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<p>Drought is considered as one of the key limiting factors for oilseed crop production and productivity in India. <i>Brassica juncea</i> L. (Indian mustard) is one of the most important oilseed crops and is considerably affected by drought stress. This study aimed to evaluate the effects of drought stress at seedling and flowering stages of Indian mustard. Various morphological and physio-biochemical parameters were studied for screening of six varieties (RH1566, RH749, RH725, RH8812, RH761 and RH30) of Indian mustard. Out of six varieties, four varieties (RH30, RH1566, RH725 and RH8812) of Indian mustard were selected for pot experiment. <b>The results demonstrated considerable response of drought stress regarding the various studied attributes</b>. The antioxidant enzymes viz. superoxide dismutase, peroxidase, ascorbate peroxidase and glutathione reductase showed higher activities in the leaves of drought-tolerant varieties compared to those of drought-sensitive varieties. The content of ascorbic acid, carotenoids, total glutathione and proline content were also recorded higher in RH725 and RH1556 varieties than in RH8812 and RH30 varieties under drought stress. Among four selected varieties, RH725 and RH1556 were found to be tolerant variety due to their ability to retain larger levels of photosynthetic pigments, more water content, antioxidant enzymes, and low saturation in reduced water content. This study could aid plant breeders and physiologists to design particular ways to alleviate the negative impacts of drought and maximise Indian mustard crop output by better understanding the underlying processes of drought stress tolerance in Indian mustard.</p>

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Drought-induced differential biochemical and morphological responses in Indian mustard

  • 期刊论文

  • 发表日期：

    2025年1月31日

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  • Reena Sharma,
  • Nita Lakra,
  • Annu Luhach,
  • Shaistul Islam,
  • Abbu Zaid

摘要

Drought is considered as one of the key limiting factors for oilseed crop production and productivity in India. Brassica juncea L. (Indian mustard) is one of the most important oilseed crops and is considerably affected by drought stress. This study aimed to evaluate the effects of drought stress at seedling and flowering stages of Indian mustard. Various morphological and physio-biochemical parameters were studied for screening of six varieties (RH1566, RH749, RH725, RH8812, RH761 and RH30) of Indian mustard. Out of six varieties, four varieties (RH30, RH1566, RH725 and RH8812) of Indian mustard were selected for pot experiment. The results demonstrated considerable response of drought stress regarding the various studied attributes. The antioxidant enzymes viz. superoxide dismutase, peroxidase, ascorbate peroxidase and glutathione reductase showed higher activities in the leaves of drought-tolerant varieties compared to those of drought-sensitive varieties. The content of ascorbic acid, carotenoids, total glutathione and proline content were also recorded higher in RH725 and RH1556 varieties than in RH8812 and RH30 varieties under drought stress. Among four selected varieties, RH725 and RH1556 were found to be tolerant variety due to their ability to retain larger levels of photosynthetic pigments, more water content, antioxidant enzymes, and low saturation in reduced water content. This study could aid plant breeders and physiologists to design particular ways to alleviate the negative impacts of drought and maximise Indian mustard crop output by better understanding the underlying processes of drought stress tolerance in Indian mustard.