High temperature reduces apple fruit colour via modulation of the anthocyanin regulatory complex

Lin-Wang, K., Micheletti, D., Palmer, J., Volz, R., Lozano, L., Espley, R., Hellens, R.P., Chagnè, D., Rowan, D.D., Troggio, M., Iglesias, I., & Allan, A.C. (2011) High temperature reduces apple fruit colour via modulation of the anthocyanin regulatory complex. Plant, Cell and Environment, 34(7), pp. 1176-1190.

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The biosynthesis of anthocyanin in many plants is affected by environmental conditions. In apple (Malus×domestica Borkh.), concentrations of fruit anthocyanins are lower under hot climatic conditions. We examined the anthocyanin accumulation in the peel of maturing 'Mondial Gala' and 'Royal Gala' apples, grown in both temperate and hot climates, and using artificial heating of on-tree fruit. Heat caused a dramatic reduction of both peel anthocyanin concentration and transcripts of the genes of the anthocyanin biosynthetic pathway. Heating fruit rapidly reduced expression of the R2R3 MYB transcription factor (MYB10) responsible for coordinative regulation for red skin colour, as well as expression of other genes in the transcriptional activation complex. A single night of low temperatures is sufficient to elicit a large increase in transcription of MYB10 and consequently the biosynthetic pathway. Candidate genes that can repress anthocyanin biosynthesis did not appear to be responsible for reductions in anthocyanin content. We propose that temperature-induced regulation of anthocyanin biosynthesis is primarily caused by altered transcript levels of the activating anthocyanin regulatory complex.

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ID Code: 71448
Item Type: Journal Article
Refereed: Yes
Additional Information: Cited By (since 1996):27 Export Date: 6 May 2014 Source: Scopus PubMed ID: 21410713
Additional URLs:
Keywords: Malus×domestica, MYB, Transcriptional regulation
DOI: 10.1111/j.1365-3040.2011.02316.x
ISSN: 1365-3040
Deposited On: 12 May 2014 23:37
Last Modified: 19 May 2014 06:22

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