A functional interpretation of the role of the reticuloperidium in whole-ascoma dispersal by arthropods

被引:13
作者
Greif, MD [1 ]
Currah, RS [1 ]
机构
[1] Univ Alberta, Dept Biol Sci, Edmonton, AB T6G 2E9, Canada
来源
MYCOLOGICAL RESEARCH | 2003年 / 107卷
基金
加拿大自然科学与工程研究理事会;
关键词
D O I
10.1017/S0953756202007104
中图分类号
Q93 [微生物学];
学科分类号
071005 ; 100705 ;
摘要
Auxarthron conjugatum (Onygenaceae) and Myxotrichum deflexum (Myxotrichaceae) are distantly related cleistothecial (gymnothecial) ascomycetes that form ascomata with strikingly similar peridia in which rigid, branched and anastomosed, thick-walled hyphae create a cage- or mesh-like enclosure (reticuloperidium). We tested the hypothesis that the reticuloperidium plays a role in dispersal mediated by arthropods by enclosing ascomata of these fungi together with flies from the family Sarcophagidae. Gymnothecia of both fungi were picked up easily when the stiff hairs of the flies impaled the ascomata by passing through the interhyphal spaces of the reticuloperidium. Ascospore release from the gymnothecia then occurred during grooming activities during which the limbs of the flies caught the ascoma appendages causing the peridium to be torn apart. This adaptation to arthropod morphology and behaviour is interpreted as the driving force behind the evolution of reticuloperidia, in unrelated groups of cleistothecial ascomycetes.
引用
收藏
页码:77 / 81
页数:5
相关论文
共 14 条
[11]  
Sugiyama Masato, 2001, Mycoscience, V42, P413, DOI 10.1007/BF02464337
[12]  
Sugiyama Masato, 1999, Mycoscience, V40, P251, DOI 10.1007/BF02463962
[13]  
Summerbell R. C., 2000, Biology of dermatophytes and other keratinophilic fungi, P30
[14]  
Tavares I.I., 1985, MYCOL MEM, V9, P1