文献类型：期刊文献

英文题名：Contrasting Regulators of the Onset and End of the Seed Release Phenology of a Temperate Desert Shrub Nitraria tangutorum

作者：Bao, Fang[1,2,3,4] Xin, Zhiming[5] Liu, Minghu[5] Li, Jiazhu[1,2] Gao, Ying[1,2] Lu, Qi[1,2,5] Wu, Bo[1,2,3,4]

第一作者：Bao, Fang

通信作者：Bao, F[1];Wu, B[1];Bao, F[2];Wu, B[2];Bao, F[3];Wu, B[3];Bao, F[4];Wu, B[4]

机构：[1]Chinese Acad Forestry, Inst Desertificat Studies, Beijing 100091, Peoples R China;[2]Chinese Acad Forestry, Inst Ecol Conservat & Restorat, Beijing 100091, Peoples R China;[3]Chinese Acad Forestry, Key Lab Desert Ecosyst & Global Change, Beijing 100091, Peoples R China;[4]Gansu Minqin Desert Ecosyst Natl Observat Res Stn, Wuwei 733300, Peoples R China;[5]Chinese Acad Forestry, Expt Ctr Desert Forestry, Bayannaoer 015200, Peoples R China

年份：2023

卷号：12

期号：1

外文期刊名：PLANTS-BASEL

收录：;Scopus(收录号：2-s2.0-85145848997);WOS:【SCI-EXPANDED(收录号:WOS:000909381300001)】；

语种：英文

外文关键词：desert species; seed release; water addition; phenology

摘要：Seed release is crucial in the reproductive cycle of many desert plant species, but their responses to precipitation changes are still unclear. To clarify the response patterns, we conducted a long-term in situ water addition experiment with five treatments, including natural precipitation (control) plus an extra 25%, 50%, 75%, and 100% of the local mean annual precipitation (145 mm), in a temperate desert in northwestern China. Both the onset and end of the seed release phenophase of the locally dominant shrub, Nitraria tangutorum, were observed from 2012 to 2018. The results showed that both the onset and end time of seed release, especially the end time, were significantly affected by water addition treatment. On average, the end time of seed release was advanced by 3.9 d, 7.3 d, 10.8 d, and 3.8 d under +25%, +50%, +75%, and +100% water addition treatments, respectively, over the seven-year study, compared with the control. The changes in the onset time were relatively small (only several hours), and the duration of seed release was shortened by 4.0 d, 7.5 d, 10.8 d, and 2.0 d under +25%, +50%, +75%, and +100% water addition treatments, respectively. The onset and end time of seed release varied greatly between the years. Preceding fruit ripening and summer temperature jointly regulated the inter-annual variation of the onset time of seed release, while the cumulative summer precipitation played a key role in driving the inter-annual variation of the end time. The annual mean temperature controlled the inter-annual variation of the seed release duration, and these interactions were all non-linear.