African Journal of
Biotechnology

  • Abbreviation: Afr. J. Biotechnol.
  • Language: English
  • ISSN: 1684-5315
  • DOI: 10.5897/AJB
  • Start Year: 2002
  • Published Articles: 12482

Short Communication

Changes in endogenous hormone contents of pear stock (Pyrus betulaefolia Bge. and Pyrus calleryana Dcne.) seeds during cold stratification

Jianping Bao1 and Shaoling Zhang2*
1Team for Horticultural Plant Genetic Improvement, College of Plant Science，Tarim University, Alar Xinjiang 843300, China. 2College of Horticulture, Nanjing Agricultural University, Nanjing, 210095 China.    
Email: [email protected]

  •  Accepted: 12 October 2011
  •  Published: 23 November 2011

Abstract

In this study, changes in endogenous hormone contents of pear stock seeds during cold stratification were investigated. Abscisic acid (ABA) content decreased with increase in the periods of stratification of pear stock seeds. However, gibberellic acid (GA) and indole-3-acetic acid (IAA) contents of Pyrus betulaefolia and Pyrus calleryana gradually increased and then decreased, and the GA and IAA contents ofP. betulaefolia and P. calleryana seeds reached maximum level at 40 and 50 days, respectively. The results suggest that ABA and GA had regulatory roles in dormancy release, but IAA seems to be involved in the germination process.

 

Key words: Pear stock seed, cold stratification, hormone.

Abbreviation

ABA, Abscisic acid; GA, gibberellic acid; IAA, indole-3-acetic acid.

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This article is published under the terms of the Creative Commons Attribution License 4.0

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