Key Laboratory of Sugarcane Biology and Genetic Breeding, Ministry of Agriculture, Fujian Agriculture and Forestry University, Fuzhou, 350002, China.
College of Agriculture, Fujian Agriculture and Forestry University, Fuzhou, 350002, China.
Environ Sci Pollut Res Int. 2022 Mar;29(14):20795-20807. doi: 10.1007/s11356-021-17229-4. Epub 2021 Nov 6.
Sugarcane cultivars (Saccharum officinarum L.) are widely cultivated for both sugar and renewable energy in China. The response of rhizosphere fungal composition and diversity to different emerging sugarcane cultivars is limited. Therefore, utilizing high-throughput sequencing, we explored fungal communities' structure in soils adhering to six sugarcane cultivars' roots (Guitang 08-120, Regan14-62, Guitang 08-1180, Haizhe 22, Liucheng 05-136, Taitang 22) in Guangxi Province, China. Our results suggested that sugarcane varieties significantly altered rhizosphere soil attributes, with Haizhe 22 having substantially lower soil pH, organic matter (OM), available phosphorus (AP), and soil water contents (SWC) than others cultivars. Different sugarcane varieties did not substantially affected the Shannon fungal diversity index, but the apparent effect on fungal richness was significant. Beta diversity analysis revealed that "Haizhe 22" distinguished the fungal community from the other five cultivars. Soil pH, OM, cultivars, and soil moisture were crucial determinants in shaping soil fungal composition. The Haizhe 22 rhizosphere significantly enriched the operational taxonomic units (OTUs) assigned to two fungal genera (Cephalotheca and Sagenomella), while rhizosphere of other verities significantly enriched the OTUs assigned to four fungal genera (Chaetomium, Chaetosphaeria, Mortierella, and Talaromyces), suggesting their essential role in plant development, disease tolerance, and bioremediation. These findings may help in selecting or breeding innovative genotypes capable of supporting abundant rhizosphere fungi beneficial to plants that would likely improve crops' agronomic potential and maintain soil ecosystem sustainability.
在中国，甘蔗品种（甘蔗 officinarum L.）广泛种植用于制糖和可再生能源。不同新兴甘蔗品种的根际真菌组成和多样性的响应有限。因此，我们利用高通量测序技术，研究了中国广西 6 个甘蔗品种（桂糖 08-120、Regan14-62、桂糖 08-1180、海蔗 22、柳城 05-136、台糖 22）根系附着土壤中的真菌群落结构。结果表明，甘蔗品种显著改变了根际土壤属性，海蔗 22 的土壤 pH 值、有机质（OM）、有效磷（AP）和土壤水分含量（SWC）显著低于其他品种。不同甘蔗品种对真菌多样性指数没有显著影响，但对真菌丰富度的影响明显。β多样性分析表明，“海蔗 22”将真菌群落与其他五个品种区分开来。土壤 pH 值、OM、品种和土壤水分是塑造土壤真菌组成的关键决定因素。海蔗 22 根际显著富集了两个真菌属（ Cephalotheca 和 Sagenomella）的分类操作单元（OTUs），而其他品种的根际则显著富集了四个真菌属（ Chaetomium、Chaetosphaeria、Mortierella 和 Talaromyces）的 OTUs，表明它们在植物发育、耐病性和生物修复中起着重要作用。这些发现可能有助于选择或培育具有丰富根际有益真菌的创新基因型，这可能会提高作物的农艺潜力并维持土壤生态系统的可持续性。
