Year: 1994
Type: article
Abstract: Growth, canopy and seed yield of mungbean were evaluated under water stress conditions at the Kyushu University Experimental Farm during the summer of 1992. Waterlogging, optimum moisture (control) and drought conditions constituted the treatments. The treatments were initiated before the onset of flowering. The results indicated that both the water stress (waterlogging and drought stress) treatments had significant adverse affect on the morpho-physiological characters of mungbean. Plants under waterlogging conditions were affected more in most of the characters studied. Lower leaf area production, low CGR and low NAR contributed to the low TDW of the waterlogged plants compared to the other two treatments.At final harvest, the difference between the two stress treatments was about 10%. The distribution pattern of the dry matter was more or less similar in all the treatments except for roots. Among the treatments, drought stressed roots had the highest dry matter and the waterlogged roots had the lowest. The roots of the waterlogged plants became fibrous. There were distinct variations in the canopy structures under different treatment conditions. Most of the foliage for plants under control and waterlogged conditions were distributed in between upper and middle strata of the canopy, while for drought stress it was from middle to lower strata. There was increase in stem dry weight with decrease in height from the top regardless of the treatments.Th maximum value for light extinction coefficient (0.82) was in the waterlogged plants. Significantly high seed yield (7.06 g per plant) was obtained in control treatment followed by drought stress (4.21 g) and waterlogging (2.30 g). Seeds per plant and pods per plant contributed more to the seed yield per plant than the other yield contributing components. It is evident from this study that mungbeangrowth, canopy and seed yield are more susceptible to waterlogging than drought stress.
DOI: 10.5109/24053
Institution: Kyushu University
Language: English
Subfield: Plant Science
Domain: Life Sciences
SDG: Zero hunger
Open Access status: green
OpenAlex ID: W2396240225