Abstract
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.
Original language | English |
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Pages (from-to) | 193-200 |
Number of pages | 8 |
Journal | Journal of Plant Research |
Volume | 124 |
Issue number | 1 |
DOIs | |
Publication status | Published - 2011 |
Keywords
- Anthocyanin
- Arabidopsis thaliana
- EIN2
- PAP1
- Sucrose
ASJC Scopus subject areas
- Plant Science