Imperative role of sugar signaling and transport during drought stress responses in plants

2021 ◽  
Vol 171 (4) ◽  
pp. 833-848
Author(s):  
Harmeet Kaur ◽  
Mrinalini Manna ◽  
Tanika Thakur ◽  
Vibhav Gautam ◽  
Prafull Salvi
Keyword(s):  
Drought Stress ◽  
Stress Responses ◽  
Sugar Signaling

scholarly journals Spermine: Its Emerging Role in Regulating Drought Stress Responses in Plants

Cells ◽  
2021 ◽  
Vol 10 (2) ◽  
pp. 261
Author(s):  
Md. Mahadi Hasan ◽  
Milan Skalicky ◽  
Mohammad Shah Jahan ◽  
Md. Nazmul Hossain ◽  
Zunaira Anwar ◽  
...  
Keyword(s):  
Drought Stress ◽  
Drought Tolerance ◽  
Stress Responses ◽  
Abiotic Stresses ◽  
Defense Mechanisms ◽  
Antioxidant Defense ◽  
Severe Drought ◽  
New Information ◽  
Effects Of Drought

In recent years, research on spermine (Spm) has turned up a lot of new information about this essential polyamine, especially as it is able to counteract damage from abiotic stresses. Spm has been shown to protect plants from a variety of environmental insults, but whether it can prevent the adverse effects of drought has not yet been reported. Drought stress increases endogenous Spm in plants and exogenous application of Spm improves the plants’ ability to tolerate drought stress. Spm’s role in enhancing antioxidant defense mechanisms, glyoxalase systems, methylglyoxal (MG) detoxification, and creating tolerance for drought-induced oxidative stress is well documented in plants. However, the influences of enzyme activity and osmoregulation on Spm biosynthesis and metabolism are variable. Spm interacts with other molecules like nitric oxide (NO) and phytohormones such as abscisic acid, salicylic acid, brassinosteroids, and ethylene, to coordinate the reactions necessary for developing drought tolerance. This review focuses on the role of Spm in plants under severe drought stress. We have proposed models to explain how Spm interacts with existing defense mechanisms in plants to improve drought tolerance.

scholarly journals Calcium Application Enhances Drought Stress Tolerance in Sugar Beet and Promotes Plant Biomass and Beetroot Sucrose Concentration

2019 ◽  
Vol 20 (15) ◽  
pp. 3777 ◽  
Author(s):  
Seyed Abdollah Hosseini ◽  
Elise Réthoré ◽  
Sylvain Pluchon ◽  
Nusrat Ali ◽  
Bastien Billiot ◽  
...  
Keyword(s):  
Drought Stress ◽  
Plant Growth ◽  
Sugar Beet ◽  
Stress Tolerance ◽  
Mineral Nutrition ◽  
Stress Responses ◽  
Foliar Application ◽  
Sucrose Concentration ◽  
Drought Stress Tolerance

Numerous studies have demonstrated the potential of sugar beet to lose the final sugar yield under water limiting regime. Ample evidences have revealed the important role of mineral nutrition in increasing plant tolerance to abiotic stresses. Despite the vital role of calcium (Ca2+) in plant growth and development, as well as in stress responses as an intracellular messenger, its role in alleviating drought stress in sugar beet has been rarely addressed. Here, an attempt was undertaken to investigate whether, and to what extent, foliar application of Ca2+ confers drought stress tolerance in sugar beet plants exposed to drought stress. To achieve this goal, sugar beet plants, which were grown in a high throughput phenotyping platform, were sprayed with Ca2+ and submitted to drought stress. The results showed that foliar application of Ca2+ increased the level of magnesium and silicon in the leaves, promoted plant growth, height, and leaf coverage area as well as chlorophyll level. Ca2+, in turn, increased the carbohydrate levels in leaves under drought condition and regulated transcriptionally the genes involved in sucrose transport (BvSUC3 and BvTST3). Subsequently, Ca2+ enhanced the root biomass and simultaneously led to induction of root (BvSUC3 and BvTST1) sucrose transporters which eventually supported the loading of more sucrose into beetroot under drought stress. Metabolite analysis revealed that the beneficial effect of Ca2+ in tolerance to drought induced-oxidative stress is most likely mediated by higher glutathione pools, increased levels of free polyamine putrescine (Put), and lower levels of amino acid gamma-aminobutyric acid (GABA). Taken together, this work demonstrates that foliar application of Ca2+ is a promising fertilization strategy to improve mineral nutrition efficiency, sugar metabolism, redox state, and thus, drought stress tolerance.

scholarly journals Role of an Arabidopsis AP2/EREBP-Type Transcriptional Repressor in Abscisic Acid and Drought Stress Responses

2005 ◽  
Vol 17 (8) ◽  
pp. 2384-2396 ◽  
Author(s):  
Chun-Peng Song ◽  
Manu Agarwal ◽  
Masaru Ohta ◽  
Yan Guo ◽  
Ursula Halfter ◽  
...  
Keyword(s):  
Abscisic Acid ◽  
Drought Stress ◽  
Stress Responses ◽  
Transcriptional Repressor

