Department of Agricultural Biotechnology, Seoul National University, Seoul, 08826, Republic of Korea.
Interdisciplinary Program in Agricultural Genomics, Seoul National University, Seoul, 08826, Republic of Korea.
Commun Biol. 2022 Aug 1;5(1):772. doi: 10.1038/s42003-022-03726-w.
Vertical transmission of microbes is crucial for the persistence of host-associated microbial communities. Although vertical transmission of seed microbes has been reported from diverse plants, ecological mechanisms and dynamics of microbial communities from parent to progeny remain scarce. Here we reveal the veiled ecological mechanism governing transmission of bacterial and fungal communities in rice across two consecutive seasons. We identify 29 bacterial and 34 fungal members transmitted across generations. Abundance-based regression models allow to classify colonization types of the microbes. We find that they are late colonizers dominating each community at the ripening stage. Ecological models further show that the observed temporal colonization patterns are affected by niche change and neutrality. Source-sink modeling reveals that parental seeds and stem endosphere are major origins of progeny seed microbial communities. This study gives empirical evidence for ecological mechanism and dynamics of bacterial and fungal communities as an ecological continuum during seed-to-seed transmission.
微生物的垂直传播对于宿主相关微生物群落的持续存在至关重要。尽管已经有报道称多种植物存在种子微生物的垂直传播，但微生物群落从亲代到后代的生态机制和动态仍知之甚少。在这里，我们揭示了控制水稻中细菌和真菌群落跨两个连续季节传播的隐蔽生态机制。我们鉴定出 29 种细菌和 34 种真菌成员在世代间传播。基于丰度的回归模型允许对微生物的定殖类型进行分类。我们发现，它们是晚期定殖者，在成熟阶段主导每个群落。生态模型进一步表明，观察到的时间定殖模式受生态位变化和中性的影响。源-汇模型表明，亲代种子和茎内皮层是后代种子微生物群落的主要起源。这项研究为细菌和真菌群落作为种子到种子传播过程中的生态连续体的生态机制和动态提供了经验证据。
