Journal
JOURNAL OF PLANT RESEARCH
Volume 124, Issue 1, Pages 193-200Publisher
SPRINGER JAPAN KK
DOI: 10.1007/s10265-010-0354-1
Keywords
Anthocyanin; Arabidopsis thaliana; EIN2; PAP1; Sucrose
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Funding
- National Research Foundation [2009-0078046, 2009-0065693]
- Ministry for Food, Agriculture, Forestry and Fisheries, Republic of Korea [108066-3]
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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.
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