Raza Ali, Ling Shao-Jun, Wei Ya-Li, Bahadur Saraj, Ren Ming-Xun
Ministry of Education Key Laboratory for Genetics and Germplasm Innovation of Tropical Special Forest Trees and Ornamental Plants, Hainan University, Haikou 570228, China.
International Joint Center for Terrestrial Biodiversity Around South China Sea of Hainan Province, Hainan University, Haikou 570228, China.
Plants (Basel). 2025 Aug 20;14(16):2588. doi: 10.3390/plants14162588.
Plant-to-plant interactions are essential for structuring plant communities and supporting adaptation in nutrient-poor, seasonally dry environments. This study examined the interactions between moss Dozy & Molk and by analyzing microbial communities and physicochemical parameters across various sample types. These included soil [bare (B), (O), moss (M), and moss + (MO)], rhizosphere soil [ (ORS), moss (MRS), and moss + (MORS)], and root [ (OHR), moss (MR), and moss + (MOR)] using metagenomics sequencing across dry and wet seasons in limestone habitats on Hainan Island. During the dry season, combined plant samples MOR, MO, and MORS showed higher nutrients, supported by microbes that enhance nutrient turnover, which may indicate facilitation. Conversely, during the wet season, increased moisture leads to decreased nutrient levels and microbial communities shift, associated with slower nutrient turnover in combined plant samples, which may reflect competition. According to KEGG analysis, an increase in oxidative phosphorylation and ABC transporters in the dry season supported the facilitative interaction, while quorum sensing and two-component systems supported the competitive interaction in the wet season. These findings show how shifts between facilitation and competition arise from seasonal conditions and microbes in the limestone ecosystem.
植物间相互作用对于构建植物群落以及支持植物在养分贫瘠、季节性干旱环境中的适应性至关重要。本研究通过分析不同样本类型中的微生物群落和理化参数，研究了苔藓Dozy & Molk与[植物名称缺失]之间的相互作用。这些样本类型包括土壤[裸土（B）、[植物名称缺失]（O）、苔藓（M）和苔藓 + [植物名称缺失]（MO）]、根际土壤[[植物名称缺失]根际土壤（ORS）、苔藓根际土壤（MRS）和苔藓 + [植物名称缺失]根际土壤（MORS）]以及根系[[植物名称缺失]根系（OHR）、苔藓根系（MR）和苔藓 + [植物名称缺失]根系（MOR）]，采用宏基因组测序技术，对海南岛石灰岩生境的干湿季进行了研究。在旱季，组合植物样本MOR、MO和MORS显示出较高的养分含量，这得到了促进养分周转的微生物的支持，这可能表明存在促进作用。相反，在雨季，水分增加导致养分水平下降，微生物群落发生变化，与组合植物样本中较慢的养分周转相关，这可能反映了竞争关系。根据KEGG分析，旱季氧化磷酸化和ABC转运蛋白的增加支持了促进性相互作用，而群体感应和双组分系统在雨季支持了竞争性相互作用。这些发现表明了促进作用和竞争作用之间的转变是如何由石灰岩生态系统中的季节性条件和微生物引起的。
