Jiang Hang, Ma Liguo, Gao Peixin, Zhang Yueli, Zhang Bo, Ma Guoping, Qi Kai, Qi Junshan
Shandong Key Laboratory for Green Prevention and Control of Agricultural Pests, Institute of Plant Protection, Shandong Academy of Agricultural Sciences, Jinan 250100, China.
Microorganisms. 2024 Jul 24;12(8):1516. doi: 10.3390/microorganisms12081516.
Wheat is a vital global food crop, yet it faces challenges in saline-alkali soils where Fusarium crown rot significantly impacts growth. Variations in wheat growth across regions are often attributed to uneven terrain. To explore these disparities, we examined well-growing and poorly growing wheat samples and their rhizosphere soils. Measurements included wheat height, root length, fresh weight, and Fusarium crown rot severity. Well-growing wheat exhibited greater height, root length, and fresh weight, with a lower Fusarium crown rot disease index compared to poorly growing wheat. Analysis of rhizosphere soil revealed higher alkalinity; lower nutrient levels; and elevated Na, K, and Ca levels in poorly growing wheat compared to well-growing wheat. High-throughput sequencing identified a higher proportion of unique operational taxonomic units (OTUs) in poorly growing wheat, suggesting selection for distinct fungal species under stress. FUNGuild analysis indicated a higher prevalence of pathogenic microbial communities in poorly growing wheat rhizosphere soil. This study underscores how uneven terrains in saline-alkali soils affect pH, nutrient dynamics, mineral content, wheat health, and rhizosphere fungal community structure.
小麦是全球重要的粮食作物，但在盐碱地面临挑战，镰刀菌冠腐病对其生长有显著影响。不同地区小麦生长的差异通常归因于地形不平。为探究这些差异，我们检查了生长良好和生长不良的小麦样本及其根际土壤。测量指标包括小麦株高、根长、鲜重和镰刀菌冠腐病严重程度。与生长不良的小麦相比，生长良好的小麦株高更高、根长更长、鲜重更大，镰刀菌冠腐病病情指数更低。根际土壤分析表明，与生长良好的小麦相比，生长不良的小麦土壤碱度更高、养分水平更低，钠、钾和钙含量更高。高通量测序显示，生长不良的小麦中独特的可操作分类单元（OTU）比例更高，这表明在胁迫条件下会选择不同的真菌物种。FUNGuild分析表明，生长不良的小麦根际土壤中致病微生物群落的患病率更高。这项研究强调了盐碱地地形不平如何影响土壤pH值、养分动态、矿物质含量、小麦健康和根际真菌群落结构。
