with delayed leaf senescence (i.e. 'stay-green') show stress resistance, particularly in cases of water deficit, and this has led to the proposal that senescence delay improves crop performance under some abiotic stresses. In this review, we summarize the evidence for increased resistance to abiotic stress, mostly water deficit, in genotypes with delayed senescence, and specifically focus on the physiological mechanisms and agronomic conditions under which the stay-green trait may ameliorate grain yield under stress.
Collapse
Affiliation(s)
| | - Dana Martinez
- Instituto de Fisiología Vegetal, CONICET-UNLP, Argentina
| | - Juan J Guiamet
- Instituto de Fisiología Vegetal, CONICET-UNLP, Argentina
| |
Collapse
|
2
|
Urbutis M, Vaseva II, Simova-Stoilova L, Todorova D, Pukalskas A, Samuolienė G. Drought Protective Effects of Exogenous ABA and Kinetin on Lettuce: Sugar Content, Antioxidant Enzyme Activity, and Productivity. PLANTS (BASEL, SWITZERLAND) 2024; 13:1641. [PMID: 38931073 PMCID: PMC11207227 DOI: 10.3390/plants13121641] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/06/2024] [Revised: 05/30/2024] [Accepted: 06/12/2024] [Indexed: 06/28/2024]
Abstract
Drought is an environmental stressor that significantly impacts plant growth and development. Comprehending the complexity of drought stress and water utilization in the context of plant growth and development holds significant importance for sustainable agriculture. The aim of this study was to evaluate the effect of exogenously applied phytohormones on lettuce (Lactuca sativa L.) sugar content profiles and antioxidant enzyme activity and productivity. Lettuce plants were grown under normal and drought conditions in a growth chamber with a photoperiod of 14/10 h (day/night). Kinetin and abscisic acid were applied separately and in combinations when the second leaf was fully expanded. The results showed that sugar accumulation and productivity of the pretreated plants under drought were significantly higher than the controls. The perspective offered by this work showed that growth-related and stress-related phytohormones significantly influenced plant sugar metabolism, metabolic profiles, and productivity, thus enabling the control of yield and quality.
Collapse
Affiliation(s)
- Martynas Urbutis
- Lithuanian Research Centre for Agriculture and Forestry, Institute of Horticulture, Kauno Str. 30, LT-54333 Kaunas, Lithuania
| | - Irina I. Vaseva
- Institute of Plant Physiology and Genetics, Bulgarian Academy of Sciences, Acad. Georgi Bonchev Str., Block 21, 1113 Sofia, Bulgaria (D.T.)
| | - Lyudmila Simova-Stoilova
- Institute of Plant Physiology and Genetics, Bulgarian Academy of Sciences, Acad. Georgi Bonchev Str., Block 21, 1113 Sofia, Bulgaria (D.T.)
| | - Dessislava Todorova
- Institute of Plant Physiology and Genetics, Bulgarian Academy of Sciences, Acad. Georgi Bonchev Str., Block 21, 1113 Sofia, Bulgaria (D.T.)
| | - Audrius Pukalskas
- Lithuanian Research Centre for Agriculture and Forestry, Institute of Horticulture, Kauno Str. 30, LT-54333 Kaunas, Lithuania
| | - Giedrė Samuolienė
- Lithuanian Research Centre for Agriculture and Forestry, Institute of Horticulture, Kauno Str. 30, LT-54333 Kaunas, Lithuania
| |
Collapse
|
3
|
Rathor P, Upadhyay P, Ullah A, Gorim LY, Thilakarathna MS. Humic acid improves wheat growth by modulating auxin and cytokinin biosynthesis pathways. AOB PLANTS 2024; 16:plae018. [PMID: 38601216 PMCID: PMC11005776 DOI: 10.1093/aobpla/plae018] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 09/06/2023] [Accepted: 03/22/2024] [Indexed: 04/12/2024]
Abstract
Humic acids have been widely used for centuries to enhance plant growth and productivity. The beneficial effects of humic acids have been attributed to different functional groups and phytohormone-like compounds enclosed in macrostructure. However, the mechanisms underlying the plant growth-promoting effects of humic acids are only partially understood. We hypothesize that the bio-stimulatory effect of humic acids is mainly due to the modulation of innate pathways of auxin and cytokinin biosynthesis in treated plants. A physiological investigation along with molecular characterization was carried out to understand the mechanism of bio-stimulatory effects of humic acid. A gene expression analysis was performed for the genes involved in auxin and cytokinin biosynthesis pathways in wheat seedlings. Furthermore, Arabidopsis thaliana transgenic lines generated by fusing the auxin-responsive DR5 and cytokinin-responsive ARR5 promoter to ß-glucuronidase (GUS) reporter were used to study the GUS expression analysis in humic acid treated seedlings. This study demonstrates that humic acid treatment improved the shoot and root growth of wheat seedlings. The expression of several genes involved in auxin (Tryptophan Aminotransferase of Arabidopsis and Gretchen Hagen 3.2) and cytokinin (Lonely Guy3) biosynthesis pathways were up-regulated in humic acid-treated seedlings compared to the control. Furthermore, GUS expression analysis showed that bioactive compounds of humic acid stimulate endogenous auxin and cytokinin-like activities. This study is the first report in which using ARR5:GUS lines we demonstrate the biostimulants activity of humic acid.
Collapse
Affiliation(s)
- Pramod Rathor
- Department of Agricultural, Food and Nutritional Science, Agriculture/Forestry Centre, University of Alberta, 9011-116St, NW, Edmonton, AB T6G 2P5, Canada
| | - Punita Upadhyay
- Department of Agricultural, Food and Nutritional Science, Agriculture/Forestry Centre, University of Alberta, 9011-116St, NW, Edmonton, AB T6G 2P5, Canada
| | - Aman Ullah
- Department of Agricultural, Food and Nutritional Science, Agriculture/Forestry Centre, University of Alberta, 9011-116St, NW, Edmonton, AB T6G 2P5, Canada
| | - Linda Yuya Gorim
- Department of Agricultural, Food and Nutritional Science, Agriculture/Forestry Centre, University of Alberta, 9011-116St, NW, Edmonton, AB T6G 2P5, Canada
| | - Malinda S Thilakarathna
- Department of Agricultural, Food and Nutritional Science, Agriculture/Forestry Centre, University of Alberta, 9011-116St, NW, Edmonton, AB T6G 2P5, Canada
| |
Collapse
|
4
|
Munns R, Millar AH. Seven plant capacities to adapt to abiotic stress. JOURNAL OF EXPERIMENTAL BOTANY 2023; 74:4308-4323. [PMID: 37220077 PMCID: PMC10433935 DOI: 10.1093/jxb/erad179] [Citation(s) in RCA: 8] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/13/2022] [Accepted: 05/11/2023] [Indexed: 05/25/2023]
Abstract
Abiotic stresses such as drought and heat continue to impact crop production in a warming world. This review distinguishes seven inherent capacities that enable plants to respond to abiotic stresses and continue growing, although at a reduced rate, to achieve a productive yield. These are the capacities to selectively take up essential resources, store them and supply them to different plant parts, generate the energy required for cellular functions, conduct repairs to maintain plant tissues, communicate between plant parts, manage existing structural assets in the face of changed circumstances, and shape-shift through development to be efficient in different environments. By illustration, we show how all seven plant capacities are important for reproductive success of major crop species during drought, salinity, temperature extremes, flooding, and nutrient stress. Confusion about the term 'oxidative stress' is explained. This allows us to focus on the strategies that enhance plant adaptation by identifying key responses that can be targets for plant breeding.
Collapse
Affiliation(s)
- Rana Munns
- Australian Research Council Centre of Excellence in Plant Energy Biology, School of Molecular Sciences, University of Western Australia, 35 Stirling Highway, Crawley, WA 6009, Australia
| | - A Harvey Millar
- Australian Research Council Centre of Excellence in Plant Energy Biology, School of Molecular Sciences, University of Western Australia, 35 Stirling Highway, Crawley, WA 6009, Australia
| |
Collapse
|
5
|
Fgaier S, Aarrouf J, Lopez-Lauri F, Lizzi Y, Poiroux F, Urban L. Effect of high salinity and of priming of non-germinated seeds by UV-C light on photosynthesis of lettuce plants grown in a controlled soilless system. FRONTIERS IN PLANT SCIENCE 2023; 14:1198685. [PMID: 37469782 PMCID: PMC10352585 DOI: 10.3389/fpls.2023.1198685] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 04/01/2023] [Accepted: 06/14/2023] [Indexed: 07/21/2023]
Abstract
High salinity results in a decrease in plant photosynthesis and crop productivity. The aim of the present study was to evaluate the effect of UV-C priming treatments of lettuce seeds on photosynthesis of plants grown at high salinity. Non-primed and primed seeds were grown in an hydroponic system, with a standard nutrient solution, either supplemented with 100 mM NaCl (high salinity), or not (control). Considering that leaf and root K+ concentrations remained constant and that chlorophyll fluorescence parameters and root growth were not affected negatively in the high salinity treatment, we conclude that the latter was at the origin of a moderate stress only. A substantial decrease in leaf net photosynthetic assimilation (Anet) was however observed as a consequence of stomatal and non-stomatal limitations in the high salinity treatment. This decrease in Anet translated into a decrease in growth parameters; it may be attributed partially to the high salinity-associated increase in leaf concentration in abscisic acid and decrease in stomatal conductance. Priming by UV-C light resulted in an increase in total photosynthetic electron transport rate and Anet in the leaves of plants grown at high salinity. The increase of the latter translated into a moderate increase in growth parameters. It is hypothesized that the positive effect of UV-C priming on Anet and growth of the aerial part of lettuce plants grown at high salinity, is mainly due to its stimulating effect on leaf concentration in salicylic acid. Even though leaf cytokinins' concentration was higher in plants from primed seeds, maintenance of the cytokinins-to-abscisic acid ratio also supports the idea that UV-C priming resulted in protection of plants exposed to high salinity.
Collapse
Affiliation(s)
- Salah Fgaier
- Unité Propre de Recherche Innovante, Equipe de Recherche et d'Innovations Thématiques (ERIT) Plant Science, Interactions and Innovation, Avignon Université, Avignon, France
- Nova Genetic, Zone Anjou Actiparc de Jumelles, Longué-Jumelles, France
| | - Jawad Aarrouf
- Unité Propre de Recherche Innovante, Equipe de Recherche et d'Innovations Thématiques (ERIT) Plant Science, Interactions and Innovation, Avignon Université, Avignon, France
| | - Félicie Lopez-Lauri
- Unité Propre de Recherche Innovante, Equipe de Recherche et d'Innovations Thématiques (ERIT) Plant Science, Interactions and Innovation, Avignon Université, Avignon, France
| | - Yves Lizzi
- Unité Propre de Recherche Innovante, Equipe de Recherche et d'Innovations Thématiques (ERIT) Plant Science, Interactions and Innovation, Avignon Université, Avignon, France
| | - Florine Poiroux
- Nova Genetic, Zone Anjou Actiparc de Jumelles, Longué-Jumelles, France
| | - Laurent Urban
- Unité Propre de Recherche Innovante, Equipe de Recherche et d'Innovations Thématiques (ERIT) Plant Science, Interactions and Innovation, Avignon Université, Avignon, France
| |
Collapse
|
6
|
Sapakhova Z, Raissova N, Daurov D, Zhapar K, Daurova A, Zhigailov A, Zhambakin K, Shamekova M. Sweet Potato as a Key Crop for Food Security under the Conditions of Global Climate Change: A Review. PLANTS (BASEL, SWITZERLAND) 2023; 12:2516. [PMID: 37447081 DOI: 10.3390/plants12132516] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/01/2023] [Revised: 06/27/2023] [Accepted: 06/28/2023] [Indexed: 07/15/2023]
Abstract
Sweet potato is one of the most economically important crops for addressing global food security and climate change issues, especially under conditions of extensive agriculture, such as those found in developing countries. However, osmotic stress negatively impacts the agronomic and economic productivity of sweet potato cultivation by inducing several morphological, physiological, and biochemical changes. Plants employ many signaling pathways to respond to water stress by modifying their growth patterns, activating antioxidants, accumulating suitable solutes and chaperones, and making stress proteins. These physiological, metabolic, and genetic modifications can be employed as the best indicators for choosing drought-tolerant genotypes. The main objective of sweet potato breeding in many regions of the world, especially those affected by drought, is to obtain varieties that combine drought tolerance with high yields. In this regard, the study of the physiological and biochemical features of certain varieties is important for the implementation of drought resistance measures. Adapted genotypes can be selected and improved for particular growing conditions by using suitable tools and drought tolerance-related selection criteria. By regulating genetics in this way, the creation of drought-resistant varieties may become cost-effective for smallholder farmers. This review focuses on the drought tolerance mechanisms of sweet potato, the effects of drought stress on its productivity, its crop management strategies for drought mitigation, traditional and molecular sweet potato breeding methods for drought tolerance, and the use of biotechnological methods to increase the tolerance of sweet potato to drought.
Collapse
Affiliation(s)
- Zagipa Sapakhova
- Institute of Plant Biology and Biotechnology, Almaty 050040, Kazakhstan
| | - Nurgul Raissova
- Institute of Plant Biology and Biotechnology, Almaty 050040, Kazakhstan
| | - Dias Daurov
- Institute of Plant Biology and Biotechnology, Almaty 050040, Kazakhstan
| | - Kuanysh Zhapar
- Institute of Plant Biology and Biotechnology, Almaty 050040, Kazakhstan
| | - Ainash Daurova
- Institute of Plant Biology and Biotechnology, Almaty 050040, Kazakhstan
| | - Andrey Zhigailov
- M. Aitkhozhin Institute of Molecular Biology and Biochemistry, Almaty 050012, Kazakhstan
| | - Kabyl Zhambakin
- Institute of Plant Biology and Biotechnology, Almaty 050040, Kazakhstan
| | - Malika Shamekova
- Institute of Plant Biology and Biotechnology, Almaty 050040, Kazakhstan
| |
Collapse
|
7
|
Fleitas AL, Castro A, Blumwald E, Vidal S. Functional specialization of chloroplast vesiculation ( CV) duplicated genes from soybean shows partial overlapping roles during stress-induced or natural senescence. FRONTIERS IN PLANT SCIENCE 2023; 14:1184020. [PMID: 37346131 PMCID: PMC10280078 DOI: 10.3389/fpls.2023.1184020] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 03/10/2023] [Accepted: 05/12/2023] [Indexed: 06/23/2023]
Abstract
Soybean is a globally important legume crop which is highly sensitive to drought. The identification of genes of particular relevance for drought responses provides an important basis to improve tolerance to environmental stress. Chloroplast Vesiculation (CV) genes have been characterized in Arabidopsis and rice as proteins participating in a specific chloroplast-degradation vesicular pathway (CVV) during natural or stress-induced leaf senescence. Soybean genome contains two paralogous genes encoding highly similar CV proteins, CV1 and CV2. In this study, we found that expression of CV1 was differentially upregulated by drought stress in soybean contrasting genotypes exhibiting slow-wilting (tolerant) or fast-wilting (sensitive) phenotypes. CV1 reached higher induction levels in fast-wilting plants, suggesting a negative correlation between CV1 gene expression and drought tolerance. In contrast, autophagy (ATG8) and ATI-PS (ATI1) genes were induced to higher levels in slow-wilting plants, supporting a pro-survival role for these genes in soybean drought tolerance responses. The biological function of soybean CVs in chloroplast degradation was confirmed by analyzing the effect of conditional overexpression of CV2-FLAG fusions on the accumulation of specific chloroplast proteins. Functional specificity of CV1 and CV2 genes was assessed by analyzing their specific promoter activities in transgenic Arabidopsis expressing GUS reporter gene driven by CV1 or CV2 promoters. CV1 promoter responded primarily to abiotic stimuli (hyperosmolarity, salinity and oxidative stress), while the promoter of CV2 was predominantly active during natural senescence. Both promoters were highly responsive to auxin but only CV1 responded to other stress-related hormones, such as ABA, salicylic acid and methyl jasmonate. Moreover, the dark-induced expression of CV2, but not of CV1, was strongly inhibited by cytokinin, indicating similarities in the regulation of CV2 to the reported expression of Arabidopsis and rice CV genes. Finally, we report the expression of both CV1 and CV2 genes in roots of soybean and transgenic Arabidopsis, suggesting a role for the encoded proteins in root plastids. Together, the results indicate differential roles for CV1 and CV2 in development and in responses to environmental stress, and point to CV1 as a potential target for gene editing to improve crop performance under stress without compromising natural development.
