棉花和玉米对缩节安吸收、转运与分配的特征研究
he absorption and translocation of mepiquat chloride in maize(Zea mays L.) and cotton(Gossypium spp.)
缩节安在棉花和玉米上已得到广泛应用，然而其作用效果具有较大差异。本研究比较研究了玉米和棉花对缩节安的吸收效率、转运和分配，揭示缩节安在玉米和棉花上应用效果差异的机制。试验以郑单958和中植棉2号为材料，在七叶期进行缩节安定量处理，玉米叶片吸收缩节安的速率要高于棉花叶片，在处理后72小时玉米叶片吸收量为89%，而棉花叶片吸收量为64%；在缩节安转运和分配上，缩节安处理玉米第5叶96小时后，在上部叶片、下部叶片和茎秆中检测到少量的缩节安，根中没有检测到，而在棉花植株上，处理6小时后棉花植株各个部位均能检测到缩节安，并且各部位缩节安浓度随时间有明显的增加；此外，棉花处理叶片中有40%缩节安转运到植株其他部位，而玉米只有10%缩节安转运到其他部位。缩节安在玉米和棉花植株中转运速率的差异是造成其作用效果差异的主要原因之一。
he mepiquat chloride(DPC) is wildly used to regulate the growth of maize and cotton, however, the effect is differernt. This paper trys to explain the mechanism of the difference by conpairing the absorption and translocation of DPC in maize and cotton. ZhengDan 958 and ZhongZhi 2 is choosed to be experimental material. Fifth leave was treated with DPC when the plant has seven leaves. We find that the DPC absorption rate of maize leaves is higher than the cotton leaves. 72 hours after treated, maize leaves absorbt 89% of the DPC and the cotton leaves absorbt 64%. 96 hours after treated the fifth leaves, little DPC can be detected in the upper leaves, lower leaves and stems but none can be detected in the roots. However, DPC can be detected in almost every part of cotton 6 hours after treated. The quantity is increasing significantly over time. What's more, after 96 hours, 40% DPC can be delivered out of the treated leaves in cotton but only 10% can be delivered out in maize. To sum up, we believe that the difference in translocation is one of the main reason why the DPC has differernt effect on maize and cotton.
陈吟、李召虎、张明才
农作物植物学农艺学
缩节安玉米棉花吸收转运
mepiquat chloride(DPC)maizecottonabsorptiontranslocation
陈吟,李召虎,张明才.棉花和玉米对缩节安吸收、转运与分配的特征研究[EB/OL].(2012-04-17)[2025-08-10].http://www.paper.edu.cn/releasepaper/content/201204-227.点此复制
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