Cold pretreatment enhances microspore embryogenesis in oilseed rape (Brassica napus L.) |
| |
Authors: | HH Gu P Hagberg WJ Zhou |
| |
Institution: | (1) Institute of Crop Science, College of Agriculture and Biotechnology, Zhejiang University, Hangzhou, 310029, China;(2) Institute of Crop Science, Zhejiang Academy of Agricultural Sciences, Hangzhou, 310021, China;(3) SW Laboratory, Svalöf Weibull AB, SE-26881 Svalöv, Sweden |
| |
Abstract: | Stress is an essential component during embryogenesis induction in microspore culture. Cold pretreatment has been used in cereal microspore culture but very seldom attempted in Brassica microspore culture. The effect of cold pretreatment of flower buds subjected to a liquid medium on microspore embryogenesis was investigated in spring and winter Brassica napus, as well as in B. rapa and B. oleracea. Cold pretreatment significantly enhanced microspore embryogenesis (by 1–7 fold) compared to commonly used microspore culture protocol in B. napus, while it was less effective in B. rapa or even negative in B. oleracea. The appropriate duration of cold pretreatment was found to be 2–4 days, which stimulated the best microspore embryogenesis. Cold pretreatment was also able to promote embryo development including the improvement of embryo quality and acceleration of embryogenesis. When incorporating with medium refreshing, cold pretreatment could initiate the most microspore embryogenesis than any other treatment used. With further improvement cold pretreatment method may have a positive potential in Brassica breeding programmes. |
| |
Keywords: | Brassica napus B oleracea B rapa Cold pretreatment Embryogenesis Microspore culture |
本文献已被 SpringerLink 等数据库收录! |
|