Collapse
Affiliation(s)
- Andrea Luciana Fleitas
- Laboratorio de Biología Molecular Vegetal, Instituto de Química Biológica, Facultad de Ciencias, Universidad de la República, Montevideo, Uruguay
| | - Alexandra Castro
- Laboratorio de Biología Molecular Vegetal, Instituto de Química Biológica, Facultad de Ciencias, Universidad de la República, Montevideo, Uruguay
| | - Eduardo Blumwald
- Department of Plant Sciences, University of California, Davis, Davis, CA, United States
| | - Sabina Vidal
- Laboratorio de Biología Molecular Vegetal, Instituto de Química Biológica, Facultad de Ciencias, Universidad de la República, Montevideo, Uruguay
| |
Collapse
|
8
|
Padilla YG, Gisbert-Mullor R, Bueso E, Zhang L, Forment J, Lucini L, López-Galarza S, Calatayud Á. New Insights Into Short-term Water Stress Tolerance Through Transcriptomic and Metabolomic Analyses on Pepper Roots. PLANT SCIENCE : AN INTERNATIONAL JOURNAL OF EXPERIMENTAL PLANT BIOLOGY 2023; 333:111731. [PMID: 37196901 DOI: 10.1016/j.plantsci.2023.111731] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/22/2023] [Revised: 05/02/2023] [Accepted: 05/13/2023] [Indexed: 05/19/2023]
Abstract
In the current climate change scenario, water stress is a serious threat to limit crop growth and yields. It is necessary to develop tolerant plants that cope with water stress and, for this purpose, tolerance mechanisms should be studied. NIBER® is a proven water stress- and salt-tolerant pepper hybrid rootstock (Gisbert-Mullor et al., 2020; López-Serrano et al., 2020), but tolerance mechanisms remain unclear. In this experiment, NIBER® and A10 (a sensitive pepper accession (Penella et al., 2014)) response to short-term water stress at 5 h and 24 h was studied in terms of gene expression and metabolites content in roots. GO terms and gene expression analyses evidenced constitutive differences in the transcriptomic profile of NIBER® and A10, associated with detoxification systems of reactive oxygen species (ROS). Upon water stress, transcription factors like DREBs and MYC are upregulated and the levels of auxins, abscisic acid and jasmonic acid are increased in NIBER®. NIBER® tolerance mechanisms involve an increase in osmoprotectant sugars (i.e., trehalose, raffinose) and in antioxidants (spermidine), but lower contents of oxidized glutathione compared to A10, which indicates less oxidative damage. Moreover, the gene expression for aquaporins and chaperones is enhanced. These results show the main NIBER® strategies to overcome water stress.
Collapse
Affiliation(s)
- Yaiza Gara Padilla
- Centro de Citricultura y Producción Vegetal, Instituto Valenciano de Investigaciones Agrarias, CV-315, Km 10,7, Moncada, 46113 Valencia, Spain
| | - Ramón Gisbert-Mullor
- Departamento de Producción Vegetal, CVER, Universitat Politècnica de València, Camí de Vera s/n, 46022 Valencia, Spain
| | - Eduardo Bueso
- Instituto de Biología Molecular y Celular de Plantas (IBMCP), Universitat Politècnica de València-C.S.I.C., Valencia, Spain
| | - Leilei Zhang
- Department for Sustainable Food Process, Research Centre for Nutrigenomics and Proteomics, Università Cattolica del Sacro Cuore, 29122 Piacenza, Italy
| | - Javier Forment
- Instituto de Biología Molecular y Celular de Plantas (IBMCP), Universitat Politècnica de València-C.S.I.C., Valencia, Spain
| | - Luigi Lucini
- Department for Sustainable Food Process, Research Centre for Nutrigenomics and Proteomics, Università Cattolica del Sacro Cuore, 29122 Piacenza, Italy
| | - Salvador López-Galarza
- Departamento de Producción Vegetal, CVER, Universitat Politècnica de València, Camí de Vera s/n, 46022 Valencia, Spain
| | - Ángeles Calatayud
- Centro de Citricultura y Producción Vegetal, Instituto Valenciano de Investigaciones Agrarias, CV-315, Km 10,7, Moncada, 46113 Valencia, Spain.
| |
Collapse
|
9
|
Swain R, Sahoo S, Behera M, Rout GR. Instigating prevalent abiotic stress resilience in crop by exogenous application of phytohormones and nutrient. FRONTIERS IN PLANT SCIENCE 2023; 14:1104874. [PMID: 36844040 PMCID: PMC9947512 DOI: 10.3389/fpls.2023.1104874] [Citation(s) in RCA: 7] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/22/2022] [Accepted: 01/12/2023] [Indexed: 05/29/2023]
Abstract
In recent times, the demand for food and feed for the ever-increasing population has achieved unparalleled importance, which cannot afford crop yield loss. Now-a-days, the unpleasant situation of abiotic stress triggers crop improvement by affecting the different metabolic pathways of yield and quality advances worldwide. Abiotic stress like drought, salinity, cold, heat, flood, etc. in plants diverts the energy required for growth to prevent the plant from shock and maintain regular homeostasis. Hence, the plant yield is drastically reduced as the energy is utilized for overcoming the stress in plants. The application of phytohormones like the classical auxins, cytokinins, ethylene, and gibberellins, as well as more recent members including brassinosteroids, jasmonic acids, etc., along with both macro and micronutrients, have enhanced significant attention in creating key benefits such as reduction of ionic toxicity, improving oxidative stress, maintaining water-related balance, and gaseous exchange modification during abiotic stress conditions. Majority of phytohormones maintain homeostasis inside the cell by detoxifying the ROS and enhancing the antioxidant enzyme activities which can enhance tolerance in plants. At the molecular level, phytohormones activate stress signaling pathways or genes regulated by abscisic acid (ABA), salicylic acid (SA), Jasmonic acid (JA), and ethylene. The various stresses primarily cause nutrient deficiency and reduce the nutrient uptake of plants. The application of plant nutrients like N, K, Ca, and Mg are also involved in ROS scavenging activities through elevating antioxidants properties and finally decreasing cell membrane leakage and increasing the photosynthetic ability by resynthesizing the chlorophyll pigment. This present review highlighted the alteration of metabolic activities caused by abiotic stress in various crops, the changes of vital functions through the application of exogenous phytohormones and nutrition, as well as their interaction.
Collapse
Affiliation(s)
- Rinny Swain
- Department of Agricultural Biotechnology, Crop Improvement Division, School of Agriculture, Gandhi University of Engineering and Technology (GIET) University, Rayagada, Odisha, India
| | - Smrutishree Sahoo
- Department of Genetics and Plant Breeding, Crop Improvement Division, School of Agriculture, GIET University, Rayagada, Odisha, India
| | - Mamata Behera
- Department of Genetics and Plant Breeding, Crop Improvement Division, School of Agriculture, GIET University, Rayagada, Odisha, India
| | - Gyana Ranjan Rout
- Department of Agricultural Biotechnology, College of Agriculture, Odisha University of Agriculture and Technology, Bhubaneswar, Odisha, India
| |
Collapse
|
10
|
Fan S, Chen J, Yang R. Candidate Genes for Salt Tolerance in Forage Sorghum under Saline Conditions from Germination to Harvest Maturity. Genes (Basel) 2023; 14:genes14020293. [PMID: 36833220 PMCID: PMC9956952 DOI: 10.3390/genes14020293] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/03/2022] [Revised: 12/23/2022] [Accepted: 01/16/2023] [Indexed: 01/26/2023] Open
Abstract
To address the plant adaptability of sorghum (Sorghum bicolor) in salinity, the research focus should shift from only selecting tolerant varieties to understanding the precise whole-plant genetic coping mechanisms with long-term influence on various phenotypes of interest to expanding salinity, improving water use, and ensuring nutrient use efficiency. In this review, we discovered that multiple genes may play pleiotropic regulatory roles in sorghum germination, growth, and development, salt stress response, forage value, and the web of signaling networks. The conserved domain and gene family analysis reveals a remarkable functional overlap among members of the bHLH (basic helix loop helix), WRKY (WRKY DNA-binding domain), and NAC (NAM, ATAF1/2, and CUC2) superfamilies. Shoot water and carbon partitioning, for example, are dominated by genes from the aquaporins and SWEET families, respectively. The gibberellin (GA) family of genes is prevalent during pre-saline exposure seed dormancy breaking and early embryo development at post-saline exposure. To improve the precision of the conventional method of determining silage harvest maturity time, we propose three phenotypes and their underlying genetic mechanisms: (i) the precise timing of transcriptional repression of cytokinin biosynthesis (IPT) and stay green (stg1 and stg2) genes; (ii) the transcriptional upregulation of the SbY1 gene and (iii) the transcriptional upregulation of the HSP90-6 gene responsible for grain filling with nutritive biochemicals. This work presents a potential resource for sorghum salt tolerance and genetic studies for forage and breeding.
Collapse
|
11
|
Mandal S, Ghorai M, Anand U, Samanta D, Kant N, Mishra T, Rahman MH, Jha NK, Jha SK, Lal MK, Tiwari RK, Kumar M, Radha, Prasanth DA, Mane AB, Gopalakrishnan AV, Biswas P, Proćków J, Dey A. Cytokinin and abiotic stress tolerance -What has been accomplished and the way forward? Front Genet 2022; 13:943025. [PMID: 36017502 PMCID: PMC9395584 DOI: 10.3389/fgene.2022.943025] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/13/2022] [Accepted: 06/30/2022] [Indexed: 11/27/2022] Open
Abstract
More than a half-century has passed since it was discovered that phytohormone cytokinin (CK) is essential to drive cytokinesis and proliferation in plant tissue culture. Thereafter, cytokinin has emerged as the primary regulator of the plant cell cycle and numerous developmental processes. Lately, a growing body of evidence suggests that cytokinin has a role in mitigating both abiotic and biotic stress. Cytokinin is essential to defend plants against excessive light exposure and a unique kind of abiotic stress generated by an altered photoperiod. Secondly, cytokinin also exhibits multi-stress resilience under changing environments. Furthermore, cytokinin homeostasis is also affected by several forms of stress. Therefore, the diverse roles of cytokinin in reaction to stress, as well as its interactions with other hormones, are discussed in detail. When it comes to agriculture, understanding the functioning processes of cytokinins under changing environmental conditions can assist in utilizing the phytohormone, to increase productivity. Through this review, we briefly describe the biological role of cytokinin in enhancing the performance of plants growth under abiotic challenges as well as the probable mechanisms underpinning cytokinin-induced stress tolerance. In addition, the article lays forth a strategy for using biotechnological tools to modify genes in the cytokinin pathway to engineer abiotic stress tolerance in plants. The information presented here will assist in better understanding the function of cytokinin in plants and their effective investigation in the cropping system.
Collapse
Affiliation(s)
- Sayanti Mandal
- Institute of Bioinformatics and Biotechnology, Savitribai Phule Pune University, Pune, Maharashtra, India
| | - Mimosa Ghorai
- Department of Life Sciences, Presidency University, Kolkata, West Bengal, India
| | - Uttpal Anand
- CytoGene Research & Development LLP, Barabanki, Uttar Pradesh, India
| | - Dipu Samanta
- Department of Botany, Dr. Kanailal Bhattacharyya College, Howrah, West Bengal, India
| | - Nishi Kant
- School of Health and Allied Science, ARKA Jain University, Jamshedpur, Jharkhand, India
| | - Tulika Mishra
- Department of Botany, Deen Dayal Upadhyay Gorakhpur University, Gorakhpur, Uttar Pradesh, India
| | - Md. Habibur Rahman
- Department of Global Medical Science, Wonju College of Medicine, Yonsei University, Wonju, Gangwon-do, South Korea
| | - Niraj Kumar Jha
- Department of Biotechnology, School of Engineering and Technology, Sharda University, Greater Noida, Uttar Pradesh, India
- Department of Biotechnology Engineering and Food Technology, Chandigarh University, Mohali, India
- Department of Biotechnology, School of Applied and Life Sciences (SALS), Uttaranchal University, Dehradun, India
| | - Saurabh Kumar Jha
- Department of Biotechnology, School of Engineering and Technology, Sharda University, Greater Noida, Uttar Pradesh, India
- Department of Biotechnology Engineering and Food Technology, Chandigarh University, Mohali, India
- Department of Biotechnology, School of Applied and Life Sciences (SALS), Uttaranchal University, Dehradun, India
| | - Milan Kumar Lal
- Division of Crop Physiology, Biochemistry and Post Harvest Technology, ICAR-Central Potato Research Institute, Shimla, Himachal Pradesh, India
| | - Rahul Kumar Tiwari
- Division of Crop Physiology, Biochemistry and Post Harvest Technology, ICAR-Central Potato Research Institute, Shimla, Himachal Pradesh, India
| | - Manoj Kumar
- Chemical and Biochemical Processing Division, ICAR-Central Institute for Research on Cotton Technology, Mumbai, Maharashtra, India
| | - Radha
- School of Biological and Environmental Sciences, Shoolini University of Biotechnology and Management Sciences, Solan, Himachal Pradesh, India
| | | | - Abhijit Bhagwan Mane
- Department of Zoology, Dr. Patangrao Kadam Mahavidhyalaya (affiliated to Shivaji University Kolhapur), Ramanandnagar (Burli), Sangli, Maharashtra, India
| | - Abilash Valsala Gopalakrishnan
- Department of Biomedical Sciences, School of Biosciences and Technology, Vellore Institute of Technology (VIT), Vellore, Tamil Nadu, India
| | - Protha Biswas
- Department of Life Sciences, Presidency University, Kolkata, West Bengal, India
| | - Jarosław Proćków
- Department of Plant Biology, Institute of Environmental Biology, Wrocław University of Environmental and Life Sciences, Wrocław, Poland
| | - Abhijit Dey
- Department of Life Sciences, Presidency University, Kolkata, West Bengal, India
| |
Collapse
|
12
|
Song Y, Li C, Zhu Y, Guo P, Wang Q, Zhang L, Wang Z, Di H. Overexpression of ZmIPT2 gene delays leaf senescence and improves grain yield in maize. FRONTIERS IN PLANT SCIENCE 2022; 13:963873. [PMID: 35928712 PMCID: PMC9344930 DOI: 10.3389/fpls.2022.963873] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/08/2022] [Accepted: 06/28/2022] [Indexed: 06/01/2023]
Abstract
Cytokinins (CTKs) are a major phytohormone group that are significant in the promotion of cellular division, growth, and divergence. Isopentenyl transferase (IPT) regulates a rate-limiting step in plant CTK synthesis, promotes the synthesis of isopentenyl adenonucleotides from 5-AMP and isopentenyl pyrophosphate, and then converts both these chemicals into various CTKs. Here, the full-length cDNA of ZmIPT2, which encodes 322 amino acids, was isolated and was introduced into a maize inbred line by Agrobacterium-mediated transformation. In both controlled environments and field experiments, the overexpression of ZmIPT2 gene in the transformed plants delayed leaf senescence. Compared to the receptor line, the transgenic maize lines retained higher chlorophyll levels, photosynthetic rates, and cytokinin content for an extended period of time, and produced significantly higher grain yield by a margin of 17.71-20.29% under normal field planting conditions. Subsequently, ten possible genes that interacted with ZmIPT2 were analyzed by qRT-PCR, showing that the expression pattern of GRMZM2G022904 was consistent with ZmIPT2 expression. Through comprehensive analysis, we screened for transgenic lines with stable inheritance of ZmIPT2 gene, clear functional efficiency, and significant yield improvement, in order to provide theoretical basis and material support for the breeding of new high-yield transgenic maize varieties.
