文献类型：期刊文献

英文题名：Geographic variations in seed germination of Dalbergia odorifera T. Chen in response to temperature

作者：Liu, Xiaojin[1] Xu, Daping[1] Yang, Zengjiang[1] Zhang, Ningnan[1]

第一作者：刘小金

通信作者：Xu, DP[1]

机构：[1]Chinese Acad Forestry, Res Inst Trop Forestry, Guangzhou 510520, Guangdong, Peoples R China

年份：2017

卷号：102

起止页码：45-50

外文期刊名：INDUSTRIAL CROPS AND PRODUCTS

收录：;WOS:【SCI-EXPANDED(收录号:WOS:000401380600006)】；

基金：This study was sponsored by the National Key Research and Development Program of China (Grant No. 2016YFD0600601) and the Fundamental Research Funds for the Central Non-profit Research Institution of Research Institute of Tropical Forestry, Chinese Academy of Forestry (Grant No. RITFYWZX201407), a Technology Innovation Special Program from Forest Department of Guangdong Province (Grant No. 2013KJCX004-01, 2016KJCX009) was also acknowledged for this research. Thanks to Prof. Khongsak Pinyopusarerk and Prof. Jie Zeng for comments on the manuscript.

语种：英文

外文关键词：Temperature response; Geographic variation; Seed germination; Dalbergia odorifera

摘要：Temperature plays an essential role in regulating seed germination and seedling production. As adaptation of germination requirements can occur in response to slight differences of the local climate, studying the intra-species variations of seed germination is of great importance for its large-scale conservation, introduction and seedling production. In the present study, germination of Dalbergia odorifera from four geographic sites (namely Ledong in Hainan province, Pingxiang in Guangxi Zhuang Autonomous region, Zhaoqing in Guangdong province and Longhai in Fujian province) were investigated under five constant temperatures (15 degrees C, 20 degrees C, 25 degrees C, 30 degrees C and 35 degrees C). The results showed that there existed statistically significant differences (P< 0.001) among these localities, temperatures and their interactions in terms of final germination percentage (FGP) and mean time to germination (MTG). Seeds from all these localities demonstrated the lowest FGP value (27.3%, 0.0%, 8.0% and 10.0% in average) under the temperature of 15 degrees C, while 25 degrees C was the optimal germination temperature for seeds collected from Ledong and Pingxiang, and 30 degrees C for seeds collected from Zhaoqing and Longhai. It could be deduced that infra-specific variations in the optimal germination temperature might occur over a small scale in southern China. (C) 2017 Elsevier B.V. All rights reserved.