MADRAS AGRICULTURAL JOURNAL

Impact of Heat Stress on Physiological traits of Greengram

Abstract

      Abiotic stress seriously affect the productivity of legumes worldwide. Among legumes, greengram is very popular and extensively grown in India, however, the production is affected by hostile environments, especially heat stress due to climate change. The global air temperature is predicted to rise by 0.2ºC per decade, which will lead to (1.8–4.0ºC) higher temperature than the current level by 2100. In the above view, an experiment was conducted in CO 8 green gram by elevating the temperature up to 2°C and 4°C from ambient level to study the effect of elevated temperature on morpho-physiological, biochemical and yield attributes of greengram during different growth stages. The results revealed that when CO 8 greengram exposed to elevated temperature of 4°C from the ambient, showed higher variation in its growth, development and yield attributes when compared with 2ºC raise. The impact was lesser when plants subjected to an elevated temperature of 2°C from ambient when compared to 4°C raise. This study helps us to know the response of green gram to different elevated temperature at various crop growth stages.Thus, the present investigation opened new vistas in the field of developmental physiology for identifying the heat tolerant genotypes in greengram..
Key Words: Mercury, Spiked soil, Amaranthus, Marigold