Some ultrastructural observations of the vegetative, resting and excysting ciliate, urostyla grandis (urostylidae, hypotrichida)

In order to reveal the differentiation characteristics of organelles of ciliates under different physiological status, the cellular ultrastructure of Urostyla grandis was studied by transmission electron microscopy. In the resting cells most ciliary shafts, kinetosomes and sub-pellicle microtubules...

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Autores principales:	LIU,ZHAO, YI-SONG,LI, JUN-GANG,LI, FU-KANG,GU
Lenguaje:	English
Publicado:	Sociedad de Biología de Chile 2009
Materias:	Urostyla grandis Ultrastructure Vegetative cell Resting cell Excysting cell
Acceso en línea:	http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0716-97602009000400001
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spelling	oai:scielo:S0716-976020090004000012010-03-17Some ultrastructural observations of the vegetative, resting and excysting ciliate, urostyla grandis (urostylidae, hypotrichida)LIU,ZHAOYI-SONG,LIJUN-GANG,LIFU-KANG,GU Urostyla grandis Ultrastructure Vegetative cell Resting cell Excysting cell In order to reveal the differentiation characteristics of organelles of ciliates under different physiological status, the cellular ultrastructure of Urostyla grandis was studied by transmission electron microscopy. In the resting cells most ciliary shafts, kinetosomes and sub-pellicle microtubules were resorbed, and the endoplasmic reticulum (ER) disappeared with the autophagocytosis taking place within the cytoplasm. As well, the nuclear matrix of the macronucleus was extruded into the cytoplasm, forming pseudopodia-like structures with large quantities of heterochromatin (CH) attached to the inner nuclear membrane. During excystment, membraneous structures developed and gradually increased in number to form the ER. Autophagic vacuoles (AVs) appeared containing mitochondria, paraglycogen particles (PGP), membranous structures, etc. Moreover, the number of nucleoli decreased with the chromatin, condensing in parallel with the process of recombination. Based on these observations, it could be concluded that the de-differentiation of microtubular organelles and the changes occurring in macronuclei in the resting Urostyla grandis, as well as the differentiation of cytoplasmic organelles, digestion by AVs, and the recombination of chromatin during excystment, are not similar to events that occur in non-kinetosome-resorbing cysts (NKR).info:eu-repo/semantics/openAccessSociedad de Biología de ChileBiological Research v.42 n.4 20092009-01-01text/htmlhttp://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0716-97602009000400001en10.4067/S0716-97602009000400001
institution	Scielo Chile
collection	Scielo Chile
language	English
topic	Urostyla grandis Ultrastructure Vegetative cell Resting cell Excysting cell
spellingShingle	Urostyla grandis Ultrastructure Vegetative cell Resting cell Excysting cell LIU,ZHAO YI-SONG,LI JUN-GANG,LI FU-KANG,GU Some ultrastructural observations of the vegetative, resting and excysting ciliate, urostyla grandis (urostylidae, hypotrichida)
description	In order to reveal the differentiation characteristics of organelles of ciliates under different physiological status, the cellular ultrastructure of Urostyla grandis was studied by transmission electron microscopy. In the resting cells most ciliary shafts, kinetosomes and sub-pellicle microtubules were resorbed, and the endoplasmic reticulum (ER) disappeared with the autophagocytosis taking place within the cytoplasm. As well, the nuclear matrix of the macronucleus was extruded into the cytoplasm, forming pseudopodia-like structures with large quantities of heterochromatin (CH) attached to the inner nuclear membrane. During excystment, membraneous structures developed and gradually increased in number to form the ER. Autophagic vacuoles (AVs) appeared containing mitochondria, paraglycogen particles (PGP), membranous structures, etc. Moreover, the number of nucleoli decreased with the chromatin, condensing in parallel with the process of recombination. Based on these observations, it could be concluded that the de-differentiation of microtubular organelles and the changes occurring in macronuclei in the resting Urostyla grandis, as well as the differentiation of cytoplasmic organelles, digestion by AVs, and the recombination of chromatin during excystment, are not similar to events that occur in non-kinetosome-resorbing cysts (NKR).
author	LIU,ZHAO YI-SONG,LI JUN-GANG,LI FU-KANG,GU
author_facet	LIU,ZHAO YI-SONG,LI JUN-GANG,LI FU-KANG,GU
author_sort	LIU,ZHAO
title	Some ultrastructural observations of the vegetative, resting and excysting ciliate, urostyla grandis (urostylidae, hypotrichida)
title_short	Some ultrastructural observations of the vegetative, resting and excysting ciliate, urostyla grandis (urostylidae, hypotrichida)
title_full	Some ultrastructural observations of the vegetative, resting and excysting ciliate, urostyla grandis (urostylidae, hypotrichida)
title_fullStr	Some ultrastructural observations of the vegetative, resting and excysting ciliate, urostyla grandis (urostylidae, hypotrichida)
title_full_unstemmed	Some ultrastructural observations of the vegetative, resting and excysting ciliate, urostyla grandis (urostylidae, hypotrichida)
title_sort	some ultrastructural observations of the vegetative, resting and excysting ciliate, urostyla grandis (urostylidae, hypotrichida)
publisher	Sociedad de Biología de Chile
publishDate	2009
url	http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0716-97602009000400001
work_keys_str_mv	AT liuzhao someultrastructuralobservationsofthevegetativerestingandexcystingciliateurostylagrandisurostylidaehypotrichida AT yisongli someultrastructuralobservationsofthevegetativerestingandexcystingciliateurostylagrandisurostylidaehypotrichida AT jungangli someultrastructuralobservationsofthevegetativerestingandexcystingciliateurostylagrandisurostylidaehypotrichida AT fukanggu someultrastructuralobservationsofthevegetativerestingandexcystingciliateurostylagrandisurostylidaehypotrichida
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Some ultrastructural observations of the vegetative, resting and excysting ciliate, urostyla grandis (urostylidae, hypotrichida)

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