| 元谋干热河谷车桑子种子休眠与萌芽的空间变异特征研究 |
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| 引用本文： | 王雪梅,闫帮国,刘刚才,方海东. 元谋干热河谷车桑子种子休眠与萌芽的空间变异特征研究[J]. 热带亚热带植物学报, 2016, 24(4): 375-380 |
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| 作者姓名： | 王雪梅 闫帮国 刘刚才 方海东 |
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| 作者单位： | 1. 中国科学院水利部成都山地灾害与环境研究所, 中国科学院山地表生过程与生态调控重点实验室, 成都 610041; 2. 中国科学院大学, 北京100049,1. 中国科学院水利部成都山地灾害与环境研究所, 中国科学院山地表生过程与生态调控重点实验室, 成都 610041; 2. 中国科学院大学, 北京100049; 3. 云南省农业科学院热区生态农业研究所, 云南 元谋 651300,中国科学院水利部成都山地灾害与环境研究所, 中国科学院山地表生过程与生态调控重点实验室, 成都 610041,云南省农业科学院热区生态农业研究所, 云南 元谋 651300 |
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| 基金项目： | 国家自然科学基金项目（41471232）资助 |
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| 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。
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| 关 键 词： | 车桑子 种子 休眠 变异 干热河谷 |
| 收稿时间： | 2015-10-09 |
| 修稿时间： | 2015-12-02 |
Spatial Variation in Seed Dormancy and Germination of Dodonaea viscose in Yuanmou Dry-hot Valley, China |
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| WANG Xue-mei,YAN Bang-guo,LIU Gang-cai and FANG Hai-dong. Spatial Variation in Seed Dormancy and Germination of Dodonaea viscose in Yuanmou Dry-hot Valley, China[J]. Journal of Tropical and Subtropical Botany, 2016, 24(4): 375-380 |
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| Authors: | WANG Xue-mei YAN Bang-guo LIU Gang-cai FANG Hai-dong |
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| Affiliation: | 1. 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; 2. University of Chinese Academy of Sciences, Beijing 100049, China,1. 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; 2. University of Chinese Academy of Sciences, Beijing 100049, China; 3. Institute of Tropical Eco-Agriculture, Yunnan Academy of Agricultural Sciences, Yuanmou 651300, Yunnan, China,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 and Institute of Tropical Eco-Agriculture, Yunnan Academy of Agricultural Sciences, Yuanmou 651300, Yunnan, China |
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| Abstract: | In order to reveal dormancy character and geographical variation of Dodonaea viscose seeds, the seeds were collected from Liangshan and Zuolin Xiang in Yuanmou Xian, Yunnan Province, and their germination character was studied. The results showed that seeds from two places had physical dormancy, and the germination rate 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 Liangshan and Zuolin. Therefore, seeds from Liangshan and Zuolin had no geographical variation, the two places are feasible to seed collection. But seed dormancy should be broken before sowing to improve germination rate. |
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| Keywords: | Dodonaea viscose Seed Dormancy Variation Dry-hot valley |
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