Autophagy regulated by day length determines the number of fertile florets in wheat

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The wheat spikelet meristem differentiates into up to 12 floret primordia, but many of them fail to reach the fertile floret stage at anthesis. We combined microarray, biochemical and anatomical studies to investigate floret development in wheat plants grown in the field under short or long days (sh...

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Autores principales:	Ghiglione, H.O., Gonzalez, F.G., Serrago, R., Maldonado, S.B., Chilcott, C., Curá, J.A., Miralles, D.J., Zhu, T., Casal, J.J.
Formato:	Artículo publishedVersion
Lenguaje:	Inglés
Publicado:	2008
Materias:	Autophagy Floret development Transcriptome Wheat plant RNA sucrose article autophagy carbohydrate metabolism cell death cell division cell proliferation DNA microarray fertility flower gene gene expression profiling gene expression regulation genetics growth, development and aging meristem metabolism photoperiodicity photosynthesis wheat Carbohydrate Metabolism Cell Death Cell Division Cell Proliferation Fertility Flowers Gene Expression Profiling Gene Expression Regulation, Developmental Gene Expression Regulation, Plant Genes, Plant Meristem Oligonucleotide Array Sequence Analysis Photoperiod Photosynthesis RNA, Plant Sucrose Triticum Triticum aestivum
Acceso en línea:	http://hdl.handle.net/20.500.12110/paper_09607412_v55_n6_p1010_Ghiglione
Aporte de:	Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA) de Universidad de Buenos Aires

