Helianthus tuberosus L. (sunchoke or Jerusalem artichoke) has been widely applied in food and industrial products. Due to its economical benefits, sunchoke has been of great interest in many areas. Therefore, the aims of this study were to isolate fungal endophytes from sunchoke and screen for their ability to produce IAA, GA₃ and other plant growth-promoting (PGP) agents. Among a total of 126 isolates, 4 most effective PGP strains were identified as C. gloeosporioides CPS3/5, G. cingulate NMS1.4, E. rostratum NMS1.5 and Xylariaceae sp. KKL3. In the pot experiments, several plant growth parameters such as plant height, diameter of stem, SPAD chlorophyll content, plant biomass, plant root growth, the number of tubers and tuber inulin content in sunchoke inoculated with these fungal endophytes were significantly higher than those of the uninoculated controls. Outstandingly, E. rostratum NMS1.5 exhibited the best performance on promoting growth and yield of sunchoke. Interestingly, strain NMS1.5 is the first member of E. rostratum that is beneficial to plant growth without causing any negative effects. This study suggested that our fungal endophytes can be effective plant growth promoters for use as biofertilizers for sunchoke production.

向日葵（洋蓟或菊芋）已广泛应用于食品和工业产品中。由于其经济利益，防晒霜在许多领域引起了人们的极大兴趣。因此，本研究的目的是从抗日疫中分离出真菌内生菌，并筛选其产生IAA，GA ₃和其他植物生长促进剂（PGP）的能力。间共有126株，4个最有效的PGP菌株被鉴定为炭疽菌CPS3 / 5，G.扣带NMS1.4，E.喙NMS1.5和Xylariaceae sp。吉隆坡3。在盆栽试验中，接种这些真菌内生菌的几株植物生长参数，例如株高，茎直径，SPAD叶绿素含量，植物生物量，植物根系生长，块茎数和块茎菊粉含量均显着高于那些。未经接种的对照。显着地，E.喙NMS1.5表现出促进生长和菊芋的产率的最佳性能。有趣的是，菌株NMS1.5是E. rostratum的第一个成员，它对植物生长有益而不会引起任何负面影响。这项研究表明，我们的真菌内生菌可以作为有效的植物生长促进剂，用作生产ch的生物肥料。