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Master's Dissertation
DOI
https://doi.org/10.11606/D.11.1984.tde-20210918-202655
Document
Author
Full name
Wagner Bettiol
E-mail
Institute/School/College
Knowledge Area
Date of Defense
Published
Piracicaba, 1984
Supervisor
Title in Portuguese
Influência de algumas fontes de matéria orgânica na formação de ectomicorrizas em mudas de Pinus caribaea Morelet var. hondurensis Barret & Golfari pelos fungos Pisolithus tinctorius (Pers.) Coker & Couch e Thelephora terrestris Ehr. ex Fr.
Keywords in Portuguese
FUNGOS MICORRÍZICOS
MATÉRIA ORGÂNICA DO SOLO
MUDAS
PINHEIRO
Abstract in Portuguese
Foram avaliados os efeitos de lodo de esgoto, esterco de curral, torta de filtro e acículas de Pinus incorporados ao solo nas concentrações de 10, 30 e 50% (v/v) sobre a formação de ectomicorrizas em mudas de Pinus caribaea var. hondurensis inoculadas artificialmente com Pisolithus tinctorius e Thelephora terrestris. Foi também avaliado o efeito do extrato destas matérias orgânicas, nas concentrações 1, 10, 100 e 1.000 ppm, 1, 2, 3, 4, 5, 10, 15 e 20% em MMN agar (meio de Melin-Norkrans, modificado por Marx), sobre o crescimento micelial de P. tinctorius e T. terrestris. O esterco de curral e as acículas de Pinus na concentração 10% não afetaram a formação de micorrizas, tanto por P. tinctorius quanto por T. terrestris, enquanto que as concentrações 30 e 50% reduziram a simbiose. Lodo de esgoto em todas as concentrações inibiu a formação de micorrizas por ambos os fungos. Torta de filtro inibiu a associação das mudas de P. caribaea var. hondurensis com T. terrestris em todas as concentrações e nas de 30 e 50% para P. tinctorius. Concentrações acima de 1 % de lodo de esgoto e acículas de Pinus reduziram o crescimento micelial de P. tinctorius. Para T. terrestris a inibição tornou-se significativa acima de 4% de lodo de esgoto e 1% de acículas de Pinus. Torta de filtro e esterco de curral inibiram o desenvolvimento de T. terrestris em concentrações superiores a 5%, enquanto para P. tinctorius a torta não acarretou inibição e o esterco a fez com 20% de extrato. Ocorreu uma redução na sobrevivência dos fungos no solo com a aplicação de matéria orgânica.
Title in English
Influence of some sources of organic matter on the formation of ectomycorrhizae by Pisolithus tinctorius (Pers.) Coker & Couch ano Thelephora terrestris Ehr. Ex Fr. with Pinus caribaea Morelet var. hondurensis Barret & Golfari seedlings
Abstract in English
The effects of sewage sludge, manure, filter cake and pine needle mulch, incorporated in the soil at the concentrations of, 10, 30 and 50% (v/v) on the formation of ectomycorrhizae by Pisolithus tinctorius and Thelephora terrestris with Pinus caribaea var. hondurensis seedlings were evaluated. The effects of the extracts of these organic matters incorporated in MMN agar (Melin-Norkrans nutrient medium modified by Marx) at the concentrations of 1, 10, 100 and 1,000 ppm and 1, 2, 3, 4, 5, 10, 15 and 20% on the mycelial growth of both ectomycorrhizal fungi were also investigated. Manure and pine mulch, at the concentration of 10% did not effect the formation of mycorrhizae by P. tinctorius and T. terrestris, while at the higher concentrations they reduced the amount of mycorrhizae formed by both fungi. Filter cake inhibited the formation of mycorrhizae by T. terrestris at all concentrations, whereas for P. tinctorius it affected only at 30 and 50%. Sewage sludge had the strongest inhibitory effect, acting at all concentrations tested against both fungi. With respect to the mycelial growth, inhibition was also detected, the levels of effects depending on the concentration of the extracts and the fungi tested. In general, the inhibitory effects occurred at extract concentrations above 1%. Filter cake did not affect the growth of P. tinctorius at all concentrations tested. Survival of both fungi in the soil was reduced by the incorporation of organic matter.
 
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Publishing Date
2021-09-18
 
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