摘要
为明确车桑子[Dodonaea viscosa(L.)Jacq.]种子的休眠特性和地理变异特性,测定了云南省元谋县凉山乡(属北亚热带区)和坝区苴林乡(属南亚热带区)车桑子种子形态,观察了种子的休眠特性和萌发特性。结果表明,两地的车桑子种子都具有物理休眠特性,经热水处理的种子萌发率显著高于未处理的种子(P=0.001)。两地种子在长、宽、长/宽以及种子百粒重上十分接近,其萌发特征和幼苗生长特征没有表现出显著差异。因此,坝区苴林乡和凉山乡种子并未发生地理变异,两地均适合车桑子采种,但在播种前应进行种子休眠破除,以提高种子发芽率。
In order to reveal dormancy character and geographical variation of Dodonaea viscose seeds, the seedswere collected from Liangshan and Zuolin Xiang in Yuanmou Xian, Yunnan Province, and their germinationcharacter was studied. The results showed that seeds from two places had physical dormancy, and the germinationrate of seeds treated by hot water was significantly (P=0.001) higher than that of untreated seeds. The width,length of seed, ratio of length to width, and 100-seed weight between Liangshan and Zuolin were very close.Besides, the seed germination and seedling growth of D. viscose had no significant differences between Liangshanand Zuolin. Therefore, seeds from Liangshan and Zuolin had no geographical variation, the two places are feasibleto seed collection. But seed dormancy should be broken before sowing to improve germination rate.
作者
王雪梅
闫帮国
刘刚才
方海东
WANG Xue-mei;YAN Bang-guo;LIU Gang-cai;FANG Hai-dong(Key Laboratory of Mountain Surface Processes and Ecological Regulation, Chinese Academy of Sciences, Institute of Mountain Hazards and Environment,Chinese Academy of Sciences and Ministry of Water Conservancy, Chengdu 610041, China;University of Chinese Academy of Sciences, Beijing 100049,China;Institute of Tropical Eco-Agriculture, Yunnan Academy of Agricultural Sciences, Yuanmou 651300, Yunnan, China)
出处
《热带亚热带植物学报》
CAS
CSCD
北大核心
2016年第4期375-380,共6页
Journal of Tropical and Subtropical Botany
基金
国家自然科学基金项目(41471232)资助~~
关键词
车桑子
种子
休眠
变异
干热河谷
Dodonaea viscose
Seed
Dormancy
Variation
Dry-hot valley
