The ethylene signaling pathway has a negative impact on sucrose-induced anthocyanin accumulation in Arabidopsis.
In an attempt to understand the complex regulatory mechanisms underlying sucrose-induced flavonoid biosynthesis, we examined several Arabidopsis mutants with altered anthocyanin accumulation. We determined that disruption of ethylene signaling results in a dramatic increase in sucrose-induced anthocyanin accumulation. Furthermore, we investigated why the ein2-1 (ethylene insensitive) Arabidopsis mutant accumulates higher levels of anthocyanin in response to sucrose than wild-type Arabidopsis. An increased level of PAP1 transcript in the ein2-1 mutant appears to be the main factor responsible for the increased accumulation of anthocyanin in response to sucrose. Therefore, our results indicate that the ethylene signaling pathway plays a negative role in sucrose-induced anthocyanin accumulation. We believe that the explanation for this observation may be related to the initiation of the senescence program in plants.
Kwon
Yerim
Y
College of Life Sciences and Biotechnology, Korea University, 1, 5-ka Anam-dong, Sungbuk-ku, Seoul 136-713, Republic of Korea.
Oh
Jee Eun
JE
Noh
Hana
H
Hong
Suk-Whan
SW
Bhoo
Seong Hee
SH
Lee
Hojoung
H
D000217:Acyltransferases / Q000235:genetics / Q000378:metabolism; D000872:Anthocyanins / Q000378:metabolism*; D017360:Arabidopsis / Q000187:drug effects* / Q000201:enzymology / Q000235:genetics / Q000378:metabolism*; D029681:Arabidopsis Proteins / Q000235:genetics / Q000378:metabolism; D015152:Blotting, Northern; D002734:Chlorophyll / Q000378:metabolism; D005030:Ethylenes / Q000378:metabolism*; D018506:Gene Expression Regulation, Plant / Q000187:drug effects; D009154:Mutation / Q000235:genetics; D000073718:Pancreatitis-Associated Proteins; D012333:RNA, Messenger / Q000235:genetics / Q000378:metabolism; D015398:Signal Transduction / Q000187:drug effects*; D012835:Silver Nitrate / Q000494:pharmacology; D013395:Sucrose / Q000494:pharmacology*; D014157:Transcription Factors / Q000235:genetics / Q000378:metabolism
D000217:Acyltransferases; D000872:Anthocyanins; D029681:Arabidopsis Proteins; D002734:Chlorophyll; D005030:Ethylenes; D000073718:Pancreatitis-Associated Proteins; D012333:RNA, Messenger; D012835:Silver Nitrate; D013395:Sucrose; D014157:Transcription Factors; C502612:AT1G56650 protein, Arabidopsis; C000612141:REG3A protein, human; C036216:ethylene; C491135:AT5G13930 protein, Arabidopsis