Nursery soil cover influences germination of Thujopsis dolabrata var. hondai seeds

Authors: Yamaji, Keiko; Mori, Shigeta

Source: Journal of Forest Research, Volume 11, Number 6, December 2006 , pp. 467-470(4)

Publisher: Springer

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We examined the influence of nursery soil cover on germination of Thujopsis dolabrata var. hondai. Seeds were sown under seeding bed conditions: (1) nursery soil (andosol) without soil cover, (2) Kanuma pumice without soil cover, (3) nursery soil with nursery soil cover, and (4) nursery soil with sterilized sand cover. Germination percentages were compared between these conditions. The germination percentage (8.8%) at 10 weeks after sowing under condition 3 was significantly lower than under conditions 1, 2, and 4 (56.8%, 52.0%, and 47.2%, respectively). Of the nongerminated seeds under condition 3, 75.0% were decayed and several fungi were isolated from decayed seeds. An inoculation test of isolated fungi Cylindrocarpon tenue, Cylindrocarpon sp., Fusarium oxysporum, and Botrytis sp. to seeds showed that these fungi caused seed decay. Our results indicated that nursery soil cover may not be suitable for T. dolabrata var. hondai seeds sown in nursery soil because of seed decay by pathogens.

Keywords: Germination percentage; Seed decay; Soil covering; Thujopsis dolabrata var. hondai

Document Type: Research Article


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Publication date: December 1, 2006

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