IMPACT OF TEMPERATURE STRESS ON THE FUNCTIONAL EFFICIENCY OF Brassica napus SEEDLINGS | Asian ..

The aim of this study was to see how temperature stress affected the morpho-physiological characteristics and photosynthetic pigments of Brassica napus L. seedlings exposed to oxidative stress caused by high (40°C) and low (4°C) temperatures. Experiments were conducted at the Senior Laboratory, P.G. Department of Botany, Khalsa College, Amritsar, for this purpose. The effect of different temperatures (4°C and 40°C) on B. napus L. seedlings primed with double distilled water was examined.Different degrees of temperature were used in this analysis, and the effects on the shoots were varie.Lightquenching pigments such as chlorophyll a, chlorophyll b, total chlorophyll, and total carotenoids content, as well as root duration. When compared to control and low temperature treated seedlings, low temperature (4°C) treatment degraded all aspects of growth and physiology by reducing photosynthetic pigments and changing the carbon composition negatively. When compared to control and low temperature treated seedlings, high temperature treatment degraded all aspects of growth, physiological, and biochemical components. In conclusion, both low and high temperatures (4°C and 40°C) reduce morphophysiological portion improvement, nutrient reallocation, and photosynthetic machinery modulation.

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