Sunn pest, Eurygaster integriceps Putton (Hemiptera: Scutelleridae), digestive α-amylase, α-glucosidase and β-glucosidase

Mehrabadi, Mohammad; Bandani, Ali Reza; Saadati, Fatemeh; Ravan, Sultan

doi:10.1016/j.aspen.2009.01.003

Cited by 25 publications

(19 citation statements)

References 25 publications

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“…Thousand‐corn weight of sample 10 decreased by about 2.3% with respect to the control sample, confirming the sunn pest attack and grain damage 17. The insect sucks nutrients from the barley kernels, injecting amylases and proteases via its saliva that degrade carbohydrates and proteins 18, 20…”

Section: Resultsmentioning

confidence: 80%

“…Sunn pest releases salivary proteases, mainly serine proteases, to degrade barley proteins and to acquire its nitrogenous nutrients 17–19. Mehrabadi et al 20 investigated the digestive enzymes of sunn pest and found α‐amylase, α‐glucosidase and β‐glucosidase activities, thus confirming the polysaccharide‐rich diet of sunn pest.…”

Section: Introductionmentioning

confidence: 98%

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Influence of barley variety, timing of nitrogen fertilisation and sunn pest infestation on malting and brewing

Marconi

Sileoni

Sensidoni

et al. 2010

J. Sci. Food Agric.

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BACKGROUND: This paper presents a multivariate approach to investigate the influence of barley variety, timing of nitrogen fertilisation and sunn pest infestation on malting and brewing. Four spring and two winter barley varieties were grown in one location in southern Europe. Moreover, one of the spring varieties was infested with sunn pest, in order to study the effects of this pest on malting quality, and subjected to different nitrogen fertilisation timing regimes. The samples were micromalted, mashed, brewed and analysed.

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Section: Resultsmentioning

confidence: 80%

Section: Introductionmentioning

confidence: 98%

Influence of barley variety, timing of nitrogen fertilisation and sunn pest infestation on malting and brewing

Marconi

Sileoni

Sensidoni

et al. 2010

J. Sci. Food Agric.

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“…Due to statistical differences between did the two fractions, high amylolytic activity in both fractions is interesting in polysaccharide digestion. Mehrabadi et al (2009) found a little difference in the amylolytic activity extracted from soluble and membrane-bound fractions from four regions in the midgut of Eurygaster integriceps Puton (Hemiptera: Scutelleridae) so that membranebound fractions of V1 and V4 parts of the midgut had higher amylolytic activity than soluble ones but no differences were found in V2 and V3. The majority of studies on α-amylase showed higher amylolytic activity in soluble fractions of the midgut in addition to the two last larval instars, which coincides with our study (Gutierrez et al 1990;Abraham et al 1992;Ferreira et al 1999;Mendiola-Olaya et al 2000;Zibaee et al 2008a;Yazdani et al 2010).…”

Section: Discussionmentioning

confidence: 91%

Digestive enzymes of large cabbage white butterfly,Pieris brassicaeL. (Lepidoptera: Pieridae) from developmental and site of activity perspectives

Zibaee

2012

Italian Journal of Zoology

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Investigation of digestive enzymes in the alimentary tract of insects is very important for knowledge on physiology of nutrition. The overall results of this study showed the presence of the majority of digestive enzymes including α-amylase, α-and β-glucosidase and galactosidase, lipases and proteases in the midgut of Pieris brassicae. It was found that the fourth and fifth instar larvae had the highest enzymatic activity, but the obvious differences were found in the cases of sites of enzyme activity known as soluble and membrane-bound fractions. The highest enzymatic activities in the soluble fractions were found in cases of α-amylase, lipases and proteinases such as trypsin-like, chymotrypsin-like and elastase. In contrast, glycosidases and exopeptidases (amino and carboxypeptidases) demonstrated the highest enzymatic activity in the membrane-bound fractions. However, no enzymatic activity was observed on cysteine protease as a type of proteinases. By using line regression, parameter β (slope) showed larval dependency on enzymes along with developmental and feeding processes. It was found that α-glucosidase had the highest slope and the membrane-bound fraction of general proteases had the lowest, showing high and low dependencies of larvae to α-glucosidase and exopeptidases, respectively, in addition to second priority on β-glucosidase and α-amylase. Optimal pHs of soluble and membrane-bound α-amylase were found at 9 while all assayed glycosidases had the highest activity at pH 8 for both fractions. Soluble fraction of lipase had the highest enzymatic activity at pH 8 in comparison with membrane-bound fraction at pH 10. The soluble fraction showed the highest proteolytic activity at pH 9, while the highest proteolytic activity was observed at pH 8 in the case of the membrane-bound one.

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“…Therefore, the substantial efforts have been made so far by wheat breeders both to explain the resistance mechanism and methods to determine resistance to wheat bugs and to select the potential gene sources to utilize the resistance to wheat bug infestation in wheat breeding. In this way, an important contribution to agricultural economy has been made equally beneficial to wheat producers, millers, and bakers [10–12]. …”

Section: Introductionmentioning

confidence: 99%

Effects of Wheat Bug (Eurygasterspp. andAeliaspp.) Infestation in Preharvest Period on Wheat Technological Quality and Gluten Composition

Torbica

Mastilović

Pojić

et al. 2014

The Scientific World Journal

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The effects of wheat bug infestation (Eurygaster spp. and Aelia spp.) on the composition of wheat gluten proteins and its influence on flour technological quality were investigated in the present study. Wheat samples of six wheat varieties, collected from two localities in northern Serbia, were characterized by significantly different level of wheat bug infestation. Composition of wheat gluten proteins was determined using sodium dodecyl sulphate polyacrylamide gel electrophoresis (SDS PAGE), while the selected parameters of technological quality were determined according to standard and modified empirical rheological methods (Farinograph, Extensograph, Alveograph, and Gluten Index). The surface morphology of the selected samples was viewed using scanning electron microscopy (SEM). Wheat from wheat bug-infested locality regardless of the variety had deteriorated technological quality expressed with higher Farinograph softening degree, lower or immeasurable Extensograph energy, and Alveograph deformation energy. The most important changes in the gluten proteins composition of bug-infested wheat were related to gliadin subunits with molecular weights below 75 kDa, which consequently caused deterioration of uniaxial and biaxial extensibility and dough softening during mixing.

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Sunn pest, Eurygaster integriceps Putton (Hemiptera: Scutelleridae), digestive α-amylase, α-glucosidase and β-glucosidase

Cited by 25 publications

References 25 publications

Influence of barley variety, timing of nitrogen fertilisation and sunn pest infestation on malting and brewing

Influence of barley variety, timing of nitrogen fertilisation and sunn pest infestation on malting and brewing

Digestive enzymes of large cabbage white butterfly,Pieris brassicaeL. (Lepidoptera: Pieridae) from developmental and site of activity perspectives

Effects of Wheat Bug (Eurygasterspp. andAeliaspp.) Infestation in Preharvest Period on Wheat Technological Quality and Gluten Composition

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