Photosynthesis transpiration, dry matter accumulation and yield performance of mungbean in response to water stress
1989
Hamid, A. | Agata, W. | Kubota, F.
Photosynthetic components, dry matter accumulation and yield production of water stressed mungbean (Vigna radiata L.) Wilczek) were compared with those of non-stressed well watered plants in a semi-controlled environment. Mungbean plants were subjected to variable water stress at three growth stages viz. pre-flowering, flowering and pod development. Soil water deficits reduced grain yield to varying degrees depending on the severity of stress and stage of crop growth. Water deficit at pre-flowering stage affected the crop performance most. Soil saturation caused yield loss to the extent of 73% compared with well watered plants. The yield loss was primarily through reduced canopy development, inhibition of photosynthetic rates, and lower dry matter production. Optimal soil moisture for photosynthetic performance was found to be around 0.15 cm (3) cm(-3) irrespective of growth stages of mungbean.
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