In vitro Germination and Seedling Development of Taxus chinensis var. mairei by Embryo Culture
Publish Year: 1393
نوع سند: مقاله ژورنالی
زبان: English
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شناسه ملی سند علمی:
JR_JASTMO-16-6_014
تاریخ نمایه سازی: 1 آذر 1402
Abstract:
Taxus chinensis var. mairei is a rare and endangered medicinal plant species distributed in China. In order to promote fast propagation and preserve the natural resources, conditions for in vitro germination and seedling development of embryos of T. chinensis var. mairei from Anhui or Zhejiang were investigated. Results showed that in vitro germination rate of excised embryos cultured under ۱۴ hours photoperiod was higher than that in darkness. But, nearly all embryos germinated under ۱۴ hours photoperiod failed to develop into seedlings. Comparatively, ۲۳.۳ and ۳۶.۳% of embryos from Anhui and Zhejiang, respectively, which germinated in darkness, developed into full seedlings. Addition of plant growth regulators [gibberellic acid(GA۳), indole-۳-acetic acid (IAA), ۶-benzylaminopurine (BA)] and organic additives (casein hydrolysate and yeast extract) in mediums promoted germination and seedling development. (Woody plant medium) WPM medium supplemented with ۰.۵ mg L-۱ GA۳, ۰.۵ mg L-۱ IAA, ۰.۵ mg L-۱ BA and ۱ g L-۱ activated charcoal was optimal for the culture of embryos from Anhui, while WPM medium supplemented with ۰.۵ mg L-۱ GA۳, ۵۰۰ mg L-۱ casein hydrolysate and ۱ g L-۱ activated charcoal was optimum for embryos from Zhejiang. Moreover, the germination and seedling survival rate of embryos of T. chinensis var. mairei decreased with increasing maturity of the seeds. In conclusion, darkness during germination is necessary for subsequent seedling development and immature seeds are optimal for embryo culture of this species.
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Authors
L. L. Song
School of Ecological Technology and Engineering, Shanghai Institute of Technology, Shanghai ۲۰۱۴۱۸, P.R.China
H. N. Zhang
School of Ecological Technology and Engineering, Shanghai Institute of Technology, Shanghai ۲۰۱۴۱۸, P.R.China
H. Q. Zhao
School of Ecological Technology and Engineering, Shanghai Institute of Technology, Shanghai ۲۰۱۴۱۸, People Republic of China.
Y. L. Jiang
State-owned Miaoshou Forest Farm, Jingde, Anhui ۲۴۲۶۰۴, P.R.China
M. F. Hou
School of Ecological Technology and Engineering, Shanghai Institute of Technology, Shanghai ۲۰۱۴۱۸, P.R.China
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