Resistance/Tolerance Mechanism under Water Deficit (Drought) Condition in Plants

Gobu, Omprakash R.; Baghel, Prashant Bisen Murlimanohar; Chourasia, Kumar Nishant

doi:10.20546/ijcmas.2017.604.009

Cited by 26 publications

(16 citation statements)

References 34 publications

(46 reference statements)

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“…In addition, the poor growth status showing leaf deformation and stunted seedling growth under drought stress conditions was similar to the previous report by Zhang et al (2011) that might be due to physiological changes in the leaves, nodes, and stems, including decreased chlorophyll content and inhibition of photosynthesis due to lack of water ( Zhang et al, 2019 ). Similar results have been reported for tomato, watermelon, and other plants ( Omprakash et al, 2017 ; Moles et al, 2018 ; Li et al, 2019 ). These results were similar to those of previous studies, which found that the chlorophyll content of plants affected by drought stress was reduced in watermelon, tomato, lettuce, and Arabidopsis affected by drought stress ( Banks et al, 2018 ; Yao et al, 2018 ; Malambane et al, 2021 ; Shin et al, 2021a ).…”

Section: Discussionsupporting

confidence: 89%

Monitoring of Salinity, Temperature, and Drought Stress in Grafted Watermelon Seedlings Using Chlorophyll Fluorescence

2021

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Chlorophyll fluorescence (CF) is used to measure the physiological status of plants affected by biotic and abiotic stresses. Therefore, we aimed to identify the changes in CF parameters in grafted watermelon seedlings exposed to salt, drought, and high and low temperatures. Grafted watermelon seedlings at the true three-leaf stage were subjected to salinity levels (0, 50, 100, 150, and 200 mM) and temperature [low (8°C), moderate (24°C), and high (40°C)] stresses for 12 days under controlled environmental conditions independently. Eight CF parameters were measured at 2-day intervals using the FluorCam machine quenching protocol of the FluorCam machine. The seedlings were also exposed to drought stress for 3 days independent of salinity and temperature stress; CF parameters were measured at 1-day intervals. In addition, growth parameters, proline, and chlorophyll content were evaluated in all three experiments. The CF parameters were differentially influenced depending on the type and extent of the stress conditions. The results showed a notable effect of salinity levels on CF parameters, predominantly in maximum quantum yield (Fv/Fm), non-photochemical quenching (NPQ), the ratio of the fluorescence decrease (Rfd), and quantum yield of non-regulated energy dissipation in PSII [Y(NO)]. High temperature had significant effects on Rfd and NPQ, whereas low temperature showed significant results in most CF parameters: Fv/Fm, Y(NO), NPQ, Rfd, the efficiency of excitation capture of open photosystem II (PSII) center (Fv′/Fm′), and effective quantum yield of photochemical energy conversion in PSII [Y(PSII)]. Only NPQ and Rfd were significantly influenced by severe drought stress. Approximately, all the growth parameters were significantly influenced by the stress level. Proline content increased with an increase in stress levels in all three experiments, whereas the chlorophyll (a and b) content either decreased or increased depending upon the stressor. The results provided here may be useful for understanding the effect of abiotic stresses on CF parameters and the selection of index CF parameters to detect abiotic stresses in grafted watermelon seedlings.

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Section: Discussionsupporting

confidence: 89%

Monitoring of Salinity, Temperature, and Drought Stress in Grafted Watermelon Seedlings Using Chlorophyll Fluorescence

2021

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“…Plant breeders consider the time to flowering and plant height when they select for potentially high‐yielding genotypes, particularly under drought stress conditions (Ouk et al., 2006; Saikumar et al., 2016). Moreover, the rapid plant development and remobilization of pre‐anthesis metabolites additively contribute to drought escape (Foulkes et al., 2007; Gobu et al., 2017).…”

Section: Discussionmentioning

confidence: 99%

Imposing water deficit on modern and wild wheat collections to identify drought‐resilient genotypes

Morsy

Elbasyoni

Abdallah

et al. 2021

J Agronomy Crop Science

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Breeding for drought tolerance is the most effective approach to mitigate drought effects. The prime goal of the current study was to identify potentially drought‐tolerant wheat (Triticum aestivum L.) genotypes. Therefore, an extensive collection of wheat genotypes (2,100) was evaluated under two water regimes, that is water deficit (WD, 50% ETc ‘crop Evapotranspiration’) and well‐watered (WW, 100% of ETc) across several environments in Egypt. The number of days to flowering (NDF), plant height (PH) and grain yield (GY) were recorded under both water regimes across environments. Additionally, three yield‐based drought indices and water‐use efficiency (WUE) were calculated for the top 30% yielding genotypes (that produced economical GY; 3.58 ton ha−1 for WD and 7.5 ton ha−1 for WW). The results indicated a significant effect for environments, water stress, and genotypes, as well as the second‐ and third‐order interactions across all traits. WD significantly reduced PH, NDF, and GY by 5.0 cm, 10.6 days and 50.0%, respectively. PH, NDF and GY were highly correlated. However, the direction and magnitude of correlation under normal conditions were different from those under WD. For example, under WW conditions, late flowering and taller genotypes tended to produce higher GY. In contrast, under WD, earlier and shorter wheat genotypes tended to produce higher GY. According to the drought tolerance index (DTI), 254 genotypes were considered drought tolerance (DTI > 1). Based on WUE, DTI and GY under WD, 80 genotypes outperformed the commercially grown Egyptian cultivars. Our results implied that the evaluated collection might be a valuable source not only for drought‐tolerant genotypes but also for highly yielding water‐efficient genotypes under favourable conditions in Egypt and similar geographic regions.

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“…According to Zlatev and Lidon [13] crops have evolved several mechanisms to cope with water scarcity, including escape, tolerance, and the avoidance of tissue and cell dryness. Plant stress resistance mechanisms include rapid phenological development, increased stomatal and cuticular resistance, changes in leaf number and area [14].…”

Section: 2mentioning

confidence: 99%

The growth impact of Capsicum annuum crops in hydrogel incorporated media

Hafiz-Afham

Hasan²,

Rafii³

et al. 2023

IOP Conf. Ser.: Earth Environ. Sci.

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Increasing food and water security via sustainable agriculture is vital, particularly in light of climate change. Researchers and farmers have recently shown a great deal of interest in the agricultural applications of hydrogels. This research aims to evaluate the impact of hydrogel on Capsicum annuum crop productivity and irrigation water use effectiveness. In a polybag containing a specifically formulated mixture of hydrogel and topsoil, the pepper variety cv Bara was contained. The use of 20%, 40%, 60%, 80%, and 100% biodegradable hydrogel doses per plant was also investigated. The treatment schedule was established using a random complete block strategy. Investigated factors included water usage, irrigation frequency, plant height, leaf number, leaf area, and leaf area index. According to the study’s findings, 40 percent hydrogel and 60 percent topsoil per plant produced the optimum growth characteristics. The results of the study indicate that hydrogel able to hold water, circulating water into the media and enhancing the water usage efficiency of pepper crops without affecting plant growth.

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Resistance/Tolerance Mechanism under Water Deficit (Drought) Condition in Plants

Cited by 26 publications

References 34 publications

Monitoring of Salinity, Temperature, and Drought Stress in Grafted Watermelon Seedlings Using Chlorophyll Fluorescence

Monitoring of Salinity, Temperature, and Drought Stress in Grafted Watermelon Seedlings Using Chlorophyll Fluorescence

Imposing water deficit on modern and wild wheat collections to identify drought‐resilient genotypes

The growth impact of Capsicum annuum crops in hydrogel incorporated media

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