Changes of Endogenous Hormones in Adventitious Root Forma tion in Soft-wood Cuttings of Autotetraplo id Grape Muscat Hamburg

ACTA HORTICULTURAE SINICA ›› 2009, Vol. 36 ›› Issue (4): 565-570.

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Changes of Endogenous Hormones in Adventitious Root Forma tion in Soft-wood Cuttings of Autotetraplo id Grape Muscat Hamburg

QI Yong-shun^1,2,ZHANG Zhi-hua^1*,WANG Tong-kun²,DU Guo-qiang¹,and ZHANG Jing-zheng²

(¹Departm ent of Horticulture, Agricultural University of Hebei, B aoding, Hebei 071001, China; ²Departm ent of Horticulture & Landscape A rchitecture, Hebei N orm al University of Science & Technology, Changli, Hebei 066600, China)

Received:2008-11-21 Revised:2009-03-02 Online:2009-04-25 Published:2009-04-25
Contact: ZHANG Zhi-hua

Abstract

Abstract: The changes of endogenous hormones in adventitious root formation in softwood cuttings of autotetrap loid grapeMuscat Hamburgwere studied. The results showed that endogenous hormones levels of cortex in rooting portionswere not only changed, but also the response to exogenous NAA was changed after Muscat Hamburg was doubled. It showed as follows: In adventitious root induction period (0-3 d) , the auxin levels
which can p romote rootingwere decreased, the abscisic acid and gibberellin which can inhibit rootingwere increased, then the ratio of auxin / abscisic acid and gibberellin decreased. In root p rimary period, a rising of the content of gibberellin, zeatin and zeatin riboside instead of decreasing after exogenous auxin applied. The overall change of endogenous hormones was changed. In conclusion, it was one of the main reasons for the decreased rooting ability of softwood cuttings of grapeMuscat Hamburg that homologous doubling changed the metabolism of endogenous hormones in rooting portions.

Key words: grape, autotetraploid, softwood cuttings, endogenous hormone, adventitious root

CLC Number:

S 663.1

QI Yong-shun;ZHANG Zhi-hua;WANG Tong-kun;DU Guo-qiang;and ZHANG Jing-zheng. Changes of Endogenous Hormones in Adventitious Root Forma tion in Soft-wood Cuttings of Autotetraplo id Grape Muscat Hamburg[J]. ACTA HORTICULTURAE SINICA, 2009, 36(4): 565-570.

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Changes of Endogenous Hormones in Adventitious Root Forma tion in Soft-wood Cuttings of Autotetraplo id Grape Muscat Hamburg

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