Grasshopper Development - Revision history

Z8600021 at 06:17, 27 July 2015

2015-07-27T06:17:44Z

← Older revision		Revision as of 16:17, 27 July 2015
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	<pubmed limit=5>Grasshopper Development</pubmed>		<pubmed limit=5>Grasshopper Development</pubmed>
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	==
	==Spermatogenesis==		==Spermatogenesis==

	[[File:Bailey013.jpg\|400px]]		[[File:Bailey013.jpg\|400px]]

	Historic drawing of stages in the spermatogenesis of a grasshopper (Stenobothrus viridulus)		Historic drawing of stages in the spermatogenesis of a grasshopper (''Stenobothrus viridulus'')

	==Grasshopper Lifecycle==		==Grasshopper Lifecycle==

Z8600021 at 06:16, 27 July 2015

2015-07-27T06:16:41Z

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	* '''Embryonic development of the cricket ''Gryllus bimaculatus'''''<ref name="PMID25907229"><pubmed>25907229</pubmed></ref> "The existing cricket embryonic staging system is fragmentary, and it is based on morphological landmarks that are not easily visible on a live, undissected egg. To address this problem, here we present a complementary set of "egg stages" that serve as a guide for identifying the developmental progress of a cricket embryo from fertilization to hatching, based solely on the external appearance of the egg. These stages were characterized using a combination of brightfield timelapse microscopy, timed brightfield micrographs, confocal microscopy, and measurements of egg dimensions. These egg stages are particularly useful in experiments that involve egg injection (including RNA interference, targeted genome modification, and transgenesis), as injection can alter the speed of development, even in control treatments. We also use 3D reconstructions of fixed embryo preparations to provide a comprehensive description of the morphogenesis and anatomy of the cricket embryo during embryonic rudiment assembly, germ band formation, elongation, segmentation, and appendage formation. Finally, we aggregate and schematize a variety of published developmental gene expression patterns."		* '''Embryonic development of the cricket ''Gryllus bimaculatus'''''<ref name="PMID25907229"><pubmed>25907229</pubmed>\| [http://www.sciencedirect.com/science/article/pii/S001216061500189X Dev Biol.]</ref> "The existing cricket embryonic staging system is fragmentary, and it is based on morphological landmarks that are not easily visible on a live, undissected egg. To address this problem, here we present a complementary set of "egg stages" that serve as a guide for identifying the developmental progress of a cricket embryo from fertilization to hatching, based solely on the external appearance of the egg. These stages were characterized using a combination of brightfield timelapse microscopy, timed brightfield micrographs, confocal microscopy, and measurements of egg dimensions. These egg stages are particularly useful in experiments that involve egg injection (including RNA interference, targeted genome modification, and transgenesis), as injection can alter the speed of development, even in control treatments. We also use 3D reconstructions of fixed embryo preparations to provide a comprehensive description of the morphogenesis and anatomy of the cricket embryo during embryonic rudiment assembly, germ band formation, elongation, segmentation, and appendage formation. Finally, we aggregate and schematize a variety of published developmental gene expression patterns."
	* '''Embryonic development of the insect central complex: insights from lineages in the grasshopper and Drosophila'''<ref><pubmed>21382507</pubmed></ref> "The neurons of the insect brain derive from neuroblasts which delaminate from the neuroectoderm at stereotypic locations during early embryogenesis. In both grasshopper and Drosophila, each developing neuroblast acquires an intrinsic capacity for neuronal proliferation in a cell autonomous manner and generates a specific lineage of neural progeny which is nearly invariant and unique. Maps revealing numbers and distributions of brain neuroblasts now exist for various species, and in both grasshopper and Drosophila four putatively homologous neuroblasts have been identified whose progeny direct axons to the protocerebral bridge and then to the central body via an equivalent set of tracts. Lineage analysis in the grasshopper nervous system reveals that the progeny of a neuroblast maintain their topological position within the lineage throughout embryogenesis. We have taken advantage of this to study the pioneering of the so-called w, x, y, z tracts, to show how fascicle switching generates central body neuroarchitecture, and to evaluate the roles of so-called intermediate progenitors as well as programmed cell death in shaping lineage structure."		* '''Embryonic development of the insect central complex: insights from lineages in the grasshopper and Drosophila'''<ref><pubmed>21382507</pubmed></ref> "The neurons of the insect brain derive from neuroblasts which delaminate from the neuroectoderm at stereotypic locations during early embryogenesis. In both grasshopper and Drosophila, each developing neuroblast acquires an intrinsic capacity for neuronal proliferation in a cell autonomous manner and generates a specific lineage of neural progeny which is nearly invariant and unique. Maps revealing numbers and distributions of brain neuroblasts now exist for various species, and in both grasshopper and Drosophila four putatively homologous neuroblasts have been identified whose progeny direct axons to the protocerebral bridge and then to the central body via an equivalent set of tracts. Lineage analysis in the grasshopper nervous system reveals that the progeny of a neuroblast maintain their topological position within the lineage throughout embryogenesis. We have taken advantage of this to study the pioneering of the so-called w, x, y, z tracts, to show how fascicle switching generates central body neuroarchitecture, and to evaluate the roles of so-called intermediate progenitors as well as programmed cell death in shaping lineage structure."
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			{\| class="wikitable mw-collapsible mw-collapsed"
			! More recent papers
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			\| [[File:Mark_Hill.jpg\|90px\|left]] {{Most_Recent_Refs}}

