Journal
PLANT PHYSIOLOGY
Volume 176, Issue 1, Pages 340-351Publisher
AMER SOC PLANT BIOLOGISTS
DOI: 10.1104/pp.17.01019
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Funding
- National Science Foundation (NSF) [IOS-1453750]
- United States Department of Agriculture-National Institute of Food and Agriculture Fellowship Program [2016-67011-25096]
- National Institutes of Health (NIH) [R01 GM112898]
- Direct For Biological Sciences
- Division Of Integrative Organismal Systems [1453750] Funding Source: National Science Foundation
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Peroxisomes are small organelles that house many oxidative reactions. Peroxisome proliferation is induced under multiple stress conditions, including salt stress; however, factors regulating this process are not well defined. We have identified a role for Arabidopsis (Arabidopsis thaliana) MAP KINASE17 (MPK17) in affecting peroxisome division in a manner that requires the known peroxisome division factor PEROXISOME AND MITOCHONDRIAL DIVISION FACTOR1 (PMD1). MPK17 and PMD1 are involved in peroxisome proliferation in response to NaCl stress. Additionally, we found that PMD1 is an actin-binding protein and that a functioning actin cytoskeleton is required for NaCl-induced peroxisome division. Our data suggest roles for MPK17 and PMD1 in influencing the numbers and cellular distribution of peroxisomes through the cytoskeleton-peroxisome connection. These findings expand our understanding of peroxisome division and potentially identify factors connecting the actin cytoskeleton and peroxisome proliferation.
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