【摘要】 以亲本V20B(易穗上发芽)和金23B(不易穗上发芽)为材料,研究了水稻籽粒在田间穗上发芽的生理基础。结果表明:在相同试验条件下,V20B比金23B更易穗上发芽;V20B穗萌前内源激素GA3/ABA含量比值高于金23B,而ABA含量低于金23B;籽粒发育过程中的α-淀粉酶活性、籽粒含水量均高于金23B。更多还原

【Abstract】 Hybrid rice parental lines V20B(an easily-sprouting line) and Jin 23B(a hardly-sprouting line) were used as the experimental materials to study the physiological basis of preharvest sprouting of rice grains.The results showed that V20B was easier to sprout than Jin 23B,and the easily-sprouting V20B had a greater ratio of the content in grains of GA3 to ABA and a lower ABA content in grains before preharvest sprouting.In addition,in the grain development V20B had a higher α-amylase activity and a higher water content in grains than Jin 23B.更多还原