首页|Effects of temperature and light on seed germination of ephemeral plants in the Gurbantunggut Desert,China: implications for vegetation restoration

Effects of temperature and light on seed germination of ephemeral plants in the Gurbantunggut Desert,China: implications for vegetation restoration

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Seed germination is a key transitional stage in plant life cycle and is strongly regulated by temperature and light.Therefore,research on the effects of temperature and light on seed germination is extremely meaningful for vegetation restoration,especially in desert ecosystems.Seeds of 28 ephemeral plants collected from the Gurbantunggut Desert of China were incubated at different temperatures (5℃/1℃,15℃/5℃,20℃/5℃,25℃/10℃ and 30℃/15℃) in 12-h light/12-h darkness or continuous darkness regimes,and the responses of seed germination to temperature and light and the germination speed were studied in 2016.Results showed that seed germination percentage of the 28 ephemeral plants significantly differed to temperature and light.We classified the studied plants as the following groups based on their responses to temperature:1 low temperature responsed plants,12 moderate temperature responsed plants,7 high temperature responsed plants,4 non-responsed plants and 5 plants of no germination.It should be noted that Corispermum lebmannianum Bunge is sensitive to both moderate and high temperatures.There were 4 groups of plant in response to light,i.e.,7 light responsed plants,10 dark responsed plants,6 light non-responsed plants and 5 plants of no germination.Based on seed germination speed of the 28 ephemeral plants,we divided them into 4 patterns of germination,i.e.,very rapid,moderately rapid,moderate and slow.Combining variations of temperature,precipitation and sand dune types in the study area,we suggested that very rapid and moderately rapid germinated plants could be used to moving sand dunes in early spring during vegetation restoration,moderate germinated plants could be used to semi-fixed sand dunes in late autumn,and slow germinated plants could be used to sand plain in summer.Thus,seedling establishment and vegetation restoration would be improved by considering seed germination characteristics of these ephemeral plants in the Gurbantunggut Desert,China.

dormancysand duneseed germination percentageseed germination patternsowing time

CHEN Yanfeng、CAO Qiumei、LI Dexin、LIU Huiliang、ZHANG Daoyuan

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Department of Tourism Management, School of Geography and Tourism, Qufu Normal University, Rizhao 276826, China

CAS Key Laboratory of Biogeography and Bioresource in Arid Land, Xinjiang Institute of Ecology and Geography, Chinese Academy of Sciences, Urumqi 830011, China

University of Chinese Academy of Sciences, Beijing 100049, China

Yili Botanical Garden, Xinjiang Institute of Ecology and Geography, Chinese Academy of Sciences, Xinyuan 835800, China

Turpan Eremophytes Botanical Garden, Chinese Academy of Sciences, Turpan 838008, China

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This study was funded by the Science and Technology Plan Project of Xinjiang Uygur Autonomous RegionNational Natural Science Foundation of ChinaNational Natural Science Foundation of ChinaNational Natural Science Foundation of ChinaNational Natural Science Foundation of Chinaand the Youth Innovation Promotion Association of Chinese Academy of Sciences

2016B03040315705293166016231971428317706382018477

2019

干旱区科学
中国科学院新疆生态与地理研究所,科学出版社

干旱区科学

CSTPCDCSCDSCI
影响因子：1.743
ISSN：1674-6767
年,卷(期)：2019.11(6)
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