风箱果有性繁殖研究  

Sexual reproduction of Physocarpus amurensis

作　　者：魏晓慧[1] 殷东生[1] 张丽杰[1] 冯丹丹[1] 沈海龙[1] 

机构地区：[1]东北林业大学林学院,哈尔滨150040

出　　处：《植物研究》2006年第3期380-384,共5页Bulletin of Botanical Research

基　　金：黑龙江省科技攻关项目(GB02B103)资助

摘　　要：对风箱果(Physocarpus amurensis)适宜的采种时期、不同母树种子的成熟差异和幼苗的生长特征进行了研究。结果表明,风箱果种子的最适采种期在7月末,种子成熟后有休眠特性;方差分析表明,不同植株间种子的发芽率和千粒重都达到极显著水平(p<0.01),并且发芽率与种子重量呈正相关,其相关程度最佳的为幂函数,确定系数是75.75%(p<0.01);风箱果幼苗类型为子叶出土型,幼苗生物量对根的投资最大,其次是叶,茎的最少,在这3部分生物量投资中,对根和叶的投资比较稳定(其变异系数分别为6.8%和11.03%),对茎的生物量投资具有较大的变异(其变异系数为21.81%)。基径是衡量风箱果幼苗空间大小的重要数量指标。风箱果构件生物量(根生物量、茎生物量、叶生物量及总生物量)各组分均随基径的增加,呈线性函数形式增长,这表明随着植株的空间扩展,各构件有着相同的物质生产与积累规律。The optimum seed collecting time, the difference of seed maturity of different mother trees and growth characteristic of seedlings of Physocarpus amurensis was studied. The results showed that the optimum collecting time of seed was the end of July, and dormancy after seed mature,The statistical re- suits showed that the germination percentage and the lO00-kernal weight were highly significant difference （p 〈0. 01 ）, and the germination percentage were increase by power function with the size of the 1000-seed weight, and coefficient was 75.75% （p 〈0. 1 ）. The seedling biomass investment to roots was highest, stems was smallest and leaves was midst; biomass investment to roots and leaves（variance coefficient were 6. 8%, 11.03%, respectively） was more steady than that to stems （variance coefficient was 21.81%, respectively）. The diameter of the tufts was the important quantitative index to measure the special size of P. amurensis seedlings. The total biomass and the biomass of the roots, stems and leaves were all increased by linear function with the size of tuft diameters, and the correlation were all significant.

关 键 词：风箱果 有性繁殖 采种期 种子萌发 幼苗生长 

分 类 号：S864.3[农业科学—野生动物驯养] TS953.35[农业科学—畜牧兽医]