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，这可能与其特殊的功能有关。

关键词: 小麦, 植物激素, 乙烯, IAA, ABA, Z+ZR, GA3

Abstract: 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 GA₃ in the effective leaves also gothigher 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 GA₃ 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.

Key words: Wheat, Phytohormone, Ethylene, IAA, ABA, Z+ZR, GA₃

中图分类号: 

• S512.101