Water deficit stress in the reproductive stage of four indica rice (Oryza sativa L.) supaibulwatana3
Relative water content (RWC) in the leaf of different rice cultivars dropped significantly in
relation to reduced soil water content (SWC), especially in PT1 and IR20. In contrast, the proline
content in the leaf-blade and leaf-sheath increased. The water use efficiency in rice grown under water-deficit conditions declined significantly in comparison to the control group, leading to a reduction in net-photosynthetic rate. In addition, when exposed towater-deficit, panicle length and fertile grains in KDML105 and NSG19 were stabilized, leading to greater productivity than in PT1 and IR20. These data were utilized as effective criteria for the
classification of water-deficit tolerance. From the results, KDML105 and NSG19 were identified as
water deficit-tolerant, and PT1 and IR20 as water deficit-susceptible.
Water deficit stress in the reproductive stage of four indica rice (Oryza sativa L.) supaibulwatana3 Relative water content (RWC) in the leaf of different rice cultivars dropped significantly inrelation to reduced soil water content (SWC), especially in PT1 and IR20. In contrast, the prolinecontent in the leaf-blade and leaf-sheath increased. The water use efficiency in rice grown under water-deficit conditions declined significantly in comparison to the control group, leading to a reduction in net-photosynthetic rate. In addition, when exposed towater-deficit, panicle length and fertile grains in KDML105 and NSG19 were stabilized, leading to greater productivity than in PT1 and IR20. These data were utilized as effective criteria for theclassification of water-deficit tolerance. From the results, KDML105 and NSG19 were identified aswater deficit-tolerant, and PT1 and IR20 as water deficit-susceptible.
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