scholarly journals Recent Advances in PGPR and Molecular Mechanisms Involved in Drought Stress Tolerance

2021 ◽  
Author(s):  
Diksha Sati ◽  
Veni Pande ◽  
Satish Chandra Pandey ◽  
Mukesh Samant
Keyword(s):  
Drought Stress ◽  
Stress Tolerance ◽  
Molecular Mechanisms ◽  
Anthropogenic Activities ◽  
Plant Growth Promoting Rhizobacteria ◽  
Global Food Security ◽  
Drought Stress Tolerance ◽  
Mechanistic Approach ◽  
Plant Growth Promoting

Increased severity of droughts, due to anthropogenic activities and global warming has imposed a severe threat on agricultural productivity ever before. This has further advanced the need for some eco-friendly approaches to ensure global food security. In this regard, application of plant growth-promoting rhizobacteria (PGPR) can be beneficial. PGPR through various mechanisms viz. osmotic adjustments, increased antioxidant, phytohormone production, regulating stomatal conductivity, increased nutrient uptake, releasing Volatile organic compounds (VOCs), and Exo-polysaccharide (EPS) production, etc not only ensures the plant’s survival during drought but also augment its growth. This review, extensively discusses the various mechanisms of PGPR in drought stress tolerance. We have also summarized the recent molecular and omics-based approaches for elucidating the role of drought responsive genes. The manuscript presents an in-depth mechanistic approach to combat the drought stress and also deals with designing PGPR based bioinoculants. Lastly, we present a possible sequence of steps for increasing the success rate of bioinoculants.

scholarly journals Enhancement of drought stress tolerance in crops by plant growth promoting rhizobacteria

2016 ◽  
Vol 184 ◽  
pp. 13-24 ◽  
Author(s):  
Sai Shiva Krishna Prasad Vurukonda ◽  
Sandhya Vardharajula ◽  
Manjari Shrivastava ◽  
Ali SkZ
Keyword(s):  
Drought Stress ◽  
Plant Growth ◽  
Stress Tolerance ◽  
Plant Growth Promoting Rhizobacteria ◽  
Drought Stress Tolerance ◽  
Plant Growth Promoting ◽  
Growth Promoting

Role of phytosterols in drought stress tolerance in rice

2015 ◽  
Vol 96 ◽  
pp. 83-89 ◽  
Author(s):  
M.S. Sujith Kumar ◽  
Kishwar Ali ◽  
Anil Dahuja ◽  
Aruna Tyagi
Keyword(s):  
Drought Stress ◽  
Stress Tolerance ◽  
Drought Stress 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 Poaceae Orthologs of Rice OsSGL, DUF1645 Domain-Containing Genes, Positively Regulate Drought Tolerance, Grain Length and Weight in Rice

2020 ◽  
Author(s):  
Kai Liu ◽  
Mingjuan Li ◽  
Bin Zhang ◽  
Yanchun Cui ◽  
Xuming Yin ◽  
...  
Keyword(s):  
Drought Stress ◽  
Stress Tolerance ◽  
Molecular Mechanisms ◽  
Normal Growth ◽  
Growth Conditions ◽  
Growth Stages ◽  
Grain Length ◽  
Drought Stress Tolerance ◽  
High Level ◽  
Seed Setting Percentage

Abstract BackgroundGrain yield is a polygenic trait influenced by environmental and genetic interactions at all growth stages of the cereal plant. However, the molecular mechanisms responsible for coordinating the trade-off or cross-talk between these traits remain elusive.ResultsWe characterized the hitherto unknown function of four STRESS_tolerance and GRAIN_LENGTH (OsSGL) Poaceae ortholog genes, all encoding DUF1645 domain-containing proteins, in simultaneous regulation of grain length, grain weight, and drought stress-tolerance in rice. In normal growth conditions, the four ortholog genes were mainly expressed in the developing roots and panicles of the corresponding species. Over-expressing or heterologous high-level expressing Poaceae OsSGL ortholog genes conferred remarkably increased grain length, weight, and seed setting percentage, as well as significantly improved drought-stress tolerance in transgenic rice. Microscopical analysis also showed that the transgene expression promoted cell division and development. RNA-seq and qRT-PCR analyses revealed 73.8% (18,711) overlapped DEGs in all transgenic plants. Moreover, GO and KEGG analyses of different comparisons revealed that the key DEGs participating in drought stress-response belonged to hormone (especially auxin and cytokinin) pathways, and signaling processes were apparently affected in the young panicles. ConclusionTogether, these results suggest the four OsSGL orthologs perform a conserved function in regulating stress-tolerance and cell growth by acting via a hormone biosynthesis and signaling pathway. It may also induce a strategy for tailor-made crop yield improvement.

