Gut passage of epigeous ectomycorrhizal fungi by two opportunistic mycophagous rodents  

作　　者：Citlalli CASTILLO-GUEVARAl Josette SIERRA Gema GALINDO-FLORES Mariana CUAUTLE Carlos LARA 

机构地区：[1]Centro de Investigacion en Ciencias Biologicas, Universidad Autonoma de Tlaxcala, Km 10.5 Autopista Tlaxcala-San Martin Texmelucan San Felipe Ixtacuixtla, Tlaxcala 90120, Mexico [2]Departamento de Quimica y Biologfa, Universidad de las Americas-Puebla, Ex-hacienda Sta, Catarina Martir s/n, Cholula, Puebla 72810, Mexico [3]Centro Tlaxcala de Biologia de la Conducta, Universidad Autdnoma de Tlaxcala-UNAM, Carretera Tlaxcala-Puebla, Km 1.5 s/n Tlaxcala, Tlaxcala 90070, Mexico

出　　处：《Current Zoology》2011年第3期293-299,共7页动物学报（英文版）

摘　　要：Mycophagists can influence fungal diversity within their home ranges by ensuring the continued and effective dispersal of spores from one site to another. However, the passage of spores through the digestive tract of vertebrates can affect the activity and viability of the spores ingested. This phenomenon has been rarely documented in opportunistic mycophagists consuming epigeous fungi. Using laboratory experiments, we investigated the activity and viability of spores of two epigeous ectomycorrhizal fungal species （Laccaria trichodermophora and SuiUus tomentosus） after passage through the digestive tract of two opportunistic mycophagous small rodents, the volcano mouse Peromyscus alstoni and the deer mouse P maniculatus. We found that passage through the gut of either species of rodent had a significant effect on spore activity and viability for both fungal species. The proportion of active spores （0.37-0.40） of L. trichodermophora in the feces of both species of rodents was less than that recorded for the control （0.82）. However, the proportion of active spores （0.644）.73） of S. tomentosus in the feces of each species of rodent was higher than in the control （0.40）. On the other hand, the viability of spores was lower （0.26-0.30 in L. trichodermophora and 0.604）.69 in S. tomentosus） for both fungi when consumed by either rodent relative to the controls （0.90 in L. trichodermophora and 0.82 in S. tomentosus）. These findings suggest that these rodent species may be effective dispersers of both epigeous fungi [Current Zoology 57 （3）： 293-299, 2011].

关 键 词：Gut passage Epigeous ectomycorrhizal fungi Mexico Spore activity and viability PEROMYSCUS 

分 类 号：S718.81[农业科学—林学] Q959.837[生物学—动物学]