摘要
对小麦灌浆期不同叶位叶片的 5大类激素含量测定结果表明 ,正在衰老叶片的乙烯和脱落酸 (ABA)含量明显增加 ,前期和中期的功能期叶片细胞分裂素 (玉米素和玉米素核苷 ,Z +ZR)和赤霉素 (GA3)含量较高 ,生长素 (IAA)在功能期和后期衰老的叶片中含量较高。因此可以将这 4种激素分为 2大类 ,即乙烯和ABA诱发和促进叶片衰老 ,另一类的Z +ZR和GA3则维持叶片功能 ,抑制衰老。但IAA表现了具有前期保持叶片生长发育和后期促进衰老的双重作用。在不同叶片中 ,春 6叶 (旗叶 )则比较复杂。旗叶与其他叶片相比表现了特殊性 。
Contents of five kinds of phytohormones in different leaves were tested during filling period. The results showed that the contents of ethylene and ABA in the senescing leaves increased obviously, the contents of Z+ZR and GA 3 in the effective leaves also got higher during the initial and middle filling periods, but the flag leaf showed complex. Therefore, the phytohormones can be divided into two parts, one was ABA and ethylene that induced and prompted senesce, and the other parts was GA 3 and Z+ZR that maintained the functional leaves and inhibited senesce. IAA showed double functions that maintained growth in the earlier filling period, and that promoted the senescing period in the later filling period. In addition, flag leaf was very special, perhaps due to its important function.
出处
《华北农学报》
CSCD
北大核心
2000年第2期53-56,共4页
Acta Agriculturae Boreali-Sinica
基金
北京市科技新星 !(95 1 870 90 0 )
国家自然科学基金资助项目! (39770 436 )
