药物植物桃儿七不同种群种子产量初步研究

摘要/Abstract

摘要： 对药用植物桃儿七5个不同种群种子产量的研究表明:各种群中每花平均胚珠数、每果实平均种子数及种群平均结实率与种群所在的海拔高度呈正相关;不同种群个体平均胚珠数的变异范围为58.97～87.97,平均种子数变异范围为40.02～80.58,平均结籽率变异范围为61.29%～91.60%;果实内单粒种子平均干重与种群分布海拔呈明显负相关,与果实内种子数呈弱负相关;同一种群在不同年份间平均种子产量差异不大;种子产量除主要受个体营养状况影响外,还受海拔及其它因素的影响;果实内种子数与果实大小及重量呈正相关,但单粒种子平均重量与果实大小及果实内种子总重量无显著相关.

关键词: 桃儿七, 种群, 种子产量, 结籽率, 黄瓜, 硝铵比, 氮代谢, 氮吸收

Abstract: The study on the seed production of five Sinopodophyllum hexandrum(Berberidaceae) populations demonstrated that the average ovule number,average seed number and seed set ratio of these populations were varied,but all positively related with the altitude of the population.The average ovule number of a flower ranged from 58.79 to 87.97,average seed number of a fruit ranged from 40.02 to 80.58,and average seed set ratio of population ranged from 61.29% to 91.60%.The average weight per seed in a fruit was negatively related with the altitude and seed number in the fruit.The result also showed that seed production of a population had no obvious difference in different years.Although seed production was mainly influenced by nutrition condition of the individual,it was still influenced by altitude and other factors.Seed number in a fruit was positively related with fruit size(including weight,length and width)and total seed weight of the fruit,but average single seed weight of a fruit had no obvious relation with fruit size and total seed weight of the fruit.

Key words: Sinopodophyllum hexandrum, Population, Seed production, Seed set ratio, nitrogen absorption, cucumber, NO₃^--N/NH₄⁺-N ratio, nitrogen metabolism.

中图分类号:

Q944.33

马绍宾, 姜汉侨, 黄衡宇. 药物植物桃儿七不同种群种子产量初步研究[J]. 应用生态学报, 2001, 12(3): 363-368.

MA Shaobin, JIANG Hanqiao, HUANG Hengyue. A primary study on seed production of medicinal plant Sinopodophyllum hexandrum[J]. Chinese Journal of Applied Ecology, 2001, 12(3): 363-368.

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