scholarly journals Identification and characterization of circular RNAs regulating genes responsible for drought stress tolerance in chickpea and soybean

2020 ◽  
Vol 80 (01) ◽  
Author(s):  
Tanwy Dasmandal ◽  
A. R. Rao ◽  
Sarika Sahu
Keyword(s):  
Drought Stress ◽  
Stress Tolerance ◽  
Target Genes ◽  
Circular Rnas ◽  
Tolerance Mechanism ◽  
Drought Stress Tolerance ◽  
Response To Stress ◽  
Leguminous Crops ◽  
And Control

With the development of efficient algorithms, it has become feasible to unravel complex drought stress tolerance mechanism in leguminous crops. Even though the role of coding genes in drought stress tolerance mechanism is known to certain extent, the role of non-coding RNAs (ncRNAs) like circular RNAs (circRNAs) is unknown in leguminous crops like chickpea and soybean. Hence, a study has been taken up to predict the circular RNAs from the transcriptomes of chickpea and soybean and to study the circRNA-miRNA-mRNA interactions thereby identify the endogenous target mimics (eTMs). The in silico results revealed the presence of circRNAs in both the crop transcriptomes and their differential expressions under drought stress and control conditions. Besides, our findings showed three predicted eTMs where circRNAs acted as sponge for miRNAs that target genes like Glyma.18G065200.1 in soybean and XM_004517122, XM_027336693 in chickpea. The targeted genes are involved in various drought stress responsive mechanism through their activities in hormone signal transduction, response to stress, response to auxin and transcription factor activity.

scholarly journals Pathways of wheat drought stress tolerance improvement under the influence of endophytic bacteria Bacillus subtilis

2020 ◽  
Author(s):  
Ch. R. Allagulova ◽  
A. M. Avalbaev ◽  
O. V. Lastochkina
Keyword(s):  
Bacillus Subtilis ◽  
Drought Stress ◽  
Plant Growth ◽  
Stress Tolerance ◽  
Endophytic Bacteria ◽  
Drought Stress Tolerance ◽  
Plant Growth Promoting ◽  
Growth Promoting ◽  
Tolerance Improvement

Endophytic bacteria Bacillus subtilis, which belongs to plant growth promoting microorganisms, are considered as an alternative to agrochemicals for increasing of wheat drought stress tolerance.

The Role of BananaMaASR1in Drought Stress Tolerance

2014 ◽  
Vol 49 (5) ◽  
pp. 548
Author(s):  
Miao Hongxia ◽  
Wang Yuan ◽  
Xu Biyu ◽  
Liu Juhua ◽  
Jia Caihong ◽  
...  
Keyword(s):  
Drought Stress ◽  
Stress Tolerance ◽  
Drought Stress Tolerance

scholarly journals The CEP5 Peptide Promotes Abiotic Stress Tolerance, As Revealed by Quantitative Proteomics, and Attenuates the AUX/IAA Equilibrium in Arabidopsis

2020 ◽  
Vol 19 (8) ◽  
pp. 1248-1262 ◽  
Author(s):  
Stephanie Smith ◽  
Shanshuo Zhu ◽  
Lisa Joos ◽  
Ianto Roberts ◽  
Natalia Nikonorova ◽  
...  
Keyword(s):  
Abiotic Stress ◽  
Drought Stress ◽  
Stress Tolerance ◽  
Quantitative Proteomics ◽  
Plant Hormone ◽  
Abiotic Stress Tolerance ◽  
Auxin Signaling ◽  
Transcriptional Repressors ◽  
Drought Stress Tolerance

Peptides derived from non-functional precursors play important roles in various developmental processes, but also in (a)biotic stress signaling. Our (phospho)proteome-wide analyses of C-TERMINALLY ENCODED PEPTIDE 5 (CEP5)-mediated changes revealed an impact on abiotic stress-related processes. Drought has a dramatic impact on plant growth, development and reproduction, and the plant hormone auxin plays a role in drought responses. Our genetic, physiological, biochemical, and pharmacological results demonstrated that CEP5-mediated signaling is relevant for osmotic and drought stress tolerance in Arabidopsis, and that CEP5 specifically counteracts auxin effects. Specifically, we found that CEP5 signaling stabilizes AUX/IAA transcriptional repressors, suggesting the existence of a novel peptide-dependent control mechanism that tunes auxin signaling. These observations align with the recently described role of AUX/IAAs in stress tolerance and provide a novel role for CEP5 in osmotic and drought stress tolerance.

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