Liu Lei, Lin Wei, Zhang Li, Tang Xuexiao, Liu Yue, Lan Siren, Wang Shusheng, Zhou Yan, Chen Xiaochou, Wang Ling, Chen Xiang, Guo Lijin
Key Laboratory of Genetics and Germplasm Innovation of Tropical Special Forest Trees and Ornamental Plants, Ministry of Education/College of Forestry, Hainan University, Haikou, China.
College of Forestry, Fujian Agriculture and Forestry University, Fuzhou, China.
Front Plant Sci. 2022 Jul 22;13:950947. doi: 10.3389/fpls.2022.950947. eCollection 2022.
The relationship between and its soil microbial community under heat stress was not clear. In this study, the effects of heat stress on the physiological characteristics, soil physicochemical properties and soil microbial community structure of were investigated. The experimental control (CK) was set as day/night (14/10 h) 25/20°C and experimental treatments were set as light heat stress (LHS) 35/30°C and high heat stress (HHS) 40/35°C. Our results showed that, compared with CK, LHS treatment significantly increased malondialdehyde, hydrogen peroxide, proline and soluble sugar contents, as well as catalase and peroxidase activities, while HHS treatment significantly increased ascorbate peroxidase activity and decreased chlorophyll content. Compared with CK, LHS treatment significantly reduced soil ammonium-nitrogen and nitrate-nitrogen content, while HHS significantly increased soil ammonium-nitrogen content. Compared with CK, both treatments changed the soil microbial community structure. For bacterial community, LHS and HHS treatment resulting in the significant enrichment of and , respectively. For fungal community, LHS treatment resulting in the significant enrichment of and . The redundancy analysis showed that plant physiological characteristics, soil ammonium-nitrogen content were significantly correlated with the soil microbial community. Therefore, heat stress altered the soil microbial community structure, and affected the availability of soil available nitrogen, which in turn affected the physiological characteristics of . We suggest that soil microbial community may play an important role in plant resistance to heat stress, and its mechanism deserves further study.
在热胁迫下，[植物名称]与其土壤微生物群落之间的关系尚不清楚。本研究调查了热胁迫对[植物名称]的生理特性、土壤理化性质和土壤微生物群落结构的影响。实验对照（CK）设定为日/夜（14/10小时）25/20°C，实验处理设定为轻度热胁迫（LHS）35/30°C和重度热胁迫（HHS）40/35°C。我们的结果表明，与CK相比，LHS处理显著增加了丙二醛、过氧化氢、脯氨酸和可溶性糖含量，以及过氧化氢酶和过氧化物酶活性，而HHS处理显著增加了抗坏血酸过氧化物酶活性并降低了叶绿素含量。与CK相比，LHS处理显著降低了土壤铵态氮和硝态氮含量，而HHS显著增加了土壤铵态氮含量。与CK相比，两种处理均改变了土壤微生物群落结构。对于细菌群落，LHS和HHS处理分别导致[细菌名称1]和[细菌名称2]的显著富集。对于真菌群落，LHS处理导致[真菌名称1]和[真菌名称2]的显著富集。冗余分析表明，植物生理特性、土壤铵态氮含量与土壤微生物群落显著相关。因此，热胁迫改变了土壤微生物群落结构，并影响了土壤有效氮的有效性，进而影响了[植物名称]的生理特性。我们认为土壤微生物群落可能在植物抗热胁迫中发挥重要作用，其机制值得进一步研究。
