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园艺学报 ›› 2012, Vol. 39 ›› Issue (3): 539-544.

• 研究报告 • 上一篇    下一篇

喷施GA3和2,4-D对留树保鲜脐橙落果和内源激素含量的影响

王  雄,陈金印*,刘善军   

  1. 江西农业大学果蔬保鲜与无损检测重点实验室,南昌 330045
  • 收稿日期:2011-12-30 修回日期:2012-02-21 出版日期:2012-03-25 发布日期:2012-03-25
  • 通讯作者: 陈金印 E-mail:jinyinchen@126.com

Effect of Spraying GA3 and 2,4-D on Fruit Drop and Endogenous Hormone Content of Navel Orange

WANG Xiong,CHEN Jin-yin*,and LIU Shan-jun   

  1. Key Laboratory of Fresh Fruits and Nondestructive Tests,Jiangxi Agricultural University,Nanchang 330045,China
  • Received:2011-12-30 Revised:2012-02-21 Online:2012-03-25 Published:2012-03-25
  • Contact: CHEN Jin-yin E-mail:jinyinchen@126.com

摘要: 以纽荷尔脐橙(Newhall Navel Orange)为试材,测定喷施GA3和2,4-D的植株留树保鲜果实的落果率和果实内源赤霉素(GA)、生长素(IAA)、玉米素核苷(ZR)、脱落酸(ABA)含量的变化,探讨内源激素与留树保鲜脐橙落果的关系。结果表明:植物生长调节剂处理能降低果实内源GA、IAA、ZR含量下降的速度,减缓内源ABA及ABA/(GA + IAA + ZR)的升高,减少留树保鲜过程中的落果,其中以20 mg · L-1 GA3 + 20 mg · L-1 2,4-D混合处理的效果最好,且留树保鲜应以60 d左右为宜。初步分析认为内源GA、IAA、ZR含量的下降,内源ABA及ABA/(GA + IAA + ZR)的升高加速了果实离层的产生,共同促进了留树保鲜脐橙果实的衰老脱落。

关键词: 脐橙, 植物生长调节剂, 留树保鲜, 内源激素, 落果率

Abstract: To observe the relationship between endogenous hormone and fruit drop of Newhall Navel Orange,the changes of gibberellin(GA),auxin(IAA),zeatin riboside(ZR)and abscisic acid(ABA)contents in navel oranges were assayed after spraying GA3 and 2,4-D during on-tree storage. The results showed that plant regulators could effectively reduce the fruits abscission through decreasing the GA,IAA and ZR contents and increasing ABA and the ratio of ABA to total contents of GA,IAA and ZR. And the most effective treatment was achieved when a mixture of 20 mg · L-1 GA3 and 20 mg · L-1 2,4-D was applied. The fruits were able to remain of good quality after 60 days,on-tree preservation. The results indicated that a combination of descending endogenous GA,IAA,ZR and decreasing ABA and ratio of ABA to total contents of GA,IAA and ZR accelerated the production of the apolexis,thus delayed the ripening and dropping of navel orange during on-tree storage.

Key words: navel orange, plant growth regulator, on-tree storage, endogenous hormone, fruit dropping