Cited 2 time in
Cited 2 time in
Calmodulin 1 Regulates Senescence and ABA Response in Arabidopsis
- Calmodulin 1 Regulates Senescence and ABA Response in Arabidopsis
- Dai, Cheng; Lee, Yuree; Lee, In C.; Nam, Hong Gil; Kwak, June Myoung
- DGIST Authors
- Nam, Hong Gil; Kwak, June Myoung
- Issue Date
- Frontiers in Plant Science, 9
- Article Type
- calmodulin 1; NADPH oxidase; reactive oxygen species; RPK1; senescence; INDUCED STOMATAL CLOSURE; NADPH OXIDASE ATRBOHD; LEAF SENESCENCE; ABSCISIC-ACID; HYDROGEN-PEROXIDE; RECEPTOR KINASE; GENE-EXPRESSION; NITRIC-OXIDE; GUARD-CELLS; CALCIUM
- Cellular calcium acts as a second messenger and regulates diverse developmental events and stress responses. Cytosolic calcium has long been considered as an important regulator of senescence, however, the role of Ca2+ in plant senescence has remained elusive. Here we show that the Calmodulin 1 (CaM1) gene, which encodes Ca2+-binding protein calmodulin 1, positively regulates leaf senescence in Arabidopsis. Yellowing of leaves, accumulation of reactive oxygen species (ROS), and expression of the senescence-associated gene 12 (SAG12) were significantly enhanced in CaM1 overexpression plants. In contrast, abscisic acid (ABA)-triggered ROS production and stomatal closure were reduced in amiRNA-CaM1 plants. We found a positive-feedback regulation loop among three signaling components, CaM1, RPK1, and RbohF, which physically associate with each other. RPK1 positively regulates the expression of the CaM1 gene, and the CaM1 protein, in turn, up-regulates RbohF gene expression. Interestingly, the expression of CaM1 was down-regulated in rbohD, rbohF, and rbohD/F mutants. We show that CaM1 positively regulates ROS production, leaf senescence, and ABA response in Arabidopsis. © 2018 Dai, Lee, Lee, Nam and Kwak.
- Frontiers Media S.A.
- Related Researcher
Kwak, June Myoung
KWAK_LAB(Lab of Cell Signailng & Development)
Calcium Signaling; ABA;ROS Signaling; drought-tolerant plants; Development of Abscission; Culluar Features; Signaling network; Environmental Regulation
- Department of New BiologyCBRG(Complex Biology Research Group)1. Journal Articles
Department of New BiologyKWAK_LAB(Lab of Cell Signailng & Development)1. Journal Articles
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