Induction of mitochondrial aldehyde dehydrogenase by submergence facilitates oxidation of acetaldehyde during re-aeration in rice.
Post-hypoxic injuries in plants are primarily caused by bursts of reactive oxygen species and acetaldehyde. In agreement with previous studies, we found accumulations of acetaldehyde in rice during re-aeration following submergence. During re-aeration, acetaldehyde-oxidizing aldehyde dehydrogenase (ALDH) activity increased, thereby causing the acetaldehyde content to decrease in rice. Interestingly, re-aerated rice plants showed an intense mitochondrial ALDH2a protein induction, even though ALDH2a mRNA was submergence induced and declined upon re-aeration. This suggests that rice ALDH2a mRNA is accumulated in order to quickly metabolize acetaldehyde that is produced upon re-aeration.
Tsuji
Hiroyuki
H
Laboratory of Plant Molecular Genetics, Graduate School of Agricultural and Life Sciences, The University of Tokyo, 1-1-1 Yayoi, Bunkyo-ku, Tokyo 97403-1229, Japan.
Meguro
Naoki
N
Suzuki
Yasuhiro
Y
Tsutsumi
Nobuhiro
N
Hirai
Atsushi
A
Nakazono
Mikio
M
D000079:Acetaldehyde / Q000378:metabolism*; D000444:Aldehyde Dehydrogenase / Q000096:biosynthesis* / Q000235:genetics / Q000378:metabolism; D015971:Gene Expression Regulation, Enzymologic; D018506:Gene Expression Regulation, Plant; D008928:Mitochondria / Q000201:enzymology*; D012275:Oryza / Q000201:enzymology / Q000235:genetics / Q000378:metabolism*; D010084:Oxidation-Reduction
D000444:Aldehyde Dehydrogenase; D000079:Acetaldehyde