Collapse
|
13
|
Hai X, Mi J, Zhao B, Zhang B, Zhao Z, Liu J. Foliar Application of Spermidine Reduced the Negative Effects of Salt Stress on Oat Seedlings. FRONTIERS IN PLANT SCIENCE 2022; 13:846280. [PMID: 35519821 PMCID: PMC9062738 DOI: 10.3389/fpls.2022.846280] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 12/31/2021] [Accepted: 02/17/2022] [Indexed: 06/14/2023]
Abstract
The effects of foliar application of spermidine (Spd) on the physiological aspects of salt-stressed oat seedlings were studied under greenhouse conditions. At the seedling stage, the salt-sensitive variety, namely, Caoyou 1 and the salt-tolerant variety, namely, Baiyan 2 were treated with 70 and 100 mM of salt, followed by the foliar application of 0.75 mM Spd or distilled water. Results showed that Spd application increased the activities of superoxide dismutase (SOD), peroxidase (POD), catalase (CAT), and ascorbate peroxidase (APX), and reduced the rate of O2 ⋅- production and the accumulation of H2O2 and malondialdehyde (MDA). In addition, it increased the level of zeatin riboside (ZR) and the content of endogenous polyamines. The application of Spd increased the contents of soluble sugar, soluble protein, and free proline and helped maintain the osmotic balance of oat leaves. At the same time, foliar Spd treatment helped in maintaining the ion nutrition balance. Specifically, it reduced the content of Na+ and thereby stabilized the ratio of Na+/K+, Na+/Ca2+, and Na+/Mg2+. The effects of Spd application were more obvious for the salt-sensitive cultivar Caoyou 1 and under the lighter 70 mM salt stress.
Collapse
Affiliation(s)
- Xia Hai
- Science Innovation Team of Oats, Inner Mongolia Agricultural University, Hohhot, China
| | - Junzhen Mi
- Science Innovation Team of Oats, Inner Mongolia Agricultural University, Hohhot, China
| | - Baoping Zhao
- Science Innovation Team of Oats, Inner Mongolia Agricultural University, Hohhot, China
| | - Biru Zhang
- Science Innovation Team of Oats, Inner Mongolia Agricultural University, Hohhot, China
| | - Zhou Zhao
- College of Life Science, Chifeng University, Chifeng, China
| | - Jinghui Liu
- Science Innovation Team of Oats, Inner Mongolia Agricultural University, Hohhot, China
| |
Collapse
|
14
|
Kurepa J, Smalle JA. Auxin/Cytokinin Antagonistic Control of the Shoot/Root Growth Ratio and Its Relevance for Adaptation to Drought and Nutrient Deficiency Stresses. Int J Mol Sci 2022; 23:ijms23041933. [PMID: 35216049 PMCID: PMC8879491 DOI: 10.3390/ijms23041933] [Citation(s) in RCA: 7] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/01/2022] [Revised: 02/05/2022] [Accepted: 02/07/2022] [Indexed: 01/19/2023] Open
Abstract
The hormones auxin and cytokinin regulate numerous aspects of plant development and often act as an antagonistic hormone pair. One of the more striking examples of the auxin/cytokinin antagonism involves regulation of the shoot/root growth ratio in which cytokinin promotes shoot and inhibits root growth, whereas auxin does the opposite. Control of the shoot/root growth ratio is essential for the survival of terrestrial plants because it allows growth adaptations to water and mineral nutrient availability in the soil. Because a decrease in shoot growth combined with an increase in root growth leads to survival under drought stress and nutrient limiting conditions, it was not surprising to find that auxin promotes, while cytokinin reduces, drought stress tolerance and nutrient uptake. Recent data show that drought stress and nutrient availability also alter the cytokinin and auxin signaling and biosynthesis pathways and that this stress-induced regulation affects cytokinin and auxin in the opposite manner. These antagonistic effects of cytokinin and auxin suggested that each hormone directly and negatively regulates biosynthesis or signaling of the other. However, a growing body of evidence supports unidirectional regulation, with auxin emerging as the primary regulatory component. This master regulatory role of auxin may not come as a surprise when viewed from an evolutionary perspective.
Collapse
|
15
|
Lopez-Delacalle M, Camejo D, Garcia-Marti M, Lopez-Ramal MJ, Nortes PA, Martinez V, Rivero RM. Deciphering fruit sugar transport and metabolism from tolerant and sensitive tomato plants subjected to simulated field conditions. PHYSIOLOGIA PLANTARUM 2021; 173:1715-1728. [PMID: 33547642 DOI: 10.1111/ppl.13355] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/17/2020] [Revised: 12/22/2020] [Accepted: 01/27/2021] [Indexed: 06/12/2023]
Abstract
In the current state of climate change, we must assume that abiotic stresses act together under natural field conditions, these will increase in the coming years. Therefore, in this report we investigated how sugar metabolism was affected under simulated field conditions, where plants faced high ambient temperatures and a low-quality water irrigation. Our studies were carried out on fruits of two tomato recombinant lines, a tolerant and a sensitive one exposed to the combination of heat and salinity. Two ripening stages (mature green and red ripe fruits) were used in our analyzes, where the gene expression levels of the main biosynthetic genes and transporters, enzymatic activities and compounds related to the synthesis, accumulation, and degradation of sugars in plants were analyzed. The tolerant line showed highly significant differences in red ripe fruits in comparison to the sensitive one under the simulated field conditions (35°C + 60 mM NaCl), with an overexpression of the genes SlFBP, SlSPS, SlSUS3, and SlNi. These expression patterns correlated with a higher activity of the enzymes FBP, SPS, SUS3, AI, and G6PDH, which resulted in the accumulation of fructose, glucose and UDP-glucose. Our results showed the advantage of using tomato recombinant lines for rescuing important traits, such as the resistance to some abiotic stresses, and for the identification of important molecular and metabolic markers that could be used to determine fruit quality in green or red maturity stages under detrimental environmental field conditions.
Collapse
Affiliation(s)
- Maria Lopez-Delacalle
- CEBAS-CSIC, Department of Plant Nutrition, Campus Universitario Espinardo, Espinardo, Spain
| | - Daymi Camejo
- CEBAS-CSIC, Department of Plant Nutrition, Campus Universitario Espinardo, Espinardo, Spain
| | - Maria Garcia-Marti
- CEBAS-CSIC, Department of Plant Nutrition, Campus Universitario Espinardo, Espinardo, Spain
| | - Maria Jose Lopez-Ramal
- CEBAS-CSIC, Department of Plant Nutrition, Campus Universitario Espinardo, Espinardo, Spain
| | - Pedro A Nortes
- CEBAS-CSIC, Department of Irrigation, Campus Universitario Espinardo, Espinardo, Spain
| | - Vicente Martinez
- CEBAS-CSIC, Department of Plant Nutrition, Campus Universitario Espinardo, Espinardo, Spain
| | - Rosa M Rivero
- CEBAS-CSIC, Department of Plant Nutrition, Campus Universitario Espinardo, Espinardo, Spain
| |
Collapse
|
16
|
Nguyen HN, Lai N, Kisiala AB, Emery RJN. Isopentenyltransferases as master regulators of crop performance: their function, manipulation, and genetic potential for stress adaptation and yield improvement. PLANT BIOTECHNOLOGY JOURNAL 2021; 19:1297-1313. [PMID: 33934489 PMCID: PMC8313133 DOI: 10.1111/pbi.13603] [Citation(s) in RCA: 16] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/27/2020] [Revised: 03/23/2021] [Accepted: 04/11/2021] [Indexed: 05/27/2023]
Abstract
Isopentenyltransferase (IPT) in plants regulates a rate-limiting step of cytokinin (CTK) biosynthesis. IPTs are recognized as key regulators of CTK homeostasis and phytohormone crosstalk in both biotic and abiotic stress responses. Recent research has revealed the regulatory function of IPTs in gene expression and metabolite profiles including source-sink modifications, energy metabolism, nutrient allocation and storage, stress defence and signalling pathways, protein synthesis and transport, and membrane transport. This suggests that IPTs play a crucial role in plant growth and adaptation. In planta studies of IPT-driven modifications indicate that, at a physiological level, IPTs improve stay-green characteristics, delay senescence, reduce stress-induced oxidative damage and protect photosynthetic machinery. Subsequently, these improvements often manifest as enhanced or stabilized crop yields and this is especially apparent under environmental stress. These mechanisms merit consideration of the IPTs as 'master regulators' of core cellular metabolic pathways, thus adjusting plant homeostasis/adaptive responses to altered environmental stresses, to maximize yield potential. If their expression can be adequately controlled, both spatially and temporally, IPTs can be a key driver for seed yield. In this review, we give a comprehensive overview of recent findings on how IPTs influence plant stress physiology and yield, and we highlight areas for future research.
Collapse
Affiliation(s)
| | - Nhan Lai
- School of BiotechnologyVietnam National UniversityHo Chi Minh CityVietnam
| | | | | |
Collapse
|
17
|
Jogawat A, Yadav B, Lakra N, Singh AK, Narayan OP. Crosstalk between phytohormones and secondary metabolites in the drought stress tolerance of crop plants: A review. PHYSIOLOGIA PLANTARUM 2021; 172:1106-1132. [PMID: 33421146 DOI: 10.1111/ppl.13328] [Citation(s) in RCA: 86] [Impact Index Per Article: 28.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/29/2020] [Revised: 11/08/2020] [Accepted: 01/01/2021] [Indexed: 05/21/2023]
Abstract
Drought stress negatively affects crop performance and weakens global food security. It triggers the activation of downstream pathways, mainly through phytohormones homeostasis and their signaling networks, which further initiate the biosynthesis of secondary metabolites (SMs). Roots sense drought stress, the signal travels to the above-ground tissues to induce systemic phytohormones signaling. The systemic signals further trigger the biosynthesis of SMs and stomatal closure to prevent water loss. SMs primarily scavenge reactive oxygen species (ROS) to protect plants from lipid peroxidation and also perform additional defense-related functions. Moreover, drought-induced volatile SMs can alert the plant tissues to perform drought stress mitigating functions in plants. Other phytohormone-induced stress responses include cell wall and cuticle thickening, root and leaf morphology alteration, and anatomical changes of roots, stems, and leaves, which in turn minimize the oxidative stress, water loss, and other adverse effects of drought. Exogenous applications of phytohormones and genetic engineering of phytohormones signaling and biosynthesis pathways mitigate the drought stress effects. Direct modulation of the SMs biosynthetic pathway genes or indirect via phytohormones' regulation provides drought tolerance. Thus, phytohormones and SMs play key roles in plant development under the drought stress environment in crop plants.
Collapse
Affiliation(s)
| | - Bindu Yadav
- School of Environmental Sciences, Jawaharlal Nehru University, New Delhi, India
| | - Nita Lakra
- Department of Biotechnology, Chaudhary Charan Singh Haryana Agricultural University, Hisar, India
| | - Amit Kumar Singh
- School of Plant Sciences and Food Security, Tel Aviv University, Tel Aviv, Israel
| | - Om Prakash Narayan
- Biomedical Engineering Department, Tufts University, Medford, Massachusetts, USA
| |
Collapse
|
18
|
Chen L, Zhao J, Song J, Jameson PE. Cytokinin glucosyl transferases, key regulators of cytokinin homeostasis, have potential value for wheat improvement. PLANT BIOTECHNOLOGY JOURNAL 2021; 19:878-896. [PMID: 33811433 PMCID: PMC8131048 DOI: 10.1111/pbi.13595] [Citation(s) in RCA: 9] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/18/2020] [Accepted: 03/28/2021] [Indexed: 05/05/2023]
Abstract
The cytokinins, which are N6 -substituted adenine derivatives, control key aspects of crop productivity. Cytokinin levels are controlled via biosynthesis by isopentenyl transferase (IPT), destruction by cytokinin oxidase/dehydrogenase (CKX), and inactivation via glucosylation by cytokinin glucosyl transferases (CGTs). While both yield components and tolerance to drought and related abiotic stressors have been positively addressed via manipulation of IPT and/or CKX expression, much less attention has been paid to the CGTs. As naming of the CGTs has been unclear, we suggest COGT, CNGT, CONGT and CNOGT to describe the O-, N- and dual function CGTs. As specific CGT mutants of both rice and arabidopsis showed impacts on yield components, we interrogated the wheat genome database, IWGSC RefSeq v1.0 & v2.0, to investigate wheat CGTs. Besides providing unambiguous names for the 53 wheat CGTs, we show their expression patterns in 70 developmental tissues and their response characteristics to various stress conditions by reviewing more than 1000 RNA-seq data sets. These revealed various patterns of responses and showed expression generally being more limited in reproductive tissues than in vegetative tissues. Multiple cis-regulatory elements are present in the 3 kb upstream of the start codons of the 53 CGTs. Elements associated with abscisic acid, light and methyl jasmonate are particularly over-represented, indicative of the responsiveness of CGTs to the environment. These data sets indicate that CGTs have potential value for wheat improvement and that these could be targeted in TILLING or gene editing wheat breeding programmes.
