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Distinct regulation in inflorescence carbohydrate metabolism according to grapevine cultivars during floral development.
- Source :
-
Physiologia plantarum [Physiol Plant] 2015 Jul; Vol. 154 (3), pp. 447-67. Date of Electronic Publication: 2015 Feb 04. - Publication Year :
- 2015
-
Abstract
- Carbohydrate metabolism is important in plant sexual reproduction because sugar contents are determining factors for both flower initiation and floral organ development. In woody plants, flowering represents the most energy-consuming step crucial to reproductive success. Nevertheless, in these species, the photosynthesis performed by flowers supplies the carbon required for reproduction. In grapevine (Vitis vinifera), the inflorescence has a specific status because this organ imports carbohydrates at the same time as it exports photoassimilates. In this study, fluctuations in carbohydrate metabolism were monitored by analyzing gas exchanges, photosynthetic electron transport capacity, carbohydrate contents and some activities of carbohydrate metabolism enzymes, in the inflorescences of Pinot noir and Gewurztraminer, two cultivars with a different sensitivity to coulure phenomenon. Our results showed that photosynthetic activity and carbohydrate metabolism are clearly different and differently regulated during the floral development in the two cultivars. Indeed, the regulation of the linear electron flow and the cyclic electron flow is not similar. Moreover, the regulation of PSII activity, with a higher Y(NPQ)/Y(NO) ratio in Gewurztraminer, can be correlated with the higher protection of the photosynthetic chain and consequently with the higher yield under optimal conditions of this cultivar. At least, our results showed a higher photosynthetic activity and a better protection of PSI in Pinot noir during the floral development.<br /> (© 2015 Scandinavian Plant Physiology Society.)
- Subjects :
- Analysis of Variance
Carbohydrate Metabolism genetics
Flowers genetics
Flowers growth & development
Fructose metabolism
Gene Expression Regulation, Developmental
Gene Expression Regulation, Plant
Glucose metabolism
Inflorescence genetics
Inflorescence growth & development
Photosynthesis genetics
Photosynthesis physiology
Photosystem I Protein Complex genetics
Photosystem I Protein Complex metabolism
Photosystem II Protein Complex genetics
Photosystem II Protein Complex metabolism
Plant Proteins genetics
Plant Proteins metabolism
Reverse Transcriptase Polymerase Chain Reaction
Ribulose-Bisphosphate Carboxylase genetics
Ribulose-Bisphosphate Carboxylase metabolism
Species Specificity
Starch metabolism
Sucrose metabolism
Vitis classification
Vitis genetics
alpha-Amylases genetics
alpha-Amylases metabolism
beta-Amylase genetics
beta-Amylase metabolism
Carbohydrate Metabolism physiology
Flowers metabolism
Inflorescence metabolism
Vitis metabolism
Subjects
Details
- Language :
- English
- ISSN :
- 1399-3054
- Volume :
- 154
- Issue :
- 3
- Database :
- MEDLINE
- Journal :
- Physiologia plantarum
- Publication Type :
- Academic Journal
- Accession number :
- 25585972
- Full Text :
- https://doi.org/10.1111/ppl.12321