The present work aims to verify whether Pisolithus arhizus (Persoon) Rauschert and Scleroderma verrucosum (Bull.: Pers.) Pers. compete for mycorrhization with other Tuber species in the soil. In spring 2004 some seedlings of Quercus pubescens Willd. were inoculated with P. arhizus and S. verrucosum alone and/or with different species of Tuber (T. melanosporum Vittad., T. aestivum Vittad., T. borchii Vittad., T. brumale Vittad.) and in all possible combinations. 17 different test inoculums were inoculated in the same conditions and using the same quantity of inoculating material. Two types of substrates were used to raise the plants: natural (natural soil and sand) and artificial (agriperlite, vermiculite and peat). In fall 2004, spring 2005 and spring 2006, the percentage of mycorrhization for each of the species of fungi involved was assessed in 32% of the plants for each test inoculum. Root tips were counted and percentages were calculated for mycorrhizae of each species. The presence of mycorrhizae was quite low some months after inoculation, especially in the artificial substrate (To). In 2005 and 2006 almost all test inoculums were mycorrhized, mainly with Tuber species, in both the natural and artificial substrates. P. arhizus shows a positive trend during three years in To, whereas in Te the opposite occurs. The presence of S. verrucosum was low and constant at 7.7%, but it doubled in To during the last analysis (2006); the two species are not, therefore, very competitive.
Competition between Pisolithus arhizus (Scop.) Rauschert and Scleroderma verrucosum (Bull.) Pers. and different species of Tuber
DONNINI, Domizia;BACIARELLI FALINI, Leonardo;DI MASSIMO, Gabriella;BENUCCI, GIAN MARIA NICCOLO';BENCIVENGA, Mattia
2010
Abstract
The present work aims to verify whether Pisolithus arhizus (Persoon) Rauschert and Scleroderma verrucosum (Bull.: Pers.) Pers. compete for mycorrhization with other Tuber species in the soil. In spring 2004 some seedlings of Quercus pubescens Willd. were inoculated with P. arhizus and S. verrucosum alone and/or with different species of Tuber (T. melanosporum Vittad., T. aestivum Vittad., T. borchii Vittad., T. brumale Vittad.) and in all possible combinations. 17 different test inoculums were inoculated in the same conditions and using the same quantity of inoculating material. Two types of substrates were used to raise the plants: natural (natural soil and sand) and artificial (agriperlite, vermiculite and peat). In fall 2004, spring 2005 and spring 2006, the percentage of mycorrhization for each of the species of fungi involved was assessed in 32% of the plants for each test inoculum. Root tips were counted and percentages were calculated for mycorrhizae of each species. The presence of mycorrhizae was quite low some months after inoculation, especially in the artificial substrate (To). In 2005 and 2006 almost all test inoculums were mycorrhized, mainly with Tuber species, in both the natural and artificial substrates. P. arhizus shows a positive trend during three years in To, whereas in Te the opposite occurs. The presence of S. verrucosum was low and constant at 7.7%, but it doubled in To during the last analysis (2006); the two species are not, therefore, very competitive.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
