对重穗型杂交稻穗颈节间维管束特徵及其籽粒充实进行了研究。
The characteristics of vascular bundle in the first internode and grain-filling of heavy panicle hybrid rice (HPHR) were studied.
对重穗型杂交稻穗颈节间维管束特征及其籽粒充实进行了研究。
The characteristics of vascular bundle in the first internode and grain filling of heavy panicle hybrid rice (HPHR) were studied.
结果表明，基部节间与穗颈节间的伤流强度差异显著，但它们在不同时期的变化趋势却大体相同。
Results indicate: the bleeding quantity of base department and the spike neck has prominent difference, but their variation tendency in different periods is about the same.
它们之间的差异说明穗颈节间的伤流强度不但与根系活力有关，可能与叶片、茎鞘及库容活性也有密切联系。
Difference of them prove flow intensity of spike neck not only relate to roots vigor, may have close ties with the leaf, stem sheath and activity of capacity of reservoir.
GA_3对穗颈伸出长度、第一节间长度、第二节间长度和茎长有明显的促进作用，表现为随着浓度的增加的趋势。
GA_3 had promoting effect to the elongation ofpanicles extension, uppermost internode, the second internode. and the length of stem.
GA_3对穗颈伸出长度、第一节间长度、第二节间长度和茎长有明显的促进作用，表现为随着浓度的增加的趋势。
GA_3 had promoting effect to the elongation ofpanicles extension, uppermost internode, the second internode. and the length of stem.
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