干旱区生态环境知识资源中心(Arid): Response of seed germination and seedling emergence of Haloxylon ammodendron to rain frequency and temperature change from four desert ecosystems, Northwest China

Arid

DOI	10.1093/aobpla/plac048
	Response of seed germination and seedling emergence of Haloxylon ammodendron to rain frequency and temperature change from four desert ecosystems, Northwest China
	Zhu, Yajuan; Jia, Zhiqing; Wang, Guoje; Ning, Husen; Ji, Xiaomin; Luo, Qinghong
通讯作者	Zhu, YJ
来源期刊	AOB PLANTS
ISSN	2041-2851
出版年	2023
卷号	15 期号:2
英文摘要	In the deserts of Central Asia and Northwest China, Haloxylon ammodendron(saxual) is a dominant shrub. We collected seed from four deserts in Northwest China and tested their germination in a greenhouse and incubator. We found that these seeds germinated better when they were irrigated once every 3 days with 50 mm monthly rain. They germinated well in temperatures similar to the spring and early summer, but would be inhibited by higher temperatures in the summer (30 degrees C or 30/15 degrees C). Therefore, its regeneration would be restricted by lower rain frequency and higher temperatures under future climate change. Climate change will result in variation of rain frequency and amount and warming in arid zones, which is expected to affect seed germination and seedling emergence in desert ecosystems. However, the effects of unpredictable rainfall and increasing temperature on seed germination and seedling emergence of dominant desert plants remain unclear across different deserts, which are important for population regeneration and community succession in desert ecosystems. Seed germination and seedling emergence of Haloxylon ammodendron across four deserts in Northwest China were examined at different rain frequencies with same total amount, and constant and alternating temperatures, to investigate their response to climate change. Rain frequency determined seed germination and seedling emergence of H. ammodendron in the Tengger Desert, Badain Jaran Desert, Gurbantonggut Desert and Mutthar Desert, which was maximal at rain frequency of 10 times per month and decreased with a decrease of rain frequency. Temperature was not a restricting factor for seed germination of H. ammodendron in the Tengger Desert, Badain Jaran Desert and Gurbantonggut Desert, varying from 10 degrees C to 25 degrees C and from 20/10 degrees C to 30/15 degrees C, respectively. However, the highest temperature of 25 degrees C and 30/15 degrees C inhibited seed germination of H. ammodendron in the Mutthar Desert. Thus, H. ammodendron has an opportunistic germination strategy. Under climate change in the future, seed germination and seedling emergence of H. ammodendron would be restricted by the combination of less frequent rainfall and increased temperature in desert ecosystems. The regeneration of the H. ammodendron community should be promoted by irrigation and seedling transplant.
英文关键词	Alternating temperature constant temperature rain frequency seed germination seedling emergence
类型	Article
语种	英语
开放获取类型	Green Published, gold
收录类别	SCI-E
WOS记录号	WOS:000962853300001
WOS关键词	ARTEMISIA SPECIES ASTERACEAE ; SOIL RESPIRATION ; INNER-MONGOLIA ; SAND DUNES ; PRECIPITATION ; BURIAL ; ESTABLISHMENT ; SURVIVAL ; STEPPE ; SHRUBS
WOS类目	Plant Sciences ; Ecology
WOS研究方向	Plant Sciences ; Environmental Sciences & Ecology
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/395329
推荐引用方式 GB/T 7714	Zhu, Yajuan,Jia, Zhiqing,Wang, Guoje,et al. Response of seed germination and seedling emergence of Haloxylon ammodendron to rain frequency and temperature change from four desert ecosystems, Northwest China[J],2023,15(2).
APA	Zhu, Yajuan,Jia, Zhiqing,Wang, Guoje,Ning, Husen,Ji, Xiaomin,&Luo, Qinghong.(2023).Response of seed germination and seedling emergence of Haloxylon ammodendron to rain frequency and temperature change from four desert ecosystems, Northwest China.AOB PLANTS,15(2).
MLA	Zhu, Yajuan,et al."Response of seed germination and seedling emergence of Haloxylon ammodendron to rain frequency and temperature change from four desert ecosystems, Northwest China".AOB PLANTS 15.2(2023).