			Search term: [http://www.ncbi.nlm.nih.gov/pubmed/?term=Grasshopper+Development ''Grasshopper Development'']

			<pubmed limit=5>Grasshopper Development</pubmed>
			\|}
			==
	==Spermatogenesis==		==Spermatogenesis==

Z8600021 at 06:09, 27 July 2015

2015-07-27T06:09:09Z

← Older revision		Revision as of 16:09, 27 July 2015
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			* '''Embryonic development of the cricket ''Gryllus bimaculatus'''''<ref name="PMID25907229"><pubmed>25907229</pubmed></ref> "The existing cricket embryonic staging system is fragmentary, and it is based on morphological landmarks that are not easily visible on a live, undissected egg. To address this problem, here we present a complementary set of "egg stages" that serve as a guide for identifying the developmental progress of a cricket embryo from fertilization to hatching, based solely on the external appearance of the egg. These stages were characterized using a combination of brightfield timelapse microscopy, timed brightfield micrographs, confocal microscopy, and measurements of egg dimensions. These egg stages are particularly useful in experiments that involve egg injection (including RNA interference, targeted genome modification, and transgenesis), as injection can alter the speed of development, even in control treatments. We also use 3D reconstructions of fixed embryo preparations to provide a comprehensive description of the morphogenesis and anatomy of the cricket embryo during embryonic rudiment assembly, germ band formation, elongation, segmentation, and appendage formation. Finally, we aggregate and schematize a variety of published developmental gene expression patterns."
	* '''Embryonic development of the insect central complex: insights from lineages in the grasshopper and Drosophila'''<ref><pubmed>21382507</pubmed></ref> "The neurons of the insect brain derive from neuroblasts which delaminate from the neuroectoderm at stereotypic locations during early embryogenesis. In both grasshopper and Drosophila, each developing neuroblast acquires an intrinsic capacity for neuronal proliferation in a cell autonomous manner and generates a specific lineage of neural progeny which is nearly invariant and unique. Maps revealing numbers and distributions of brain neuroblasts now exist for various species, and in both grasshopper and Drosophila four putatively homologous neuroblasts have been identified whose progeny direct axons to the protocerebral bridge and then to the central body via an equivalent set of tracts. Lineage analysis in the grasshopper nervous system reveals that the progeny of a neuroblast maintain their topological position within the lineage throughout embryogenesis. We have taken advantage of this to study the pioneering of the so-called w, x, y, z tracts, to show how fascicle switching generates central body neuroarchitecture, and to evaluate the roles of so-called intermediate progenitors as well as programmed cell death in shaping lineage structure."		* '''Embryonic development of the insect central complex: insights from lineages in the grasshopper and Drosophila'''<ref><pubmed>21382507</pubmed></ref> "The neurons of the insect brain derive from neuroblasts which delaminate from the neuroectoderm at stereotypic locations during early embryogenesis. In both grasshopper and Drosophila, each developing neuroblast acquires an intrinsic capacity for neuronal proliferation in a cell autonomous manner and generates a specific lineage of neural progeny which is nearly invariant and unique. Maps revealing numbers and distributions of brain neuroblasts now exist for various species, and in both grasshopper and Drosophila four putatively homologous neuroblasts have been identified whose progeny direct axons to the protocerebral bridge and then to the central body via an equivalent set of tracts. Lineage analysis in the grasshopper nervous system reveals that the progeny of a neuroblast maintain their topological position within the lineage throughout embryogenesis. We have taken advantage of this to study the pioneering of the so-called w, x, y, z tracts, to show how fascicle switching generates central body neuroarchitecture, and to evaluate the roles of so-called intermediate progenitors as well as programmed cell death in shaping lineage structure."
	\|}		\|}

Z8600021 at 06:06, 27 July 2015

2015-07-27T06:06:58Z

← Older revision		Revision as of 16:06, 27 July 2015
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			{{Header}}

	== Introduction ==		== Introduction ==
	[[File:Grasshopper- female cartoon.jpg\|thumb\|Grasshopper]]		[[File:Grasshopper- female cartoon.jpg\|thumb\|Grasshopper]]
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	~~{{Template:Animals}}~~

	~~{{Template:Glossary}}~~

	{{~~Template:~~Footer}}		{{Animals}}

			{{Glossary}}

			{{Footer}}

	[[Category:Grasshopper]]		[[Category:Grasshopper]]

