摘要
观察了云南蓝果树(Nyssa yunnanensis)种子的形态,并初步研究了萌发基质、光照、人工破坏内果皮和pH梯度碱液处理对云南蓝果树种子萌发的影响。结果表明:云南蓝果树种子(带内果皮)平均大小为0.94cm×0.52cm×0.17cm(长×宽×厚),千粒重约234.3g,有萌发瓣;红土/腐殖土/泥炭土(v/v/v,1∶1∶1)为云南蓝果树种子萌发的适宜基质;种子在光、暗条件下都能萌发;人工破坏内果皮能明显地提高种子的萌发率;碱液处理对云南蓝果树种子的萌发有抑制作用,但对中国蓝果树(N.sinensis)种子的萌发有促进作用。本文还对云南蓝果树的致濒原因进行了讨论。
Seed morphology was observed and effects of substance types, light, destroying the endocarp artifieially and gradient pH on germination percentage of the species, N. yunnanensis, were investigated. The results showed that the average seed size with endocarp was 0.94 cm×0.52 cm×0.17 cm （length×width×thickness ）, per-thousand-seed-weight about 234.3 g, with germination valve. Among the three substance types, laterite/humus soil/peat （v/v/v, 1 ： 1：1） was better for N. yunnanensis. Seeds could germinate in the both light and dark, the germination rate can be increased by destroying the endocarp artificially obviously, and the seed germination of N. yunnanensis was stunted by treated in lye, however, that of N. sinensis was promoted. Besides, the rarity causes of N. yunnanensis were discussed in this paper.
出处
《云南植物研究》
CSCD
北大核心
2007年第3期351-354,共4页
Acta Botanica Yunnanica
基金
国家科技部基础条件平台建设子项目(2005DKA21006)
国家科技部基础工作专项重点项目(2001DEA10009)
中国科学院知识创新工程试点资助项目(KSCX-2-SW-112)
关键词
云南蓝果树
极度濒危
种子形态
种子萌发
致濒原因
Nyssa yunnanensis
Critically endangered
Seed morphology
Seed germination
Causes of rarity