Collapse
Affiliation(s)
- Lei Chen
- School of Life SciencesYantai UniversityYantaiChina
| | - Jing Zhao
- School of Life SciencesYantai UniversityYantaiChina
| | | | - Paula E. Jameson
- School of Life SciencesYantai UniversityYantaiChina
- School of Biological SciencesUniversity of CanterburyChristchurchNew Zealand
| |
Collapse
|
19
|
Tadaiesky LBA, da Silva BRS, Batista BL, Lobato AKDS. Brassinosteroids trigger tolerance to iron toxicity in rice. PHYSIOLOGIA PLANTARUM 2021; 171:371-387. [PMID: 33090462 DOI: 10.1111/ppl.13230] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/02/2020] [Revised: 10/05/2020] [Accepted: 10/06/2020] [Indexed: 06/11/2023]
Abstract
Iron (Fe) toxicity is one of the most frequent abiotic stresses in rice, as it affects from 15% to 30% of the total production. Brassinosteroids (BRs), including 24-epibrassinolide (EBR), regulate ion homeostasis and improve the antioxidant system. The aim of this research was to determine whether EBR can contribute to the tolerance of rice plants exposed to Fe toxicity and to evaluate the possible effect on anatomical characteristics, nutrient concentrations, the antioxidant system, and gas exchange. The experiment was randomized with four treatments, two with different concentrations of Fe (250 and 6250 μM, control and toxicity, respectively) and these were either supplied with EBR or not (0 and 10 nM EBR, described as -EBR and +EBR, respectively). Treating plants grown under Fe toxic conditions with EBR caused an 70% increase in root aerenchyma area, compared to plants without steroid treatment. Our results revealed that EBR treatment could mitigate the deleterious effects of Fe toxicity in rice plants, by modulating the aerenchyma area, which contributes to the formation of an oxidative barrier and reduce the Fe mobilization at the root surface. Plants that were exposed to Fe toxic concentrations and treated with EBR showed (1) an increase in the enzyme activities of superoxide dismutase, catalase, ascorbate peroxidase and peroxidase, (2) mitigation of oxidative damage and (3) increased scavenging of reactive oxygen species. Finally, EBR alleviated the negative impacts induced by excess Fe on the net photosynthetic rate and the instantaneous carboxylation efficiency. These benefits were directly related to higher electron transport and stomatal density and indirectly linked to the protection mechanism exercised by the antioxidant enzymes on photosynthetic machinery. We conclude that EBR is able to confer tolerance to Fe toxicity in rice plants.
Collapse
Affiliation(s)
- Lorene B A Tadaiesky
- Núcleo de Pesquisa Vegetal Básica e Aplicada, Universidade Federal Rural da Amazônia, Paragominas, Brazil
| | - Breno R S da Silva
- Núcleo de Pesquisa Vegetal Básica e Aplicada, Universidade Federal Rural da Amazônia, Paragominas, Brazil
| | - Bruno Lemos Batista
- Centro de Ciências Naturais e Humanas, Universidade Federal do ABC, São Paulo, Brazil
| | - Allan K da S Lobato
- Núcleo de Pesquisa Vegetal Básica e Aplicada, Universidade Federal Rural da Amazônia, Paragominas, Brazil
| |
Collapse
|
20
|
Research Progress on the Roles of Cytokinin in Plant Response to Stress. Int J Mol Sci 2020; 21:ijms21186574. [PMID: 32911801 PMCID: PMC7555750 DOI: 10.3390/ijms21186574] [Citation(s) in RCA: 26] [Impact Index Per Article: 6.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/16/2020] [Revised: 09/02/2020] [Accepted: 09/03/2020] [Indexed: 01/05/2023] Open
Abstract
Cytokinins promote plant growth and development under normal plant growth conditions and also play an important role in plant resistance to stress. Understanding the working mechanisms of cytokinins under adverse conditions will help to make full use of cytokinins in agriculture to increase production and efficiency of land use. In this article, we review the progress that has been made in cytokinin research in plant response to stress and propose its future application prospects.
Collapse
|
21
|
Song T, Yang F, Das D, Chen M, Hu Q, Tian Y, Cheng C, Liu Y, Zhang J. Transcriptomic analysis of photosynthesis‐related genes regulated by alternate wetting and drying irrigation in flag leaves of rice. Food Energy Secur 2020. [DOI: 10.1002/fes3.221] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/12/2023] Open
Affiliation(s)
- Tao Song
- Shenzhen Research Institute The Chinese University of Hong Kong Shenzhen China
| | - Feng Yang
- Shenzhen Research Institute The Chinese University of Hong Kong Shenzhen China
| | - Debatosh Das
- Shenzhen Research Institute The Chinese University of Hong Kong Shenzhen China
| | - Moxian Chen
- Shenzhen Research Institute The Chinese University of Hong Kong Shenzhen China
- Southern Regional Collaborative Innovation Center for Grain and Oil Crops in China Hunan Agricultural University Changsha China
| | - Qijuan Hu
- Shenzhen Research Institute The Chinese University of Hong Kong Shenzhen China
| | - Yuan Tian
- Shenzhen Research Institute The Chinese University of Hong Kong Shenzhen China
| | - Chaolin Cheng
- Shenzhen Research Institute The Chinese University of Hong Kong Shenzhen China
| | - Yue Liu
- Shenzhen Research Institute The Chinese University of Hong Kong Shenzhen China
| | - Jianhua Zhang
- Department of Biology Hong Kong Baptist University Kowloon Hong Kong
- School of Life Sciences and State Key Laboratory of Agrobiotechnology The Chinese University of Hong Kong Shatin Hong Kong
| |
Collapse
|
22
|
Tiwari S, Prasad SM. Regulation of insecticide toxicity by kinetin in two paddy field cyanobacteria: Physiological and biochemical assessment. ENVIRONMENTAL POLLUTION (BARKING, ESSEX : 1987) 2020; 259:113806. [PMID: 31891913 DOI: 10.1016/j.envpol.2019.113806] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/17/2019] [Revised: 12/09/2019] [Accepted: 12/10/2019] [Indexed: 06/10/2023]
Abstract
The imprudent agricultural practices are leading to an increasing load of pesticides in agricultural fields. Thus, there is a need to minimize the harmful effect of pesticides by adopting sustainable strategies. In the recent past decade, kinetin, a plant synthetic hormone, has been reported as a pesticide toxicity alleviator in higher plants. But its role in mitigating pesticide toxicity in cyanobacteria is still limited. Thus, in current study an attempt has been made to investigate the potential of kinetin in regulating cypermethrin, an insecticide, induced toxicity in Anabaena PCC 7120 and Nostoc muscorum ATCC 27893. Cypermethrin (Cyp1; 2 μg ml-1 and Cyp2; 4 μg ml-1) showed negative impact on growth, photosynthetic pigments, photosynthetic O2-evolution and primary photochemistry of PS II (Phi_P0, Psi_0, Phi_E0) resulting in decrease in performance index (PIABS). However, under similar conditions, increases in energy flux parameters (ABS/RC, TR0/RC, ET0/RC and DI0/RC) were noticed. Cypermethrin at both the doses enhanced the level of oxidative stress biomarkers (SOR, H2O2, and MDA equivalent contents) despite of increased antioxidant enzymatic activity (SOD, POD, CAT and GST).Under similar condition, cypermethrin at tested doses caused substantial decrease in non-enzymatic antioxidant contents (proline, cysteine and NP-SH). Nevertheless, kinetin treatment attenuated cypermethrin induced oxidative stress by further up-regulating the activity of enzymatic antioxidants and by enhancing the contents of non-enzymatic antioxidants. Thus, with the application of kinetin improved photochemistry of PS II and growth yield of both the cyanobacteria were observed even in the presence of cypermethrin. Current results establish that cypermethrin induces toxicity on photosynthesis, photosynthetic pigments and growth, and this effect was more pronounced in Anabaena PCC 7120 than Nostoc muscorum ATCC 27893. Furthermore, the potential role of kinetin in mitigating the toxicity of cypermethrin in both the cyanobacteria provides an insight to be used in paddy fields for sustainable agricultural practices.
Collapse
Affiliation(s)
- Santwana Tiwari
- Ranjan Plant Physiology and Biochemistry Laboratory, Department of Botany, University of Allahabad, Allahabad, 211002, India.
| | - Sheo Mohan Prasad
- Ranjan Plant Physiology and Biochemistry Laboratory, Department of Botany, University of Allahabad, Allahabad, 211002, India.
| |
Collapse
|
23
|
Hai NN, Chuong NN, Tu NHC, Kisiala A, Hoang XLT, Thao NP. Role and Regulation of Cytokinins in Plant Response to Drought Stress. PLANTS (BASEL, SWITZERLAND) 2020; 9:E422. [PMID: 32244272 PMCID: PMC7238249 DOI: 10.3390/plants9040422] [Citation(s) in RCA: 44] [Impact Index Per Article: 11.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 03/03/2020] [Revised: 03/12/2020] [Accepted: 03/27/2020] [Indexed: 01/04/2023]
Abstract
Cytokinins (CKs) are key phytohormones that not only regulate plant growth and development but also mediate plant tolerance to drought stress. Recent advances in genome-wide association studies coupled with in planta characterization have opened new avenues to investigate the drought-responsive expression of CK metabolic and signaling genes, as well as their functions in plant adaptation to drought. Under water deficit, CK signaling has evolved as an inter-cellular communication network which is essential to crosstalk with other types of phytohormones and their regulating pathways in mediating plant stress response. In this review, we revise the current understanding of CK involvement in drought stress tolerance. Particularly, a genetic framework for CK signaling and CK crosstalk with abscisic acid (ABA) in the precise monitoring of drought responses is proposed. In addition, the potential of endogenous CK alteration in crops towards developing drought-tolerant crops is also discussed.
Collapse
Affiliation(s)
- Nguyen Ngoc Hai
- Applied Biotechnology for Crop Development Research Unit, School of Biotechnology, International University, Ho Chi Minh City 700000, Vietnam; (N.N.H.); (N.N.C.); (N.H.C.T.)
- Vietnam National University, Ho Chi Minh City 700000, Vietnam
- Environmental and Life Science, Trent University, Peterborough, ON K9L 0G2 Canada
| | - Nguyen Nguyen Chuong
- Applied Biotechnology for Crop Development Research Unit, School of Biotechnology, International University, Ho Chi Minh City 700000, Vietnam; (N.N.H.); (N.N.C.); (N.H.C.T.)
- Vietnam National University, Ho Chi Minh City 700000, Vietnam
| | - Nguyen Huu Cam Tu
- Applied Biotechnology for Crop Development Research Unit, School of Biotechnology, International University, Ho Chi Minh City 700000, Vietnam; (N.N.H.); (N.N.C.); (N.H.C.T.)
- Vietnam National University, Ho Chi Minh City 700000, Vietnam
| | - Anna Kisiala
- Department of Biology, Trent University, Peterborough, ON K9L 0G2, Canada;
| | - Xuan Lan Thi Hoang
- Applied Biotechnology for Crop Development Research Unit, School of Biotechnology, International University, Ho Chi Minh City 700000, Vietnam; (N.N.H.); (N.N.C.); (N.H.C.T.)
- Vietnam National University, Ho Chi Minh City 700000, Vietnam
| | - Nguyen Phuong Thao
- Applied Biotechnology for Crop Development Research Unit, School of Biotechnology, International University, Ho Chi Minh City 700000, Vietnam; (N.N.H.); (N.N.C.); (N.H.C.T.)
- Vietnam National University, Ho Chi Minh City 700000, Vietnam
| |
Collapse
|
24
|
Lopez-Delacalle M, Camejo DM, García-Martí M, Nortes PA, Nieves-Cordones M, Martínez V, Rubio F, Mittler R, Rivero RM. Using Tomato Recombinant Lines to Improve Plant Tolerance to Stress Combination Through a More Efficient Nitrogen Metabolism. FRONTIERS IN PLANT SCIENCE 2020; 10:1702. [PMID: 32038679 PMCID: PMC6983915 DOI: 10.3389/fpls.2019.01702] [Citation(s) in RCA: 12] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/16/2019] [Accepted: 12/03/2019] [Indexed: 05/18/2023]
Abstract
The development of plant varieties with a better nitrogen use efficiency (NUE) is a means for modern agriculture to decrease environmental pollution due to an excess of nitrate and to maintain a sufficient net income. However, the optimum environmental conditions for agriculture will tend to be more adverse in the coming years, with increases in temperatures, water scarcity, and salinity being the most important productivity constrains for plants. NUE is inherently a complex trait, as each step, including N uptake, translocation, assimilation, and remobilization, is governed by multiple interacting genetic and environmental factors. In this study, two recombinant inbred lines (RIL-66 and RIL-76) from a cross between Solanum lycopersicum and Solanum pimpinellifoilum with different degree of tolerance to the combination of salinity and heat were subjected to a physiological, ionomic, amino acid profile, and gene expression study to better understand how nitrogen metabolism is affected in tolerant plants as compared to sensitive ones. The ionomics results showed a different profile between the two RILs, with K+ and Mg2+ being significantly lower in RIL-66 (low tolerant) as compared to RIL-76 (high tolerant) under salinity and heat combination. No differences were shown between the two RILs in N total content; however, N-NO3 - was significantly higher in RIL-66, whereas N-Norg was lower as compared to the other genotype, which could be correlated with its tolerance to the combination of salinity and heat. Total proteins and total amino acid concentration were significantly higher in RIL-76 as compared to the sensitive recombinant line under these conditions. Glutamate, but more importantly glutamine, was also highly synthesized and accumulated in RIL-76 under the combination of salinity and heat, which was in agreement with the upregulation of the nitrogen metabolism related transcripts studied (SlNR, SlNiR, SlGDH, SlGLT1, SlNRT1.2, SlAMT1, and SlAMT2). This study emphasized the importance of studying abiotic stress in combination and how recombinant material with different degrees of tolerance can be highly important for the improvement of nitrogen use efficiency in horticultural plants through the targeting of N-related markers.
