小麦地上茎节数的形成机理

Mechanism of formation of aboveground internode number in wheat

对冬性、半冬性和春性 3个品种类型小麦茎节生长的系统观察证明 ,小麦起身期以前 ,露尖叶以内的鞘筒中始终保持着前伸后续相继伸长的 4片幼叶 .起身期露尖叶内所包的 4片幼叶的着生节 (间 )随着生育时期推进逐渐伸长 ,和穗下节共同形成地上部的

Systematical observations on internode growth and development of winter,semi winter and spring variety wheat genotypes indicated that before re green sage there were always 4 overlappedly growing young leaves wrapped by the sheath of the leaf whose apex had just gone out of the preceding leaf sheath.As the growing process advances,those 4 nodes from which these 4 overlappedly growing young leaves generate,grow gradually up to internodes.It is these internodes together with the internode just below the ear,that constitute the five internodes on the aboveground wheat plant.