: Soil salinity is one of the most important abiotic stresses limiting plant growth and productivity. The breeding of salt-tolerant wheat cultivars has substantially relieved the adverse effects of salt stress. Complementing these cultivars with growth-promoting microbes has the potential to stimulate and further enhance their salt tolerance. In this study, two fungal isolates, Th4 and Th6, and one bacterial isolate, C7, were isolated. The phylogenetic analyses suggested that these isolates were closely related to Trichoderma yunnanense, Trichoderma afroharzianum, and Bacillus licheniformis, respectively. These isolates produced indole-3-acetic acid (IAA) under salt stress (200 mM). The abilities of these isolates to enhance salt tolerance were investigated by seed coatings on salt-sensitive and salt-tolerant wheat cultivars. Salt stress (S), cultivar (C), and microbial treatment (M) significantly affected water use efficiency. The interaction effect of M x S significantly correlated with all photosynthetic parameters investigated. Treatments with Trichoderma isolates enhanced net photosynthesis, water use efficiency and biomass production. Principal component analysis revealed that the influences of microbial isolates on the photosynthetic parameters of the different wheat cultivars differed substantially. This study illustrated that Trichoderma isolates enhance the growth of wheat under salt stress and demonstrated the potential of using these isolates as plant biostimulants.

中文翻译：

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木霉能增强盐胁迫下小麦的净光合作用，水分利用效率和小麦的生长

：土壤盐分是限制植物生长和生产力的最重要的非生物胁迫之一。耐盐小麦品种的选种已大大缓解了盐胁迫的不利影响。用促进生长的微生物补充这些品种具有刺激和进一步提高其耐盐性的潜力。在这项研究中，分离了两个真菌分离株Th4和Th6，以及一个细菌分离株C7。系统发育分析表明，这些菌株密切相关木霉云南贯众，木霉afroharzianum，和地衣芽孢杆菌， 分别。这些分离物在盐胁迫（200 mM）下产生吲哚-3-乙酸（IAA）。通过对盐敏感和耐盐的小麦品种的种子包衣研究了这些分离株增强耐盐性的能力。盐胁迫（S），品种（C）和微生物处理（M）显着影响水分利用效率。M x S的相互作用效应与研究的所有光合参数显着相关。用木霉分离株进行处理可以提高净光合作用，提高用水效率和生产生物量。主成分分析表明，分离菌株对不同小麦品种光合参数的影响差异很大。这项研究说明木霉属分离株增强了盐胁迫下小麦的生长，并证明了将这些分离株用作植物生物刺激剂的潜力。