Peroxisomal NADP-isocitrate dehydrogenase is required for Arabidopsis stomatal movement

Peroxisomes are subcellular organelles characterized by a simple morphological structure but have a complex biochemical machinery involved in signaling processes through molecules such as hydrogen peroxide (H₂O₂) and nitric oxide (NO). Nicotinamide adenine dinucleotide phosphate (NADPH) is an es...

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Bibliographic Details
Published in:Protoplasma 2016-03, Vol.253 (2), p.403-415
Main Authors: Leterrier, Marina, Juan B. Barroso, Raquel Valderrama, Juan C. Begara-Morales, Beatriz Sánchez-Calvo, Mounira Chaki, Francisco Luque, Benjamin Viñegla, José M. Palma, Francisco J. Corpas
Format: Article
Language:English
Subjects:
Arabidopsis
Arabidopsis - enzymology
Arabidopsis - ultrastructure
Arabidopsis Proteins - physiology
Biomedical and Life Sciences
biosynthesis
Cell Biology
enzymes
genes
guard cells
homeostasis
hydrogen peroxide
Isocitrate Dehydrogenase - physiology
isozymes
Life Sciences
NADP (coenzyme)
nitric oxide
Original Article
peroxisomes
Peroxisomes - enzymology
Plant Sciences
Plant Stomata - enzymology
Plant Stomata - physiology
stomatal movement
transfer DNA
Zoology
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Summary:Peroxisomes are subcellular organelles characterized by a simple morphological structure but have a complex biochemical machinery involved in signaling processes through molecules such as hydrogen peroxide (H₂O₂) and nitric oxide (NO). Nicotinamide adenine dinucleotide phosphate (NADPH) is an essential component in cell redox homeostasis, and its regeneration is critical for reductive biosynthesis and detoxification pathways. Plants have several NADPH-generating dehydrogenases, with NADP-isocitrate dehydrogenase (NADP-ICDH) being one of these enzymes. Arabidopsis contains three genes that encode for cytosolic, mitochondrial/chloroplastic, and peroxisomal NADP-ICDH isozymes although the specific function of each of these remains largely unknown. Using two T-DNA insertion lines of the peroxisomal NADP-ICDH designated as picdh-1 and picdh-2, the data show that the peroxisomal NADP-ICDH is involved in stomatal movements, suggesting that peroxisomes are a new element in the signaling network of guard cells.
ISSN:0033-183X
1615-6102
DOI:10.1007/s00709-015-0819-0