Variable induction of cuticle-degrading enzymes of Beauveria bassiana isolates in the presence of different insect cuticles

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SEYEDTALEBI FARZANEH SADAT; SAFAVI SEYED ALI; TALAEI HASSANLOUI REZA; Bandani Alireza

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Journal: JOURNAL OF CROP PROTECTION Year:2020 | Volume:9 | Issue:4 Page(s): 563-576

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Title

Variable induction of cuticle-degrading enzymes of Beauveria bassiana isolates in the presence of different insect cuticles

Author(s)

SEYEDTALEBI FARZANEH SADAT | SAFAVI SEYED ALI | TALAEI HASSANLOUI REZA | Bandani Alireza | Issue Writer Certificate

Keywords

Beauveria bassianaQ2

cuticle-degrading enzymesQ1

virulenceQ1

histopathologyQ1

Abstract

In the present study, the cuticle-degrading enzymes production potential of five native Beauveria bassiana (TV, OZ, UN, DV and DE) isolates was investigated in the presence of cuticles from Eurygaster integriceps, Ephestia kuehniella and Zophobas morio. Furthermore, histopathology of infected insects by B. bassiana was studied. The level of cuticle degrading enzymes was the highest and lowest for TV (as the most virulent isolate) and DE (as the weakest isolate), respectively. E. integriceps nymphs as the most sensitive host produced the highest level of cuticle degrading enzymes (Pr2, exochitinase, and lipase) while Z. morio as the most resistant host, produced the lowest level of hydrolytic enzymes. According to histopathological study, the fungal isolate could not penetrate into Z. morio cuticle, as no mycelia or hyphae were observed in its tissues after inoculation, while fungal bodies were detected in microscopic slides of the other two insects. Overall, the chemical and topographical structure of insect cuticle had a substantial effect on the virulence of entomopathogenic fungus. Production of enzymes including proteases (especially Pr2), chitinase (N-acetyl-glucosaminidase), and lipases was positively related to virulence of fungus isolates. It can be concluded that not only the hydrolytic activity of B. bassiana isolates, but also host cuticle composition determine the pathogenesis and virulence cascade in fungusinsect interactions.

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APA: Copy

SEYEDTALEBI, FARZANEH SADAT, SAFAVI, SEYED ALI, TALAEI HASSANLOUI, REZA, & Bandani, Alireza. (2020). Variable induction of cuticle-degrading enzymes of Beauveria bassiana isolates in the presence of different insect cuticles. JOURNAL OF CROP PROTECTION, 9(4 ), 563-576. SID. https://sid.ir/paper/382744/en

Vancouver: Copy

SEYEDTALEBI FARZANEH SADAT, SAFAVI SEYED ALI, TALAEI HASSANLOUI REZA, Bandani Alireza. Variable induction of cuticle-degrading enzymes of Beauveria bassiana isolates in the presence of different insect cuticles. JOURNAL OF CROP PROTECTION[Internet]. 2020;9(4 ):563-576. Available from: https://sid.ir/paper/382744/en

IEEE: Copy

FARZANEH SADAT SEYEDTALEBI, SEYED ALI SAFAVI, REZA TALAEI HASSANLOUI, and Alireza Bandani, “Variable induction of cuticle-degrading enzymes of Beauveria bassiana isolates in the presence of different insect cuticles,” JOURNAL OF CROP PROTECTION, vol. 9, no. 4 , pp. 563–576, 2020, [Online]. Available: https://sid.ir/paper/382744/en

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