Amity Institute of Microbial Technology, Amity University Noida, Noida, Uttar Pradesh, India.
Phymatomics Technologies, Ghaziabad, Uttar Pradesh, India.
Sci Rep. 2024 Mar 12;14(1):6022. doi: 10.1038/s41598-024-54687-5.
In the Kandi zone of Punjab, India, root and rhizospheric soil samples were collected from the local vegetation near the Shivalik mountain foothills. Fifteen fungal colonies exhibiting distinct cultural morphology on Potato Dextrose Agar (PDA) plates were selected for plant-microbe interaction studies. Among these, the isolate HNB9 was identified as a nonpathogenic root colonizer. Morphological and molecular analyses confirmed HNB9 as Talaromyces albobiverticillius, characterized by the secretion of a red pigment as a secondary metabolite. Plants colonized with T. albobiverticillius HNB9 exhibited enhanced growth, manifesting in increased shoot and root length compared to untreated controls. This study unveiled the first evidence that a species from the Talaromyces genus, specifically T. albobiverticillius, possesses dual capabilities of root colonization and plant growth promotion. Moreover, HNB9 demonstrated the production of plant growth-regulating compounds like Indole Acetic Acid (IAA) and proficient solubilization of crucial nutrients (Phosphorous, Zinc, and Silica) through plate culture methods. This finding represents a significant contribution to the understanding of root-colonizing fungi with plant growth-promoting attributes, challenging the existing knowledge gap within the Talaromyces genus.
在印度旁遮普邦的坎迪地区，从喜马偕尔山山麓附近的当地植被中采集了根和根际土壤样本。从马铃薯葡萄糖琼脂（PDA）平板上表现出明显文化形态的十五个真菌菌落中选择了用于植物-微生物相互作用研究的真菌。在这些真菌中，分离株 HNB9 被鉴定为非致病性根定殖菌。形态学和分子分析证实 HNB9 为白绿木霉，其特征是分泌一种红色色素作为次生代谢产物。与未处理对照相比，被白绿木霉 HNB9 定殖的植物表现出增强的生长，表现在增加的茎和根长。这项研究首次揭示了一个来自塔马尔氏菌属的物种，即白绿木霉，具有根定殖和促进植物生长的双重能力。此外，HNB9 通过平板培养方法表现出产生植物生长调节化合物（如吲哚乙酸（IAA））和有效溶解关键营养物质（磷、锌和硅）的能力。这一发现为理解具有促进植物生长属性的根定殖真菌做出了重大贡献，挑战了塔马尔氏菌属内现有的知识空白。