Z8600021: /* External Links */

2012-04-19T23:38:55Z

External Links

← Older revision		Revision as of 09:38, 20 April 2012
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	==External Links==		==External Links==
			{{External Links}}

	* Australian Government Department of Agriculture, Fisheries and Forestry [http://www.daff.gov.au/animal-plant-health/locusts/about/about_locusts/lifecycle Lifecycle of a Locust]		* Australian Government Department of Agriculture, Fisheries and Forestry [http://www.daff.gov.au/animal-plant-health/locusts/about/about_locusts/lifecycle Lifecycle of a Locust]

Z8600021: /* Some Recent Findings */

2012-04-19T23:38:03Z

Some Recent Findings

← Older revision		Revision as of 09:38, 20 April 2012
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			* '''Embryonic development of the insect central complex: insights from lineages in the grasshopper and Drosophila'''<ref><pubmed>21382507</pubmed></ref> "The neurons of the insect brain derive from neuroblasts which delaminate from the neuroectoderm at stereotypic locations during early embryogenesis. In both grasshopper and Drosophila, each developing neuroblast acquires an intrinsic capacity for neuronal proliferation in a cell autonomous manner and generates a specific lineage of neural progeny which is nearly invariant and unique. Maps revealing numbers and distributions of brain neuroblasts now exist for various species, and in both grasshopper and Drosophila four putatively homologous neuroblasts have been identified whose progeny direct axons to the protocerebral bridge and then to the central body via an equivalent set of tracts. Lineage analysis in the grasshopper nervous system reveals that the progeny of a neuroblast maintain their topological position within the lineage throughout embryogenesis. We have taken advantage of this to study the pioneering of the so-called w, x, y, z tracts, to show how fascicle switching generates central body neuroarchitecture, and to evaluate the roles of so-called intermediate progenitors as well as programmed cell death in shaping lineage structure."
	\|}		\|}


			==Spermatogenesis==

	[[File:Bailey013.jpg\|400px]]		[[File:Bailey013.jpg\|400px]]

Z8600021 at 23:28, 19 April 2012

2012-04-19T23:28:32Z

← Older revision		Revision as of 09:28, 20 April 2012
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	~~[[File:Bailey013.jpg]]~~

	~~Historic drawing of early development.~~

	==Some Recent Findings==		==Some Recent Findings==
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			[[File:Bailey013.jpg\|400px]]

			Historic drawing of stages in the spermatogenesis of a grasshopper (Stenobothrus viridulus)

	==Grasshopper Lifecycle==		==Grasshopper Lifecycle==

Z8600021: /* Introduction */

2012-04-19T23:27:29Z

Introduction

← Older revision		Revision as of 09:27, 20 April 2012
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	[[File:Grasshopper- female cartoon.jpg\|thumb\|Grasshopper]]		[[File:Grasshopper- female cartoon.jpg\|thumb\|Grasshopper]]
	There is available a USDA and the Agricultural Research Service field guide that describes development in the western grasshopper.<ref>RE. Pfadt, '''Field Guide to Common Western Grasshoppers''' 3rd edn Wyoming Agricultural Experiment Station Bulletin 912 February 2002 University of Wyoming [http://www.sidney.ars.usda.gov/grasshopper/ID_Tools/F_Guide/FieldGde.pdf USDA and the Agricultural Research Service - PDF]</ref>		There is available a USDA and the Agricultural Research Service field guide that describes development in the western grasshopper.<ref>RE. Pfadt, '''Field Guide to Common Western Grasshoppers''' 3rd edn Wyoming Agricultural Experiment Station Bulletin 912 February 2002 University of Wyoming [http://www.sidney.ars.usda.gov/grasshopper/ID_Tools/F_Guide/FieldGde.pdf USDA and the Agricultural Research Service - PDF]</ref>


			[[File:Bailey013.jpg]]

			Historic drawing of early development.

	==Some Recent Findings==		==Some Recent Findings==

S8600021: /* Grasshopper Development */

2010-11-24T05:27:17Z

Grasshopper Development

← Older revision		Revision as of 15:27, 24 November 2010
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	==Grasshopper Development==		==Grasshopper Development==
	[[File:Grasshopper-development-1.jpg]]		[[File:Grasshopper-development-1.jpg\|600px]]

	[[File:Grasshopper-development-2.jpg]]		[[File:Grasshopper-development-2.jpg\|600px]]

	==Grasshopper Heart==		==Grasshopper Heart==

S8600021: /* Grasshopper Heart */

2010-11-24T05:26:38Z

Grasshopper Heart

← Older revision		Revision as of 15:26, 24 November 2010
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	[[File:Grasshopper_lifecycle.jpg\|800px]]		[[File:Grasshopper_lifecycle.jpg\|800px]]

			==Grasshopper Development==
			[[File:Grasshopper-development-1.jpg]]

			[[File:Grasshopper-development-2.jpg]]

	==Grasshopper Heart==		==Grasshopper Heart==