Endophytic bacteria have been reported to have symbiotic, mutualistic, commensalistic or trophobiotic relationships with various plant parts. As part of its adaptation, many endophytic organisms are known to exhibit properties with multiple beneficial effects to the plant system. Even though many bacterial genera have been identified to have endophytic association, isolation of those which were previously demonstrated well for human association is quite interesting. In the study, endophytic bacteria Ceb1 isolated from the rhizome of Curcuma longa was identified by 16S rDNA sequencing as Staphylococcus sp. Further, Ceb1 was observed to have the ability to tolerate drought stress. While screening for the plant growth-promoting traits, Ceb1 was found to be positive for IAA production both under drought-stressed and normal conditions as confirmed by HPLC. The Ceb1 priming with Vigna unguiculata was observed to enhance the growth parameters of the plant. Analysis of Ceb1-treated plants by ICP-MS further showed modulation of both macro- and micronutrients. Upon drought stress induction in Vigna unguiculata, Ceb1 was found to provide synergistic plant growth-promoting effect to the plant along with the supplemented silicate sources. Under the changing agroclimatic conditions, exploring the plant stress-alleviating effects of endophytes is highly significant.

中文翻译：

---

耐旱和促进植物生长的内生葡萄球菌属。与补充硅酸盐有协同作用

据报道，内生细菌与植物的各个部分具有共生、共生、共生或滋养关系。作为其适应的一部分，已知许多内生生物表现出对植物系统具有多种有益影响的特性。尽管已鉴定出许多细菌属具有内生关联，但分离先前已证明与人类关联良好的那些属非常有趣。在该研究中，从姜黄根茎中分离出的内生细菌 Ceb1 通过 16S rDNA 测序鉴定为葡萄球菌属。此外，观察到 Ceb1 具有耐受干旱胁迫的能力。在筛选植物促生长性状时，经 HPLC 证实，Ceb1 在干旱胁迫和正常条件下对 IAA 产生呈阳性。观察到用豇豆引发的 Ceb1 提高了植物的生长参数。通过 ICP-MS 对 Ceb1 处理的植物进行的分析进一步显示了大量和微量营养素的调节。在 Vigna unguiculata 中诱导干旱胁迫后，发现 Ceb1 与补充的硅酸盐来源一起为植物提供协同的植物生长促进作用。在不断变化的农业气候条件下，探索内生菌对植物的胁迫缓解作用具有十分重要的意义。在 Vigna unguiculata 中诱导干旱胁迫后，发现 Ceb1 与补充的硅酸盐来源一起为植物提供协同的植物生长促进作用。在不断变化的农业气候条件下，探索内生菌对植物的胁迫缓解作用具有十分重要的意义。在 Vigna unguiculata 中诱导干旱胁迫后，发现 Ceb1 与补充的硅酸盐来源一起为植物提供协同的植物生长促进作用。在不断变化的农业气候条件下，探索内生菌对植物的胁迫缓解作用具有十分重要的意义。