广寄生侵染广宁红花油茶过程的组织解剖学观察  

Histoanatomical observation on the process of Taxillus chinensis infecting Camellia semiserrata

作　　者：练涛 郭业先 田龙艳 柳军 徐金柱[1] 杨华[1] 邱华龙[1] 秦长生[1] LIAN Tao;GUO Yexian;TIAN Longyan;LIU Jun;XU Jinzhu;YANG Hua;QIU Hualong;QIN Changsheng(Guangdong Provincial Key Laboratory of Silviculture,Protection and Utilization,Guangdong Academy of Forestry,Guangzhou 510520,China;Zhangmutou Forest Farm,Guangdong Province,Dongguan 523003,China)

机构地区：[1]广东省林业科学研究院,广东省森林培育与保护利用重点实验室,广州510520 [2]广东省樟木头林场,东莞523003

出　　处：《植物保护》2024年第2期64-72,共9页Plant Protection

基　　金：广东省林业科技创新项目(2019KJCX025)。

摘　　要：本研究通过石蜡切片和显微观察,从组织解剖学水平观察了广寄生Taxillus chinensis侵入广宁红花油茶Camellia semiserrata的过程。结果表明:广寄生侵入寄主有2种形式,一种是种子侵入,另一种是缠绕根侵入。种子侵入主要是通过自身分泌的胶状物质在寄主细胞间流动并包裹寄主细胞,随后降解寄主细胞形成多个微小的囊状结构,同时寄主形成愈伤组织,逐渐将广寄生种子包裹到体内。缠绕根侵入则是通过“膨胀螺丝结构”将寄主皮层撑开,同时吸根组织不断分泌胶状物质进入寄主组织降解寄主细胞,并逐渐生长进入寄主体内。本研究为进一步揭示广寄生的致病机制具有一定的参考意义。Process of Taxillus chinensis invading into Camellia semiserrata was observed at the level of histological anatomy by paraffin section and microscopic observation.The results showed that there were two invasion forms of T.chinensis,one way to invade is through seeds,and the other way is through twining root.T.chinensis seeds invade into the host mainly by self-secreted colloidal substances flowing between host cells and wrapping them,and then degrading the host cells to form a number of tiny sacs,at the same time,the host will form callus to gradually wrap the parasitical seeds into the body.Twining roots invaded into the host by spreading the host cortex through the“expansion screw structure”,the sucker tissue continuously secretes colloidal substances into the host tissue and degrades the host cells,and the sucker gradually grows into the host body.This study has certain reference significance for further revealing the pathogenic mechanism of T.chinensis.

关 键 词：广寄生 广宁红花油茶 侵染 吸根 组织解剖 

分 类 号：S794.4[农业科学—林木遗传育种] S765.5[农业科学—林学]