Phosphorus acquisition efficiency and phosphorus remobilization mediate genotype-specific differences in shoot phosphorus content in grapevine. (3rd July 2018)

• Record Type: Journal Article
• Authors: Gautier, Antoine; Cookson, Sarah J; Hevin, Cyril; Vivin, Philippe; Lauvergeat, Virginie; Mollier, Alain
• Editors: Plomion, Christophe
• Is Part Of: Tree physiology. Volume 38:Number 11(2018)
• Page Start: 1742
• Page End: 1751
• Publication Date: 2018-07-03
• Subjects: 32P labelling -- Vitis vinifera -- Vitis spp; Trees -- Physiology -- Periodicals; 582.16
• DOI: 10.1093/treephys/tpy074
• Languages: English
• ISSNs: 0829-318X

Abstract

Abstract: Crop productivity is limited by phosphorus (P) and this will probably increase in the future. Rootstocks offer a means to increase the sustainability and nutrient efficiency of agriculture. It is known that rootstocks alter petiole P concentrations in grapevine. The objective of this work was to determine which functional processes are involved in genotype-specific differences in scion P content by quantifying P uptake, P remobilization from the reserves in the cutting and P allocation within the plant in three grapevine genotypes. Cuttings of two American rootstocks and one European scion variety were grown in sand and irrigated with a nutrient solution containing either high P (0.6 mM) or low P (0 mM). The high P solution was labelled with 32 P throughout the experiment. The grapevine genotypes studied show variation in the inhibition of shoot and root biomass in response to low P supply, and P supply also affected shoot, but not root, P concentrations. Genotype-specific differences in total P content were related to differences in P acquisition and utilization efficiencies (PAE and PUE, respectively). Phosphorus allocation within the plant was not affected by genotype or P supply. The rootstock genotype known to confer high petiole P content in the vineyard was associated with a high PAE under high P, and a high PUE under low P. This suggests that the petiole P concentrations in the vineyard are related to genotype-specific differences in PAE and PUE, and that these traits could be used for rootstock selection programmes in the future.