Recognition of potential beneficial fungi associated with rhizosphere of chontaduro (Bactris gasipaes H.B.K.) in the Pacific, Cauca Valley, Colombia

Acta Agronómica

Varón de Agudelo, Francia³  Sarria-Villa, Greicy A³  Gómez-Carabalí, Arnulfo¹  Riascos-Ortiz, Donald²  Mosquera-Espinosa, Ana T¹ 

[1] Universidad Nacional de Colombia, Palmira, Colombia;Universidad Nacional de Colombia, Bogotá, Bogotá, Colombia;Corporación Centro de Investigaciones en Palma de Aceite - CENIPALMA, Colombia

关键词: Buenaventura;    Fusarium;    humid tropics;    pejibaye;    Penicillium;    Rhizopus;    soil fungi;    Thielaviopsis;    Trichoderma;   

DOI  :  

学科分类：农业科学（综合）

来源: Universidad Nacional de Colombia * Facultad de Ciencias Agropecuarias Palmira

【 摘 要 】

The peach palm or chontaduro (Bactris gasipaes H.B.K.) is the principal crop of the rainforest agroecosytems of the Colombian Pacific coast. This region is poorly referenced in the scientific literature despite its high biodiversity and agroecological importance. The aim of this study was to isolate and identify up to the level of genus, fungi from the rhizosphere of B. gasipaes in two areas with different crop management, Citronela and Sabanetas, both in Valle del Cauca state. Roots and rhizospherical soil were sampled at three times of varying rainfall from 2006 to 2007. It is hypothesized that the size and diversity of the population of fungi are negatively influenced by rainfall, as this is the dominant climatic variable in the study region. Results showed that in Citronela populations of fungi were stable during the first two sampling, independent of rainfall between the sampling dates. In Sabaletas rainfall was higher than in Citronela, which was associated with anaerobic conditions in the rhizosphere that limited fungal growth. The third sampling had higher fungal populations and diversity of fungal genera at both sites, coinciding with the period of high rainfall and palm fruit production, conditions which favor the liberation of exudates from the roots. These factors could have favored secretion of root exudates which in turn could favor the growth of beneficial microorganisms in the rhizosphere. The genera of fungi isolated were: Trichoderma in both sites, Fusarium and Rhizopus in Citronela only, and Penicillium y Thielaviopsis in Sabaletas only. These fungi could be beneficial and useful in programs of integrated pest management for palm peach production. The results could thus serve as a base for future studies in the Pacific region.

【 授权许可】

Unknown