Time Course Changes of Endogenous Hormone Levels During the Floral andVegetative Buds Formation in Loquat (Eriobotrya japonica Lindl. )

ACTA HORTICULTURAE SINICA ›› 2007, Vol. 34 ›› Issue (2): 339-344.

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Time Course Changes of Endogenous Hormone Levels During the Floral andVegetative Buds Formation in Loquat (Eriobotrya japonica Lindl. )

LIU Zong-li^1,2, LIN Shun-quan^1*,and CHEN Hou-bin¹

(¹College of Horticulture, South China Agricultural University, Guangzhou 510642, China; ²College of Life Science, South China Normal University, Guangzhou 510631, China)

Received:2006-11-08 Revised:2007-03-16 Online:2007-04-25 Published:2007-04-25
Contact: LIN Shun-quan

Abstract

Abstract: The variation and the ratios of four endogenous hormones in the buds throughout flower induction and differentiation in field-grown Zaozhong 6 loquat treeswere studied. While lower levels of GA₃ and IAA were linked to the inflorescence primordium formation and floral organs differentiation, higher levels of ZT and ABA were connected with flower differentiation. Of the four endogenous hormones detected, ABA played a dominant role in flower induction and differentiation, as the persistent rise in ABA level coincided with flower bud formation. Meanwhile, the fall in IAA level at some critical point (mid-August) also appeared to be necessary.

Key words: Loquat, Flower induction, Flower differentiation, IAA, GA₃, ZT, ABA

CLC Number:

S 667.3

LIU Zong-li;LIN Shun-quan;and CHEN Hou-bin. Time Course Changes of Endogenous Hormone Levels During the Floral andVegetative Buds Formation in Loquat (Eriobotrya japonica Lindl. )[J]. ACTA HORTICULTURAE SINICA, 2007, 34(2): 339-344.

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Time Course Changes of Endogenous Hormone Levels During the Floral andVegetative Buds Formation in Loquat (Eriobotrya japonica Lindl. )

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