Alpha-amylase production is induced by sulfuric acid in rice aleurone cells.
The hydrolytic enzyme alpha-amylase (EC 3.2.1.1) is produced mainly in aleurone cells of germinating cereals, and the phytohormone gibberellin (GA) is essential for its induction. However, in rice (Oryza sativa L.), sulfuric acid (H(2)SO(4)) induces alpha-amylase production in aleurone tissue even in the absence of GA. Here, the pre-treatment of rice aleurone cells with H(2)SO(4) and incubation in water induced alpha-amylase activity, as if the cells had been incubated in GA solution.
Mitsunaga
Shin-ichiro
S
Faculty of Education, Joetsu University of Education, 1 Yamayashiki, Joetsu, Niigata, Japan. mitunaga@juen.ac.jp
Kobayashi
Midori
M
Fukui
Satoe
S
Fukuoka
Kayoko
K
Kawakami
Osamu
O
Yamaguchi
Junji
J
Ohshima
Masahiro
M
Mitsui
Toshiaki
T
D004790:Enzyme Induction / Q000187:drug effects; D005875:Gibberellins / Q000494:pharmacology; D012275:Oryza / Q000166:cytology / Q000187:drug effects* / Q000201:enzymology*; D012639:Seeds / Q000166:cytology / Q000187:drug effects / Q000201:enzymology; D013464:Sulfuric Acids / Q000494:pharmacology*; D000516:alpha-Amylases / Q000096:biosynthesis*
D005875:Gibberellins; D013464:Sulfuric Acids; C007842:gibberellic acid; D000516:alpha-Amylases; C033158:sulfuric acid