Difference between revisions of "Flagellum"

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(Created page with "File:Fig 30.jpg|thumb|<font size="2">'''Fig. 1.''' Chloroplasts of foraminiferal symbionts. Gulf of Aqaba. TEM graphs courtesy S. Reber-Leutenegger. '''A:''' Bacillarian (d...")
 
 
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[[File:Fig 30.jpg|thumb|<font size="2">'''Fig. 1.''' Chloroplasts of foraminiferal symbionts. Gulf of Aqaba. TEM graphs courtesy S. Reber-Leutenegger.
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[[File:Fig.30B.png|thumb|<font size="2">'''Fig. 1.''' Chloroplasts of foraminiferal symbionts. Gulf of Aqaba. TEM graphs courtesy S. Reber-Leutenegger; '''B:''' dinophycean (dinoflagellate) symbiont of ''Amphisorus hemprichii'' Ehrenberg. Note sections of short flagellae (arrows) permitting active movement of the symbiont within the lacunar system of the host, to regulate its access to light. The nucleus with its (polyploid) chromosomes visible during the interphase unusual among eucaryotes but characteristic for dinophyceans. x 10,000;
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'''A:''' Bacillarian (diatom) symbionts below lateral chamber wall, housed in eggholders, below pore mouths, of ''Amphistegina lobifera'' Larsen. x 5,000. '''B:''' dinophycean (dinoflagellate) symbiont of ''Amphisorus hemprichii'' Ehrenberg. Note sections of short flagellae (arrows) permitting active movement of the symbiont within the lacunar system of the host, to regulate its access to light. The nucleus with its (polyploid) chromosomes visible during the interphase unusual among eucaryotes but characteristic for dinophyceans. x 10,000. '''C:''' rhodophycean (red algal) symbiont of ''Peneroplis planatus'' (Fichtel et Moll). x 12,000. '''D:''' Bacillarian symbiont of ''Assilina ammonoides'' (Gronovius), ultrathin section oblique-tangential to the lateral surface of achamber. Note the loose stacking of the thylacoids in the chloroplast, a characteristic of symbionts of ''Assilina''. X 8,000. '''E:''' ''Elphidium craticulatum'' (Fichtel et Moll), ultrathin section through a protoplast of a chamber including one of its [[retral processes]] (double arrow), showing free chloroplasts in the host chamberplasm, a characteristic of [[symbiont husbandry]]. x 4,000. '''F:''' Rhodophycean symbionts of ''Peneroplis planatus'' (Fichtel et Moll) from Elba in the Mediterranean. Note starch grains covering the [[pyrenoid]] and filling most of the symbiont's mass. The starch grains may also appear as free grains in the host chamber plasm and represent seasonal food storage for the host. x 4,000.
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'''cpl:''' chloroplast; '''flag:''' flagellum with its base; '''m:''' mitochondrium; '''n:''' nucleus; '''tyl:''' thylacoid; (Hottinger, 2006; fig. 30 [http://paleopolis.rediris.es/cg/CG2006_M02/index.html] '''CC'''/BY-NC-SA)]]
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'''bD:''' basal pore disc; '''cpl:''' chloroplast; '''flag:''' flagellum with its base; '''ilD:''' interlamellar disc of pore; '''m:''' mitochondrium; '''n:''' nucleus; '''OL:''' organic lining; '''p:''' pore; '''Pl:''' plasmalemma; '''ppl:''' pore plug; '''pyr:''' pyrenoid; '''spl:''' (mineralized) sieve plate; '''tyl:''' thylacoid; '''v:''' vacuoles; (Hottinger, 2006; fig. 30 [http://paleopolis.rediris.es/cg/CG2006_M02/index.html] '''CC'''/BY-NC-SA)]]
 
  
 
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*''according to Hottinger (2006):''
 
*''according to Hottinger (2006):''
 
'''FLAGELLUM''' - a tubular extension of the cell, reinforced with microtubuli and anchored by centrioles deep inside the protoplast of dinophycean symbionts. The short flagellae are used for locomotion in the lacunar system of the host as a device for regulating irradiation intensity in order to avoid photoinhibition.  
 
'''FLAGELLUM''' - a tubular extension of the cell, reinforced with microtubuli and anchored by centrioles deep inside the protoplast of dinophycean symbionts. The short flagellae are used for locomotion in the lacunar system of the host as a device for regulating irradiation intensity in order to avoid photoinhibition.  
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Latest revision as of 10:24, 16 April 2019