Glucose modulates the abscisic acid-inducible Rab16A gene in cereal embryos.
Glucose effects on the expression of the abscisic acid-inducible Rab16A gene were examined in rice and barley embryos. Glucose feeding to rice embryos negatively affects the endogenous abscisic acid content and represses the promoter activity of the Rab16A gene. Glucose repression of the Rab16A gene takes place both at a transcriptional and a post-transcriptional level. Modulation of the abscisic acid content in rice embryos triggered by glucose did not directly influence the expression of the rice alpha-amylase gene RAmy3D, which is known to be under glucose control. The possible interaction between the glucose and abscisic acid signaling pathway is discussed.
Toyofuku
K
K
Bioscience Center and Graduate School of Bioagricultural Sciences, Nagoya University, Chikusa, Japan.
Loreti
E
E
Vernieri
P
P
Alpi
A
A
Perata
P
P
Yamaguchi
J
J
D000040:Abscisic Acid / Q000378:metabolism / Q000502:physiology*; D046508:Culture Techniques; D002523:Edible Grain / Q000187:drug effects* / Q000196:embryology / Q000235:genetics; D015971:Gene Expression Regulation, Enzymologic / Q000187:drug effects; D018506:Gene Expression Regulation, Plant / Q000187:drug effects; D005947:Glucose / Q000494:pharmacology*; D006360:Heat-Shock Proteins / Q000235:genetics*; D001467:Hordeum / Q000187:drug effects / Q000196:embryology / Q000235:genetics; D012275:Oryza / Q000187:drug effects / Q000196:embryology / Q000235:genetics; D010940:Plant Proteins / Q000235:genetics; D020871:RNA Stability / Q000187:drug effects; D012333:RNA, Messenger / Q000187:drug effects / Q000235:genetics / Q000378:metabolism; D012639:Seeds / Q000187:drug effects* / Q000235:genetics / Q000378:metabolism; D014158:Transcription, Genetic / Q000187:drug effects; D000516:alpha-Amylases / Q000235:genetics
D006360:Heat-Shock Proteins; D010940:Plant Proteins; D012333:RNA, Messenger; C491169:Rab16A protein, Hordeum vulgare; C102591:Rab16A protein, Oryza sativa; D000040:Abscisic Acid; D000516:alpha-Amylases; D005947:Glucose