Collapse
Affiliation(s)
| | | | | | | | | | | | | | - Ron Mittler
- The Division of Plant Sciences, College of Agriculture, Food and Natural Resources, Christopher S. Bond Life Sciences Center, University of Missouri, Columbia, MO, United States
- University of Missouri School of Medicine, Christopher S. Bond Life Sciences Center, University of Missouri, Columbia, MO, United States
| | - Rosa M. Rivero
- Department of Plant Nutrition, CEBAS-CSIC, Murcia, Spain
| |
Collapse
|
25
|
Muhammad I, Shalmani A, Ali M, Yang QH, Ahmad H, Li FB. Mechanisms Regulating the Dynamics of Photosynthesis Under Abiotic Stresses. FRONTIERS IN PLANT SCIENCE 2020; 11:615942. [PMID: 33584756 PMCID: PMC7876081 DOI: 10.3389/fpls.2020.615942] [Citation(s) in RCA: 87] [Impact Index Per Article: 21.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/10/2020] [Accepted: 12/28/2020] [Indexed: 05/02/2023]
Abstract
Photosynthesis sustains plant life on earth and is indispensable for plant growth and development. Factors such as unfavorable environmental conditions, stress regulatory networks, and plant biochemical processes limits the photosynthetic efficiency of plants and thereby threaten food security worldwide. Although numerous physiological approaches have been used to assess the performance of key photosynthetic components and their stress responses, though, these approaches are not extensive enough and do not favor strategic improvement of photosynthesis under abiotic stresses. The decline in photosynthetic capacity of plants due to these stresses is directly associated with reduction in yield. Therefore, a detailed information of the plant responses and better understanding of the photosynthetic machinery could help in developing new crop plants with higher yield even under stressed environments. Interestingly, cracking of signaling and metabolic pathways, identification of some key regulatory elements, characterization of potential genes, and phytohormone responses to abiotic factors have advanced our knowledge related to photosynthesis. However, our understanding of dynamic modulation of photosynthesis under dramatically fluctuating natural environments remains limited. Here, we provide a detailed overview of the research conducted on photosynthesis to date, and highlight the abiotic stress factors (heat, salinity, drought, high light, and heavy metal) that limit the performance of the photosynthetic machinery. Further, we reviewed the role of transcription factor genes and various enzymes involved in the process of photosynthesis under abiotic stresses. Finally, we discussed the recent progress in the field of biodegradable compounds, such as chitosan and humic acid, and the effect of melatonin (bio-stimulant) on photosynthetic activity. Based on our gathered researched data set, the logical concept of photosynthetic regulation under abiotic stresses along with improvement strategies will expand and surely accelerate the development of stress tolerance mechanisms, wider adaptability, higher survival rate, and yield potential of plant species.
Collapse
Affiliation(s)
- Izhar Muhammad
- State Key Laboratory of Crop Stress Biology for Arid Areas, College of Agronomy, Northwest A&F University, Yangling, China
- State Key Laboratory of Crop Stress Biology for Arid Areas, College of Life Sciences, Northwest A&F University, Yangling, China
| | - Abdullah Shalmani
- State Key Laboratory of Crop Stress Biology for Arid Areas, College of Life Sciences, Northwest A&F University, Yangling, China
| | - Muhammad Ali
- Department of Horticulture, Zhejiang University, Hangzhou, China
| | - Qing-Hua Yang
- State Key Laboratory of Crop Stress Biology for Arid Areas, College of Agronomy, Northwest A&F University, Yangling, China
| | - Husain Ahmad
- College of Horticulture, Northwest A&F University, Yangling, China
| | - Feng Bai Li
- State Key Laboratory of Crop Stress Biology for Arid Areas, College of Agronomy, Northwest A&F University, Yangling, China
- *Correspondence: Feng Bai Li
| |
Collapse
|
26
|
Gujjar RS, Supaibulwatana K. The Mode of Cytokinin Functions Assisting Plant Adaptations to Osmotic Stresses. PLANTS (BASEL, SWITZERLAND) 2019; 8:E542. [PMID: 31779090 PMCID: PMC6963579 DOI: 10.3390/plants8120542] [Citation(s) in RCA: 20] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 10/01/2019] [Revised: 10/29/2019] [Accepted: 11/01/2019] [Indexed: 01/15/2023]
Abstract
Plants respond to abiotic stresses by activating a specific genetic program that supports survival by developing robust adaptive mechanisms. This leads to accelerated senescence and reduced growth, resulting in negative agro-economic impacts on crop productivity. Cytokinins (CKs) customarily regulate various biological processes in plants, including growth and development. In recent years, cytokinins have been implicated in adaptations to osmotic stresses with improved plant growth and yield. Endogenous CK content under osmotic stresses can be enhanced either by transforming plants with a bacterial isopentenyl transferase (IPT) gene under the control of a stress inducible promoter or by exogenous application of synthetic CKs. CKs counteract osmotic stress-induced premature senescence by redistributing soluble sugars and inhibiting the expression of senescence-associated genes. Elevated CK contents under osmotic stress antagonize abscisic acid (ABA) signaling and ABA mediated responses, delay leaf senescence, reduce reactive oxygen species (ROS) damage and lipid peroxidation, improve plant growth, and ameliorate osmotic stress adaptability in plants.
Collapse
Affiliation(s)
- Ranjit Singh Gujjar
- Department of Biotechnology, Faculty of Science, Mahidol University, Bangkok 10400, Thailand;
- Division of Crop Improvement, Indian Institute of Sugarcane Research, Lucknow 226002, India
| | | |
Collapse
|
27
|
Pérez-Llorca M, Casadesús A, Munné-Bosch S, Müller M. Contrasting patterns of hormonal and photoprotective isoprenoids in response to stress in Cistus albidus during a Mediterranean winter. PLANTA 2019; 250:1409-1422. [PMID: 31286198 DOI: 10.1007/s00425-019-03234-y] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/15/2019] [Accepted: 07/03/2019] [Indexed: 06/09/2023]
Abstract
Seasonal accumulation of hormonal and photoprotective isoprenoids, particularly α-tocopherol, carotenoids and abscisic acid, indicate their important role in protecting Cistus albidus plants from environmental stress during a Mediterranean winter. The high diurnal amounts of α-tocopherol and xanthophylls 3 h before maximum light intensity suggest a photoprotective response against the prevailing diurnal changes. The timing to modulate acclimatory/defense responses under changing environmental conditions is one of the most critical points for plant fitness and stress tolerance. Here, we report seasonal and diurnal changes in the contents of isoprenoids originated from the methylerythritol phosphate pathway, including chlorophylls, carotenoids, tocochromanols, and phytohormones (abscisic acid, cytokinins, and gibberellins) in C. albidus during a Mediterranean winter. Plants were subjected not only to typically low winter temperatures but also to drought, as shown by a mean plant water status of 54% during the experimental period. The maximum PSII efficiency, however, remained consistently high (Fv/Fm > 0.8), proving that C. albidus had efficient mechanisms to tolerate combined stress conditions during winter. While seasonal α-tocopherol contents remained high (200-300 µg/g DW) during the experimental period, carotenoid contents increased during winter attaining maximum levels in February (minimum air temperature ≤ 5 °C for 13 days). Following the initial transient increases of bioactive trans-zeatin (about fivefold) during winter, the increased abscisic acid contents proved its important role during abiotic stress tolerance. Diurnal amounts of α-tocopherol and xanthophylls, particularly lutein, zeaxanthin and neoxanthin including the de-epoxidation state, reached maximum levels as early as 2 h after dawn, when solar intensity was 68% lower than the maximum solar radiation at noon. It is concluded that (1) given their proven antioxidant properties, both α-tocopherol and carotenoids seem to play a crucial role protecting the photosynthetic apparatus under severe stress conditions; (2) high seasonal amounts of abscisic acid indicate its important role in abiotic stress tolerance within plant hormones, although under specific environmental conditions, accumulation of bioactive cytokinins appears to be involved to enhance stress tolerance; (3) the concerted diurnal adjustment of α-tocopherol and xanthophylls as early as 3 h before maximum light intensity suggests that plants anticipated the predictable diurnal changes in the environment to protect the photosynthetic apparatus.
Collapse
Affiliation(s)
- Marina Pérez-Llorca
- Department of Evolutionary Biology, Ecology and Environmental Sciences, Faculty of Biology, University of Barcelona, Barcelona, Spain
- Biodiversity Research Institute, Faculty of Biology, University of Barcelona, Barcelona, Spain
| | - Andrea Casadesús
- Department of Evolutionary Biology, Ecology and Environmental Sciences, Faculty of Biology, University of Barcelona, Barcelona, Spain
| | - Sergi Munné-Bosch
- Department of Evolutionary Biology, Ecology and Environmental Sciences, Faculty of Biology, University of Barcelona, Barcelona, Spain
- Biodiversity Research Institute, Faculty of Biology, University of Barcelona, Barcelona, Spain
| | - Maren Müller
- Department of Evolutionary Biology, Ecology and Environmental Sciences, Faculty of Biology, University of Barcelona, Barcelona, Spain.
| |
Collapse
|
28
|
Ahmad S, Guo Y. Signal Transduction in Leaf Senescence: Progress and Perspective. PLANTS 2019; 8:plants8100405. [PMID: 31658600 PMCID: PMC6843215 DOI: 10.3390/plants8100405] [Citation(s) in RCA: 22] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 09/14/2019] [Revised: 10/08/2019] [Accepted: 10/08/2019] [Indexed: 02/07/2023]
Abstract
Leaf senescence is a degenerative process that is genetically controlled and involves nutrient remobilization prior to the death of leaf tissues. Age is a key developmental determinant of the process along with other senescence inducing factors. At the cellular level, different hormones, signaling molecules, and transcription factors contribute to the regulation of senescence. This review summarizes the recent progress in understanding the complexity of the senescence process with primary focuses on perception and transduction of senescence signals as well as downstream regulatory events. Future directions in this field and potential applications of related techniques in crop improvement will be discussed.
Collapse
Affiliation(s)
- Salman Ahmad
- Tobacco Research Institute, Chinese Academy of Agricultural Sciences, Qingdao 266101, China.
- Plant Breeding & Genetics Division, Nuclear Institute for Food & Agriculture, Tarnab, Peshawar P.O. Box 446, Pakistan.
| | - Yongfeng Guo
- Tobacco Research Institute, Chinese Academy of Agricultural Sciences, Qingdao 266101, China.
| |
Collapse
|
29
|
Farooq MA, Zhang K, Islam F, Wang J, Athar HUR, Nawaz A, Ullah Zafar Z, Xu J, Zhou W. Physiological and iTRAQ-Based Quantitative Proteomics Analysis of Methyl Jasmonate-Induced Tolerance in Brassica napus Under Arsenic Stress. Proteomics 2019. [PMID: 29528557 DOI: 10.1002/pmic.201700290] [Citation(s) in RCA: 21] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/06/2023]
Abstract
Brassica napus plants exposed to 200 μM arsenic (As) exhibited high-level of stress condition, which led to inhibited growth, enhanced lipid peroxidation, and disrupted cellular ultrastructures. Exogenous application of methyl jasmonate (MeJA) alleviated the As-induced oxidative stress and improved the plant growth and photosynthesis. In this study, changes in the B. napus leaf proteome are investigated in order to identify molecular mechanisms involved in MeJA-induced As tolerance. The study identifies 177 proteins that are differentially expressed in cultivar ZS 758; while 200 differentially expressed proteins are accumulated in Zheda 622, when exposed to As alone and MeJA+As treatments, respectively. The main objective was to identify the MeJA-regulated protein under As stress. Consistent with this, iTRAQ detected 61 proteins which are significantly accumulated in ZS 758 leaves treated with MeJA under As stress. While in Zheda 622, iTRAQ detected 49 MeJA-induced proteins under As stress. These significantly expressed proteins are further divided into five groups on the base of their function, that is, stress and defense, photosynthesis, carbohydrates and energy production, protein metabolism, and secondary metabolites. Taken together, this study sheds light on the molecular mechanisms involved in MeJA-induced As tolerance in B. napus leaves and suggests a more active involvement of MeJA in plant physiological processes.
Collapse
Affiliation(s)
- Muhammad Ahsan Farooq
- Institute of Crop Science and, Zhejiang Key Laboratory of Crop Germplasm, Zhejiang University, Hangzhou, P. R. China.,Institute of Pure and Applied Biology, Bahauddin Zakariya University, Multan, Pakistan
| | - Kangni Zhang
- Institute of Crop Science and, Zhejiang Key Laboratory of Crop Germplasm, Zhejiang University, Hangzhou, P. R. China
| | - Faisal Islam
- Institute of Crop Science and, Zhejiang Key Laboratory of Crop Germplasm, Zhejiang University, Hangzhou, P. R. China
| | - Jian Wang
- Institute of Crop Science and, Zhejiang Key Laboratory of Crop Germplasm, Zhejiang University, Hangzhou, P. R. China
| | - Habib U R Athar
- Institute of Pure and Applied Biology, Bahauddin Zakariya University, Multan, Pakistan
| | - Aamir Nawaz
- Faculty of Agricultural Sciences and Technology, Bahauddin Zakariya University, Multan, Pakistan
| | - Zafar Ullah Zafar
- Institute of Pure and Applied Biology, Bahauddin Zakariya University, Multan, Pakistan
| | - Jianxiang Xu
- Institute of Crop Science, Quzhou Academy of Agricultural Sciences, Quzhou, P. R. China
| | - Weijun Zhou
- Institute of Crop Science and, Zhejiang Key Laboratory of Crop Germplasm, Zhejiang University, Hangzhou, P. R. China
| |
Collapse
|
30
|
Akram W, Aslam H, Ahmad SR, Anjum T, Yasin NA, Khan WU, Ahmad A, Guo J, Wu T, Luo W, Li G. Bacillus megaterium strain A12 ameliorates salinity stress in tomato plants through multiple mechanisms. JOURNAL OF PLANT INTERACTIONS 2019; 14:506-518. [DOI: 10.1080/17429145.2019.1662497] [Citation(s) in RCA: 16] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/07/2019] [Accepted: 08/21/2019] [Indexed: 06/16/2023]
Affiliation(s)
- Waheed Akram
- Guangdong Key Laboratory for New Technology Research of Vegetables, Guangdong Academy of Agricultural Sciences, Guangzhou, People’s Republic of China
- Vegetable Research Institute, Guangdong Academy of Agricultural Sciences, Guangzhou, People’s Republic of China
| | - Hina Aslam
- College of Earth and Environmental Sciences, University of the Punjab, Lahore, Pakistan
| | - Sajid Rashid Ahmad
- College of Earth and Environmental Sciences, University of the Punjab, Lahore, Pakistan
| | - Tehmina Anjum
- Institute of Agricultural Sciences, University of the Punjab, Lahore, Pakistan
| | - Nasim Ahmad Yasin
- Institute of Agricultural Sciences, University of the Punjab, Lahore, Pakistan
| | - Waheed Ullah Khan
- College of Earth and Environmental Sciences, University of the Punjab, Lahore, Pakistan
| | - Aqeel Ahmad
- Guangdong Key Laboratory for New Technology Research of Vegetables, Guangdong Academy of Agricultural Sciences, Guangzhou, People’s Republic of China
- Vegetable Research Institute, Guangdong Academy of Agricultural Sciences, Guangzhou, People’s Republic of China
| | - Juxian Guo
- Guangdong Key Laboratory for New Technology Research of Vegetables, Guangdong Academy of Agricultural Sciences, Guangzhou, People’s Republic of China
- Vegetable Research Institute, Guangdong Academy of Agricultural Sciences, Guangzhou, People’s Republic of China
| | - Tingquan Wu
- Guangdong Key Laboratory for New Technology Research of Vegetables, Guangdong Academy of Agricultural Sciences, Guangzhou, People’s Republic of China
- Vegetable Research Institute, Guangdong Academy of Agricultural Sciences, Guangzhou, People’s Republic of China
| | - Wenlong Luo
- Guangdong Key Laboratory for New Technology Research of Vegetables, Guangdong Academy of Agricultural Sciences, Guangzhou, People’s Republic of China
- Vegetable Research Institute, Guangdong Academy of Agricultural Sciences, Guangzhou, People’s Republic of China
| | - Guihua Li
- Guangdong Key Laboratory for New Technology Research of Vegetables, Guangdong Academy of Agricultural Sciences, Guangzhou, People’s Republic of China
- Vegetable Research Institute, Guangdong Academy of Agricultural Sciences, Guangzhou, People’s Republic of China
| |
Collapse
|
31
|
Pavlů J, Novák J, Koukalová V, Luklová M, Brzobohatý B, Černý M. Cytokinin at the Crossroads of Abiotic Stress Signalling Pathways. Int J Mol Sci 2018; 19:ijms19082450. [PMID: 30126242 PMCID: PMC6121657 DOI: 10.3390/ijms19082450] [Citation(s) in RCA: 70] [Impact Index Per Article: 11.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/27/2018] [Revised: 08/14/2018] [Accepted: 08/17/2018] [Indexed: 01/13/2023] Open
Abstract
Cytokinin is a multifaceted plant hormone that plays major roles not only in diverse plant growth and development processes, but also stress responses. We summarize knowledge of the roles of its metabolism, transport, and signalling in responses to changes in levels of both macronutrients (nitrogen, phosphorus, potassium, sulphur) and micronutrients (boron, iron, silicon, selenium). We comment on cytokinin's effects on plants' xenobiotic resistance, and its interactions with light, temperature, drought, and salinity signals. Further, we have compiled a list of abiotic stress-related genes and demonstrate that their expression patterns overlap with those of cytokinin metabolism and signalling genes.
