Vu Minh Thiet, Geraldi Almando, Do Hoang Dang Khoa, Luqman Arif, Nguyen Hoang Danh, Fauzia Faiza Nur, Amalludin Fahmi Ikhlasul, Sadila Aliffa Yusti, Wijaya Nabilla Hapsari, Santoso Heri, Manuhara Yosephine Sri Wulan, Bui Le Minh, Hariyanto Sucipto, Wibowo Anjar Tri
NTT Hi-Tech Institute, Nguyen Tat Thanh University, Ho Chi Minh City 70000, Vietnam.
Departement of Biology, Faculty of Science and Technology, Airlangga University, Surabaya 60115, Indonesia.
Biology (Basel). 2022 Apr 30;11(5):695. doi: 10.3390/biology11050695.
Soil salinity and mineral deficiency are major problems in agriculture. Many studies have reported that plant-associated microbiota, particularly rhizosphere and root microbiota, play a crucial role in tolerance against salinity and mineral deficiency. Nevertheless, there are still many unknown parts of plant-microbe interaction, especially regarding their role in halophyte adaptation to coastal ecosystems. Here, we report the bacterial community associated with the roots of coastal sand dune halophytes and and the soil properties that affect their composition. Strong correlations were observed between root bacterial diversity and soil mineral composition, especially with soil Calcium (Ca), Titanium (Ti), Cuprum (Cu), and Zinc (Zn) content. Soil Ti and Zn content showed a positive correlation with bacterial diversity, while soil Ca and Cu had a negative effect on bacterial diversity. A strong correlation was also found between the abundance of several bacterial species with soil salinity and mineral content, suggesting that some bacteria are responsive to changes in soil salinity and mineral content. Some of the identified bacteria, such as and , are known to have growth-promoting effects on plants. Together, the findings of this work provided valuable information regarding bacterial communities associated with the roots of sand dune halophytes and their interactions with soil properties. Furthermore, we also identified several bacterial species that might be involved in tolerance against stresses. Further work will be focused on isolation and transplantation of these potential microbes, to validate their role in plant tolerance against stresses, not only in their native hosts but also in crops.
土壤盐渍化和矿物质缺乏是农业中的主要问题。许多研究报告称，与植物相关的微生物群，尤其是根际和根系微生物群，在耐盐性和矿物质缺乏方面起着关键作用。然而，植物与微生物相互作用的许多方面仍然未知，特别是它们在盐生植物适应沿海生态系统中的作用。在此，我们报告了与沿海沙丘盐生植物根系相关的细菌群落以及影响其组成的土壤特性。观察到根系细菌多样性与土壤矿物质组成之间存在强相关性，尤其是与土壤钙（Ca）、钛（Ti）、铜（Cu）和锌（Zn）含量。土壤Ti和Zn含量与细菌多样性呈正相关，而土壤Ca和Cu对细菌多样性有负面影响。还发现几种细菌物种的丰度与土壤盐度和矿物质含量之间存在强相关性，这表明一些细菌对土壤盐度和矿物质含量的变化有反应。一些已鉴定的细菌，如 和 ，已知对植物具有促生长作用。总之，这项工作的结果提供了关于与沙丘盐生植物根系相关的细菌群落及其与土壤特性相互作用的有价值信息。此外，我们还鉴定了几种可能参与抗逆性的细菌物种。进一步的工作将集中在这些潜在微生物的分离和移植上，以验证它们在植物抗逆性中的作用，不仅在其原生宿主中，而且在作物中。
