日本菟丝子对寄主的选择行为

应用生态学报 ›› 2005, Vol. 16 ›› Issue (2): 323-327.

日本菟丝子对寄主的选择行为

胡飞¹, 孔垂华^1,2, 张朝贤³, 梁文举², 王朋²

1. 华南农业大学热带亚热带生态研究所, 广州, 510642;
2. 中国科学院沈阳应用生态研究所, 沈阳, 110016;
3. 中国农业科学院植物保护研究所, 北京, 100094

收稿日期:2003-12-24 修回日期:2004-03-09 出版日期:2005-02-15 发布日期:2005-02-15
通讯作者: 胡飞,男,1966年生,副教授.主要从事植物生态学研究,发表论文40多篇,参编著作3部.Tel:86-20-85280204;Email:hufei@mail.edu.cn.
基金资助:
国家自然科学基金项目(30170182,30470192)和国家"十五"科技重点攻关计划资助项目(2001BA509B07).

Selection behavior of Cuscuta japonica on their hosts

HU Fei¹, KONG Chuihua^1,2, ZHANG Chaoxian³, LIANG Wenju², WANG Peng ²

1. Institute of Tropical and Subtropical Ecology, South China Agricultural University, Guangzhou 510642, China;
2. Institute of Applied Ecology, Chinese Academy of Sciences, Shenyang 110016, China;
3. Institute of Plant Protection, Chinese Academy of Agricultural Sciences, Beijing 100094, China

Received:2003-12-24 Revised:2004-03-09 Online:2005-02-15 Published:2005-02-15

摘要/Abstract

摘要： 在野外对日本菟丝子(Cuscuta japonica)选择寄主的行为进行观察,结果表明,在所研究的植物群落中,日本菟丝子在不同寄主上发生缠绕的数量多少、发生吸器时间的先后和缠绕比率的大小顺序为:枸树、蟛蜞菊、五爪金龙和马缨丹,而从缠绕发生至吸器发生期间日本菟丝子生长点伸长量的大小顺序则相反,且差异显著.日本菟丝子生长点在与聚氯乙烯塑料(PVC)棒接触后24 h内发生明显的偏离,而在接触不同寄主后12 h内则发生左旋3圈缠绕.多寄主共存的群落比单一寄主群落对日本菟丝子及其寄主的生存均有利.日本菟丝子选择寄主的行为与不同寄主N的含量关系不明显,推测这种选择行为与不同寄主次生物质的差异有关.

关键词: 日本菟丝子, 寄生, 选择行为, 寄主N含量, 次生物质

Abstract: A field investigation on the selection behavior of Cuscuta japonica on their hosts showed that among the test plant communities,the number of coiling,the time of haustorium occurring,and the rate of coiling of C.japonica on hosts followed the order of B.papyrifera,W.chinensis,I.cairica,and L.camara; but the length of the elongation of C.japonica growing tips from coiling to haustorium occurring was with the order of L.camara,I.cairica,W.chinensis,and B.papyrifera.Furthermore,the growing tips of C.japonica coiled 3 circles in left direction on all selected hosts in 12 hrs,but grew away after contacting PVC rods within 24 hrs.The host diversity of C.japonic was beneficial to the survival of both C.japonica and its hosts.The selection behavior of C.japonica on their hosts had no correlation with the total N contents of different hosts.It could be postulated that the secondary metabolites of hosts made a contribution to the selection behavior of C.japonica on their hosts.

Key words: Cuscuta japonica, Parasitism, N content of hosts, Selection behavior, Secondary metabolites

中图分类号:

Q948.9

胡飞, 孔垂华, 张朝贤, 梁文举, 王朋. 日本菟丝子对寄主的选择行为[J]. 应用生态学报, 2005, 16(2): 323-327.

HU Fei, KONG Chuihua, ZHANG Chaoxian, LIANG Wenju, WANG Peng . Selection behavior of Cuscuta japonica on their hosts[J]. Chinese Journal of Applied Ecology, 2005, 16(2): 323-327.

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