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.

中文翻译：

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种子中的生化识别：促进成年同种异体叶片促进了百叶草的萌发

种子表现出对竞争植物的各种发芽行为。然而，响应促进植物发芽的行为还不是很清楚。钝叶酸模苗通常出现在附近的成年同种植物的地上，和成人同种类的树冠下的存活率比外面的树冠较高，表明成人R. obtusifolius植物促进他们的苗木场所。我们假设的是出现R. obtusifolius苗被暗示与成人同种推动，但异种出苗不是。为了测试这一点，我们调查了R. obtusifolius和其他三个随生长的物种的幼苗的出苗响应R. obtusifolius在存在R. obtusifolius叶植物化学物质。的出现R. obtusifolius苗是由存在促进R. obtusifolius叶。相反，钝角红景天叶片不能促进其他物种幼苗的出现。我们得出的结论是，在特定物种存在下，通过水溶性化学物质的暴露可以促进钝角红豆种子的发芽，并且认识到这些化学物质具有适应性价值。