摘要
显脉松寄生(Taxillus caloreas var.fargesii)是桑寄生科(Loranthaceae)半寄生性多年生种子植物,是滇中地区云南油杉林毁灭性的生物灾害之一.为了解滇中地区云南油杉林显脉松寄生与重寄生的发生情况,研究通过样地调查法,评估其感染危害程度,同时基于形态学特征与多位点序列分析(MLSA)进行种类鉴定.结果表明,云南油杉的寄生性种子植物为显脉钝果寄生的变种显脉松寄生(Taxillus caloreas var.fargesii),重寄生植物为硬序重寄生(Phacellaria rigidula),是一类寄生于桑寄生科的亚灌木.显脉松寄生对云南油杉危害严重,寄生率达64%,重寄生率为56%.重寄生发生严重的样地云南油杉桑寄生害的病情指数为26.7,而重寄生发生较少的样地病情指数高达58.4.研究首次报道了滇中地区显脉松寄生在自然条件下具有重寄生的现象,硬序重寄生在一定程度上能控制显脉松寄生的蔓延.作为一种自然的生物控制因子,硬序重寄生在桑寄生害的防治上具有重要意义.
Taxillus caloreas var.fargesii,a semi parasitic perennial seed plant of Loranthaceae,is one of the devastating biological disasters in the forest of Keteleeria evelyniana in Central Yunnan.For a comprehensive understanding of the occurrence of the parasitic and hyperparasitism,the degree of infection damage was evaluated through plot investigation,and the species were identified with morphological characteristics and multilocus sequence analysis(MLSA)methods.The results showed that the parasitic plant of K.evelyniana was T.caloreas var.fargesii,and the hyperparasitic plant was Phacellaria rigidula,which is a kind of subshrub parasitic of Loranthaceae.T.caloreas var.fargesii is very harmful to K.evelyniana,the infection rate was 64%,and the rate of parasitism was 56%.In addition,the disease index of K.evelyniana was 26.7 in severe hyperparasitism,and 58.4 in less hyperparasitism.This study reported for the first time that hyperparasitism occurred on T.caloreas var.fargesii in the K.evelyniana forest in Central Yunnan,P.rigidula can control the spread of the T.caloreas var.fargesii to a certain extent.The P.rigidula is of great significance in the control of T.caloreas var.fargesii as a natural biological control.
作者
陈健鑫
魏玉倩
刘乐荷
孙会林
马焕成
伍建榕
CHEN Jian-xin;WEI Yu-qian;LIU Le-he;SUN Hui-lin;MA Huan-cheng;WU Jian-rong(Key Laboratory of Forest Disaster Warning and Control in Universities of Yunnan Province,Southwest Forestry University,Kunming 650224,Yunnan,China;Key Laboratory of Biodiversity Conservation in Southwest China,State Forestry Administration,Southwest Forestry University,Kunming 650224,Yunnan,China;Zhehai Forest Farm of Huize County,Huize 655000,Yunnan,China)
出处
《云南大学学报（自然科学版）》
CAS
CSCD
北大核心
2022年第6期1288-1296,共9页
Journal of Yunnan University(Natural Sciences Edition)
基金
国家自然科学基金(31860208,31560207)
西南林业大学木棉纤维人工林产业化培育省级创新团队项目(2018HC014).
关键词
滇中
云南油杉
显脉松寄生
硬序重寄生
多位点序列分析(MLSA)
Central Yunnan
Keteleeria evelyniana
Taxillus caloreas var.fargesii
Phacellaria rigidula
multilocus sequence analysis(MLSA)