Collapse
Affiliation(s)
- Jaroslav Pavlů
- Department of Molecular Biology and Radiobiology, Faculty of AgriSciences, Mendel University in Brno, 613 00 Brno, Czech Republic.
- CEITEC-Central European Institute of Technology, Faculty of AgriSciences, Mendel University in Brno, 613 00 Brno, Czech Republic.
| | - Jan Novák
- Department of Molecular Biology and Radiobiology, Faculty of AgriSciences, Mendel University in Brno, 613 00 Brno, Czech Republic.
| | - Vladěna Koukalová
- Department of Molecular Biology and Radiobiology, Faculty of AgriSciences, Mendel University in Brno, 613 00 Brno, Czech Republic.
| | - Markéta Luklová
- Department of Molecular Biology and Radiobiology, Faculty of AgriSciences, Mendel University in Brno, 613 00 Brno, Czech Republic.
- CEITEC-Central European Institute of Technology, Faculty of AgriSciences, Mendel University in Brno, 613 00 Brno, Czech Republic.
| | - Břetislav Brzobohatý
- Department of Molecular Biology and Radiobiology, Faculty of AgriSciences, Mendel University in Brno, 613 00 Brno, Czech Republic.
- CEITEC-Central European Institute of Technology, Faculty of AgriSciences, Mendel University in Brno, 613 00 Brno, Czech Republic.
- Institute of Biophysics AS CR, 612 00 Brno, Czech Republic.
| | - Martin Černý
- Department of Molecular Biology and Radiobiology, Faculty of AgriSciences, Mendel University in Brno, 613 00 Brno, Czech Republic.
- Phytophthora Research Centre, Faculty of AgriSciences, Mendel University in Brno, 613 00 Brno, Czech Republic.
| |
Collapse
|
32
|
|
33
|
Li L, Gu W, Li J, Li C, Xie T, Qu D, Meng Y, Li C, Wei S. Exogenously applied spermidine alleviates photosynthetic inhibition under drought stress in maize (Zea mays L.) seedlings associated with changes in endogenous polyamines and phytohormones. PLANT PHYSIOLOGY AND BIOCHEMISTRY : PPB 2018; 129:35-55. [PMID: 29793181 DOI: 10.1016/j.plaphy.2018.05.017] [Citation(s) in RCA: 51] [Impact Index Per Article: 8.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/27/2018] [Revised: 05/09/2018] [Accepted: 05/10/2018] [Indexed: 05/21/2023]
Abstract
Drought stress (DS) is a major environmental factor limiting plant growth and crop productivity worldwide. It has been established that exogenous spermidine (Spd) stimulates plant tolerance to DS. The effects of exogenous Spd on plant growth, photosynthetic performance, and chloroplast ultrastructure as well as changes in endogenous polyamines (PAs) and phytohormones were investigate in DS-resistant (Xianyu 335) and DS-sensitive (Fenghe 1) maize seedlings under well-watered and DS treatments. Exogenous Spd alleviated the stress-induced reduction in growth, photosynthetic pigment content, photosynthesis rate (Pn) and photochemical quenching (qP) parameters, including the maximum photochemistry efficiency of photosystem II (PSII) (Fv/Fm), PSII operating efficiency (ФPSII), and qP coefficient. Exogenous Spd further enhanced stress-induced elevation in non-photochemical quenching (NPQ) and the de-epoxidation state of the xanthophyll cycle (DEPS). Microscopic analysis revealed that seedlings displayed a more ordered arrangement of chloroplast ultrastructure upon Spd application during DS. Exogenous Spd increased the endogenous PA concentrations in the stressed plants. Additionally, exogenous Spd increased indoleacetic acid (IAA), zeatin riboside (ZR) and gibberellin A3 (GA3) and decreased salicylic acid (SA) and jasmonate (JA) concentrations under DS. These results indicate that exogenous Spd can alleviate the growth inhibition and damage to the structure and function of the photosynthetic apparatus caused by DS and that this alleviation may be associated with changes in endogenous PAs and phytohormones. This study contributes to advances in the knowledge of Spd-induced drought tolerance.
Collapse
Affiliation(s)
- Lijie Li
- College of Agriculture, Northeast Agricultural University, Harbin 150030, Heilongjiang, China
| | - Wanrong Gu
- College of Agriculture, Northeast Agricultural University, Harbin 150030, Heilongjiang, China
| | - Jing Li
- College of Agriculture, Northeast Agricultural University, Harbin 150030, Heilongjiang, China
| | - Congfeng Li
- Institute of Crop Sciences, Chinese Academy of Agricultural Sciences, Beijing, 10081, China
| | - Tenglong Xie
- College of Agriculture, Northeast Agricultural University, Harbin 150030, Heilongjiang, China
| | - Danyang Qu
- College of Agriculture, Northeast Agricultural University, Harbin 150030, Heilongjiang, China
| | - Yao Meng
- Heilongjiang Academy of Land Reclamation Sciences, Harbin, 150038, Heilongjiang, China
| | - Caifeng Li
- College of Agriculture, Northeast Agricultural University, Harbin 150030, Heilongjiang, China
| | - Shi Wei
- College of Agriculture, Northeast Agricultural University, Harbin 150030, Heilongjiang, China.
| |
Collapse
|
34
|
Abhinandan K, Skori L, Stanic M, Hickerson NMN, Jamshed M, Samuel MA. Abiotic Stress Signaling in Wheat - An Inclusive Overview of Hormonal Interactions During Abiotic Stress Responses in Wheat. FRONTIERS IN PLANT SCIENCE 2018; 9:734. [PMID: 29942321 PMCID: PMC6004395 DOI: 10.3389/fpls.2018.00734] [Citation(s) in RCA: 78] [Impact Index Per Article: 13.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/02/2017] [Accepted: 05/15/2018] [Indexed: 05/19/2023]
Abstract
Rapid global warming directly impacts agricultural productivity and poses a major challenge to the present-day agriculture. Recent climate change models predict severe losses in crop production worldwide due to the changing environment, and in wheat, this can be as large as 42 Mt/°C rise in temperature. Although wheat occupies the largest total harvested area (38.8%) among the cereals including rice and maize, its total productivity remains the lowest. The major production losses in wheat are caused more by abiotic stresses such as drought, salinity, and high temperature than by biotic insults. Thus, understanding the effects of these stresses becomes indispensable for wheat improvement programs which have depended mainly on the genetic variations present in the wheat genome through conventional breeding. Notably, recent biotechnological breakthroughs in the understanding of gene functions and access to whole genome sequences have opened new avenues for crop improvement. Despite the availability of such resources in wheat, progress is still limited to the understanding of the stress signaling mechanisms using model plants such as Arabidopsis, rice and Brachypodium and not directly using wheat as the model organism. This review presents an inclusive overview of the phenotypic and physiological changes in wheat due to various abiotic stresses followed by the current state of knowledge on the identified mechanisms of perception and signal transduction in wheat. Specifically, this review provides an in-depth analysis of different hormonal interactions and signaling observed during abiotic stress signaling in wheat.
Collapse
Affiliation(s)
| | | | | | | | | | - Marcus A. Samuel
- Department of Biological Sciences, University of Calgary, Calgary, AB, Canada
| |
Collapse
|
35
|
Kim J, Park SJ, Lee IH, Chu H, Penfold CA, Kim JH, Buchanan-Wollaston V, Nam HG, Woo HR, Lim PO. Comparative transcriptome analysis in Arabidopsis ein2/ore3 and ahk3/ore12 mutants during dark-induced leaf senescence. JOURNAL OF EXPERIMENTAL BOTANY 2018; 69:3023-3036. [PMID: 29648620 PMCID: PMC5972659 DOI: 10.1093/jxb/ery137] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/23/2017] [Accepted: 03/29/2018] [Indexed: 05/24/2023]
Abstract
Leaf senescence involves degenerative but active biological processes that require balanced regulation of pro- and anti-senescing activities. Ethylene and cytokinin are major antagonistic regulatory hormones that control the timing and progression rate of leaf senescence. To identify the roles of these hormones in the regulation of leaf senescence in Arabidopsis, global gene expression profiles in detached leaves of the wild type, an ethylene-insensitive mutant (ein2/ore3), and a constitutive cytokinin response mutant (ahk3/ore12) were investigated during dark-induced leaf senescence. Comparative transcriptome analyses revealed that genes involved in oxidative or salt stress response were preferentially altered in the ein2/ore3 mutant, whereas genes involved in ribosome biogenesis were affected in the ahk3/ore12 mutant during dark-induced leaf senescence. Similar results were also obtained for developmental senescence. Through extensive molecular and physiological analyses in ein2/ore3 and ahk3/ore12 during dark-induced leaf senescence, together with responses when treated with cytokinin and ethylene inhibitor, we conclude that ethylene acts as a senescence-promoting factor via the transcriptional regulation of stress-related responses, whereas cytokinin acts as an anti-senescing agent by maintaining cellular activities and preserving the translational machinery. These findings provide new insights into how plants utilize two antagonistic hormones, ethylene and cytokinin, to regulate the molecular programming of leaf senescence.
Collapse
Affiliation(s)
- Jeongsik Kim
- Center for Plant Aging Research, Institute for Basic Science (IBS), Daegu, Republic of Korea
| | - Su Jin Park
- School of Interdisciplinary Bioscience and Bioengineering, POSTECH, Pohang, Gyeongbuk, Republic of Korea
| | - Il Hwan Lee
- Center for Plant Aging Research, Institute for Basic Science (IBS), Daegu, Republic of Korea
| | - Hyosub Chu
- Center for Plant Aging Research, Institute for Basic Science (IBS), Daegu, Republic of Korea
| | - Christopher A Penfold
- Wellcome Trust/Cancer Research UK Gurdon Institute, University of Cambridge, Cambridge, UK
| | - Jin Hee Kim
- Center for Plant Aging Research, Institute for Basic Science (IBS), Daegu, Republic of Korea
| | | | - Hong Gil Nam
- Center for Plant Aging Research, Institute for Basic Science (IBS), Daegu, Republic of Korea
- Department of New Biology, DGIST, Daegu, Republic of Korea
| | - Hye Ryun Woo
- Department of New Biology, DGIST, Daegu, Republic of Korea
| | - Pyung Ok Lim
- Department of New Biology, DGIST, Daegu, Republic of Korea
| |
Collapse
|
36
|
Prerostova S, Dobrev PI, Gaudinova A, Knirsch V, Körber N, Pieruschka R, Fiorani F, Brzobohatý B, černý M, Spichal L, Humplik J, Vanek T, Schurr U, Vankova R. Cytokinins: Their Impact on Molecular and Growth Responses to Drought Stress and Recovery in Arabidopsis. FRONTIERS IN PLANT SCIENCE 2018; 9:655. [PMID: 29872444 PMCID: PMC5972670 DOI: 10.3389/fpls.2018.00655] [Citation(s) in RCA: 26] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/15/2018] [Accepted: 04/27/2018] [Indexed: 05/02/2023]
Abstract
Our phenotyping and hormonal study has characterized the role of cytokinins (CK) in the drought and recovery responses of Arabidopsis thaliana. CK down-regulation was achieved by overexpression of the gene for CK deactivating enzyme cytokinin oxidase/dehydrogenase (CKX): constitutive (35S:CKX) or at the stress onset using a dexamethasone-inducible pOp/LhGR promoter (DEX:CKX). The 35S:CKX plants exhibited slow ontogenesis and higher expression levels of stress-associated genes, e.g., AtP5CS1, already at well-watered conditions. CK down-regulation resulted during drought in higher stress tolerance (indicated by relatively low up-regulation of the expression of drought stress marker gene AtRD29B) accompanied with lower leaf water loss. Nevertheless, these plants exhibited slow and delayed recovery after re-watering. CK levels were increased at the stress onset by stimulation of the expression of CK biosynthetic gene isopentenyl transferase (ipt) (DEX:IPT) or by application of exogenous CK meta-topolin. After water withdrawal, long-term CK elevation resulted in higher water loss in comparison with CKX transformants as well as with plants overexpressing ipt driven by senescence-inducible SAG12 promoter (SAG:IPT), which gradually enhanced CKs during the stress progression. In all cases, CK up-regulation resulted in fast and more vigorous recovery. All drought-stressed plants exhibited growth suppression associated with elevation of abscisic acid and decrease of auxins and active CKs (with the exception of SAG:IPT plants). Apart from the ipt overexpressers, also increase of jasmonic and salicylic acid was found.
