栽培密度对有色稻抽穗后剑叶一些衰老生理特性的影响

以黑糯和红粳两个有色稻为材料,设5种不同的栽培密度,研究了不同栽培密度对有色稻抽穗后剑叶的叶绿素含量、可溶性蛋白质含量和SOD酶活性等一些衰老生理指标的影响。结果表明：随栽培密度的增加,有色稻抽穗后剑叶叶绿素a、b含量、可溶性蛋白质含量和SOD酶活性均呈下降趋势,而叶绿素a/b值和丙二醛含量呈上升趋势,且高密度E处理下这些指标变化幅度较大,衰老加快。试验还表明,有色稻抽穗后剑叶叶绿素含量、SOD酶活性、丙二醛含量等衰老生理指标的变化幅度与品种的耐密性密切相关。

Effects of Different Density on Some Senescence Physiology Characteristics of Flag Leaf in Colored Rice after Heading

Some senescence physiology characteristics of flag Leaf in colored rice, such as the content of chlorophyll and soluble protein and the SOD activities, were studied under five different densities with two colored rice of black glutinous and red japonica. The results indicated that with increasing planting density, the content of chlorophyll a and b, the soluble protein content and the SOD activities were decreased, but the ratio of Chla-Chlb and MDA content were increased, and these senescence physiology characteristics of E treatment were deceased with a large variation scope and early senescence of flag leaf. These results suggested that chlorophyll content, MDA content and the SOD activities are correlated significantly to density resistance of colored rice.