Parapiptadenia rigida MYCORRHIZATION WITH SPORES OF Scleroderma citrinum
ABSTRACT Ectomycorrhizal fungal inoculation in forestry seedlings aids plant establishment and growth in the field. The objectives of this study were: to determine the mycorrhizal capacity of the ectomycorrhizal fungus Scleroderma citrinum in Parapiptadenia rigida (red angico) seedlings and to evalu...
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Veröffentlicht in: | CERNE 2017-06, Vol.23 (2), p.241-248 |
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Zusammenfassung: | ABSTRACT Ectomycorrhizal fungal inoculation in forestry seedlings aids plant establishment and growth in the field. The objectives of this study were: to determine the mycorrhizal capacity of the ectomycorrhizal fungus Scleroderma citrinum in Parapiptadenia rigida (red angico) seedlings and to evaluate the viability of a mycorrhizal inoculation technique for forest seedlings involving the use of spores. Mature spores were inoculated in the substrate (75% soil and 25% carbonized rice husk), totaling 1.5 grams of fungal spores per liter of substrate. P. rigida seeds were sown in substrates inoculated or not inoculated with fungal spores in presence or absence of Pinus echinata and Eucalyptus citriodora essential oil: not inoculated (T1), inoculated (T2), inoculated more pine essential oil (T3), inoculated more eucalyptus essential oil (T4). Seedlings of Pinus elliottii were used for a positive control of mycorrhizal inoculation (T5) and not inoculated (T6) with fungal spores. At 90 days after sowing, the base stem diameter, height, fresh and dry weight of shoots and roots, percentage of root colonization and Dickson Index were determined. The presence of fungal structures in P. rigida and P. elliottii roots inoculated with S. citrinum spores was observed, demonstrating the occurrence of an ectomycorrhizal association. The application of pine and eucalyptus essential oils in the substrate increased the percentage of ectomycorrhizal colonization in P. rigida seedlings. The addition of S. citrinum mature spores in the substrate used for seedling production is a viable practice for ectomycorrhizal inoculation and it can be used in forest nurseries in controlled mycorrhization programs.
RESUMO A inoculação de fungos ectomicorrízicos em mudas florestais beneficia o estabelecimento e crescimento das plantas no campo. Os objetivos do trabalho foram: determinar a capacidade de micorrização do fungo ectomicorrízico Scleroderma citrinum em mudas de Parapiptadenia rigida (angico-vermelho) e avaliar a viabilidade da técnica de inoculação micorrízica de mudas florestais através do uso de esporos. Esporos maduros foram inoculados ao substrato (75% solo e 25% casca de arroz carbonizada), totalizando 1,5 gramas de esporos de fungo por litro de substrato. Sementes de P. rigida foram semeadas em substratos inoculados ou não com esporos de S. citrinum, na presença ou ausência dos óleos essências de Pinus echinata e Eucalyptus citriodora: não inoculado (T1), inoculado (T2), inoc |
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ISSN: | 0104-7760 2317-6342 0104-7760 2317-6342 |
DOI: | 10.1590/01047760201723022342 |