The immune response of Locusta migratoria manilensis at different times of infection with Paranosema locustae

Author:

Liu Hui12ORCID,Wei Xiaojia12ORCID,Ye Xiaofang12ORCID,Zhang Huihui12ORCID,Yang Kun3ORCID,Shi Wangpen4ORCID,Zhang Jinrui12ORCID,Jashenko Roman5ORCID,Ji Rong12ORCID,Hu Hongxia12ORCID

Affiliation:

1. Xinjiang Key Laboratory of Special Species Conservation and Regulatory Biology, International Research Center of Cross‐Border Pest Management in Central Asia, College of Life Sciences Xinjiang Normal University Urumqi Xinjiang People's Republic of China

2. Tacheng, Research Field (Migratory Biology) Observation and Research Station of Xinjiang Xinjiang People's Republic of China

3. Central for Prevention and Control of Prediction & Forecast Prevention of Locust and Rodent in Xinjiang Uygur Autonomous Region Xinjiang People's Republic of China

4. College of Plant Protection China Agricultural University Beijing People's Republic of China

5. Institute of Zoology RK93 Al‐Farabi Ave. Almaty Republic of Kazakhstan

Abstract

AbstractParanosema locustae is an entomopathogenic microsporidia with promising potential for controlling agricultural pests, including Locusta migratoria manilensis. However, it has the disadvantage of having a slow insecticidal rate, and how P. locustae infection impacts the host immune response is currently unknown. The present study investigated the effect of P. locustae on the natural immune response of L. migratoria and the activities of enzymes that protect against oxidative stress. Infection with P. locustae increased the hemocytes and nodulation number of L. migratoria at the initial stage of infection. The hemocyte‐mediated modulation of immune response was also affected by a decrease in the number of hemocytes 12 days postinfection. Superoxide dismutase activity in locusts increased in the early stages of infection but decreased in the later stages, whereas the activities of peroxidase (POD) and catalase (CAT) showed opposite trends may be due to their different mechanisms of action. Furthermore, the transcription levels of mRNA of antimicrobial peptide‐related genes and phenoloxidase activity in hemolymph in L. migratoria were suppressed within 15 days of P. locustae infection. Overall, our data suggest that P. locustae create a conducive environment for its own proliferation in the host by disrupting the immune defense against it. These findings provide useful information for the potential application of P. locustae as a biocontrol agent.

Publisher

Wiley

Subject

Insect Science,General Medicine,Biochemistry,Physiology

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