The results showed that: the number of primary branches, secondary branches, and spikelets were closely associated with the number of vascular bundle.

结果表明，维管束数目与一、二次枝梗数及颖花数有密切关系。

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The root-stem transition region and the root in the elder plant reproduce the abnormal secondary structure which is similar to the rode caused by separation of the vascular bundle.

在多年生植株根茎过渡区出现的“绳索状”异常结构则是由于其内部维管束裂分的结果。

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