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.

Lin Wang, K.; Micheletti, D.; Palmer, J.; Volz, R.; Lozano, L.; Espley, R.; Hellens, R.P.; Chagne, 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): 1176-1190. doi: 10.1111/j.1365-3040.2011.02316.x handle: http://hdl.handle.net/10449/20229

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

Micheletti, Diego;Troggio, Michela;
2011-01-01

Abstract

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.
Malus x domestica
MYB
Transcriptional regulation
Settore AGR/13 - CHIMICA AGRARIA
2011
Lin Wang, K.; Micheletti, D.; Palmer, J.; Volz, R.; Lozano, L.; Espley, R.; Hellens, R.P.; Chagne, 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): 1176-1190. doi: 10.1111/j.1365-3040.2011.02316.x handle: http://hdl.handle.net/10449/20229
File in questo prodotto:
File Dimensione Formato  
2011 PCE Troggio.pdf

solo utenti autorizzati

Licenza: Tutti i diritti riservati (All rights reserved)
Dimensione 1.8 MB
Formato Adobe PDF
1.8 MB Adobe PDF   Visualizza/Apri   Richiedi una copia

I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.

Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/10449/20229
Citazioni
  • ???jsp.display-item.citation.pmc??? ND
  • Scopus 321
  • ???jsp.display-item.citation.isi??? 285
social impact