Arid
DOI10.7717/peerj.4447
Grazing influences Stipa breviflora seed germination in desert grasslands of the Inner Mongolia Plateau
Liu, Wenting; Wang, Tianle; Zhang, Shuang; Ding, Lijun; Wei, Zhijun
通讯作者Wei, Zhijun
来源期刊PEERJ
ISSN2167-8359
出版年2018
卷号6
英文摘要

Seed germination plays an important role in determining the composition and regeneration of plant populations (Stipa breviflora). However, the influencing factors and strategies employed for seed germination in desert grasslands under grazing remain unknown. Therefore, in this study, the reproductive allocation, seed density, seed properties, and corresponding seed germination rates of S. breviflora were examined. Possible situations encountered during dispersal were also simulated to determine their effects on seed germination. The results showed that reproductive individual density not subjected to grazing were significantly higher than those subjected to moderate and heavy grazing. For seed density and seed bank in soil, the highest values were observed for the no grazing treatment, followed by the moderate and heavy grazing treatments. The seed density for germination of soil seed banks was nearly one-fourth of seed density during the growing season. In addition, grazing treatments affected the phenotypic characteristics of seeds and reduced the lower limit of the weight of germinable seeds. Awn removal significantly increased germination. The longest germination time was observed for seeds that entered the soil at an angle of 0 degrees. Our research demonstrated that grazing negatively affected the desert grassland edificator. Individual plants adopted different adaptation strategies under different grazing intensities; for example, a fixed proportion of the seed number and seed germination number of S. breviflora in the soil seed bank was maintained by exceeding the minimum weight of a seed for seed germination. During seed dispersion, the awn effectively prevented germination under unfavourable conditions and helped seeds enter the soil at an optimal angle for promoting germination.


英文关键词Reproductive strategy Seed number Seed phenotypic characteristics
类型Article
语种英语
国家Peoples R China
收录类别SCI-E
WOS记录号WOS:000426525100005
WOS关键词TEMPERATURE ; MORPHOLOGY ; TOLERANCE ; DIASPORES ; SALINITY ; DORMANCY ; BEHAVIOR ; BURIAL ; DEPTH ; LIGHT
WOS类目Multidisciplinary Sciences
WOS研究方向Science & Technology - Other Topics
资源类型期刊论文
条目标识符http://119.78.100.177/qdio/handle/2XILL650/212020
作者单位Inner Mongolia Agr Univ, Coll Grassland Resources & Environm, Hohhot, Peoples R China
推荐引用方式
GB/T 7714
Liu, Wenting,Wang, Tianle,Zhang, Shuang,et al. Grazing influences Stipa breviflora seed germination in desert grasslands of the Inner Mongolia Plateau[J],2018,6.
APA Liu, Wenting,Wang, Tianle,Zhang, Shuang,Ding, Lijun,&Wei, Zhijun.(2018).Grazing influences Stipa breviflora seed germination in desert grasslands of the Inner Mongolia Plateau.PEERJ,6.
MLA Liu, Wenting,et al."Grazing influences Stipa breviflora seed germination in desert grasslands of the Inner Mongolia Plateau".PEERJ 6(2018).
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