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Seed dormancy and germination in Vitis amurensis and its variation

Published online by Cambridge University Press:  30 August 2011

W.Q. Wang ,
S.Q. Song ,
S.H. Li ,
Y.Y. Gan ,
J.H. Wu  and
H.Y. Cheng
W.Q. Wang
Affiliation:
Group of Seed Physiology and Biotechnology, Institute of Botany, The Chinese Academy of Sciences, No. 20 Nanxincun, Xiangshan, Beijing 100093, China
S.Q. Song
Affiliation:
Group of Seed Physiology and Biotechnology, Institute of Botany, The Chinese Academy of Sciences, No. 20 Nanxincun, Xiangshan, Beijing 100093, China
S.H. Li
Affiliation:
Group of Seed Physiology and Biotechnology, Institute of Botany, The Chinese Academy of Sciences, No. 20 Nanxincun, Xiangshan, Beijing 100093, China
Y.Y. Gan
Affiliation:
Group of Seed Physiology and Biotechnology, Institute of Botany, The Chinese Academy of Sciences, No. 20 Nanxincun, Xiangshan, Beijing 100093, China
J.H. Wu
Affiliation:
Group of Seed Physiology and Biotechnology, Institute of Botany, The Chinese Academy of Sciences, No. 20 Nanxincun, Xiangshan, Beijing 100093, China
H.Y. Cheng*
Affiliation:
Group of Seed Physiology and Biotechnology, Institute of Botany, The Chinese Academy of Sciences, No. 20 Nanxincun, Xiangshan, Beijing 100093, China
*
*Correspondence Fax: +86 10 62590835 Email: [email protected]
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Abstract

There is little information about seed dormancy release and germination behaviour in Vitis amurensis, which is one of the most important wild Vitis species. This work aimed to investigate the dormancy release and germination characteristics and their variation in V. amurensis seed. Seed dormancy was released by: (1) stratification at 5, 10, 15, 20, 25 and 15/5°C, respectively; (2) stratification at 25°C followed by stratification at 5°C; (3) 5°C stratification before or after seed drying; and (4) stratification at a series of relative humidities (RHs) at 5 and 25°C. The freshly harvested and dormancy-released seeds were germinated at three fluctuating and four constant temperatures. In V. amurensis: (1) dormancy release could occur at temperature ≤ 25°C, but was maximal at 5°C for all varieties; (2) dormancy release and induction occurred simultaneously during stratification; (3) the rates of dormancy release and induction were dependent on temperature; (4) seed moisture content affected dormancy release with a temperature-dependent pattern; (5) seeds germinated better at fluctuating temperature than at constant temperature. However, the optimum condition for stratification and germination, the rates of dormancy release and induction, and the response of seeds to warm stratification, to drying and to germination temperature varied significantly among the V. amurensis varieties. Our data imply that seed dormancy and germination in V. amurensis not only have intra-species similarity, but also vary within species, which may be due to differences in environmental conditions at the original growth and cultivated sites.

Keywords

dormancy release and inductionfluctuating temperaturegerminationgrapevarietyVitis amurensis
Type
Research Article
Information
Seed Science Research , Volume 21 , Issue 4 , December 2011 , pp. 255 - 265
Copyright
Copyright © Cambridge University Press 2011

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