Department of Horticulture, The Hebrew University of Jerusalem, Rehovot, Israel.
Plant Physiol. 1978 Aug;62(2):295-8. doi: 10.1104/pp.62.2.295.
The role of alpha-naphthaleneacetic acid (NAA) in the control of abscission in Citrus (Citrus sinensis L. Osbeck) leaf explants and its conjugation were studied in non-aged and 24-hour-aged explants. Dipping non-aged explants in 1.5 micromolar NAA for 15 minutes immediately after excision did not delay abscission whereas 150 micromolar NAA effectively delayed it. As incubation time was prolonged up to 24 hours after excision, the delaying effect of both concentrations gradually increased. In general, both concentrations did not delay abscission when applied to 24-hour-aged explants held for an additional period of up to 24 hours. The uptake and conjugation of (14)C-NAA to glucose and aspartic acid were similar in petiole, abscission zone, and leaf blade of non-aged and aged tissues, for all NAA concentrations. No correlation was established between the kinetics of abscission and the rate of conjugation in the abscission zone.
α-萘乙酸（NAA）在控制柑橘（Citrus sinensis L. Osbeck）叶片外植体脱落中的作用及其共轭物的研究在未老化和 24 小时老化的外植体中进行。将未老化的外植体在切割后立即浸入 1.5 微摩尔 NAA 中 15 分钟不会延迟脱落，而 150 微摩尔 NAA 则有效地延迟了脱落。随着培养时间延长至切割后 24 小时，两种浓度的延迟效果逐渐增加。一般来说，当应用于 24 小时老化的外植体并再延长 24 小时时，两种浓度都不会延迟脱落。在所有 NAA 浓度下，叶柄、脱落区和未老化和老化组织的叶片中，（14）C-NAA 对葡萄糖和天冬氨酸的摄取和共轭物相似。在脱落区，脱落的动力学与共轭物的速率之间没有建立相关性。
