J Integr Plant Biol. ›› 2010, Vol. 52 ›› Issue (3): 324-331.DOI: 10.1111/j.1744-7909.2010.00916.x

• Plant-environmental Interactions • Previous Articles     Next Articles

Optimizing Seed Water Content: Relevance to Storage Stability and Molecular Mobility

Ming Zhang, Jia-Jin Zhuo, Xu Wang, Sen Wu and Xiao-Feng Wang*   

  1. Key Laboratory for Genetics and Breeding in Forest Trees and Ornamental Plants, Ministry of Education, Beijing Forestry University, Beijing 100083, China
    *Author for correspondence
    Tel: +86 10 6233 6114; Fax: +86 10 6233 7855; E-mail: wxf801@sina.com
  • Received:2009-10-20 Accepted:2009-11-27 Published:2010-03-01

Abstract:

This research was conducted to determine the optimum moisture content (MC) that gave maximum longevity to seeds. Three species were used to represent seeds with different dry matter reserves, which gives them different sorption properties: maize (Zea mays L.), elm (Ulmus pumila L.) and safflower (Carthamus tinctorius L.). The seeds of elm, safflower, and maize embryos with MC ranging from 0.00–0.15 g H2O/g dry weight (DW) were stored at 35 ℃ for different periods of time. The results showed that the optimum MC for seed and embryo storage varied between species (0.057 g H2O/g DW for maize embryos, 0.045 g H2O/g DW for elm, and 0.02 g H2O/g DW for safflower). Drying below this optimum MC increased the aging rate and there were detrimental effects of drying. The relative humidity corresponding to optimum MC in embryos of maize, elms and safflower was about 15%, 12% and 7% respectively, according to the lipid composition of the embryos. The data provided confirmatory evidence that molecular mobility (△Azz) in elms, maize and safflower embryos was compatible with the optimum moisture content.

Zhang M, Zhuo JJ, Wang X, Wu S, Wang XF (2010) Optimizing seed water content: relevance to storage stability and molecular mobility. J. Integr.Plant Biol. 52(3), 324–331.

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