Phospholipase Dα1 Acts as a Negative Regulator of High Mg2+-Induced Leaf Senescence in Arabidopsis

Magnesium (Mg2+) is a macronutrient involved in essential cellular processes. Its deficiency or excess is a stress factor for plants, seriously affecting their growth and development and therefore, its accurate regulation is essential. Recently, we discovered that phospholipase Dα1 (PLDα1) activity...

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Autores principales:	Daniela Kocourková, Kristýna Kroumanová, Tereza Podmanická, Michal Daněk, Jan Martinec
Formato:	article
Lenguaje:	EN
Publicado:	Frontiers Media S.A. 2021
Materias:	Arabidopsis thaliana magnesium homeostasis phospholipase D leaf senescence starch proline Plant culture SB1-1110
Acceso en línea:	https://doaj.org/article/c95463c2d08442998a163d26c87041ec
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spelling	oai:doaj.org-article:c95463c2d08442998a163d26c87041ec2021-12-01T01:24:41ZPhospholipase Dα1 Acts as a Negative Regulator of High Mg2+-Induced Leaf Senescence in Arabidopsis1664-462X10.3389/fpls.2021.770794https://doaj.org/article/c95463c2d08442998a163d26c87041ec2021-11-01T00:00:00Zhttps://www.frontiersin.org/articles/10.3389/fpls.2021.770794/fullhttps://doaj.org/toc/1664-462XMagnesium (Mg2+) is a macronutrient involved in essential cellular processes. Its deficiency or excess is a stress factor for plants, seriously affecting their growth and development and therefore, its accurate regulation is essential. Recently, we discovered that phospholipase Dα1 (PLDα1) activity is vital in the stress response to high-magnesium conditions in Arabidopsis roots. This study shows that PLDα1 acts as a negative regulator of high-Mg2+-induced leaf senescence in Arabidopsis. The level of phosphatidic acid produced by PLDα1 and the amount of PLDα1 in the leaves increase in plants treated with high Mg2+. A knockout mutant of PLDα1 (pldα1-1), exhibits premature leaf senescence under high-Mg2+ conditions. In pldα1-1 plants, higher accumulation of abscisic and jasmonic acid (JA) and impaired magnesium, potassium and phosphate homeostasis were observed under high-Mg2+ conditions. High Mg2+ also led to an increase of starch and proline content in Arabidopsis plants. While the starch content was higher in pldα1-1 plants, proline content was significantly lower in pldα1-1 compared with wild type plants. Our results show that PLDα1 is essential for Arabidopsis plants to cope with the pleiotropic effects of high-Mg2+ stress and delay the leaf senescence.Daniela KocourkováKristýna KroumanováTereza PodmanickáMichal DaněkJan MartinecFrontiers Media S.A.articleArabidopsis thalianamagnesium homeostasisphospholipase Dleaf senescencestarchprolinePlant cultureSB1-1110ENFrontiers in Plant Science, Vol 12 (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	Arabidopsis thaliana magnesium homeostasis phospholipase D leaf senescence starch proline Plant culture SB1-1110
spellingShingle	Arabidopsis thaliana magnesium homeostasis phospholipase D leaf senescence starch proline Plant culture SB1-1110 Daniela Kocourková Kristýna Kroumanová Tereza Podmanická Michal Daněk Jan Martinec Phospholipase Dα1 Acts as a Negative Regulator of High Mg2+-Induced Leaf Senescence in Arabidopsis
description	Magnesium (Mg2+) is a macronutrient involved in essential cellular processes. Its deficiency or excess is a stress factor for plants, seriously affecting their growth and development and therefore, its accurate regulation is essential. Recently, we discovered that phospholipase Dα1 (PLDα1) activity is vital in the stress response to high-magnesium conditions in Arabidopsis roots. This study shows that PLDα1 acts as a negative regulator of high-Mg2+-induced leaf senescence in Arabidopsis. The level of phosphatidic acid produced by PLDα1 and the amount of PLDα1 in the leaves increase in plants treated with high Mg2+. A knockout mutant of PLDα1 (pldα1-1), exhibits premature leaf senescence under high-Mg2+ conditions. In pldα1-1 plants, higher accumulation of abscisic and jasmonic acid (JA) and impaired magnesium, potassium and phosphate homeostasis were observed under high-Mg2+ conditions. High Mg2+ also led to an increase of starch and proline content in Arabidopsis plants. While the starch content was higher in pldα1-1 plants, proline content was significantly lower in pldα1-1 compared with wild type plants. Our results show that PLDα1 is essential for Arabidopsis plants to cope with the pleiotropic effects of high-Mg2+ stress and delay the leaf senescence.
format	article
author	Daniela Kocourková Kristýna Kroumanová Tereza Podmanická Michal Daněk Jan Martinec
author_facet	Daniela Kocourková Kristýna Kroumanová Tereza Podmanická Michal Daněk Jan Martinec
author_sort	Daniela Kocourková
title	Phospholipase Dα1 Acts as a Negative Regulator of High Mg2+-Induced Leaf Senescence in Arabidopsis
title_short	Phospholipase Dα1 Acts as a Negative Regulator of High Mg2+-Induced Leaf Senescence in Arabidopsis
title_full	Phospholipase Dα1 Acts as a Negative Regulator of High Mg2+-Induced Leaf Senescence in Arabidopsis
title_fullStr	Phospholipase Dα1 Acts as a Negative Regulator of High Mg2+-Induced Leaf Senescence in Arabidopsis
title_full_unstemmed	Phospholipase Dα1 Acts as a Negative Regulator of High Mg2+-Induced Leaf Senescence in Arabidopsis
title_sort	phospholipase dα1 acts as a negative regulator of high mg2+-induced leaf senescence in arabidopsis
publisher	Frontiers Media S.A.
publishDate	2021
url	https://doaj.org/article/c95463c2d08442998a163d26c87041ec
work_keys_str_mv	AT danielakocourkova phospholipaseda1actsasanegativeregulatorofhighmg2inducedleafsenescenceinarabidopsis AT kristynakroumanova phospholipaseda1actsasanegativeregulatorofhighmg2inducedleafsenescenceinarabidopsis AT terezapodmanicka phospholipaseda1actsasanegativeregulatorofhighmg2inducedleafsenescenceinarabidopsis AT michaldanek phospholipaseda1actsasanegativeregulatorofhighmg2inducedleafsenescenceinarabidopsis AT janmartinec phospholipaseda1actsasanegativeregulatorofhighmg2inducedleafsenescenceinarabidopsis
_version_	1718405988264968192

Phospholipase Dα1 Acts as a Negative Regulator of High Mg2+-Induced Leaf Senescence in Arabidopsis

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