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<p>The unpredicted rise in temperature is severely affecting plant growth and productivity. To avoid future food shortages, crop yield protection is probably the greatest challenge being faced by modern agriculture. In the present study, we assessed the response of 19 wheat cultivars to high temperature and subsequent developmental stages during three successive field trials following a Randomized Block Design (RBD) with three replications. In one of the growing seasons, wheat leaf samples at different developmental stages (booting, anthesis and milking) were analyzed for membrane stability, relative leaf water content and antioxidative enzyme activity. After harvesting, the crop was analyzed for yield-related parameters. The rise in temperature dramatically affected membrane stability at different stages of development. Distinct yield parameters recorded indicated variation in the yield potential of wheat cultivars. Principal Component Analysis showed that the PBW and KRL cultivars were positively correlated to yield parameters and negatively correlated to height and biomass. Membrane damage was more prominent during the milking (grain filling) stage and positively correlated with antioxidant enzyme activity. These outcomes suggest that wheat cultivars have the varied potential for thermotolerance, and it depends upon water status which could be further useful to develop heat tolerant varieties in breeding programs.</p>

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Terminal high temperature stress implications in wheat development: superior thermotolerance is linked to water status and antioxidant efficiency

  • 期刊论文

  • 发表日期：

    2026年2月24日

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  • Rashpal Kumar,
  • Rashmi Saini,
  • Arindam Adhikary,
  • Sanjeev Kumar

摘要

The unpredicted rise in temperature is severely affecting plant growth and productivity. To avoid future food shortages, crop yield protection is probably the greatest challenge being faced by modern agriculture. In the present study, we assessed the response of 19 wheat cultivars to high temperature and subsequent developmental stages during three successive field trials following a Randomized Block Design (RBD) with three replications. In one of the growing seasons, wheat leaf samples at different developmental stages (booting, anthesis and milking) were analyzed for membrane stability, relative leaf water content and antioxidative enzyme activity. After harvesting, the crop was analyzed for yield-related parameters. The rise in temperature dramatically affected membrane stability at different stages of development. Distinct yield parameters recorded indicated variation in the yield potential of wheat cultivars. Principal Component Analysis showed that the PBW and KRL cultivars were positively correlated to yield parameters and negatively correlated to height and biomass. Membrane damage was more prominent during the milking (grain filling) stage and positively correlated with antioxidant enzyme activity. These outcomes suggest that wheat cultivars have the varied potential for thermotolerance, and it depends upon water status which could be further useful to develop heat tolerant varieties in breeding programs.