Data/hora: 11/06/2024 12:17:22

Provedor de dados: 	21	
País: 	Germany	
Título: 	Rhizospheric changes of fungal and bacterial communities in relation to soil health of multi-generation apple orchards	
Autores: 	Caputo, F.; Nicoletti , F.; De Luca Picione , F.; Manici, L.	
Data: 	2015-09	
Ano: 	2015	
Palavras-chave: 	Fruit and berries Crop health; Quality; Protection.	
Resumo: 	The study focused on changes of rhizosphere microbial communities in apple trees in long-term replanted orchards of Central Europe, aiming at developing cropping practices to mitigate replant problems. It started from the evidence of a previous study which showed that a slight modification  of root-colonizing fungal communities was responsible for a great increase of plant growth in soil samples which had previously been subjected to a gamma-irradiation cycle (25 kGy for 8 h), as compared to that observed in the corresponding untreated native soils.  The study was performed on rhizospheric soil from nine multi-generation apple orchards after a plant growth assay with M9 rootstock plantlets. PCR-DGGE analysis of soil DNA was performed to evaluate fungal and bacterial communities in fallow and replanted soils, as well as corresponding  gamma-irradiated samples. Findings showed that rhizospheric fungal and bacterial communities within apple orchards did not differ according to their position within the orchard; while, they showed a shift in the gamma-irradiated soils. Pseudomonas fluorescens, Pseudomonas tolasii, Pseudomonas spp. and Novosphingobium spp. were the bacteria which were mainly attributed to this change. A shifting in composition of Fusarium communities toward F. oxysporum and F. equiseti resulted the most linked to the changes at rhizosphere level after re-colonization; to the contrary, F. venenatum and F. venaceum, Truncatella sp. and Gibellulopsis sp., only occurred in native soils. Findings of this study suggest that disturbance events such as a gamma-irradiation can  modify microbial communities in long-term apple orchards thus allowing a soil re-colonization suitable to increase soil suppressiveness.	
Tipo: 	Journal paper	
Identificador: 	http://orgprints.org/28774/1/Biological_Control_Caputo%20et%20al.pdf

Caputo, F.; Nicoletti , F.; De Luca Picione , F.  and Manici, L.   (2015) Rhizospheric changes of fungal and bacterial communities in relation to soil health of multi-generation apple orchards.   Biological Control, 88, pp. 8-17.	
Relação: 	http://orgprints.org/28774/	
Formato: 	application/pdf