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Bioactive Gibberellins Show Differential Abundance at Key Phenological Stages for Berry Growth in Table Grapes

Gonzalo Ravest, Maribel Mamani, Lisa Giacomelli, Claudio Moser, Claudio Pastenes, Patricio Hinrichsen
Am J Enol Vitic. October 2017 68: 478-484; published ahead of print June 22, 2017 ; DOI: 10.5344/ajev.2017.16036
Gonzalo Ravest
1Instituto de Investigaciones Agropecuarias, INIA La Platina, Santiago 8831314, Chile
2Facultad de Ciencias Agronómicas, Universidad de Chile, Santiago 8820808, Chile
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Maribel Mamani
1Instituto de Investigaciones Agropecuarias, INIA La Platina, Santiago 8831314, Chile
2Facultad de Ciencias Agronómicas, Universidad de Chile, Santiago 8820808, Chile
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Lisa Giacomelli
3Research and Innovation Centre, Fondazione Edmund Mach, Via E. Mach 1, 38010 S. Michele all ‘Adige, (Trento - Italy)
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Claudio Moser
3Research and Innovation Centre, Fondazione Edmund Mach, Via E. Mach 1, 38010 S. Michele all ‘Adige, (Trento - Italy)
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Claudio Pastenes
2Facultad de Ciencias Agronómicas, Universidad de Chile, Santiago 8820808, Chile
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Patricio Hinrichsen
1Instituto de Investigaciones Agropecuarias, INIA La Platina, Santiago 8831314, Chile
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  • For correspondence: phinrichsen@inia.cl
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Abstract

Berry size is an important trait for table grape production and is affected by complex physiological and biochemical events that occur from anthesis to ripening. Gibberellins (GAs) play a crucial role in the regulation of this process, as widely demonstrated by exogenous application of gibberellin acid (GA3), but the endogenous change in concentration and its relationship with berry size are poorly understood. Using berries from a crossing of Ruby Seedless × Sultanina (R×S) with different phenotypes for berry and seed size, we analyzed GA metabolites at four key phenological stages for berry growth: 50% flowering (FL50), 2 to 4 mm (CU24), 2 to 4 mm plus one week (CU24+1), and 6 to 8 mm. Our results showed that both bioactive metabolites GA1 and GA4 were produced, demonstrating that both the 13-hydroxylation and the non-13-hydroxylation GA biosynthetic routes were functional in grape berries. The variable abundance of both bioactive GAs throughout berry growth suggests complex regulation of this pathway. GA1 had a higher concentration than GA4 during the FL50 to CU24+1 stages, whereas GA4 concentration increased later during the berry-setting stage and was relatively constant to the 6 to 8 mm stage. Accumulation of GA1 was greater than with GA4, with a three-fold higher concentration at CU24+1. In addition, our results suggested that synthesis of GAs occurred in small seedless berries, but accumulation of GA4 occurred slightly later than in larger berries with full seeds.

  • berry size
  • GC-MS
  • gibberellins
  • seed content
  • table grapes
  • Received March 2016.
  • Revision received January 2017.
  • Revision received May 2017.
  • Accepted May 2017.
  • ©2017 by the American Society for Enology and Viticulture
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Bioactive Gibberellins Show Differential Abundance at Key Phenological Stages for Berry Growth in Table Grapes
Gonzalo Ravest, Maribel Mamani, Lisa Giacomelli, Claudio Moser, Claudio Pastenes, Patricio Hinrichsen
Am J Enol Vitic.  October 2017  68: 478-484;  published ahead of print June 22, 2017 ; DOI: 10.5344/ajev.2017.16036

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Bioactive Gibberellins Show Differential Abundance at Key Phenological Stages for Berry Growth in Table Grapes
Gonzalo Ravest, Maribel Mamani, Lisa Giacomelli, Claudio Moser, Claudio Pastenes, Patricio Hinrichsen
Am J Enol Vitic.  October 2017  68: 478-484;  published ahead of print June 22, 2017 ; DOI: 10.5344/ajev.2017.16036
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