摘要
在葡萄深休眠期后,15%和20%的石灰氮处理能有效地降低葡萄枝条中下部芽的ABA的含量,提高GA与IAA的含量.18%NH4NO3处理对枝条下部芽的IAA含量提高作用不显著,但显著降低ABA含量,提高GA含量.15%和20%的石灰氮及18%NH4NO3处理后都能促进淀粉降解,使枝条中下部芽积累高浓度的可溶性糖,有利于中下部芽的萌发,并使芽提早萌发7d左右.100和150mg/LGA3处理枝条各部分芽的ABA含量显著下降,GA、IAA的含量显著提高,且上中部芽的内源激素变化比下部芽更显著,上中部芽的淀粉含量显著低于下部芽,可溶性糖含量显著高于下部芽,最终导致芽的萌发不整齐.
Treatment in which 15% or 20% lime nitrogen was smeared onto buds of grapevine when their deep dormancy was over significantly decreased ABA content of buds at the middle and lower portion of the shoots but increased GA and IAA content. Treatment with 18% NH4NO3 slightly increased IAA and GA content of the lower buds, whereas remarkably decreased ABA content. The degradation of starch in the middle and lower buds was enhanced by the above treatments, thus resulting in relatively high concentration of soluble sugar in these buds. The accumulation of soluble sugar was thought to be beneficial to germination of buds so that bud-break occurred 7 days earlier than that of control. Treating of the vines with 100 and 150 mg/L GA3 were effective for significant decrease in ABA content but substantially increased GA and IAA content. It was noted that the amount of endogenous hormones in the middle to upper par buds changed more obviously than in the lower part buds. The relatively low starch content and high soluble sugar content of the supper and middle part buds as compared to the lower part buds were considered to the cause of uneven bud bursting along the shoots.
出处
《浙江大学学报（农业与生命科学版）》
CAS
CSCD
北大核心
2004年第2期197-201,共5页
Journal of Zhejiang University:Agriculture and Life Sciences
基金
宁波市农经委科研项目(200012)
宁波市重点实验室科研项目(9941004).
