Gibberellin treatment allows to control bunch architecture and berry size in grapevine (Vitis vinifera). Applications of gibberellic acid (GA3) at bloom result in reduced fruit set, which in turn produces bunches that are less dense, better aerated and, thus, less prone to fungal attack. This treatment is currently applied to wine cultivars with thick bunches such those belonging to the Pinot family, where fruit set and yield reductions remain moderate and are compensated by harvesting of healthier grapes. However, in some cultivars such as Sauvignon Blanc or Gewürztraminer a reduction of fertility is observed in the years following the one of the treatment in addition to decreased fruit set. In this work we studied the response to GA3 treatment in Pinot Gris and Sauvignon Blanc at a morphological level, and at the molecular level through different approaches: 1) Analysis of the accumulation of the endogenous gibberellins by their quantification in inflorescences, and by characterization of the gibberellin oxidase gene family in grapevine, which may control the pool of active gibberellins in vivo. 2) Global transcript gene expression analysis in treated and non treated inflorescences in the two cultivars examined. Elements of a cultivar-specific response to GA3 will be discussed.
|Citation:||Giacomelli, L.; Caputi, L.; Masuero, D.; Vrhovsek, U.; Wehrens, R.; Moser C. (2012). The molecular response to Gibberellins in different Vitis vinifera cultivars. In: Plant Biology Congress Freiburg 2012 - jointly organised by FESPB and EPSO, 29 July-3 August, 2012, Germany. url: http://www.epsoweb.org/plant-biology-freiburg-2012-joint-fespbepso-conference-29-july-3-august-2012-germany handle: http://hdl.handle.net/10449/21995|
|Organization unit:||Genomics and Biology of Fruit Crops Department # CRI_2011-JAN2016|
Computational Biology # CRI_2011-JAN2016
|Authors:||Giacomelli, L.; Caputi, L.; Masuero, D.; Vrhovsek, U.; Wehrens, R.; Moser C.|
|Title:||The molecular response to Gibberellins in different Vitis vinifera cultivars|
|Scientific Disciplinary Area:||Settore BIO/04 - Fisiologia Vegetale|
|Appears in Collections:||03 - Conference object|