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1.
Zootaxa ; 4786(4): zootaxa.4786.4.9, 2020 Jun 04.
Artigo em Inglês | MEDLINE | ID: mdl-33056466

RESUMO

The materials on the genus Vertagopus Börner from the Caucasus and Iran are revised. Two new species, V. persicus sp. nov. and V. nunataki sp. nov., are described and fauna of the genus in the Western Asia is commented.


Assuntos
Artrópodes , Distribuição Animal , Animais , Irã (Geográfico)
2.
Pestic Biochem Physiol ; 164: 85-90, 2020 Mar.
Artigo em Inglês | MEDLINE | ID: mdl-32284141

RESUMO

Pyridalyl is one of the recently discovered insecticides which has shown toxicity against several insect pests with slight- or non-lethal effects against natural enemies. Cytotoxicity and prevention of protein synthesis have been reported as pyridalyl mode of action. In the current study, adults of Bacterocera oleae, as a major pest of olive, were fed on protein hydrolysate diet containing LC50 concentration of pyridalyl to determine the possible mode of action through gene expression and amino acid profile. Results showed that treated flies had significantly higher gene expressions of cytochrome P450, insulin receptor-like, antioxidant enzymes (catalase, peroxidase, superoxide dismutase) and the enzymes involved in cell death; caspase1, caspase3, caspase8 and caspase9 compared to control. Moreover, determination of amino acid profile in the whole body of both control and pyridalyl-treated B. oleae revealed the significant higher amounts of glutamic acid, glutamine, histidine, threonine, citrulin, arginine, taurine, alanine, tyrosine, α-amino butric acid, methionine and isoleucine in the treated adults while the control flies had the higher amounts of serine, glycine and tryptophane. No significant differences were found in the amounts of asparagine and phenylalanine between control and treatments. These results are in accordance with earlier findings on mode of action of pyridalyl through activation of cytochrome P450 system and alterations in protein synthesis machinery although here other mechanisms were also reported including activation of insulin receptor and antioxidant enzymes. Moreover, it is the first report on cytotoxicity through apoptosis with engagement of caspases.


Assuntos
Inseticidas , Fenômenos Fisiológicos , Tephritidae , Animais , Éteres Fenílicos
3.
Arch Insect Biochem Physiol ; 101(1): e21543, 2019 May.
Artigo em Inglês | MEDLINE | ID: mdl-30854723

RESUMO

There is no study implying the effect of plant lectins on insect immune elements in both challenged and non-challenged conditions with entomopathogenic agents. Lectins may bind to immune receptors on the surface of insect hemocytes, thus inducing or even disabling common immune functions including hemocyte counts, nodulation/encapsulation, phenoloxidase activity, and synthesis of antimicrobial peptides. In the present study, effect of Polygonum persicaria L. agglutinin (PPA) on immune responses of Helicoverpa armigera Hübner was investigated by feeding artificial diet treated to the larvae. Subsequently hemocyte count and expression of some immune-related genes were considered for analyses. The two groups of larvae including control and PPA-treated (1%) were divided into four subgroups of intact, Tween-80 injected, latex-bead injected and Beauveria bassiana-injected. Except for intact larvae, the highest numbers of total and differential hemocyte counts were recorded 12 hr postinjection, however, the PPA-fed larvae showed a significantly lower hemocyte counts compared to control. The number of nodules in PPA-fed larvae was significantly lower than control, but the injected larvae of both control and PPA showed the highest nodulation 24 hr postinjection. Although the highest activity of phenoloxidase was observed 12 and 24 hr postinjection but its activity significantly decreased in PPA-fed larvae compared to control. Gene expression of antimicrobial peptides including attacin, cecropin, and peptidoglycan receptor proteins were significantly decreased in artificial diet-fed larvae containing PPA and then injected by B. bassiana spores and latex bead compared to control. These results clearly indicate adverse effects of PPA on immune responses in H. armigera.


