Page 99 - 《广西植物》2025年第11期
P. 99
11 期 何紫薇等: 不同繁殖方式对宿根蔗根系内生微生物群落结构与功能的影响 2 0 4 3
Effects of different propagation methods on the structure
and function of endophytic microbial community
in ratoon cane roots
1 3 1 1 2 2
HE Ziwei ꎬ LU Wen ꎬ FENG Junqian ꎬ WEI Xun ꎬ TAN Hongwei ꎬ GAO Yijing ꎬ
4∗
1
YANG Shangdong ꎬ PAN Yongpeng ꎬ LUO Yawei 2∗
( 1. Guangxi Key Laboratory of Agricultural Product Safetyꎬ National Experimental Teaching Demonstration Center of Plant Scienceꎬ College of
Agriculturalꎬ Guangxi Universityꎬ Nanning 530004ꎬ Chinaꎻ 2. Guangxi Key Laboratory of Sugarcane Genetic Improvementꎬ Guangxi Academy
of Agricultural Sciencesꎬ Nanning 530007ꎬ Chinaꎻ 3. Guangxi Fusui County Institute of Agricultural Sciencesꎬ Chongzuo 532199ꎬ
Guangxiꎬ Chinaꎻ 4. Guangxi Napo County Agriculture and rural Affairs Bureauꎬ Baise 533900ꎬ Guangxiꎬ China )
Abstract: To investigate the effects of different propagation methods on the structures and functions of endophytic
bacterial and fungi in ratoon cane rootsꎬ the ratoon cane roots were analyzed based on high ̄throughput sequencing
technology. In this studyꎬ ratoon cane roots via tissue culture and conventional propagation methods were used as the
materials. Meanwhileꎬ the functions of bacterial and fungal communities were also predicted using PICRUSt and
FUNGuild softwaresꎬ respectively. The results were as follows: (1) The dominant endophytic microbial communities in
ratoon cane roots were different between conventional propagation and tissue culture propagation methods. (2) The
unique dominant endophytic bacterial genera in ratoon cane roots under the conventional propagation method included
Leifsoniaꎬ Phyllobacteriumꎬ norank _ f__ Micropepsaceaeꎬ Haliangiumꎬ Granulicellaꎬ Acidothermusꎬ norank _ f__
Acetobacteraceae and norank_f__Magnetospirillaceaeꎻ meanwhileꎬ the unique dominant endophytic fungal genera were
Trechisporaꎬ Hypochniciumꎬ unclassified _ o__ Trechisporalesꎬ Mycenaꎬ Chaetosphaeriaꎬ Cladophialophora and
Trichoderma. (3) In the ratoon cane roots under the tissue culture propagation methodꎬ the unique dominant endophytic
bacterial genera included Ralstoniaꎬ Amycolatopsisꎬ unclassified _ f__ Pseudonocardiaceaeꎬ Devosiaꎬ Streptomycesꎬ
Lechevalieria and Kibdelosporangiumꎬ and the unique dominant endophytic fungal genera included unclassified _ f__
Marasmiaceaeꎬ unclassified _ k__ Fungiꎬ Penicilliumꎬ Sarocladiumꎬ unclassified _ c__ Agaricomycetes and Setophoma.
Compared with the conventional propagation methodꎬ the endophytic microbial compositions in ratoon cane roots could be
altered by the tissue culture propagation method. (4) The numbers of unique operational taxonomic units (OTUs) of
endophytic bacteria and fungi in ratoon cane roots under the tissue culture propagation method was greater than that
under the conventional propagation methodꎬ indicating higher endophytic microbial diversity and abundance. (5) The
functional prediction results showed that the functions of endophytic bacteria in ratoon cane roots were similar between
conventional and tissue culture propagation methodsꎬ howeverꎬ the endophyte ̄plant pathogen ̄undefined saprotroph group
of endophytic fungi was significantly enriched under tissue culture propagation method. In conclusionsꎬ endophytic
microbial community structures and functions in ratoon cane roots are affected by different propagation methods. All
above results also provide a theoretical basis for the subsequent screeningꎬ developmentꎬ and utilization of beneficial
functional microbial populations.
Key words: sugarcaneꎬ ratoon caneꎬ tissue cultureꎬ conventional propagationꎬ endophytic microorganisms
甘蔗( Saccharum officinarum) 是一年生或多年 侵染ꎬ使甘蔗体内多种病原菌逐渐积累ꎬ从而引起
生的宿根草本 C 植物ꎬ在热带、亚热带地区广泛栽 品种退 化ꎬ 给 生 产 造 成 极 大 的 损 失 ( 陈 荣 发 等ꎬ
4
培ꎬ在农产品加工领域占据重要地位ꎬ是我国最为 2021)ꎮ 植物组织培养技术作为一种革命性的无性
重要的糖料作物(廖艺等ꎬ2024)ꎮ 甘蔗属无性繁殖 繁殖手段ꎬ在甘蔗育种、脱毒快繁、种质资源保护和
作物ꎬ通常使用蔗茎、腋芽进行繁殖ꎬ其生长多年 生理 生 化 研 究 等 方 面 发 挥 着 重 要 作 用 ( 廖 艺ꎬ
后ꎬ容易受宿根矮化病、黑穗病等病原微生物反复 2024)ꎮ 长期使用常规的种茎种植方式会导致甘蔗

