Genet distribution of sporocarps and ectomycorrhizas of Suillus pictus in a Japanese white pine plantation

doi:10.1111/j.1469-8137.2004.01188.x

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Wiley InterScience

New Phytologist

Volume 164 Issue 3, Pages 527 - 541

Published Online: 14 Oct 2004

Published on behalf of the New Phytologist Trust

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Genet distribution of sporocarps and ectomycorrhizas of Suillus pictus in a Japanese white pine plantation

Dai Hirose ^1,2 , Junichi Kikuchi ^3,4 , Natsumi Kanzaki ¹ and Kazuyoshi Futai ¹

¹ Laboratory of Environmental Mycoscience, Graduate School of Agriculture, Kyoto University, Sakyo-ku, Kyoto 606–8502, Japan; ² Present address: Sugadaira Montane Research Center, University of Tsukuba, Sugadaira, Nagano 386–2201, Japan; ³ Osaka Museum of Natural History, 1–23 Nagaikoen, Higashisumiyoshi-ku, Osaka 546–0034, Japan; ⁴ Present address: Science Education, Nara University of Education, Takabatake-cho, Nara 630–8528, Japan

Author for correspondence: Dai Hirose Tel: +81 268 74 2002 Fax: +81 268 74 2016 Email: daihiro@sugadaira.tsukuba.ac.jp

KEYWORDS

biomass • ectomycorrhiza • genet distribution • ISSR (inter-simple sequence repeat) • Pinus pentaphylla var. himekomatsu • Suillus pictus

New Phytologist (2004) doi: 10.1111/j.1469-8137.2004.01188.x

©New Phytologist (2004)

Summary

•
Spatial distribution and biomass of genets of sporocarps and ectomycorrhizas of Suillus pictus were studied in a plot of 20 × 24 m established in a Pinus pentaphylla var. himekomatsu plantation.
•
The biomass of S. pictus ectomycorrhizas was evaluated based on morphotypes, and genets were identified based on the inter-simple sequence repeat (ISSR) polymorphism analysis.
•
Suillus pictus was one of the dominant ectomycorrhizal fungal species in both the sporocarp and ectomycorrhizal communities in the study plot. Four genets were identified from sporocarps and these coincided with those identified from ectomycorrhizas. Sporocarps of each S. pictus genet occurred separately from those of other genets. Spatial distributions of ectomycorrhizas of each genet were wider than those of sporocarps. The largest genet occupied c. 54% of the plot, and the area of each genet differed considerably.
•
Vegetative growth of mycelia is assumed to play a more important role in the propagation of S. pictus than colonization from spores because expansions of all the four genets ranged from 25 to 30 m and no small genets were found in this plot.