Jeong Seorin, Kim Tae-Min, Choi Byungwook, Kim Yousuk, Kim Hwan, Kim Eunsuk
School of Earth Sciences and Environmental Engineering, Gwangju Institute of Science and Technology, Gwangju 61005, Korea.
GIST Central Research Facilities, Bio Imaging Laboratory, Gwangju Institute of Science and Technology, Gwangju 61005, Korea.
Microorganisms. 2022 Aug 9;10(8):1604. doi: 10.3390/microorganisms10081604.
Recent studies have demonstrated that seed-borne bacteria can enhance the performance of invasive plants in novel introduced habitats with environmental stresses. The effect of this plant-bacteria interaction may vary with plant species or even genotype; however, the genotype-dependent effects of seed bacteria have rarely been assessed. In this study, we examined the effects of bacterial strains isolated from seeds on the genotypes of an invasive xerophytic plant, . Plant genotypes were grown under drought conditions, and their plastic responses to bacterial infections were evaluated. Some genotypes produced more biomass, whereas others produced less biomass in response to infection with the same bacterial strain. Notably, the quantity of root-adhering soil depended on the bacterial treatment and plant genotypes and was positively correlated with the plastic responses of plant performance. Because tested bacteria could colonize the plant rhizosphere, bacterial infection appears to induce the differential formation of soil rhizosheaths among plant genotypes, consequently affecting the maintenance of soil water content under drought conditions. Given that drought tolerance is a critical attribute for the invasive success of , these results imply that bacterial symbionts can facilitate the establishment of alien plant species, but their effects are likely genotype-specific.
最近的研究表明，种子携带的细菌可以提高入侵植物在面临环境压力的新引入栖息地中的表现。这种植物与细菌相互作用的效果可能因植物物种甚至基因型而异；然而，种子细菌对基因型的依赖性影响很少得到评估。在本研究中，我们研究了从种子中分离出的细菌菌株对一种入侵旱生植物基因型的影响。将植物基因型在干旱条件下培养，并评估它们对细菌感染的可塑性反应。一些基因型产生了更多的生物量，而另一些基因型在感染相同细菌菌株时产生的生物量较少。值得注意的是，根际附着土壤的数量取决于细菌处理和植物基因型，并且与植物表现的可塑性反应呈正相关。由于测试的细菌可以定殖在植物根际，细菌感染似乎会诱导植物基因型之间土壤根鞘的差异形成，从而影响干旱条件下土壤水分含量的维持。鉴于耐旱性是该入侵植物成功入侵的关键属性，这些结果意味着细菌共生体可以促进外来植物物种的定殖，但其影响可能具有基因型特异性。