id	paperaa:paper_09607412_v55_n6_p1010_Ghiglione
record_format	dspace
spelling	paperaa:paper_09607412_v55_n6_p1010_Ghiglione2023-06-12T16:48:45Z Autophagy regulated by day length determines the number of fertile florets in wheat Plant J. 2008;55(6):1010-1024 Ghiglione, H.O. Gonzalez, F.G. Serrago, R. Maldonado, S.B. Chilcott, C. Curá, J.A. Miralles, D.J. Zhu, T. Casal, J.J. Autophagy Floret development Transcriptome Wheat plant RNA sucrose article autophagy carbohydrate metabolism cell death cell division cell proliferation DNA microarray fertility flower gene gene expression profiling gene expression regulation genetics growth, development and aging meristem metabolism photoperiodicity photosynthesis wheat Autophagy Carbohydrate Metabolism Cell Death Cell Division Cell Proliferation Fertility Flowers Gene Expression Profiling Gene Expression Regulation, Developmental Gene Expression Regulation, Plant Genes, Plant Meristem Oligonucleotide Array Sequence Analysis Photoperiod Photosynthesis RNA, Plant Sucrose Triticum Triticum aestivum The wheat spikelet meristem differentiates into up to 12 floret primordia, but many of them fail to reach the fertile floret stage at anthesis. We combined microarray, biochemical and anatomical studies to investigate floret development in wheat plants grown in the field under short or long days (short days extended with low-fluence light) after all the spikelets had already differentiated. Long days accelerated spike and floret development and greening, and the expression of genes involved in photosynthesis, photoprotection and carbohydrate metabolism. These changes started while the spike was in the light-depleted environment created by the surrounding leaf sheaths. Cell division ceased in the tissues of distal florets, which interrupted their normal developmental progression and initiated autophagy, thus decreasing the number of fertile florets at anthesis. A massive decrease in the expression of genes involved in cell proliferation, a decrease in soluble carbohydrate levels, and an increase in the expression of genes involved in programmed cell death accompanied anatomical signs of cell death, and these effects were stronger under long days. We propose a model in which developmentally generated sugar starvation triggers floret autophagy, and long days intensify these processes due to the increased carbohydrate consumption caused by the accelerated plant development. © 2008 The Authors. 2008 info:eu-repo/semantics/article info:ar-repo/semantics/artículo info:eu-repo/semantics/publishedVersion application/pdf eng info:eu-repo/semantics/openAccess http://creativecommons.org/licenses/by/2.5/ar http://hdl.handle.net/20.500.12110/paper_09607412_v55_n6_p1010_Ghiglione
institution	Universidad de Buenos Aires
institution_str	I-28
repository_str	R-134
collection	Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA)
language	Inglés
orig_language_str_mv	eng
topic	Autophagy Floret development Transcriptome Wheat plant RNA sucrose article autophagy carbohydrate metabolism cell death cell division cell proliferation DNA microarray fertility flower gene gene expression profiling gene expression regulation genetics growth, development and aging meristem metabolism photoperiodicity photosynthesis wheat Autophagy Carbohydrate Metabolism Cell Death Cell Division Cell Proliferation Fertility Flowers Gene Expression Profiling Gene Expression Regulation, Developmental Gene Expression Regulation, Plant Genes, Plant Meristem Oligonucleotide Array Sequence Analysis Photoperiod Photosynthesis RNA, Plant Sucrose Triticum Triticum aestivum
spellingShingle	Autophagy Floret development Transcriptome Wheat plant RNA sucrose article autophagy carbohydrate metabolism cell death cell division cell proliferation DNA microarray fertility flower gene gene expression profiling gene expression regulation genetics growth, development and aging meristem metabolism photoperiodicity photosynthesis wheat Autophagy Carbohydrate Metabolism Cell Death Cell Division Cell Proliferation Fertility Flowers Gene Expression Profiling Gene Expression Regulation, Developmental Gene Expression Regulation, Plant Genes, Plant Meristem Oligonucleotide Array Sequence Analysis Photoperiod Photosynthesis RNA, Plant Sucrose Triticum Triticum aestivum Ghiglione, H.O. Gonzalez, F.G. Serrago, R. Maldonado, S.B. Chilcott, C. Curá, J.A. Miralles, D.J. Zhu, T. Casal, J.J. Autophagy regulated by day length determines the number of fertile florets in wheat
topic_facet	Autophagy Floret development Transcriptome Wheat plant RNA sucrose article autophagy carbohydrate metabolism cell death cell division cell proliferation DNA microarray fertility flower gene gene expression profiling gene expression regulation genetics growth, development and aging meristem metabolism photoperiodicity photosynthesis wheat Autophagy Carbohydrate Metabolism Cell Death Cell Division Cell Proliferation Fertility Flowers Gene Expression Profiling Gene Expression Regulation, Developmental Gene Expression Regulation, Plant Genes, Plant Meristem Oligonucleotide Array Sequence Analysis Photoperiod Photosynthesis RNA, Plant Sucrose Triticum Triticum aestivum
description	The wheat spikelet meristem differentiates into up to 12 floret primordia, but many of them fail to reach the fertile floret stage at anthesis. We combined microarray, biochemical and anatomical studies to investigate floret development in wheat plants grown in the field under short or long days (short days extended with low-fluence light) after all the spikelets had already differentiated. Long days accelerated spike and floret development and greening, and the expression of genes involved in photosynthesis, photoprotection and carbohydrate metabolism. These changes started while the spike was in the light-depleted environment created by the surrounding leaf sheaths. Cell division ceased in the tissues of distal florets, which interrupted their normal developmental progression and initiated autophagy, thus decreasing the number of fertile florets at anthesis. A massive decrease in the expression of genes involved in cell proliferation, a decrease in soluble carbohydrate levels, and an increase in the expression of genes involved in programmed cell death accompanied anatomical signs of cell death, and these effects were stronger under long days. We propose a model in which developmentally generated sugar starvation triggers floret autophagy, and long days intensify these processes due to the increased carbohydrate consumption caused by the accelerated plant development. © 2008 The Authors.
format	Artículo Artículo publishedVersion
author	Ghiglione, H.O. Gonzalez, F.G. Serrago, R. Maldonado, S.B. Chilcott, C. Curá, J.A. Miralles, D.J. Zhu, T. Casal, J.J.
author_facet	Ghiglione, H.O. Gonzalez, F.G. Serrago, R. Maldonado, S.B. Chilcott, C. Curá, J.A. Miralles, D.J. Zhu, T. Casal, J.J.
author_sort	Ghiglione, H.O.
title	Autophagy regulated by day length determines the number of fertile florets in wheat
title_short	Autophagy regulated by day length determines the number of fertile florets in wheat
title_full	Autophagy regulated by day length determines the number of fertile florets in wheat
title_fullStr	Autophagy regulated by day length determines the number of fertile florets in wheat
title_full_unstemmed	Autophagy regulated by day length determines the number of fertile florets in wheat
title_sort	autophagy regulated by day length determines the number of fertile florets in wheat
publishDate	2008
url	http://hdl.handle.net/20.500.12110/paper_09607412_v55_n6_p1010_Ghiglione
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_version_	1769810126781284352

Autophagy regulated by day length determines the number of fertile florets in wheat

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