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Ferritin acts as a target site for the snowdrop lectin （GNA） in the midgut of the cotton leafworm spodoptera littoralis

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Insect Science 2008年第6期15卷 513-519页

作者： Amin Sadeghi Guy Smagghe Paul Proost Els J.M. Van Damme Laboratory of Agrozoology Department of Crop Protection Laboratory of Biochemistry and Glycobiology Department of Molecular Biotechnology Faculty of Bioscience Engineering Ghent University Ghent Rega Institute Laboratory of Molecular Immunology Kathofieke Universiteit Leuven Minderbroedersstraat 10 B-3000 Leuven Belgium

The snowdrop lectin GNA （Galanthus nivalis agglutinin） has been shown to possess insecticidal activity to a range of economically important insect pests. However, the precise mechanism of insecticidal action of GNA against insects remains unknown. In this investigation, we attempted to purify and identify receptor（s） responsible for binding of GNA in the larval midgut of a major lepidopteran pest （the cotton leafworm, spodoptera littoralis） to better understand its mode of action. Therefore, cytoplasmic as well as membrane proteins from 800 larval midguts were chromatographed on a column with immobilized GNA. Sodium dodecyl sulfate-polyacrylamide gel electrophoresis analysis of the proteins eluted from the GNA column followed by sequencing of the GNA-binding proteins and BLAST analyses revealed that the N-terminal sequences of a 24 kDa polypeptide purified from the cytoplasmic and membrane protein fraction revealed sequence similarity to sequences encoding heavy chain homologs of ferritin from Manduca sexta （76% sequence identity）, Calpodes ethlius （80% sequence identity） and Bombyx mori （61% sequence identity）. Furthermore, the N-terminal sequence of a 31 kDa polypeptide from the membrane protein fraction showed sequence similarity to a light chain homolog of ferritin from Manduca sexta （88% sequence identity）.

关键词： ferritin Galanthus nivalis agglutinin GNA Lepidoptera midgut receptors spodoptera littoralis

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杀虫脒对夜蛾科害虫(spodoptera littoralis)各个发育阶段的毒性机制

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世界农药 1981年第2期 45-48页

作者： W.Salvisberg R.Neumann G.Voss 李德隆 (瑞士)Ciba-Geigy公司农业部 (瑞士)Ciba-Geigy公司农业部 (瑞士)Ciba-Geigy公司农业部

杀虫脒是一个防治几种重要的鳞翅目害虫很有希望的杀卵剂。Streibert和Dittrich(1977)总结了三种夜蛾科大害虫(spodoptera bittoralis及二种Heliothis属的害虫)的卵和幼虫对杀虫脒的敏感度资料,除杀卵作用外还发现杀虫脒对棉铃虫、烟芽... 详细信息

杀虫脒是一个防治几种重要的鳞翅目害虫很有希望的杀卵剂。Streibert和Dittrich(1977)总结了三种夜蛾科大害虫(spodoptera bittoralis及二种Heliothis属的害虫)的卵和幼虫对杀虫脒的敏感度资料,除杀卵作用外还发现杀虫脒对棉铃虫、烟芽夜蛾成虫产卵行为有高度的活性。本文目的是详细分析杀虫脒对夜蛾科害虫的毒性机制,测定***卵

关键词：害虫鳞翅目卵块 spodoptera littoralis 夜蛾科夜蛾总科发育阶段毒性机制

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Influence of host age and host deprivation on longevity, egg load dynamics and oviposition rate in Microplitis rufiventris

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Insect Science 2007年第6期14卷 485-495页

作者： ESMAT MOHAMED HEGAZI GEHAN MOHAMED ABD EL-AZIZ AHMED YOUSEF EL-SHAZLY WEDAD EMAM KHAFAG Department of Entomology Faculty of Agriculture University of Alexandria Plant Protection Research Institute Sabahia Alexandria Egypt

Adult size, longevity, egg load dynamics and oviposition ofMicroplitis rufiventris Kok. which began their development in the first, second, third （preferred hosts） or fourth （non-preferred hosts） instar larvae of spodoptera littoralis （Boisd.） were studied. The parasitoid size was largely determined by the initial host size at parasitism. Non-ovipositing females derived from older hosts lived for longer periods than those derived from younger ones. However, the ovipositing females, irrespective of their size, lived for almost the same periods. At emergence, the oviducts of adult females contain a significant amount of mature eggs available for oviposition for a few hours on eclosion day. Egg load increases during the early phase of adult life. The amount of additional mature eggs and rate of egg maturation per hour was greater for wasps derived from preferred hosts compared with those in females derived from non-preferred hosts. The pattern of egg production in M. rufiventris females depended on the availability of hosts for parasitization. Host-deprived females depleted the egg complement with aging; the longer the host deprivation, the lower the oviduct egg load. Marked reduction in both realized or potential fecundity of host-deprived females was observed following host availability. Host privation for more than 3 days induced a marked deficit fecundity pattern through the female＇ s life. The realized fecundity was determined by the interaction among host availability, the number of eggs that are matured over the female＇ s life span, oviposition rate and host size from which the female was derived. These results suggest that：（i） M. rufiventris wasp is a weak synovigenic species; （ii） the maturation of additional eggs is inhibited once the maximum oviduct egg load is reached; （iii） the egg load of the newly emerged female is significantly less than the realized fecundity; and （iv） because M. rufiventris females oviposit fewer eggs when they begin depleting their

关键词： aging egg production host privation longevity Microplitis rufiventris,oviposition spodoptera littoralis wasp size

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Natural variation in linalool metabolites:One genetic locus,many functions?

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Journal of Integrative Plant Biology 2021年第8期63卷 1416-1421页

作者： Jun He Rayko Halitschke Ian T.Baldwin Meredith C.Schuman National Citrus Engineering Research Center Citrus Research InstituteSouthwest UniversityChongqing400712 China Department of Molecular Ecology Max Planck Institute for Chemical EcologyJena07745 Germany Departments of Geography and Chemistry University of ZürichZürich8057 Switzerland

The ubiquitous volatile linalool is metabolized in plants to nonvolatile *** studied Nicotiana attenuata plants which naturally vary in(S)-(+)-linalool contents,and lines engineered to produce either(R)-(-)-or(S)-(+)-***(S)-(+)-linalool production was associated with slower growth of a generalist herbivore,and a large fraction was present as nonvolatile *** found that variation in volatile linalool and its nonvolatile glycosides mapped to the same genetic locus which harbored the biosynthetic gene,NaLIS,but that free linalool varied more in environmental *** study reveals how(S)-(+)-linalool and conjugates differ in their regulation and possible functions in resistance.

关键词： conjugated linalool Nicotiana attenuata spodoptera littoralis

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