Fungos micorrízicos arbusculares (FMA) colonizando folhas da serapilheira de Mata Atlântica
Arbuscular mycorrhizal fungi (AMF) are known for establishing obligate symbiosis with most plant roots, increasing nutrient uptake for their hosts. Therefore, AMF are understood to be dependent on roots to complete their life cycle. However, studies have shown the occurrence of these fungi in litter...
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| Formato: | bachelorThesis |
| Idioma: | pt_BR |
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Universidade Federal do Rio Grande do Norte
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| Endereço do item: | https://repositorio.ufrn.br/handle/123456789/56276 |
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| Resumo: | Arbuscular mycorrhizal fungi (AMF) are known for establishing obligate symbiosis with most plant roots, increasing nutrient uptake for their hosts. Therefore, AMF are understood to be dependent on roots to complete their life cycle. However, studies have shown the occurrence of these fungi in litter. It is still not known what mechanisms these fungi play in litter and the species that inhabit this environment are also not known. Therefore, the objective was to investigate the occurrence and colonization of AMF in the litter of a tropical rainforest area in Rio Grande do Norte, Brazil.For this, 30 leaves of four species, Anacardium occidentale, Ziziphus joazeiro, Trichilia hirta, and Hirtella sp., were placed in litter bags in the Bonfim-Guaraíra APA, RN, Brazil. The leaves decomposed for up to three months. In the laboratory, slides were mounted for microscopy. Typical AMF structures colonizing the plant tissue were identified. Hirtella sp. showed the highest percentage of colonization, while A. occidentale showed the lowest percentage of colonization. The decomposition period significantly influenced the colonization rate of litter by AMF, with the three-month period having the greatest influence on detritus colonization (60%). Spores resembling Rhizoglomus were identified colonizing Hirtella sp. This research is the first study to identify the genus Rhizoglomus colonizing litter in Brazil. These results expand the records of AMF colonization in litter, being the first study in Brazil to characterize the colonization of litter by AMF. |
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