Understanding and Mitigating the Impacts of Drought Stress in Cotton- A Review

Saleem, Muhammad Farrukh; Aown, Muhammad; Raza, Sammar; Ahmad, Sayeed; Shahid, Abdul Manan

doi:10.21162/pakjas/16.3341

Cited by 25 publications

(25 citation statements)

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“…Researchers showed that the higher leaf turgor potential resulted in the accumulation of osmotic materials such as total sugar content (Ali and Radwan, 2008;Chutia and Borah, 2012;Saleem et al, 2016;Raza et al, 2017). We also found that the contents of total sugar and proline significantly increased under PRD irrigation (Figs.…”

Section: Prd Affecting the Biochemical Traits Of Cottonsupporting

confidence: 54%

“…Previous studies revealed that activities of these enzymes significantly increased under PRD irrigation (Javanovic and Stikic, 2018), thus reducing the harmful effects of drought in cotton (Ullah et al, 2017). Similarly, mulching maintains the water balance (osmotic and turgor potentials) that is necessary for normal cotton growth (Saleem et al, 2016). As the application of PRD or mulching is favorable for counteracting drought so their combination should be investigated to estimate the extent of drought mitigation in cotton.…”

Section: Introductionmentioning

confidence: 99%

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Physiological and biochemical appraisal for mulching and partial rhizosphere drying of cotton

Iqbal

Muhammad

et al. 2019

J. Arid Land

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Water is the main factor for the healthy life of plant. One of the main negative effects of climate change is the increasing scarcity of water that is lethal for plant. Globally, for water deficit regions (arid and semi-arid), drought is the main factor responsible for low production of agriculture, especially for cotton. Great efforts have been and are being made to find alternatives to water saving practices. This study aimed to examine the effects of partial rhizosphere drying (PRD, half of the root system irrigated at one event, and the other half irrigated in the next event, and so on) with and/or without various mulching treatments on physiological and biochemical traits of cotton. To explore this objective, we laid out experiments in completely randomized design with factorial arrangement in the Islamia University of Bahawalpur, Pakistan in 2016. Two factors included were four mulching treatments (M 0 , no mulching; M 1 , black plastic mulching; M 2 , wheat straw mulching; and M 3 , cotton sticks mulching) and two irrigation levels (I 0 , control (full irrigation); and I 1 , PRD). Fisher's analysis of variance among means of treatments was compared using least significant difference test at 5% probability level. Results revealed that the maximum plant height, leaf area, leaf gas exchange (photosynthetic rate and stomata conductance), chlorophyll, proline and total sugar contents, and enzyme activities were higher under M 2 than under other three mulching treatments. As for irrigation levels, higher values of plant height, photosynthesis and water related parameters (leaf water potential, leaf osmotic potential, leaf turgor potential, etc.) were recorded. Contents of total sugar and proline and activities of antioxidant enzymes were significantly higher in PRD-treated plants than in control plants. It was concluded that combined application of PRD and mulching was more effective than the rest of the treatments used in the experiment. Similar study can be conducted in the field by applying irrigation water in alternate rows in semi-arid regions.

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Section: Prd Affecting the Biochemical Traits Of Cottonsupporting

confidence: 54%

Section: Introductionmentioning

confidence: 99%

Physiological and biochemical appraisal for mulching and partial rhizosphere drying of cotton

Iqbal

Muhammad

et al. 2019

J. Arid Land

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“…Cotton is an important textile fiber and oil seed crop [ 33 ]; however, the repercussions of climate change, particularly drought stress, are severely limiting its production globally [ 34 ]. Our laboratory previously released Gossypium arboreum sequencing data [ 35 ] and RNA-seq studies have revealed hormone crosstalk, whereby MYB TFs are implicated in modifying plant responses toward drought and NaCl stresses in different tissues [ 36 ].…”

