Oogenesis in the drone fly , Eristalis Cerealis Fabricius (Diptera;Syrphidae) Naoki FUJIWARA 1 ) and Morihisa KURIHARA 2 ) 1) Detart: 問lenf01 Oral Anato 削Iy n , School 01 Dentist η" Iwafe Medical University , Morioka , Iwafe 020 , J a , 世 αn 2) Labora ωη 01 Applied En 仰削logy , Faculty 01 Ag riculture , JwafeUniversity , Mori ・ 'oka , Jwafe 020 , Jap 仰 25 Thedronefly , Eris ω lis 印刷lisFabricius , haspracticallybeenusedasa pollinato r. Anartificialmassrearing of this specieshasbeensuccessfu l .However , fundamentalstudiesof reproductivesystemincludingtheoogenesishasremainedto bedone. Forunderstanding of thechangesin oogenesisat a low temperature during breeding season , thehistologicalstudy wasdoneonfollowingproblems: 1) normaloogenesisatamoderatetemperature (25 0 C), 2) changesinoogenesisatalow temperature (l 5T) , 3)recovery of the normal oogenesis in the females transferredto 25 0 C仕 om15T 目 1. Mo ゆhology010 叩門esand normal oogenesis at 25 0 C The ovary of thisspecies consists of about 116 polytrophic type ovarioles andtheoogenesisprogresses synchronous ly in ahnostallovarioles. Inthevitellariumof afullgrownovariole , threesuccessivegrowingeggfollicleswereobserved. Thesecondandthirdeggfollicles , however , wereintheearlyprevitellogenicstagewhenthebasalorfrrstegg-follicle reached maturitywiththechorion. Sincethefemaleadultshadveryshortlifespan(7-10days at 25 OC) , theonly basalegg follicleswere oviposited and the remaining young egg folli cJ e did not mature. An egg folli cJ eis composed of sevennursecells and an oocytecovered with a singlefollicular epithelium.Intheearly oogenesis the follicular cells began to surround at first the oocyte and later the nurse chamber to form a uniform epithelium. Fig.1 lU ustration ofelectron microscopic degenerative symptons ofanurse cell at low temperature (l 5 0 C)in E 作sfaliscerealis F. CI: Cytoplasmicisland , Lys:Lysosome , Mi t :Mitochondria , N:Nu cJ eus , rE R: rough-surfaced endoplasmic reticulum. Proc. Arthropod. Emb η '0 1 .50c. .h仰., (23)
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Oogenesis in the drone fly Eristalis Cerealis Fabricius (Diptera; Syrphidae…aesj.co-site.jp/num23/1987_Vol.23_25.pdf · 2015. 2. 17. · Oogenesis in the drone fly , Eristalis
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Oogenesis in the drone fly, Eristalis Cerealis Fabricius (Diptera; Syrphidae)
Naoki FUJIWARA1) and Morihisa KURIHARA2)
1) Detart:問lenf01 Oral Anato削Iyn, School 01 Dentistη" Iwafe Medical University, Morioka, Iwafe 020, Ja,世αn