Phospholipase D alpha 1 Acts as a Negative Regulator of High Mg2+-Induced Leaf Senescence in Arabidopsis

0552850 - ÚEB 2022 RIV CH eng J - Článek v odborném periodiku
Kocourková, Daniela - Kroumanová, Kristýna - Podmanická, Tereza - Daněk, Michal - Martinec, Jan
Phospholipase D alpha 1 Acts as a Negative Regulator of High Mg2+-Induced Leaf Senescence in Arabidopsis.
Frontiers in Plant Science. Roč. 12, NOV 25 (2021), č. článku 770794. ISSN 1664-462X. E-ISSN 1664-462X
Grant CEP: GA ČR(CZ) GA17-00522S; GA MŠMT(CZ) EF16_019/0000738
Institucionální podpora: RVO:61389030
Klíčová slova: salt-stress-response * jasmonic acid * potassium-deficiency * abscisic-acid * magnesium homeostasis * proline accumulation * stomatal closure * plants * identification * suppression * Arabidopsis thaliana * magnesium homeostasis * phospholipase D * leaf senescence * starch * proline * abscisic acid * jasmonic acid
Obor OECD: Biochemical research methods
Impakt faktor: 6.627, rok: 2021
Způsob publikování: Open access
http://doi.org/10.3389/fpls.2021.770794

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 D alpha 1 (PLD alpha 1) activity is vital in the stress response to high-magnesium conditions in Arabidopsis roots. This study shows that PLD alpha 1 acts as a negative regulator of high-Mg2+-induced leaf senescence in Arabidopsis. The level of phosphatidic acid produced by PLD alpha 1 and the amount of PLD alpha 1 in the leaves increase in plants treated with high Mg2+. A knockout mutant of PLD alpha 1 (pld alpha 1-1), exhibits premature leaf senescence under high-Mg2+ conditions. In pld alpha 1-1 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 pld alpha 1-1 plants, proline content was significantly lower in pld alpha 1-1 compared with wild type plants. Our results show that PLD alpha 1 is essential for Arabidopsis plants to cope with the pleiotropic effects of high-Mg2+ stress and delay the leaf senescence.
Trvalý link: http://hdl.handle.net/11104/0327943