Role of cin-miR2118 in drought stress responses in Caragana intermedia and Tobacco

Gene ◽  
2015 ◽  
Vol 574 (1) ◽  
pp. 34-40 ◽  
Author(s):  
Bi-fei Wu ◽  
Wan-feng Li ◽  
Hai-yan Xu ◽  
Li-wang Qi ◽  
Su-ying Han
Keyword(s):  
Drought Stress ◽  
Stress Responses ◽  
Caragana Intermedia

scholarly journals Identification of Drought-Responsive microRNAs from Roots and Leaves of Alfalfa by High-Throughput Sequencing

2017 ◽  
Author(s):  
Yue Li ◽  
Liqiang Wan ◽  
Shuyi Bi ◽  
Xiufu Wan ◽  
Zhenyi Li ◽  
...  
Keyword(s):  
Drought Stress ◽  
High Throughput ◽  
Stress Responses ◽  
High Throughput Sequencing ◽  
Target Genes ◽  
Plant Stress ◽  
Online Tool ◽  
Bioenergy Plant ◽  
Plant Stress Responses

Alfalfa, an important legume forage, is an ideal crop for sustainable agriculture and a potential bioenergy plant. Drought, one of the most common environmental stresses, substantially affects plants’ growth, development and productivity. MicroRNAs (miRNAs) are newly discovered gene expression regulators that have been linked to several plant stress responses. To elucidate the role of miRNAs in drought stress regulation of alfalfa, a high-throughput sequencing approach was used to analyze 12 small RNA libraries comprising of 4 samples, each with 3 biological replicates. We identified 348 known miRNAs, belonging to 80 miRNA families, from the 12 libraries and 281 novel miRNAs using Mireap software. 18 known miRNAs in roots and 12 known miRNAs in leaves were screened out as drought-responsive miRNAs. Except for miR319d and miR157a which were upregulated under drought stress, the expression pattern of drought-responsive miRNAs were different between roots and leaves in alfalfa. This is the first study discovering miR157a, miR1507, miR3512, miR3630, miR5213, miR5294, miR5368 and miR6173 are drought-responsive miRNAs. Target transcripts of drought-responsive miRNAs were computationally predicted. All 447 target genes for the known miRNAs were predicted using an online tool. This study provides a significant insight on understanding drought-responsive mechanisms of alfalfa.

scholarly journals Studies on the Accumulation of Drought-Induced Boiling Soluble Proteins (Hydrophilins) at Vegetative and Reproductive Phases of Drought Tolerant and Susceptible Cultivars of Triticum aestivum

2014 ◽  
Vol 6 (2) ◽  
pp. 225-236
Author(s):  
Gurmeen RAKHRA ◽  
Arun Dev SHARMA ◽  
Jatinder SINGH
Keyword(s):  
Water Stress ◽  
Drought Stress ◽  
Stress Responses ◽  
Blot Analysis ◽  
Soluble Proteins ◽  
Dependent Manner ◽  
Water Stress Tolerance ◽  
Drought Tolerant ◽  
Boiling Soluble Proteins

Drought is one of the major environmental constraints affecting the crops worldwide. Expression of boiling soluble proteins (BSPs) is of paramount importance, because they play important roles in the water stress responses and also in plant metabolism. In this study, the effect of drought on BSPs at vegetative (shoots) and reproductive (seeds) phases of drought tolerant (cv. ‘PBW 527’) and drought susceptible (cv. ‘PBW 343’) cultivars of Triticumaestivum were carried at three different developmental stages. The boiling soluble protein profiles of shoots and seeds were outlined via SDS-PAGE followed by immune-blot analysis using anti-HSP, anti-APase, anti-LEA, anti-SOD, anti-AQUA and anti-CAT antibodies. Western blot analysis revealed that expression of BSPs was modulated differentially in a stress, tissue, developmental stage and cultivar dependent manner. For instance, enhanced expression of seeds BSPs (APase, LEA, CAT, AQUA) was observed in the tolerant cv. ‘PBW 527’ after drought stress. However, no such enhancement was observed in the susceptible cultivar. Similarly, in shoots of cv. ‘PBW 527’, a substantial increase of BSP (SOD) expression was established after drought stress treatment, indicating their role in drought stress adaptation. Further, to gain an insight into the role of BSPs, a time course pre- and post-stress kinetic studies were also conducted in the seeds of tolerant and susceptible wheat cultivars. Based upon the observations, the possible role of boiling soluble proteins (hydrophilins) in water stress tolerance is discussed.

scholarly journals Possible Role of Nutritional Priming for Early Salt and Drought Stress Responses in Medicago truncatula

2012 ◽  
Vol 3 ◽  
Author(s):  
Christiana Staudinger ◽  
Vlora Mehmeti ◽  
Reinhard Turetschek ◽  
David Lyon ◽  
Volker Egelhofer ◽  
...  
Keyword(s):  
Drought Stress ◽  
Medicago Truncatula ◽  
Stress Responses ◽  
Salt And Drought Stress
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