Recent Molecular Advances on Downstream Plant Responses to Abiotic Stress

Reis, Sávio Pinho dos; Lima, Aline Medeiros; Souza, Cláudia Regina Batista de

doi:10.3390/ijms13078628

Cited by 147 publications

(54 citation statements)

References 139 publications

(173 reference statements)

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“…Proline plays a significant role as an endogenous osmotic regulator and its accumulation in plant tissues enhance their stress tolerance (Munns et al, 2006;Dos-Reis et al, 2012;Shahbaz et al, 2012). Similar increase in endogenous proline was also observed in all cucumber genotypes in response to salinity.…”

Section: Discussionsupporting

confidence: 52%

Alleviation of Salt Stress in Cucumber (Cucumis sativus) through Seed Priming with Triacontanol

Sarwar¹

2017

IJAB

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The present study elucidated the role of triacontanol in regulating seed germination and seedling vigour of four cucumber cultivars under salt stress (50 mM NaCl). Seeds were soaked in aerated solution of triacontanol @ 25 μM, 50 μM for 12 h prior to sowing and untreated seeds were used as control. Priming enhanced the emergence rate, uniformity and early growth of cucumber seedlings under normal and saline conditions. Though, plants exposed to salt stress and seeds not treated with triacontanol showed poor performance in growth, physiology and biochemical attributes. However, priming with 25 and 50 μM triacontanol was very effective in decreasing time to start emergence, improved final emergence, shoot/root lengths, seedling dry weight, gas exchange attributes, chlorophyll and proline contents under saline conditions. Nonetheless, maximum relief from salt stress in all attributes was observed at 50 μM triacontanol. In conclusion, triacontanol can be successfully employed to improve the germination capacity and stand establishment of cucumber under saline conditions by reducing the deleterious effects of salinity.

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Section: Discussionsupporting

confidence: 52%

Alleviation of Salt Stress in Cucumber (Cucumis sativus) through Seed Priming with Triacontanol

Sarwar¹

2017

IJAB

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“…Protein denaturation occurs under HT because decreased cellular volume increases the likelihood of degradative molecular interactions. Heat shock proteins maintain and repair companion protein structure and target incorrectly aggregated and non-native proteins for degradation and removal from cells [179]. These proteins primarily function to control the proper folding and conformation of both structural ( i.e ., cell membrane) and functional ( i.e.…”

Section: Molecular and Biotechnological Strategies For Developmentmentioning

confidence: 99%

Physiological, Biochemical, and Molecular Mechanisms of Heat Stress Tolerance in Plants

Hasanuzzaman

Nahar

Alam

et al. 2013

IJMS

1,535

911

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High temperature (HT) stress is a major environmental stress that limits plant growth, metabolism, and productivity worldwide. Plant growth and development involve numerous biochemical reactions that are sensitive to temperature. Plant responses to HT vary with the degree and duration of HT and the plant type. HT is now a major concern for crop production and approaches for sustaining high yields of crop plants under HT stress are important agricultural goals. Plants possess a number of adaptive, avoidance, or acclimation mechanisms to cope with HT situations. In addition, major tolerance mechanisms that employ ion transporters, proteins, osmoprotectants, antioxidants, and other factors involved in signaling cascades and transcriptional control are activated to offset stress-induced biochemical and physiological alterations. Plant survival under HT stress depends on the ability to perceive the HT stimulus, generate and transmit the signal, and initiate appropriate physiological and biochemical changes. HT-induced gene expression and metabolite synthesis also substantially improve tolerance. The physiological and biochemical responses to heat stress are active research areas, and the molecular approaches are being adopted for developing HT tolerance in plants. This article reviews the recent findings on responses, adaptation, and tolerance to HT at the cellular, organellar, and whole plant levels and describes various approaches being taken to enhance thermotolerance in plants.

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“…Accumulation of compatible solutes, such as glycine betaine, proline and polyols, in the cytoplasm is required to balance the decrease in water potential occurring in the vacuole due to ion accumulation in that compartment (dos Reis et al , 2012). It is well established that compatible organic solutes increase with salt stress; however, whether a greater increase in compatible solutes correlates with increased salinity tolerance in plants remains to be shown.…”

Section: Introductionmentioning

confidence: 99%

Evaluating physiological responses of plants to salinity stress

Negrão

Schmöckel

Tester

2016

Ann Bot

849

491

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Background Because soil salinity is a major abiotic constraint affecting crop yield, much research has been conducted to develop plants with improved salinity tolerance. Salinity stress impacts many aspects of a plant’s physiology, making it difficult to study in toto. Instead, it is more tractable to dissect the plant’s response into traits that are hypothesized to be involved in the overall tolerance of the plant to salinity.Scope and conclusions We discuss how to quantify the impact of salinity on different traits, such as relative growth rate, water relations, transpiration, transpiration use efficiency, ionic relations, photosynthesis, senescence, yield and yield components. We also suggest some guidelines to assist with the selection of appropriate experimental systems, imposition of salinity stress, and obtaining and analysing relevant physiological data using appropriate indices. We illustrate how these indices can be used to identify relationships amongst the proposed traits to identify which traits are the most important contributors to salinity tolerance. Salinity tolerance is complex and involves many genes, but progress has been made in studying the mechanisms underlying a plant’s response to salinity. Nevertheless, several previous studies on salinity tolerance could have benefited from improved experimental design. We hope that this paper will provide pertinent information to researchers on performing proficient assays and interpreting results from salinity tolerance experiments.

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Recent Molecular Advances on Downstream Plant Responses to Abiotic Stress

Cited by 147 publications

References 139 publications

Alleviation of Salt Stress in Cucumber (Cucumis sativus) through Seed Priming with Triacontanol

Alleviation of Salt Stress in Cucumber (Cucumis sativus) through Seed Priming with Triacontanol

Physiological, Biochemical, and Molecular Mechanisms of Heat Stress Tolerance in Plants

Evaluating physiological responses of plants to salinity stress

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