首页|红缨子高粱根系细菌菌群中核心菌群和特有菌群的作用

红缨子高粱根系细菌菌群中核心菌群和特有菌群的作用

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该研究利用16S rDNA高通量测序技术研究红缨子高粱根系组分间核心菌群(CC)和特有菌群(UC)在总菌群(EC)多样性形成中的作用，并结合15个土壤养分指标探究菌群对根系土壤养分的影响。结果表明，CC和UC分别以优势菌群和稀有菌群为主。UC的Shannon指数和平均成对谱系距离(MPD)指数均显著高于CC(P＜0。05)，且UC的MPD指数显著高于EC(P＜0。05)，表明UC对EC维持α多样性水平起到关键作用。CC和UC均与EC演替极显著相关(P＜0。01)，而CC和UC之间无显著相关性(P＞0。05)，表明EC演替可同时受到CC和UC的作用，但CC和UC之间的演替模式相对独立。CC和UC对EC的演替贡献分别为49。1％和20。0％，说明CC是EC演替的主要推动力。EC中共发现以变形杆菌门(Proteobacteria)(59。4％)和拟杆菌门(Bacteroidota)(14。2％)为代表的8种优势细菌门，这些菌群越向根组织迁移，对根系土壤养分变化，特别是与氮、磷、钾循环有关的指标变化，作用越明显。在根际和根面水平，CC是EC中影响土壤养分变化的主要群落，且对有机质有显著影响的菌群分布在根际。
Role of core and unique communities in root bacterial community of sorghum cultivar Hongyingzi
The role of core communities(CC)and unique communities(UC)in root bacterial community of sorghum cultivar Hongyingzi in shaping the diversity of the entire community(EC)was investigated,and the impact on the nutrients of soil in root system was explored based on 15 soil nutrient indices.The results revealed that CC and UC were dominated by abundant and rare microbiota,respectively.The Shannon and mean pairwise phylo-genetic distance(MPD)indexes of UC were significantly higher than those of CC(P＜0.05),and MPD index of UC was significantly higher than that of EC(P＜0.05),indicating that UC played a critical role in maintaining α-diversity levels of EC.Both CC and UC were highly significantly correlated with EC succession(P＜0.01),while there was no significant correlation between CC and UC(P＞0.05),indicating that EC succession was simulta-neously influenced by CC and UC,but the succession patterns between CC and UC were relatively independent.The contributions of CC and UC to EC succession were 49.1％and 20.0％,respectively,indicating that CC was the primary driving force behind EC succession.A total of 8 dominant bacterial phyla were identified in EC,represented by Proteobacteria(59.4％)and Actinobacteria(14.2％).Furthermore,as the microbiota migrated to-wards root tissues,their effects on changes in nutrients of soil in root system,particularly those related to nitrogen,phosphorus,and potassium cy-cling,became more pronounced.Regarding the rhizosphere and rhizoplane,CC was the major community influencing soil nutrients changes in EC,with the distribution of microbiota significantly affecting organic matter occurring mainly in the rhizosphere.

sorghum cultivar Hongyingzibacterial communityroot systemsoil nutrient indicatorcorrelation

赵亮、闵卓、江璐、罗贞标、吴福勇、王相勇、王新叶

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茅台学院 酿酒工程系,贵州 遵义 564507

红缨子高粱 细菌菌群 根系 土壤养分指标 相关性

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2024

10.11882/j.issn.0254-5071.2024.10.021

中国酿造
中国调味品协会 北京食品科学研究院

中国酿造

CSTPCD北大核心
影响因子：0.759
ISSN：0254-5071
年,卷(期)：2024.43(10)