In order to investigate the drought stress influence on physiological traits and grain yield of rice during the heading stage, a field experiment was conducted with four rice genotypes: indica inbred rice-Huanghuazhan，three-line indica hybrid rice-Luoyou 8, Gangyou 527 and japonica rice WDR129. The results showed that the yield was significantly decreased by 16%~22% under drought treatment （DS） compared with CK. The key reasons for the significant reduction of yield are the reduction of seed setting rate and 1 000-grain weight; photosynthetic rate, transpiration rate, leaf water potential, air-leaf temperature gap were significantly decreased under drought stress compared to CK, whereas the reduction in photosynthetic is not the dominant factor account for yield reduction. So it is necessary to make further research on dry matter accumulation and distribution after flowering; the yield of indica rice is significant higher than japonica rice under both flooding and drought stress treatments in this experiment.
YANG Xiao-Long-1, WANG Ben-Fu-1 3, CHEN Liang-1, CAO Cou-Gui-1, 2 , LI Ping-1 2*
. Effects of Drought Stress on Rice Physiological Traits and Grain Yield at Heading Stage[J]. China Rice, 2015
, 21(4)
: 138
-141
.
DOI: 10.3969/j.issn.1006-8082.2015.04.031
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