Knowledge Resource Center for Ecological Environment in Arid Area
DOI | 10.7717/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
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ISSN | 2167-8359 |
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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