萌动种子低温处理对萝卜花芽分化及植株生长的影响  

Effects of low temperature pretreatment of germinated seeds on floral bud differentiation and plant growth in radish (Raphanus sativus L)

作　　者：汪炳良[1] 邓俭英[1] 曾广文[2] 

机构地区：[1]浙江大学园艺系,浙江杭州310029 [2]浙江大学生物科学系,浙江杭州310029

出　　处：《浙江大学学报（农业与生命科学版）》2003年第5期504-508,共5页Journal of Zhejiang University:Agriculture and Life Sciences

基　　金：浙江省自然科学基金资助项目(300266).

摘　　要：以冬性品种‘一点红’和春性品种‘短叶13’为材料,取其萌动种子在5℃和10℃条件下分别处理10～40 d,研究低温对萝卜花芽分化和植株生长的影响.结果表明,低温处理明显促进了萝卜花芽分化和现蕾、抽薹及开花,处理温度越低、时间越长,这种促进作用越明显.‘短叶13’品种在5～10℃下只要处理10 d,就能明显促进花芽分化;‘一点红’则需要在5～10℃下处理20 d以上.另一方面,低温处理也明显抑制了植株的生长,低温处理时间越长,对株高、叶片数和叶片大小的抑制作用越明显.In order to study the effects of low temperature treatment on the floral differentiation and plant growth, germinated radish (Rapkanus sativus L. ) seeds of the winter variety 'Yi-Dian-Hong' and the spring variety 'Duan-Ye 13' were subjected to 5 ℃ or 10℃ for 10 to 40 days, the control seedlings of both cultivars were germinated at 25 ℃ and didn't subject to low temperature. After low temperature treatment, all seedlings, including the control, were transplanted into glasshouse with a warm (>15 ℃) and long photoperiod (16 h) growth condition. It was found that floral bud differentiation of both radish varieties were promoted by low temperature pretreatment. The promoting effects were better when the germinated seeds were subjected to lower temperature and/or for longer treatment duration. Only 10-day pretreatment of germinated seeds at 5 ℃or 10 ℃ was enough to enhance the floral bud differentiation in the spring variety 'Duan-Ye 13', whereas at least 20-day pretreatment was required for the promotion of floral bud differentiation in the winter variety 'Yi-Dian-Hong'. On the other hand, low temperature pretreatment of germinated seeds inhibited the plant growth, including plant height, number of leaves as well as leaf length and width. The longer the treatment duration was, the stronger the inhibitions were.

关 键 词：萝卜 花芽分化 植株生长 萌动种子 低温处理 

分 类 号：S631.1[农业科学—蔬菜学]