دورية
Induced Effects of Host Plants on Susceptibility of Cotton Leafworm, Spodoptera littoralisto the Pathogenic Bacterium Bacillus thuringiensissubsp. Kurstakiand on Digestive Enzymatic Activities
| العنوان: | Induced Effects of Host Plants on Susceptibility of Cotton Leafworm, Spodoptera littoralisto the Pathogenic Bacterium Bacillus thuringiensissubsp. Kurstakiand on Digestive Enzymatic Activities |
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| المؤلفون: | Ismail, Seham Mansour, Sleem, Fatma Mohamed Amin |
| المصدر: | Agricultural Research; 20220101, Issue: Preprints p1-7, 7p |
| مستخلص: | The pathogen's effectiveness may be influenced by the insect's host plants. The purpose of this study was to examine if the entomopathogenic bacteria Bacillus thuringiensisvar. kurstaki(BtK) was compatible with three hosts from diverse plant families including corn (Zea maysL.), lettuce (Lactuca sativaL.) and sugar beet (Beta vulgarisL.) against Spodoptera littoralis(Boisduval). BtK showed highest toxicity toward the sugar beet population compared with other host populations. The LC50values of BtK were 17.67- and 7.89-fold for corn and sugar beet populations, respectively, lower than those of lettuce population. Because the difference might be explained by the dietary effects of host plants on the overall physiological condition of S. littoralislarvae, the digestive enzymatic and intermediate metabolism were investigated. The α-amylase and lipase activities in the midgut of S. littoralislettuce population were all significantly higher than those of corn and sugar beet populations, while the highest activity of protease was observed in the corn population. In the lettuce population, the intermediary metabolism response, expressed as acid and alkaline phosphatases (ACP and ALP), was significantly (P≤ 0.05) lower than those of the sugar beet and corn populations. On the contrary, the activity of lactate dehydrogenase (LDH) significantly increased on lettuce population compared with other host plants. The highest amount of protein (0.188 mg) and triglyceride (TAG: 0.219 mg/mL) was found in larvae fed on lettuce. According to these findings, the host plant has an indirect role in BtK's suppression of cotton leafworm. |
| قاعدة البيانات: | Supplemental Index |
Find this article in full text from Springer Verlag. 
Full Text Finder | تدمد: | 2249720X 22497218 |
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| DOI: | 10.1007/s40003-022-00633-8 |