Aspectos do desenvolvimento em feijão comum (Phaseolus vulgaris L.) inoculados com Trichoderma spp.
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Data
2014-03-31
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Universidade Federal de Goiás
Resumo
Fungi of the genus Trichodermaspp. can be used as biological control agents and also as inducer
of growth in different plants. Its action is based on different mechanisms such as the production
of secondary metabolites, competition for space and nutrients, production of hydrolytic enzymes
and signaling molecules. However, only a few works were made about morphological and
anatomical aspects of the interaction between Trichodermaspp. and plants. This project aims to
watch and determine the effects of inoculation of Trichoderma harzianum(ALL42 and T22) and
Trichoderma asperellum(T34) strains in morphological and anatomical aspects of the bean
(Phaseolus vulgarisL.). Morphological parameters as size of the root, root volume, dry mass and
leaf area were analyzed, and some anatomical parameters like quantitative analysis of mesophile
thickness leaf epidermis in stages V2, V4, R5, R7and R8, and the alteration of the structural
characteristics of the root in stages V2, V4 and R5. The treatments were performed in seeds free
from inoculation with Trichodermaspp. (control) and seeds treated with Trichodermaspp. T 22,
ALL42 and T34 with three replicates each, totaling twelve treatments for stage analyzed.
Statistical analysis was performed by ANOVA analysis of variance and separation of means test.
The obtained data suggest that changes occurred inthe biomass of the dried plant, leaf area,
length and volume of the root in most of the analyzed stages. However, in thickness of
mesophyle analyse, significant differences was found only in stages V4 and R7. It was observed
that the treated samples showed a greater Trichodermaspp. secondary cylinder vascular growth
of roots, mainly in V4 stage. Was observed in R5 stage a further development of secondary
xylem in the vascular cylinder of roots when treated with Trichodermaspp.. These data suggest
that the fungus accelerates the development in P. vulgarisL. roots. Among the parameters
analyzed, isolates of T. harzianum(ALL42 and T22) was those who shows a bigger difference
when compared with the control.
Descrição
Palavras-chave
Trichoderma , Feijoeiro , Folha , Raiz , Indutor de crescimento , Trichoderma , Bean , Leaf , Root , Growth inducer
Citação
MOREIRA, Suya Samara. Aspectos do desenvolvimento em feijão comum (Phaseolus vulgaris L.) inoculados com Trichoderma spp.. 2014. 82 f. Dissertação (Mestrado em Biodiversidade Vegetal) - Universidade Federal de Goiás, Goiânia, 2014.