期刊
PLANT SPECIES BIOLOGY
卷 35, 期 3, 页码 233-242出版社
WILEY
DOI: 10.1111/1442-1984.12275
关键词
facilitation; germination behavior; intraspecific interaction; neighbor recognition; water-soluble chemicals
资金
- Sasakawa Scientific Research Grant [2019-5023]
- JSPS [18K19353, 19H03295]
- Grants-in-Aid for Scientific Research [18K19353, 19H03295] Funding Source: KAKEN
Seeds express various germination behaviors in response to competitor plants. However, germination behaviors in response to facilitator plants are not yet well understood. Rumex obtusifolius seedlings usually appear on the ground near adult conspecific plants, and their survival rate under the canopy of adult conspecifics is higher than that outside the canopy, indicating that adult R. obtusifolius plants facilitate their seedling establishments. We hypothesized that emergence of R. obtusifolius seedlings is promoted by cues from adult conspecifics, but emergence of heterospecific seedlings is not. To test this, we investigated emergence responses of seedlings of R. obtusifolius and three other species that grow with R. obtusifolius in the presence of R. obtusifolius leaf phytochemicals. Emergence of R. obtusifolius seedlings was promoted by the presence of R. obtusifolius leaves. In contrast, emergence of other species seedlings was not promoted by R. obtusifolius leaves. We conclude that germination of R. obtusifolius seeds is facilitated in the presence of conspecifics, via water-soluble chemical exposure, and that recognizing these chemicals has adaptive value.
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