PHYSIOLOGICAL EVALUATION OF MUNGBEAN VARIETIES FOR LOW LIGHT STRESS TOLERANCE

Abstract

An experiment was carried out to study the performance of mungbean varieties under different light levels and to find out the potential mungbean variety that would be cultivated as an intercrop at the Research Field of the dept. of Crop Physiology and Ecology , Hajee Mohammad Danesh Science and Technology University (HSTU), Dinajpur during the period from March to June 2016.The experiment was laid out in a split plot design with three replications. Three light levels (L100 - 100 % of full sunlight, L75- 75 % of full sunlight and L50- 50% of full sunlight) were considered as vii main plot treatment and four mungbean varieties (BARl Mung-6, BINA Mung-8, BINA Mung-5 and BU Mug-4) were considered as subplots. Mosquito nets of different color and pore size were used to create 75 and 50 percent of full sunlight. The seed yield (t ha-1) of BARI Mung-6 and BINA Mung-8 remained stable under partial shade condition but the seed yield of BINA Mung-5 and BU Mug-4 were reduced drastically under partial shade condition. Better leaf dry weight, greater proline accumulation in leaf, higher leaf chlorophyll content, higher pods plant-1, higher seeds pod-1, greater grain size and better grain yield plant under partial shade condition were contributed to better tolerance of BARI Mung-6 and BINA Mung-8 under low light stress.