Collapse
Affiliation(s)
- Sylva Prerostova
- Laboratory of Hormonal Regulations in Plants, Institute of Experimental Botany, Czech Academy of Sciences, Prague, Czechia
- Department of Experimental Plant Biology, Faculty of Science, Charles University, Prague, Czechia
| | - Petre I. Dobrev
- Laboratory of Hormonal Regulations in Plants, Institute of Experimental Botany, Czech Academy of Sciences, Prague, Czechia
| | - Alena Gaudinova
- Laboratory of Hormonal Regulations in Plants, Institute of Experimental Botany, Czech Academy of Sciences, Prague, Czechia
| | - Vojtech Knirsch
- Laboratory of Hormonal Regulations in Plants, Institute of Experimental Botany, Czech Academy of Sciences, Prague, Czechia
| | - Niklas Körber
- IBG-2: Plant Sciences, Institute for Bio-and Geosciences, Forschungszentrum Jülich, Jülich, Germany
| | - Roland Pieruschka
- IBG-2: Plant Sciences, Institute for Bio-and Geosciences, Forschungszentrum Jülich, Jülich, Germany
| | - Fabio Fiorani
- IBG-2: Plant Sciences, Institute for Bio-and Geosciences, Forschungszentrum Jülich, Jülich, Germany
| | - Břetislav Brzobohatý
- Laboratory of Plant Molecular Biology, Institute of Biophysics AS and CR — Central European Institute of Technology, Mendel University in Brno, Brno, Czechia
| | - Martin černý
- Laboratory of Plant Molecular Biology, Institute of Biophysics AS and CR — Central European Institute of Technology, Mendel University in Brno, Brno, Czechia
| | - Lukas Spichal
- Department of Chemical Biology and Genetics, Centre of the Region Hana for Biotechnological and Agricultural Research, Institute of Experimental Botany Czech Academy of Sciences and Faculty of Science of Palacky University, Olomouc, Czechia
| | - Jan Humplik
- Laboratory of Growth Regulators, Centre of the Region Hana for Biotechnological and Agricultural Research, Institute of Experimental Botany Czech Academy of Sciences, Faculty of Science of Palacky University, Olomouc, Czechia
| | - Tomas Vanek
- Laboratory of Plant Biotechnologies, Institute of Experimental Botany, Czech Academy of Sciences, Prague, Czechia
| | - Ulrich Schurr
- IBG-2: Plant Sciences, Institute for Bio-and Geosciences, Forschungszentrum Jülich, Jülich, Germany
| | - Radomira Vankova
- Laboratory of Hormonal Regulations in Plants, Institute of Experimental Botany, Czech Academy of Sciences, Prague, Czechia
| |
Collapse
|
37
|
Tardieu F, Simonneau T, Muller B. The Physiological Basis of Drought Tolerance in Crop Plants: A Scenario-Dependent Probabilistic Approach. ANNUAL REVIEW OF PLANT BIOLOGY 2018; 69:733-759. [PMID: 29553801 DOI: 10.1146/annurev-arplant-042817-040218] [Citation(s) in RCA: 158] [Impact Index Per Article: 26.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/18/2023]
Abstract
Drought tolerance involves mechanisms operating at different spatial and temporal scales, from rapid stomatal closure to maintenance of crop yield. We review how short-term mechanisms are controlled for stabilizing shoot water potential and how long-term processes have been constrained by evolution or breeding to fit into acclimation strategies for specific drought scenarios. These short- or long-term feedback processes participate in trade-offs between carbon accumulation and the risk of deleterious soil water depletion. Corresponding traits and alleles may therefore have positive or negative effects on crop yield depending on drought scenarios. We propose an approach that analyzes the genetic architecture of traits in phenotyping platforms and of yield in tens of field experiments. A combination of modeling and genomic prediction is then used to estimate the comparative interests of combinations of alleles depending on drought scenarios. Hence, drought tolerance is understood probabilistically by estimating the benefit and risk of each combination of alleles.
Collapse
Affiliation(s)
- François Tardieu
- INRA, Université Montpellier, Laboratoire d'Ecophysiologie des Plantes sous Stress Environnementaux, F-34060 Montpellier, France;
| | - Thierry Simonneau
- INRA, Université Montpellier, Laboratoire d'Ecophysiologie des Plantes sous Stress Environnementaux, F-34060 Montpellier, France;
| | - Bertrand Muller
- INRA, Université Montpellier, Laboratoire d'Ecophysiologie des Plantes sous Stress Environnementaux, F-34060 Montpellier, France;
| |
Collapse
|
38
|
Sade N, Del Mar Rubio-Wilhelmi M, Umnajkitikorn K, Blumwald E. Stress-induced senescence and plant tolerance to abiotic stress. JOURNAL OF EXPERIMENTAL BOTANY 2018; 69:845-853. [PMID: 28992323 DOI: 10.1093/jxb/erx235] [Citation(s) in RCA: 114] [Impact Index Per Article: 19.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/10/2017] [Accepted: 06/14/2017] [Indexed: 05/20/2023]
Abstract
Senescence is an age-dependent process, ultimately leading to plant death, that in annual crop plants overlaps with the reproductive stage of development. Research on the molecular and biochemical mechanisms of leaf senescence has revealed a multi-layered regulatory network operating to control age-dependent processes. Abiotic stress-induced senescence challenges source-sink relationships and results in significant reduction in crop yields. Although processes associated with plant senescence are well studied, the mechanisms regulating stress-induced senescence are not well known. Here, we discuss the effects of abiotic stress on crop productivity, mechanisms associated with stress-induced senescence, and the possible use of these mechanisms for the generation of plant stress tolerance. We emphasize the involvement of source strength and stability of the photosynthetic apparatus in this process, and suggest a possible role of a perennial plant life strategy for the amelioration of stress-induced senescence.
Collapse
Affiliation(s)
- Nir Sade
- Department of Plant Sciences, University of California, Davis, CA, USA
| | | | | | - Eduardo Blumwald
- Department of Plant Sciences, University of California, Davis, CA, USA
| |
Collapse
|
39
|
Singh S, Singh A, Srivastava PK, Prasad SM. Cadmium toxicity and its amelioration by kinetin in tomato seedlings vis-à-vis ascorbate-glutathione cycle. JOURNAL OF PHOTOCHEMISTRY AND PHOTOBIOLOGY B-BIOLOGY 2018; 178:76-84. [DOI: 10.1016/j.jphotobiol.2017.10.025] [Citation(s) in RCA: 36] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/25/2017] [Revised: 09/02/2017] [Accepted: 10/26/2017] [Indexed: 01/12/2023]
|
40
|
Xu Y, Burgess P, Huang B. Transcriptional regulation of hormone-synthesis and signaling pathways by overexpressing cytokinin-synthesis contributes to improved drought tolerance in creeping bentgrass. PHYSIOLOGIA PLANTARUM 2017; 161:235-256. [PMID: 28543596 DOI: 10.1111/ppl.12588] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/19/2017] [Revised: 05/09/2017] [Accepted: 05/15/2017] [Indexed: 05/20/2023]
Abstract
The objective of this study was to investigate transcriptomic changes and molecular factors regulated by cytokinins that may contribute to improved drought tolerance in creeping bentgrass (Agrostis stolonifera) overexpressing adenine isopentenyltransferase (ipt). Wild-type (WT) and ipt-transgenic plants were maintained well irrigated or exposed to 21 days of drought stress in growth chambers. Transcriptomic analysis conducted by RNA-seq revealed 661 and 648 upregulated and 764 and 862 downregulated drought-responsive genes (DRGs) in the WT and ipt-transgenic plants, respectively, under drought stress using adjusted P-value of 0.001 and log2 fold change. Gene ontology (GO) term classification showed that a greater number of DRGs were found in ipt-transgenic plants than in WT plants pertaining to biological functions including metabolic process, cellular process, cell structure and growth, macromolecular complex, and binding and catalytic activity, whereas fewer DRGs were found in ipt-transgenic plants than in WT plants pertaining to response to stimulus and antioxidant activity. Furthermore, plant hormone signal transduction pathway analysis revealed three downregulated transcripts [type B - Arabidopsis response regulators (B-ARR), ABA-responsive element binding factor (ABF) and pyrabactin resistance/like (PYR/PYL)] and two upregulated transcripts (BIN2 and JAZ) that were significantly differentiated between ipt-transgenic and WT plants under drought stress, which are particularly interesting for further investigation of molecular mechanisms of hormone-regulation of drought tolerance.
Collapse
Affiliation(s)
- Yi Xu
- Rutgers University, Department of Plant Biology, New Brunswick, NJ 08901, USA
| | - Patrick Burgess
- Rutgers University, Department of Plant Biology, New Brunswick, NJ 08901, USA
| | - Bingru Huang
- Rutgers University, Department of Plant Biology, New Brunswick, NJ 08901, USA
| |
Collapse
|
41
|
Hura T, Dziurka M, Hura K, Ostrowska A, Dziurka K, Gadzinowska J. Wheat and rye genome confer specific phytohormone profile features and interplay under water stress in two phenotypes of triticale. PLANT PHYSIOLOGY AND BIOCHEMISTRY : PPB 2017; 118:494-509. [PMID: 28756347 DOI: 10.1016/j.plaphy.2017.07.016] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/05/2017] [Revised: 07/17/2017] [Accepted: 07/18/2017] [Indexed: 05/04/2023]
Abstract
The aim of the experiment was to determine phytohormone profile of triticale and quality-based relationships between the analyzed groups of phytohormones. The study involved two triticale phenotypes, a long-stemmed one and a semi-dwarf one with Dw1 gene, differing in mechanisms of acclimation to drought and controlled by wheat or rye genome. Water deficit in the leaves triggered a specific phytohormone response in both winter triticale phenotypes attributable to the dominance of wheat (semi-dwarf cultivar) or rye (long-stemmed cultivar) genome. Rye genome in long-stemmed triticale was responsible for specific increase (tillering: gibberellic acid; heading: N6-isopentenyladenine, trans-zeatin-9-riboside, cis-zeatin-9-riboside; flowering: N6-isopentenyladenine, indolebutyric acid, salicylic acid) or decrease (heading: trans-zeatin) in the content of some phytohormones. Wheat genome in semi-dwarf triticale controlled a specific increase in trans-zeatin content at heading and anthesis in gibberellin A1 during anthesis. The greatest number of changes in the phytohormone levels was observed in the generative phase. In both triticale types, the pool of investigated phytohormones was dominated by abscisic acid and gibberellins. The semi-dwarf cultivar with Dw1 gene was less sensitive to gibberellins and its mechanisms of acclimation to water stress were mainly ABA-dependent. An increase in ABA and gibberellins during drought and predominance of these hormones in the total pool of analyzed phytohormones indicated their equal share in drought acclimation mechanisms in long-stemmed cultivar.
Collapse
Affiliation(s)
- Tomasz Hura
- Polish Academy of Sciences, The Franciszek Górski Institute of Plant Physiology, 30-239 Kraków, Niezapominajek 21, Poland.
| | - Michał Dziurka
- Polish Academy of Sciences, The Franciszek Górski Institute of Plant Physiology, 30-239 Kraków, Niezapominajek 21, Poland
| | - Katarzyna Hura
- Department of Plant Physiology, Faculty of Agriculture and Economics, Agricultural University, Podłużna 3, 30-239 Kraków, Poland
| | - Agnieszka Ostrowska
- Polish Academy of Sciences, The Franciszek Górski Institute of Plant Physiology, 30-239 Kraków, Niezapominajek 21, Poland
| | - Kinga Dziurka
- Polish Academy of Sciences, The Franciszek Górski Institute of Plant Physiology, 30-239 Kraków, Niezapominajek 21, Poland
| | - Joanna Gadzinowska
- Polish Academy of Sciences, The Franciszek Górski Institute of Plant Physiology, 30-239 Kraków, Niezapominajek 21, Poland
| |
Collapse
|
42
|
Sarwat M, Tuteja N. Hormonal signaling to control stomatal movement during drought stress. ACTA ACUST UNITED AC 2017. [DOI: 10.1016/j.plgene.2017.07.007] [Citation(s) in RCA: 30] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
|
43
|
Bielach A, Hrtyan M, Tognetti VB. Plants under Stress: Involvement of Auxin and Cytokinin. Int J Mol Sci 2017; 18:E1427. [PMID: 28677656 PMCID: PMC5535918 DOI: 10.3390/ijms18071427] [Citation(s) in RCA: 133] [Impact Index Per Article: 19.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/18/2017] [Revised: 06/26/2017] [Accepted: 06/27/2017] [Indexed: 02/06/2023] Open
Abstract
Plant growth and development are critically influenced by unpredictable abiotic factors. To survive fluctuating changes in their environments, plants have had to develop robust adaptive mechanisms. The dynamic and complementary actions of the auxin and cytokinin pathways regulate a plethora of developmental processes, and their ability to crosstalk makes them ideal candidates for mediating stress-adaptation responses. Other crucial signaling molecules responsible for the tremendous plasticity observed in plant morphology and in response to abiotic stress are reactive oxygen species (ROS). Proper temporal and spatial distribution of ROS and hormone gradients is crucial for plant survival in response to unfavorable environments. In this regard, the convergence of ROS with phytohormone pathways acts as an integrator of external and developmental signals into systemic responses organized to adapt plants to their environments. Auxin and cytokinin signaling pathways have been studied extensively. Nevertheless, we do not yet understand the impact on plant stress tolerance of the sophisticated crosstalk between the two hormones. Here, we review current knowledge on the function of auxin and cytokinin in redirecting growth induced by abiotic stress in order to deduce their potential points of crosstalk.
Collapse
Affiliation(s)
- Agnieszka Bielach
- Mendel Centre for Plant Genomics and Proteomics, Central European Institute of Technology (CEITEC), Masaryk University, Kamenice 5, Czech 62500, Brno, Czech Republic.
| | - Monika Hrtyan
- Mendel Centre for Plant Genomics and Proteomics, Central European Institute of Technology (CEITEC), Masaryk University, Kamenice 5, Czech 62500, Brno, Czech Republic.
| | - Vanesa B Tognetti
- Mendel Centre for Plant Genomics and Proteomics, Central European Institute of Technology (CEITEC), Masaryk University, Kamenice 5, Czech 62500, Brno, Czech Republic.
| |
Collapse
|
44
|
Ajigboye OO, Lu C, Murchie EH, Schlatter C, Swart G, Ray RV. Altered gene expression by sedaxane increases PSII efficiency, photosynthesis and growth and improves tolerance to drought in wheat seedlings. PESTICIDE BIOCHEMISTRY AND PHYSIOLOGY 2017; 137:49-61. [PMID: 28364804 DOI: 10.1016/j.pestbp.2016.09.008] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/11/2016] [Revised: 09/23/2016] [Accepted: 09/28/2016] [Indexed: 06/07/2023]
Abstract
Succinate dehydrogenase inhibitor (SDHI) fungicides have been shown to increase PSII efficiency and photosynthesis under drought stress in the absence of disease to enhance the biomass and yield of winter wheat. However, the molecular mechanism of improved photosynthetic efficiency observed in SDHI-treated wheat has not been previously elucidated. Here we used a combination of chlorophyll fluorescence, gas exchange and gene expression analysis, to aid our understanding of the basis of the physiological responses of wheat seedlings under drought conditions to sedaxane, a novel SDHI seed treatment. We show that sedaxane increased the efficiency of PSII photochemistry, reduced non-photochemical quenching and improved the photosynthesis and biomass in wheat correlating with systemic changes in the expression of genes involved in defense, chlorophyll synthesis and cell wall modification. We applied a coexpression network-based approach using differentially expressed genes of leaves, roots and pregerminated seeds from our wheat array datasets to identify the most important hub genes, with top ranked correlation (higher gene association value and z-score) involved in cell wall expansion and strengthening, wax and pigment biosynthesis and defense. The results indicate that sedaxane confers tolerant responses of wheat plants grown under drought conditions by redirecting metabolites from defense/stress responses towards growth and adaptive development.
