浅析植物生长调节剂对选792桑叶激素的影响

Analysis of s on electoral Impact of Plant Growth Regulator on the Hormone Content in the Leaf of Mulberry Variety Xuan 792

[目的]研究植物生长调节剂对选792桑树品种在夏伐时进行处理,其叶片中激素含量的变化动态。[方法]设缩节胺200mg/L、天丰素200mg/L、清水3个处理,研究植物生长调节剂对选792桑树品种叶片中GA3、Z+ZR、IAA、ABA含量变化及影响。[结果]200mg/L天丰素在处理初期,即第3～10天,不同程度地降低了叶片中GA3、Z+ZR、IAA/ABA的比值及含量,在处理的中后期,该处理使得叶片中Z+ZR、IAA/ABA的比值及含量均有所升高;200mg/L缩节胺在处理初期,抑制了叶片中GA3的含量,但第3～10天使得GA3含量又迅速升高,同时IAA/ABA的比值也明显较其他处理有所下降,而Z+ZR含量则无明显差异。[结论]不同温度、季节、桑树生长时期等环境条件,相同桑树品种对植物生长调节剂的反应不同。

[ Objective ] The dynamic change of hormone content in the leaf of mulberry varietyXuan 792 was studied when it was treated with plant growth regulator in its cutting in summer. [ Method] The effect of the plant growth regulator on the content of GA3 , Z ＋ ZR, IAA and ABA in leaf of mulberry varietyXuan 792 was researched based on three treatments of DPC of 200 mg/L, Tianfengsu of 200 mg/L and water. [ Results] The content of GA3 and Z ＋ ZR, and the ratio of IAA/ABA in the leaf were reduced to varying degree in the treatment of 200 mg/L of Tianfengsu during the first 3rd to 10th day; in the middle period, they were raised. The treatment of DPC inhibited the increment of GA3 in early period, but the content of GA3 in leaf was rapidly raised from the 3rd to 10th, and meanwhile, the ratio of IAA/ABA was significantly decreased compared with others, but the content of Z ＋ ZR was no significant difference. [ Conclusion] The response of same mulberry variety to plant growth regulators was different under the environmental conditions of temperature, growth season, tree growth period.