Promotion of mushroom growth by means of biological agents replacing chemicals is an emerging and highly demanded issue in the sector of mushroom cropping. The present study was aimed to search for a novel bacterium potentially able to enhance mushroom growth and yield. A total of 2165 bacterial isolates purified from different samples were scrutinized through various growth‐promoting attributes. As a consequence of rigorous screening, 26 isolates found exhibiting positive traits of mushroom growth promotion. Thereafter, in response to the cocultivation (fungus and bacteria), a potent bacterial strain was isolated capable to improve significantly the mycelial growth. In cocultivation the highest radial and linear growth rate was 7.6 and 8.1 mm/day on 10th and 11th days, respectively. The fruitbody yields and biological efficiency (BE) of the inoculated sets were 28% and 58% higher than the uninoculated control sets. The bacterium was molecularly identified based on 16S ribosomal RNA sequencing and confirmed as Glutamicibacter arilaitensis MRC119. Therefore, the bioinoculant of the current bacterium can be potentially useful as an ecofriendly substitute stimulating the production of mushroom fruit bodies with improved BE.

中文翻译：

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促生长菌Glutamicibacter arilaitensis MRC119促进平菇的生长和产量

通过生物制剂代替化学品促进蘑菇生长是蘑菇种植领域一个新兴且亟待解决的问题。本研究旨在寻找一种可能促进蘑菇生长和产量的新型细菌。通过各种促进生长的特性，对从不同样品中纯化的总共 2165 种细菌分离物进行了仔细检查。经过严格筛选，发现 26 个分离株表现出促进蘑菇生长的积极特征。此后，响应共培养（真菌和细菌），分离出一种能够显着改善菌丝体生长的有效细菌菌株。在共培养中，第 10 天和第 11 天的最高径向和线性增长率分别为 7.6 和 8.1 毫米/天。接种组的子实体产量和生物效率 (BE) 比未接种的对照组高 28% 和 58%。该细菌基于 16S 核糖体 RNA 测序进行分子鉴定，并确认为 Glutamicibacter arilaitensis MRC119。因此，当前细菌的生物接种剂可以作为一种生态友好的替代品，刺激具有改善的 BE 的蘑菇子实体的生产。