scholarly journals Development and Reproduction of the Mirid Bug, Cyrtorhinus lividipennis (Heteroptera : Miridae) and Its Functional Response to the Brown Planthopper

1985 ◽  
Vol 20 (4) ◽  
pp. 373-379 ◽  
Author(s):  
Annamalai SIVAPRAGASAM ◽  
Ahmad ASMA
Keyword(s):  
Functional Response ◽  
Brown Planthopper ◽  
Cyrtorhinus Lividipennis ◽  
Mirid Bug

scholarly journals The Amino Acid-Mediated TOR Pathway Regulates Reproductive Potential and Population Growth in Cyrtorhinus lividipennis Reuter (Hemiptera: Miridae)

2020 ◽  
Vol 11 ◽  
Author(s):  
Haowen Zhu ◽  
Sui Zheng ◽  
Jinming Xu ◽  
Qing Wu ◽  
Qisheng Song ◽  
...  
Keyword(s):  
Population Growth ◽  
Regulatory Mechanism ◽  
Brown Planthopper ◽  
Reproductive Potential ◽  
Tor Pathway ◽  
Cyrtorhinus Lividipennis ◽  
Mirid Bug ◽  
Predatory Mirid ◽  
Predatory Capacity ◽  
Gramineous Species

The predatory mirid bug, Cyrtorhinus lividipennis Reuter, feeds on brown planthopper (BPH) eggs that are deposited on rice and gramineous plants surrounding rice fields. The development and reproduction of C. lividipennis are inhibited by feeding on BPH eggs from gramineous species, and the underlining regulatory mechanism for this phenomenon is unclear. In the present study, HPLC-MS/MS analysis revealed that the concentrations of six amino acids (AAs:Ala, Arg, Ser, Lys, Thr, and Pro) were significantly higher in rice than in five gramineous species. When C. lividipennis fed on gramineous plants with BPH eggs, expression of several genes in the target of rapamycin (TOR) pathway (Rheb, TOR, and S6K) were significantly lower than that in the insects fed on rice plants with BPH eggs. Treatment of C. lividipennis females with rapamycin, dsRheb, dsTOR, or dsS6K caused a decrease in Rheb, TOR, and S6K expression, and these effects were partially rescued by the juvenile hormone (JH) analog, methoprene. Dietary dsTOR treatment significantly influenced a number of physiological parameters and resulted in impaired predatory capacity, fecundity, and population growth. This study indicates that these six AAs play an important role in the mediated-TOR pathway, which in turn regulates vitellogenin (Vg) synthesis, reproduction, and population growth in C. lividipennis.

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