Endophytic entomopathogenic fungi enhance the growth of Phaseolus vulgaris L. (Fabaceae) and negatively affect the development and reproduction of Tetranychus urticae Koch (Acari: Tetranychidae). (December 2018)

• Record Type: Journal Article
• Authors: Dash, Chandra Kanta; Bamisile, Bamisope Steve; Keppanan, Ravindran; Qasim, Muhammad; Lin, Yongwen; Islam, Saif Ul; Hussain, Mubasher; Wang, Liande
• Is Part Of: Microbial pathogenesis. Volume 125(2018)
• Page Start: 385
• Page End: 392
• Publication Date: 2018-12
• Subjects: Fungal endophytes -- Colonization -- Beauveria bassiana -- Isaria fumosorosea -- Lecanicillium lecanii -- Biological control -- Two-spotted spider mites; Pathogenic microorganisms -- Periodicals; Pathology, Molecular -- Periodicals; Communicable Diseases -- microbiology -- Periodicals; Communicable Diseases -- parasitology -- Periodicals; Micro-organismes pathogènes -- Périodiques; Pathologie moléculaire -- Périodiques; Electronic journals; 616.9041
• DOI: 10.1016/j.micpath.2018.09.044
• Languages: English
• ISSNs: 0882-4010

Abstract

Abstract: Entomopathogenic fungi (EPF) have primarily been applied as an inundative approach to manage pests. However, in recent decade multifunctional role of EPF have been documented which provide multiple benefits to host plants when colonized as an endophyte. In this study five fungal isolates from the genus Beauveria (three), Isaria (one) and Lecanicillium (one) were evaluated for their ability to colonize common bean, Phaseolus vulgaris and to assess their effects in planta on plant growth promotion and possible negative effects on the two-spotted spider mites, Tetranychus urticae . All the tested isolates in this study were able to endophytically colonize root, stem and even leaves of inoculated plants examined at 7 and 14 days post inoculation, indicating the systemic colonization of EPF. Colonized plants showed increased plant heights, fresh shoot and root weights compared to plants without inoculation. Survivorship of T. urticae significantly differed among the treatments with higher survival probability in control plants. Significant reduction in larval development, adult longevity and female fecundity of spider mites were observed when fed on treated plants compared to control plants. The negative effects were found to be carried over the second generation fed on fresh plants. Overall, our results show (i) the positive effects of fungal endophytes on plant growth, (ii) reduction in population growth rate and (iii) negative effects of endophytes on growth and reproduction of spider mites in successive generations. The study presents reports on the endophytic management of plant-feeding mites and highlights the possibility of utilizing entomopathogenic fungal endophytes in the integrated pest management program. Graphical abstract: Highlights: Entomopathogenic fungi successfully colonized Phaseolus vulgaris. Endophytic B. bassiana, I. fumosorosea and L. lecanii enhanced common bean growth. Fungal endophytes reduced longevity, fecundity and delayed larval development. Fungal endophytes have the potential to manage plant-feeding spider mites.