Qualitative and quantitative modifications of root mitochondria during senescence of above-ground parts of Arabidopis thaliana

This work studied modifications experienced by root mitochondria during whole plant senescence orunder light deprivation, using Arabidopsis thaliana plants with YFP tagged to mitochondria. During post-bolting development, root respiratory activity started to decline after aboveground organs (i.e., r...

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Autores principales:	Fanello, Diego Darío, Bartoli, Carlos Guillermo, Guiamet, Juan José
Formato:	Articulo
Lenguaje:	Inglés
Publicado:	2017
Materias:	Ciencias Agrarias Mitochondria Root Senescence Carbohydrate starvation Respiration Arabidopsis thalianaa
Acceso en línea:	http://sedici.unlp.edu.ar/handle/10915/104011
Aporte de:	SEDICI (UNLP) de Universidad Nacional de La Plata

id	I19-R120-10915-104011
record_format	dspace
institution	Universidad Nacional de La Plata
institution_str	I-19
repository_str	R-120
collection	SEDICI (UNLP)
language	Inglés
topic	Ciencias Agrarias Mitochondria Root Senescence Carbohydrate starvation Respiration Arabidopsis thalianaa
spellingShingle	Ciencias Agrarias Mitochondria Root Senescence Carbohydrate starvation Respiration Arabidopsis thalianaa Fanello, Diego Darío Bartoli, Carlos Guillermo Guiamet, Juan José Qualitative and quantitative modifications of root mitochondria during senescence of above-ground parts of Arabidopis thaliana
topic_facet	Ciencias Agrarias Mitochondria Root Senescence Carbohydrate starvation Respiration Arabidopsis thalianaa
description	This work studied modifications experienced by root mitochondria during whole plant senescence orunder light deprivation, using Arabidopsis thaliana plants with YFP tagged to mitochondria. During post-bolting development, root respiratory activity started to decline after aboveground organs (i.e., rosetteleaves) had senesced. This suggests that carbohydrate starvation may induce root senescence. Similarly, darkening the whole plant induced a decrease in respiration of roots. This was partially due to a decreasein the number of total mitochondria (YFP-labelled mitochondria) and most probably to a decrease inthe quantity of mitochondria with a developed inner membrane potential (ΔΨm, i.e., Mitotracker red-labelled mitochondria). Also, the lower amount of mitochondria with ΔΨm compared to YFP-labelled mitochondria at 10d of whole darkened plant, suggests the presence of mitochondria in a “standby state”. The experiments also suggest that small mitochondria made the main contribution to the respiratory activity that was lost during root senescence. Sugar supplementation partially restored the respiration of mitochondria after 10d of whole plant dark treatment. These results suggest that root senescence is triggered by carbohydrate starvation, with loss of ΔΨm mitochondria and changes in mitochondrial size distribution.
format	Articulo Articulo
author	Fanello, Diego Darío Bartoli, Carlos Guillermo Guiamet, Juan José
author_facet	Fanello, Diego Darío Bartoli, Carlos Guillermo Guiamet, Juan José
author_sort	Fanello, Diego Darío
title	Qualitative and quantitative modifications of root mitochondria during senescence of above-ground parts of Arabidopis thaliana
title_short	Qualitative and quantitative modifications of root mitochondria during senescence of above-ground parts of Arabidopis thaliana
title_full	Qualitative and quantitative modifications of root mitochondria during senescence of above-ground parts of Arabidopis thaliana
title_fullStr	Qualitative and quantitative modifications of root mitochondria during senescence of above-ground parts of Arabidopis thaliana
title_full_unstemmed	Qualitative and quantitative modifications of root mitochondria during senescence of above-ground parts of Arabidopis thaliana
title_sort	qualitative and quantitative modifications of root mitochondria during senescence of above-ground parts of arabidopis thaliana
publishDate	2017
url	http://sedici.unlp.edu.ar/handle/10915/104011
work_keys_str_mv	AT fanellodiegodario qualitativeandquantitativemodificationsofrootmitochondriaduringsenescenceofabovegroundpartsofarabidopisthaliana AT bartolicarlosguillermo qualitativeandquantitativemodificationsofrootmitochondriaduringsenescenceofabovegroundpartsofarabidopisthaliana AT guiametjuanjose qualitativeandquantitativemodificationsofrootmitochondriaduringsenescenceofabovegroundpartsofarabidopisthaliana
bdutipo_str	Repositorios
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Qualitative and quantitative modifications of root mitochondria during senescence of above-ground parts of Arabidopis thaliana

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