Section: Introductionmentioning

confidence: 99%

GaMYB85, an R2R3 MYB gene, in transgenic Arabidopsis plays an important role in drought tolerance

et al. 2017

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BackgroundMYB transcription factors (TFs) are one of the largest families of TFs in higher plants and are involved in diverse biological, functional, and structural processes. Previously, very few functional validation studies on R2R3 MYB have been conducted in cotton in response to abiotic stresses. In the current study, GaMYB85, a cotton R2R3 MYB TF, was ectopically expressed in Arabidopsis thaliana (Col-0) and was functionally characterized by overexpression in transgenic plants.ResultsThe in-silico analysis of GaMYB85 shows the presence of a SANT domain with a conserved R2R3 MYB imperfect repeat. The GaMYB85 protein has a 257-amino acid sequence, a molecular weight of 24.91 kD, and an isoelectric point of 5.58. Arabidopsis plants overexpressing GaMYB85 exhibited a higher seed germination rate in response to mannitol and salt stress, and higher drought avoidance efficiency than wild-type plants upon water deprivation. These plants had notably higher levels of free proline and chlorophyll with subsequent lower water loss rates and higher relative water content. Germination of GaMYB85 transgenics was more sensitive to abscisic acid (ABA) and extremely liable to ABA-induced inhibition of primary root elongation. Moreover, when subjected to treatment with different concentrations of ABA, transgenic plants with ectopically expressed GaMYB85 showed reduced stomatal density, with greater stomatal size and lower stomatal opening rates than those in wild-type plants. Ectopic expression of GaMYB85 led to enhanced transcript levels of stress-related marker genes such as RD22, ADH1, RD29A, P5CS, and ABI5. ConclusionsOur results indicate previously unknown roles of GaMYB85, showing that it confers good drought, salt, and freezing tolerance, most probably via an ABA-induced pathway. These findings can potentially be exploited to develop improved abiotic stress tolerance in cotton plants.Electronic supplementary materialThe online version of this article (doi:10.1186/s12870-017-1078-3) contains supplementary material, which is available to authorized users.

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“…Stress triggered the degradation of chlorophyll which ultimately decreased carbon availability for biosynthesis of antioxidants in cotton. Early senescence also downregulated synthesis of osmoprotectants and thereby disrupted water relations under stress environment (Saleem et al 2016;Saleem et al 2018c). Disturbances in water relations caused by chlorophyll degradation were related to inhibition of ribulose-1,5-bisphosphate carboxylase activities in cotton under stress conditions (Zahoor et al 2017).…”

Section: •-mentioning

confidence: 99%

Exogenous Selenium-Instigated Physiochemical Transformations Impart Terminal Heat Tolerance in Bt Cotton

Saleem

Kamal

Shahid

et al. 2019

J Soil Sci Plant Nutr

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High temperature during reproductive stages of cotton is a major constraint to achieve potential yield of cotton. The aim of the present study was to determine comparative thermo-sensitivity of squaring and flowering, to optimize exogenous selenium for heat-stressed cotton, and to explore correlation among physiochemical and morphological attributes. The experiment was conducted during 2013 and repeated during 2014. The experiment was laid out in randomized complete block design under split plot arrangement and replicated thrice. Treatments were comprised of heat stress (H 0 = no heat imposition; H 1 = heat imposition at squaring; and H 2 = heat imposition at flowering) in main plot and varying foliar selenium concentrations (Se 0 = water spray/control; Se 50 = 50; Se 100 = 100; and Se 150 = 150 mg L-1 selenium) in split plot. Significantly, more antioxidants, chlorophyll contents, water relation attributes, seed cotton yield, and lesser hydrogen peroxide were recorded with 150 mg L-1 foliar selenium compared with other concentrations under H 0. While under H 1 and H 2 , statistically similar and significantly more antioxidants, chlorophyll contents, water relation attributes, seed cotton yield, and lesser hydrogen peroxide were observed for 100 and 150 mg L-1 selenium compared with other selenium concentrations. Conclusively, H 2 proved more thermolabile compared with H 1 , and application of 150 mg L-1 foliar selenium effectively alleviated adverse effects of heat. Moreover, we observed strong and significant associations of all physiochemical attributes with seed cotton yield.

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Understanding and Mitigating the Impacts of Drought Stress in Cotton- A Review

Cited by 25 publications

References 120 publications

Physiological and biochemical appraisal for mulching and partial rhizosphere drying of cotton

Physiological and biochemical appraisal for mulching and partial rhizosphere drying of cotton

GaMYB85, an R2R3 MYB gene, in transgenic Arabidopsis plays an important role in drought tolerance

Exogenous Selenium-Instigated Physiochemical Transformations Impart Terminal Heat Tolerance in Bt Cotton

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