Physiological and biochemical traits of drought tolerance in Brassica juncea (L.) Czern & Coss

Cotton is an important fiber and cash crop. Extreme water scarceness affects the growth, quality, and productivity of cotton. Water shortage has threatened the future scenario for cotton growers, so it is imperative to devise a solution to this problem. In this research, we have tried to machinate a solution for it. 23 genotypes have been screened out against drought tolerance at the seedling stage by evaluating the morphological, physiological, and biochemical traits in a triplicate completely randomized design plot experiment with two water regimes [50 and 100% field capacity]. Genotypic differences for all the morphological and physiological traits revealed highly significant differences except transpiration rate (TR). Moreover, the interaction between genotype and water regime (G × W) was highly significant for root length (RL, 5.163), shoot length (SL, 11.751), excised leaf water loss (ELWL, 0.041), and stomatal conductance (SC, 7.406). A positively strong correlation was found in TR with relative water content (RWC; 0.510) and SC (0.584) and RWC with photosynthesis (0.452) under drought conditions. A negative correlation was found in SC with SL (−0.428) and photosynthesis (−0.446). Traits like RL, SL, SC, photosynthesis, proline, catalase, and malondialdehyde were visible indicators, which can differentiate drought-tolerant genotypes from the susceptible ones. A wide range of diversity was found in all the morpho-physiological traits with the cumulative variance of four principal components (PCs) 83.09% and three PCs 73.41% under normal and water-stressed conditions, respectively, as per the principal component analysis. Hence, selection criteria can be established on the aforementioned traits for the development of drought-tolerant cultivars. Moreover, it was found that out of 23 experimental varieties, NIAB-135, NIAB-512, and CIM-554 could be used to devise breeding strategies for improving drought tolerance in cotton.

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Interactive effect of potassium and flyash: a soil conditioner on metal accumulation, physiological and biochemical traits of mustard (Brassica juncea L.)

Environmental Science and Pollution Research ◽

10.1007/s11356-019-04243-w ◽

2019 ◽

Vol 26 (8) ◽

pp. 7847-7862 ◽

Cited By ~ 3

Author(s):

Farha Ashfaque ◽

Akhtar Inam

Keyword(s):

Brassica Juncea ◽

Metal Accumulation ◽

Interactive Effect ◽

Biochemical Traits ◽

Soil Conditioner ◽

Physiological And Biochemical

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Physiological and biochemical traits of drought tolerance inArgania spinosa

Journal of Plant Interactions ◽

10.1080/17429145.2015.1068386 ◽

2015 ◽

Vol 10 (1) ◽

pp. 252-261 ◽

Cited By ~ 13

Author(s):

Abdelghani Chakhchar ◽

Said Wahbi ◽

Mouna Lamaoui ◽

Abderrahim Ferradous ◽

Abdelhamid El Mousadik ◽

...

Keyword(s):

Drought Tolerance ◽

Biochemical Traits ◽

Physiological And Biochemical

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Potato Response to Drought Stress: Physiological and Growth Basis

Frontiers in Plant Science ◽

10.3389/fpls.2021.698060 ◽

2021 ◽

Vol 12 ◽

Author(s):

Taylor Gervais ◽

Alexa Creelman ◽

Xiu-Qing Li ◽

Benoit Bizimungu ◽

David De Koeyer ◽

...

Keyword(s):

Drought Tolerance ◽

Protein Content ◽

Tuber Yield ◽

Potato Crop ◽

Leaf Protein ◽

Drought Severity ◽

Biochemical Traits ◽

Russet Norkotah ◽

Drought Tolerant ◽

Physiological And Biochemical

Drought poses a major challenge to the production of potatoes worldwide. Climate change is predicted to further aggravate this challenge by intensifying potato crop exposure to increased drought severity and frequency. There is an ongoing effort to adapt our production systems of potatoes through the development of drought-tolerant cultivars that are appropriately engineered for the changing environment. The breeding of drought-tolerant cultivars can be approached through the identification of drought-related physiological and biochemical traits and their deployment in new potato cultivars. Thus, the main objective of this study was to develop a method to identify and characterize the drought-tolerant potato genotypes and the related key traits. To achieve this objective, first we studied 56 potato genotypes including 54 cultivars and 2 advanced breeding lines to assess drought tolerance in terms of tuber yield in the greenhouse experiment. Drought differentially reduced tuber yield in all genotypes. Based on their capacity to maintain percent tuber yield under drought relative to their well-watered controls, potato genotypes differed in their ability to tolerate drought. We then selected six genotypes, Bannock Russet, Nipigon, Onaway, Denali, Fundy, and Russet Norkotah, with distinct yield responses to drought to further examine the physiological and biochemical traits governing drought tolerance. The drought-induced reduction in tuber yield was only 15–20% for Bannock Russet and Nipigon, 44–47% for Onaway and Denali, and 83–91% for Fundy and Russet Norkotah. The tolerant genotypes, Bannock Russet and Nipigon, exhibited about a 2–3-fold increase in instantaneous water-use efficiency (WUE) under drought as compared with their well-watered controls. This stimulation was about 1.8–2-fold for moderately tolerant genotypes, Onaway and Denali, and only 1.5-fold for sensitive genotypes, Fundy, and Russet Norkotah. The differential stimulation of instantaneous WUE of tolerant and moderately tolerant genotypes vs. sensitive genotypes was accounted for by the differential suppression of the rates of photosynthesis, stomatal conductance, and transpiration rates across genotypes. Potato genotypes varied in their response to leaf protein content under drought. We suggest that the rates of photosynthesis, instantaneous WUE, and leaf protein content can be used as the selection criteria for the drought-tolerant potato genotypes.

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