Assuntos
Aglutininas/farmacologia , Hemócitos/efeitos dos fármacos , Mariposas/efeitos dos fármacos , Polygonum/toxicidade , Animais , Beauveria/imunologia , Dieta/efeitos adversos , Expressão Gênica , Hemócitos/imunologia , Proteínas de Insetos/genética , Proteínas de Insetos/metabolismo , Larva/efeitos dos fármacos , Larva/imunologia , Larva/microbiologia , Monofenol Mono-Oxigenase/metabolismo , Mariposas/imunologia , Mariposas/microbiologia
4.
J Econ Entomol ; 111(2): 662-671, 2018 04 02.
Artigo em Inglês | MEDLINE | ID: mdl-29385554

RESUMO

Plant lectins could reduce insect populations by imposing imbalances in biology and physiology. Here, an agglutinin was extracted from Polygonum persicaria L. (PPA; Polygonales: Polygonaceae) and its effects were investigated on life table parameters and antioxidant system of Helicoverpa armigera Hübner (Lepidoptera: Noctuidae). PPA significantly changed demographic parameters showing adverse effects on age-stage survival rate (Sxj), age-specific survival rate (lx), age-specific fecundity rate (mx), age stage specific fecundity (fxj), and life expectancy (exj). Also, life table parameters including net reproduction rate (R0) (Offspring/female), intrinsic rate of population increase (rm) (days-1), finite rate of increase (λ) (days-1), gross reproduction rate (GRR) (Offspring/female) significantly decreased in the PPA-treated H. armigera compared to control except for mean generation time (T) (days). Activities of antioxidant enzymes including superoxide dismutase (SOD), catalase (CA), peroxidase (POX), glutathione S-transferase (GST) and glucose 6-phosphate dehydrogenase (GPDH) increased statistically in the PPA-treated larvae compared to control while no significant difference was observed in the activity of ascorbate peroxidase (APOX) activity. Moreover, ratio of RSSR/RSH and concentration of malondialdehyde (MDA) were found to be statistically higher in PPA-treated larvae than control. The current results clearly showed that PPA not only had a negative impact on demography of H. armigera but also induced antioxidant raise by releasing free radicals. These released radicals, together with impaired digestion and absorption observed in our previous report, could be considered as a reason for reducing biological fitness of H. armigera.


Assuntos
Larva/efeitos dos fármacos , Mariposas/efeitos dos fármacos , Lectinas de Plantas/toxicidade , Polygonum/química , Animais , Antioxidantes/metabolismo , Feminino , Larva/metabolismo , Tábuas de Vida , Masculino , Mariposas/metabolismo , Lectinas de Plantas/isolamento & purificação
5.
Zootaxa ; 3847(4): 533-44, 2014 Aug 11.
Artigo em Inglês | MEDLINE | ID: mdl-25112356

RESUMO

This paper reports on two species of mites of the genus Cosmolaelaps Berlese, 1903 in Iran--C. dorfakiensis sp. nov., and C. pinnatus sp. nov., extracted from soil and leaf litter samples in Guilan Province, Northern Iran. A key to the species of Cosmolaelaps occurring in the Iran is also provided.


Assuntos
Ácaros/classificação , Distribuição Animal , Estruturas Animais/anatomia & histologia , Estruturas Animais/crescimento & desenvolvimento , Animais , Tamanho Corporal , Feminino , Irã (Geográfico) , Masculino , Ácaros/anatomia & histologia , Ácaros/crescimento & desenvolvimento , Tamanho do Órgão
6.
Zootaxa ; 3785: 241-57, 2014 Apr 03.
Artigo em Inglês | MEDLINE | ID: mdl-24872181

RESUMO

Diplothrombium sahragardi sp. nov. and Diplothrombium ostovani sp. nov. (Acari: Johnstonianidae) collected from soil samples (off host) in a forest near Asalem city (Iran) are described. Another species of this family Johnstoniana parva Wendt, Wohltmann, Eggers and Otto, 1994 is reported for the first time from Iran. A larva-based key to Diplothrombium is provided.


Assuntos
Ácaros e Carrapatos/anatomia & histologia , Ácaros e Carrapatos/classificação , Animais , Demografia , Irã (Geográfico) , Larva/anatomia & histologia , Larva/classificação , Solo , Especificidade da Espécie
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