氮、锌营养与青花菜花球发育过程中核酸及钙调素的关系

园艺学报 ›› 2001, Vol. 28 ›› Issue (4): 312-316.

氮、锌营养与青花菜花球发育过程中核酸及钙调素的关系

杨暹；李德明^*

(华南农业大学园艺系, 广州510642)

收稿日期:1900-01-01 修回日期:1900-01-01 出版日期:2001-08-25 发布日期:2001-08-25

The Effects of Nitrogen and Zinc Nutrition on Nucleic Acid and Calmodulin during the Growth and Development of Curd in Broccoli ( Brassica oleracea L. var. italica Planch)

Yang Xian and Li Deming

(Department of Horticulture , South China Agricultural University , Guangzhou 510642)

Received:1900-01-01 Revised:1900-01-01 Online:2001-08-25 Published:2001-08-25

摘要/Abstract

摘要： 青花菜生长发育过程茎端DNA、RNA、总核酸( TNA) 含量在花序分化前逐渐上升, 分化时达到高峰, 分化后一度下降, 分化1 周时开始回升, 至花球膨大期达到小高峰,花球膨大后期逐渐下降。RNA/ DNA 比值于花序分化前急剧下降, 分化后进一步下降, 现蕾后花球发育膨大期间逐渐回升。茎端钙调素( CaM) 含量在花序分化前逐渐上升, 分化1 周时达到高峰, 花球发育和膨大过程中逐渐下降。氮( N) 、锌( Zn) 营养可促进核酸和CaM 的代谢, 但不同N、Zn 营养组合使核酸合成活力有所不同, 适宜的N 以及增施Zn 对CaM 的合成有显著促进作用。

关键词: 青花菜, 核酸, 钙调素( CaM), 花序分化, 氮锌营养

Abstract: The content of DNA, RNA and total nucleic acid ( TNA) in stem apex increased
gradually before the inflorescence differentiation, and reached a peak at the inflorescence differentiation, then decreased to a proper level at one week after the inflorescence differentiation and increased again to form little peak at the former stage of curd formation, then decreased again at the late stage of curd formation. The RNA/ DNA rat io went down rapidly just before the emergence of curd, and went up gradually from the emergence to harvest of curd. The content of Calmodulin ( CaM) in stem apex went up gradually before the inflorescence differentiation and reached a peak after one week of the in florescence differentiation, then went down during curd format ion. N-Zn nutrition could promote the metabolism of nucleic acid and CaM, but different N-Zn nutrition had different effects on the synthetic activity of nucleic acid. Suitable N and Zn nutrit ion had a marked promoting effect on the synthesis of CaM.

Key words: Broccoli ( Brassica olerecea L. var. italica Planch), Nucleic acid, Calmodulin( CaM), Inflorescence differentiation, N-Zn nutrition

中图分类号:

杨暹;李德明. 氮、锌营养与青花菜花球发育过程中核酸及钙调素的关系[J]. 园艺学报, 2001, 28(4): 312-316.

Yang Xian and Li Deming. The Effects of Nitrogen and Zinc Nutrition on Nucleic Acid and Calmodulin during the Growth and Development of Curd in Broccoli ( Brassica oleracea L. var. italica Planch)[J]. ACTA HORTICULTURAE SINICA, 2001, 28(4): 312-316.

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