水稻对幼穗形成期水分胁迫后复水的响应

The Responding of Rice after Water Stress in Young Panicle Formation Stage

为了研究水分胁迫复水后对水稻部分指标的影响,以冈优527为试材,通过对水稻幼穗形成期不同时间和不同程度的水分胁迫处理后复水,研究了复水后水稻生理、生化及产量等指标的变化。结果表明:产量与结实率、千粒质量、有效穗以及实粒数都表现为受轻度短期干旱的处理在复水后均提高,高于对照水平;水势受到水分胁迫后降低;可溶性糖、SOD(超氧化物歧化酶)、POD(过氧化物酶)、CAT(过氧化氢酶)、MDA(丙二醛)的活性都表现为轻度短期干旱的水稻恢复效果最好,且活性都低于对照处理。说明水稻在幼穗形成期受到轻度短期干旱胁迫,复水后会达到节水、增产的效果。

In order to study some indicators of water on rice after water stress,through the study of different time and different degrees of water stress in young panicle formation stage of rice,to study the effects of rice physiology,biochemistry and yield;The results showed that：yield,filled grain per panicle,spikelet,panicle,1 000-grain weight,seed setting rate,filling ratio at short-duration treatment was much higher than that of the control level,water potential reduced,soluble content,SOD,POD,CAT and MDA were achieved a good level after rewatering 7 days in short duration treatment.To showed that the rice young panicle formation was suffered at short-duration treatment was capable of saving water and increasing production after rewater.