Collapse
Affiliation(s)
- Olubukola O Ajigboye
- School of Biosciences, University of Nottingham, Sutton Bonington, Loughborough, Leicestershire LE12 5RD, United Kingdom
| | - Chungui Lu
- School of Biosciences, University of Nottingham, Sutton Bonington, Loughborough, Leicestershire LE12 5RD, United Kingdom
| | - Erik H Murchie
- School of Biosciences, University of Nottingham, Sutton Bonington, Loughborough, Leicestershire LE12 5RD, United Kingdom
| | | | - Gina Swart
- Syngenta Crop Protection, Schwarzwaldallee 215, 4058 Basel, Switzerland
| | - Rumiana V Ray
- School of Biosciences, University of Nottingham, Sutton Bonington, Loughborough, Leicestershire LE12 5RD, United Kingdom.
| |
Collapse
|
45
|
Li X, Kanakala S, He Y, Zhong X, Yu S, Li R, Sun L, Ma J. Physiological Characterization and Comparative Transcriptome Analysis of White and Green Leaves of Ananas comosus var. bracteatus. PLoS One 2017; 12:e0169838. [PMID: 28095462 PMCID: PMC5240938 DOI: 10.1371/journal.pone.0169838] [Citation(s) in RCA: 21] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/24/2016] [Accepted: 12/22/2016] [Indexed: 11/18/2022] Open
Abstract
Leaf coloration is one of the most important and attractive characteristics of Ananas comosus var. bracteatus. The chimeric character is not stable during the in vitro tissue culturing. Many regenerated plants lost economic values for the loss of the chimeric character of leaves. In order to reveal the molecular mechanisms involved in the albino phenotype of the leaf cells, the physiological and transcriptional differences between complete white (CWh) and green (CGr) leaf cells of A. comosus var. bracteatus were analyzed. A total of 1,431 differentially expressed unigenes (DEGs) in CGr and CWh leaves were identified using RNA-seq. A comparison to the COG, GO and KEGG annotations revealed DEGs involved in chlorophyll biosynthesis, chloroplast development and photosynthesis. Furthermore, the measurement of main precursors of chlorophyll in the CWh leaves confirmed that the rate-limiting step in chlorophyll biosynthesis, and thus the cause of the albino phenotype of the white cells, was the conversion of pyrrole porphobilinogen (PBG) to uroporphyrinogen III (Uro III). The enzyme activity of porphobilinogen deaminase (PBGD) and uroporporphyrinogn III synthase (UROS), which catalyze the transition of PBG to Uro III, was significantly decreased in the CWh leaves. Our data showed the transcriptional differences between the CWh and CGr plants and characterized key steps in chlorophyll biosynthesis of the CWh leaves. These results contribute to our understanding of the mechanisms and regulation of pigment biosynthesis in the CWh leaf cells of A. comosus var. bracteatus.
Collapse
Affiliation(s)
- Xia Li
- College of Landscape Architecture of Sichuan Agricultural University, Chengdu, Sichuan, China
| | - Surapathrudu Kanakala
- Institute of Plant Protection, Agricultural Research Organization, The Volcani Center, Beit Dagan, Israel
| | - Yehua He
- Horticultural Biotechnology College of South China Agricultural University, Guangzhou, Guangdong, China
| | - Xiaolan Zhong
- College of Landscape Architecture of Sichuan Agricultural University, Chengdu, Sichuan, China
| | - Sanmiao Yu
- College of Landscape Architecture of Sichuan Agricultural University, Chengdu, Sichuan, China
| | - Ruixue Li
- College of Landscape Architecture of Sichuan Agricultural University, Chengdu, Sichuan, China
| | - Lingxia Sun
- College of Landscape Architecture of Sichuan Agricultural University, Chengdu, Sichuan, China
| | - Jun Ma
- College of Landscape Architecture of Sichuan Agricultural University, Chengdu, Sichuan, China
| |
Collapse
|
46
|
Farber M, Attia Z, Weiss D. Cytokinin activity increases stomatal density and transpiration rate in tomato. JOURNAL OF EXPERIMENTAL BOTANY 2016; 67:6351-6362. [PMID: 27811005 PMCID: PMC5181579 DOI: 10.1093/jxb/erw398] [Citation(s) in RCA: 32] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/21/2023]
Abstract
Previous studies on cytokinin (CK) and drought have suggested that the hormone has positive and negative effects on plant adaptation to restrictive conditions. This study examined the effect of CK on transpiration, stomatal activity, and response to drought in tomato (Solanum lycopersicum) plants. Transgenic tomato plants overexpressing the Arabidopsis thaliana CK-degrading enzyme CK oxidase/dehydrogenase 3 (CKX3) maintained higher leaf water status under drought conditions due to reduced whole-plant transpiration. The reduced transpiration could be attributed to smaller leaf area and reduced stomatal density. CKX3-overexpressing plants contained fewer and larger pavement cells and fewer stomata per leaf area than wild-type plants. In addition, wild-type leaves treated with CK exhibited enhanced transpiration and had more pavement cells and increased numbers of stomata per leaf area than untreated leaves. Manipulation of CK levels did not affect stomatal movement or abscisic acid-induced stomatal closure. Moreover, we found no correlation between stomatal aperture and the activity of the CK-induced promoter Two-Component Signaling Sensor (TCS) in guard cells. Previous studies have shown that drought reduces CK levels, and we propose this to be a mechanism of adaptation to water deficiency: the reduced CK levels suppress growth and reduce stomatal density, both of which reduce transpiration, thereby increasing tolerance to prolonged drought conditions.
Collapse
Affiliation(s)
- Mika Farber
- Institute of Plant Sciences and Genetics in Agriculture, The Robert H. Smith Faculty of Agriculture, Food and Environment, The Hebrew University of Jerusalem, P.O. Box 12, Rehovot 76100, Israel
| | - Ziv Attia
- Institute of Plant Sciences and Genetics in Agriculture, The Robert H. Smith Faculty of Agriculture, Food and Environment, The Hebrew University of Jerusalem, P.O. Box 12, Rehovot 76100, Israel
| | - David Weiss
- Institute of Plant Sciences and Genetics in Agriculture, The Robert H. Smith Faculty of Agriculture, Food and Environment, The Hebrew University of Jerusalem, P.O. Box 12, Rehovot 76100, Israel
| |
Collapse
|
47
|
Merewitz E, Xu Y, Huang B. Differentially Expressed Genes Associated with Improved Drought Tolerance in Creeping Bentgrass Overexpressing a Gene for Cytokinin Biosynthesis. PLoS One 2016; 11:e0166676. [PMID: 27855226 PMCID: PMC5113972 DOI: 10.1371/journal.pone.0166676] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/28/2016] [Accepted: 11/02/2016] [Indexed: 12/03/2022] Open
Abstract
Transformation with an isopentenyl transferase (ipt) gene controlling cytokinin (CK) synthesis has been shown to enhance plant drought tolerance. The objective of this study was to identify differentially-expressed genes (DEGs) in creeping bentgrass (Agrostis stolonifera) overexpressing ipt compared to non-transgenic plants. The ipt transgene was controlled by a senescence-activated promoter (SAG12). Both a null transformed line (NT) and SAG12-ipt plants were exposed to drought stress in an environmentally-controlled growth chamber until the soil water content declined to approximately 5% and leaf relative water content declined to 47%, which were both significantly below the well-watered controls. RNA was extracted from leaf samples of both well-watered and drought-stressed plants. Eight sets of subtractive hybridizations were performed for detection of up-regulated and down-regulated genes due to the presence of the transgene and due to drought stress in both NT and transgenic plants. Sequencing analysis revealed the identity of 252 DEGs due to either the transgene and drought stress. Sequencing analysis of 170 DEGs identified genes encoding for proteins that were related to energy production, metabolism, stress defense, signaling, protein synthesis and transport, and membrane transport could play major roles in the improved drought tolerance by overexpressing ipt in creeping bentgrass.
Collapse
Affiliation(s)
- Emily Merewitz
- Department of Plant, Soil, and Microbial Sciences, Michigan State University, East Lansing, 48824, United States of America
| | - Yi Xu
- Department of Plant Biology and Pathology, Rutgers University, New Brunswick, NJ, 08901, United States of America
| | - Bingru Huang
- Department of Plant Biology and Pathology, Rutgers University, New Brunswick, NJ, 08901, United States of America
- * E-mail:
| |
Collapse
|
48
|
Lehotai N, Feigl G, Koós Á, Molnár Á, Ördög A, Pető A, Erdei L, Kolbert Z. Nitric oxide-cytokinin interplay influences selenite sensitivity in Arabidopsis. PLANT CELL REPORTS 2016; 35:2181-2195. [PMID: 27449496 DOI: 10.1007/s00299-016-2028-5] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/09/2016] [Accepted: 07/13/2016] [Indexed: 06/06/2023]
Abstract
Selenite oppositely modifies cytokinin and nitric oxide metabolism in Arabidopsis organs. A mutually negative interplay between the molecules exists in selenite-exposed roots; and their overproduction causes selenite insensitivity. Selenium-induced phytotoxicity is accompanied by developmental alterations such as primary root (PR) shortening. Growth changes are provoked by the modulation of hormone status and signalling. Cytokinin (CK) cooperates with the nitric oxide (NO) in many aspects of plant development; however, their interaction under abiotic stress has not been examined. Selenite inhibited the growth of Arabidopsis seedlings and reduced root meristem size through cell division arrest. The CK-dependent pARR5::GUS activity revealed the intensification of CK signalling in the PR tip, which may be partly responsible for the root meristem shortening. The selenite-induced alterations in the in situ expressions of cytokinin oxidases (AtCKX4::GUS, AtCKX5::GUS) are associated with selenite-triggered changes of CK signalling. In wild-type (WT) and NO-deficient nia1nia2 root, selenite led to the diminution of NO content, but CK overproducer ipt-161 and -deficient 35S:CKX2 roots did not show NO decrease. Exogenous NO (S-nitroso-N-acetyl-DL-penicillamine, SNAP) reduced the pARR5::GFP and pTCS::GFP expressions. Roots of the 35S:CKX and cyr1 plants suffered more severe selenite-triggered viability loss than the WT, while in ipt-161 and gsnor1-3 no obvious viability decrease was observed. Exogenous NO ameliorated viability loss, but benzyladenine intensified it. Based on the results, selenite impacts development by oppositely modifying CK signalling and NO level. In the root system, CK signalling intensifies which possibly contributes to the nitrate reductase-independent NO diminution. A mutually negative CK-NO interplay exists in selenite-exposed roots; however, overproduction of both molecules worsens selenite sensing. Hereby, we suggest novel regulatory interplay and role for NO and CK in abiotic stress signalling.
Collapse
Affiliation(s)
- Nóra Lehotai
- Department of Plant Physiology, Umeå Plant Science Centre, Umeå University, Umeå, Sweden
| | - Gábor Feigl
- Department of Plant Biology, Faculty of Science and Informatics, University of Szeged, Közép fasor 52, 6726, Szeged, Hungary
| | - Ágnes Koós
- Department of Plant Biology, Faculty of Science and Informatics, University of Szeged, Közép fasor 52, 6726, Szeged, Hungary
| | - Árpád Molnár
- Department of Plant Biology, Faculty of Science and Informatics, University of Szeged, Közép fasor 52, 6726, Szeged, Hungary
| | - Attila Ördög
- Department of Plant Biology, Faculty of Science and Informatics, University of Szeged, Közép fasor 52, 6726, Szeged, Hungary
| | - Andrea Pető
- Department of Plant Biology, Faculty of Science and Informatics, University of Szeged, Közép fasor 52, 6726, Szeged, Hungary
| | - László Erdei
- Department of Plant Biology, Faculty of Science and Informatics, University of Szeged, Közép fasor 52, 6726, Szeged, Hungary
| | - Zsuzsanna Kolbert
- Department of Plant Biology, Faculty of Science and Informatics, University of Szeged, Közép fasor 52, 6726, Szeged, Hungary.
| |
Collapse
|
49
|
Prudent M, Salon C, Smith DL, Emery RJN. Nod factor supply under water stress conditions modulates cytokinin biosynthesis and enhances nodule formation and N nutrition in soybean. PLANT SIGNALING & BEHAVIOR 2016; 11:e1212799. [PMID: 27454159 PMCID: PMC5058462 DOI: 10.1080/15592324.2016.1212799] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/09/2016] [Revised: 07/04/2016] [Accepted: 07/08/2016] [Indexed: 05/29/2023]
Abstract
Nod factors (NF) are molecules produced by rhizobia which are involved in the N2-fixing symbiosis with legume plants, enabling the formation of specific organs called nodules. Under drought conditions, nitrogen acquisition by N2-fixation is depressed, resulting in low legume productivity. In this study, we evaluated the effects of NF supply on nitrogen acquisition and on cytokinin biosynthesis of soybean plants grown under drought. NF supply to water stressed soybeans increased the CK content of all organs. The profile of CK metabolites also shifted from t-Z to cis-Z and an accumulation of nucleotide and glucoside conjugates. The changes in CK coincided with enhanced nodule formation with sustained nodule specific activity, which ultimately increased the total nitrogen fixed by the plant.
Collapse
Affiliation(s)
| | | | - Donald L. Smith
- Plant Science Department, McGill University, McDonald Campus, St Anne de Bellevue, Quebec, Canada
| | - R. J. Neil Emery
- Department of Biology, Trent University, Peterborough, Ontario, Canada
| |
Collapse
|
50
|
Verslues PE. ABA and cytokinins: challenge and opportunity for plant stress research. PLANT MOLECULAR BIOLOGY 2016; 91:629-640. [PMID: 26910054 DOI: 10.1007/s11103-016-0458-7] [Citation(s) in RCA: 38] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/29/2015] [Accepted: 02/19/2016] [Indexed: 06/05/2023]
Abstract
Accumulation of the stress hormone abscisic acid (ABA) induces many cellular mechanisms associated with drought resistance. Recent years have seen a rapid advance in our knowledge of how increased ABA levels are perceived by ABA receptors, particularly the PYL/RCAR receptors, but there has been relatively less new information about how ABA accumulation is controlled and matched to stress severity. ABA synthesis and catabolism, conjugation and deconjugation to glucose, and ABA transport all are involved in controlling ABA levels. This highly buffered system of ABA metabolism represents both a challenge and opportunity in developing a mechanistic understanding of how plants detect and respond to drought. Recent data have also shown that direct manipulation of cytokinin levels in transgenic plants has dramatic effect on drought phenotypes and prompted new interest in the role of cytokinins and cytokinin signaling in drought. Both ABA and cytokinins will continue to be major foci of drought research but likely with different trajectories both in terms of basic research and in translational research aimed at increasing plant performance during drought.
Collapse
Affiliation(s)
- Paul E Verslues
- Institute of Plant and Microbial Biology, Academia Sinica, No. 128 Sec. 2 Academia Rd, Nankang Dist., Taipei, 11529, Taiwan.
| |
Collapse
|