Matches in SemOpenAlex for { <https://semopenalex.org/work/W2024370373> ?p ?o ?g. }
Showing items 1 to 56 of
56
with 100 items per page.
- W2024370373 endingPage "1143" @default.
- W2024370373 startingPage "1134" @default.
- W2024370373 abstract "The ultrastructure of the respiratory apparatus in the egg of Tetranychus urticae Koch is described. The maturing egg (older than 68 hours, 28°C) has underneath the transparent shell an air-filled duct system which consists of 1 frontal and 2 lateral branches. These ducts are kept open with the aid of a multitude of small pillars (“micropillars”) which expand between the shell and the underlying intermediate lamella. The micropillars arise on the latter in the course of development of the embryo (44 hours, 28°C). Their length varies between 0.1 and 0.45 µ and in consequence so does the airspace between shell and lamella. The intermediate lamella is composed of laminae which frequently show a substructure of arched fibrils. Because of its morphological adaptations, the micropillars and the perforation organs, the intermediate lamella is a most important mediator of embryonic gas exchange. The two perforation organs penetrate the egg shell, causing air to enter the system, which afterwards appears brightly contrasted under incident light. They are situated on 2 curved branches of the frontal part of the air-duct system, and are approximately 6.5 µ wide and 5.5 µ deep. They probably originate within the embryo and rise to the embryo's surface, where they fuse with the intermediate lamella, possibly initiating the differentiation of its superficial zones of micropillars. After perforation, the shell admits air and the perforation organs become part of the air-duct system. Perforation is effected by a slender cone approximately 5 µ long and 1.8 µ wide at its base. It has an internal cavity which is closed toward the embryo but is apparently continuous with one or several fine ducts leading to the tip of the cone. This characteristic may indicate the production of a lytic substance which might play an important part in the process of perforation. Characteristic deformation of the tough and inelastic shell underscores this possibility, as demonstrated by both conventional and scanning electron microscopy. Besides their function of puncturing the shell, the perforation organs serve to conduct the respiratory gases from the orifices in the shell through their chambers into the connecting canal and the airduct system. Several morphological details in the structure of cone and chambers might play important parts in this process." @default.
- W2024370373 created "2016-06-24" @default.
- W2024370373 creator A5016814749 @default.
- W2024370373 date "1971-09-15" @default.
- W2024370373 modified "2023-10-18" @default.
- W2024370373 title "Electron-Microscopic Studies of the Respiratory Mechanism of Spider Mite Eggs1" @default.
- W2024370373 doi "https://doi.org/10.1093/aesa/64.5.1134" @default.
- W2024370373 hasPublicationYear "1971" @default.
- W2024370373 type Work @default.
- W2024370373 sameAs 2024370373 @default.
- W2024370373 citedByCount "19" @default.
- W2024370373 countsByYear W20243703732012 @default.
- W2024370373 countsByYear W20243703732015 @default.
- W2024370373 countsByYear W20243703732020 @default.
- W2024370373 countsByYear W20243703732022 @default.
- W2024370373 crossrefType "journal-article" @default.
- W2024370373 hasAuthorship W2024370373A5016814749 @default.
- W2024370373 hasConcept C105702510 @default.
- W2024370373 hasConcept C136301237 @default.
- W2024370373 hasConcept C159985019 @default.
- W2024370373 hasConcept C192562407 @default.
- W2024370373 hasConcept C2778456384 @default.
- W2024370373 hasConcept C2778527123 @default.
- W2024370373 hasConcept C2781212128 @default.
- W2024370373 hasConcept C86803240 @default.
- W2024370373 hasConcept C87555872 @default.
- W2024370373 hasConceptScore W2024370373C105702510 @default.
- W2024370373 hasConceptScore W2024370373C136301237 @default.
- W2024370373 hasConceptScore W2024370373C159985019 @default.
- W2024370373 hasConceptScore W2024370373C192562407 @default.
- W2024370373 hasConceptScore W2024370373C2778456384 @default.
- W2024370373 hasConceptScore W2024370373C2778527123 @default.
- W2024370373 hasConceptScore W2024370373C2781212128 @default.
- W2024370373 hasConceptScore W2024370373C86803240 @default.
- W2024370373 hasConceptScore W2024370373C87555872 @default.
- W2024370373 hasIssue "5" @default.
- W2024370373 hasLocation W20243703731 @default.
- W2024370373 hasOpenAccess W2024370373 @default.
- W2024370373 hasPrimaryLocation W20243703731 @default.
- W2024370373 hasRelatedWork W1984830004 @default.
- W2024370373 hasRelatedWork W2021603613 @default.
- W2024370373 hasRelatedWork W2043252849 @default.
- W2024370373 hasRelatedWork W2094838017 @default.
- W2024370373 hasRelatedWork W2149165162 @default.
- W2024370373 hasRelatedWork W2382205745 @default.
- W2024370373 hasRelatedWork W2500234251 @default.
- W2024370373 hasRelatedWork W4240584934 @default.
- W2024370373 hasRelatedWork W4248854566 @default.
- W2024370373 hasRelatedWork W4254799225 @default.
- W2024370373 hasVolume "64" @default.
- W2024370373 isParatext "false" @default.
- W2024370373 isRetracted "false" @default.
- W2024370373 magId "2024370373" @default.
- W2024370373 workType "article" @default.