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  Eur.J.Hortic.Sci. 81 (1) 22-26 | DOI: 10.17660/eJHS.2016/81.1.3
ISSN 1611-4426 print and 1611-4434 online | © ISHS 2016 | European Journal of Horticultural Science | Original article

Effects of low temperature and chilling duration on bud break and changes of endogenous hormones of asparagus

L.C. Nie, Y.H. Chen and M. Liu
College of Horticulture, Agricultural University of Hebei, Baoding, China

SUMMARY
The aim of this study was to investigate the dormancy characteristics of Asparagus officinalis Linn. ‘Applo’ in temperate climates. Contents of endogenous hormones in bud were examined by Enzyme-Linked Immunosorbent Assay (ELISA). The result showed that asparagus plants underwent dormancy induced by low temperature, need a chilling duration to restore vigor for bud break and spear growth. In northern China, 2°C for 30 days or 5°C for 45 days was the suitable chilling duration for ‘Applo’ dormancy breaking. During winter time or chilling preservation, content of gibberellic acid (GA3), indoleacetic acid (IAA) and zeatin riboside (ZR) in buds of ‘Applo’ remained relatively stable, while abscisic acid (ABA) content rose and went down, which indicated that change of ABA was closely related to the dormancy and dormancy-breaking of asparagus.

Keywords abscisic acid, Asparagus officinalis Linn. ‘Applo’, dormancy breaking, ELISA, hormones content

Significance of this study

What is already known on this subject?

  • Asparagus undergo a period of dormancy in wintertime of northern China. Moreover, chilling temperature and chilling duration affect asparagus dormancy breaking for some cultivars. Endogenous hormones play an important role in plant dormancy and dormancy release.
What are the new findings?
  • 2°C for 30 days or 5°C for 45 days was the suitable chilling condition for ‘Applo’ dormancy breaking in northern China. Content of gibberellic acid (GA3), indoleacetic acid (IAA) and zeatin riboside (ZR) in buds of ‘Applo’ remained relatively stable, while abscisic acid (ABA) content varied during dormancy.
What is the expected impact on horticulture?
  • Better understanding of dormancy characteristics makes asparagus protected cultivation in winter possible, to meet the growing market need. Endogenous hormones changes during dormancy and dormancy breaking of asparagus ‘Applo’ was clarified in this study.

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E-mail: yynlc@hebau.edu.cn  

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Received: 12 November 2014 | Revised: 13 March 2015 | Accepted: 17 November 2015 | Published: 22 February 2016 | Available online: 22 February 2016

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