An experiment was carried out at Sher-e-Bangla Agricultural University, Dhaka, Bangladesh during the period from March to July 2014. Plants were grown in the rain protected polyethylene shelter or shed to avoid rain under natural conditions in the earthen pots. The experiment was conducted on the leaf traits of aus rice varieties in various soil moisture levels in three rice genotypes as BRRI dhan55 (V1), BR6976-2B-15 (V2) and tolerant check Hashikalmi (V3) and seven water stress was imposed as treatments. Treatments were 0 days water stress (control) irrigated continuously throughout the experimental period (T0). From twenty days onwards water stress was imposed for seven days when the age of the seedling was 20 days (T1), 35 days (T2), 55 days (T3), 75 days (T4), 95 days (T5) and 115 days (T6). Our findings suggest that BRRI dhan55 and Hashikalmi produced the highest number of leaf, leaf areas, comparatively higher SPAD value, specific leaf area, specific leaf weight, relative water content (RWC), stomatal conductance and anthocyanins content. Leaf accumulates anthocyanins under drought conditions and the red color increased as the intensity of water stress increased. Under water stress condition RWC were significantly reduced. RWC declined with increasing water stress. It was revealed that BRRI dhan55 and Hashikalmi showed comparatively higher leaf investment under water stress condition.
Cite this paper
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