FournierPareButtoEtAl2021

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Fournier, M.-P., Paré, M.C., Butto, V., Delagrange, S., Lafond, J., Deslauriers, A. (2021) How plant allometry influences bud phenology and fruit yield in two Vaccinium species. Annals of Botany, 126(5):825-835. (Scopus )

Résumé

Background and Aims Understanding how plant allometry, plant architecture and phenology contribute to fruit production can identify those plant traits that maximize fruit yield. In this study, we compared these variables and fruit yield for two shrub species, Vaccinium angustifolium and Vaccinium myrtilloides, to test the hypothesis that phenology is linked to the plants' allometric traits, which are predictors of fruit production. • Methods We measured leaf and flower phenology and the above-ground biomass of both Vaccinium species in a commercial wild lowbush blueberry field (Quebec, Canada) over a 2-year crop cycle; 1 year of pruning followed by 1 year of harvest. Leaf and flower phenology were measured, and the allometric traits of shoots and buds were monitored over the crop cycle. We hand-collected the fruits of each plant to determine fruit attributes and biomass. • Key Results During the harvesting year, the leafing and flowering of V. angustifolium occurred earlier than that of V. myrtilloides. This difference was related to the allometric characteristics of the buds due to differences in carbon partitioning by the plants during the pruning year. Through structural equation modelling, we identified that the earlier leafing in V. angustifolium was related to a lower leaf bud number, while earlier flowering was linked to a lower number of flowers per bud. Despite differences in reproductive allometric traits, vegetative biomass still determined reproductive biomass in a log-log scale model. • Conclusions Growing buds are competing sinks for non-structural carbohydrates. Their differences in both number and characteristics (e.g. number of flowers per bud) influence levels of fruit production and explain some of the phenological differences observed between the two Vaccinium species. For similar above-ground biomass, both Vaccinium species had similar reproductive outputs in terms of fruit biomass, despite differences in reproductive traits such as fruit size and number. © The Author(s) 2020. Published by Oxford University Press on behalf of the Annals of Botany Company. All rights reserved. For permissions, please e-mail: journals.permissions@oup.com.

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@ARTICLE { FournierPareButtoEtAl2021,
    AUTHOR = { Fournier, M.-P. and Paré, M.C. and Butto, V. and Delagrange, S. and Lafond, J. and Deslauriers, A. },
    JOURNAL = { Annals of Botany },
    TITLE = { How plant allometry influences bud phenology and fruit yield in two Vaccinium species },
    YEAR = { 2021 },
    NOTE = { cited By 3 },
    NUMBER = { 5 },
    PAGES = { 825-835 },
    VOLUME = { 126 },
    ABSTRACT = { Background and Aims Understanding how plant allometry, plant architecture and phenology contribute to fruit production can identify those plant traits that maximize fruit yield. In this study, we compared these variables and fruit yield for two shrub species, Vaccinium angustifolium and Vaccinium myrtilloides, to test the hypothesis that phenology is linked to the plants' allometric traits, which are predictors of fruit production. • Methods We measured leaf and flower phenology and the above-ground biomass of both Vaccinium species in a commercial wild lowbush blueberry field (Quebec, Canada) over a 2-year crop cycle; 1 year of pruning followed by 1 year of harvest. Leaf and flower phenology were measured, and the allometric traits of shoots and buds were monitored over the crop cycle. We hand-collected the fruits of each plant to determine fruit attributes and biomass. • Key Results During the harvesting year, the leafing and flowering of V. angustifolium occurred earlier than that of V. myrtilloides. This difference was related to the allometric characteristics of the buds due to differences in carbon partitioning by the plants during the pruning year. Through structural equation modelling, we identified that the earlier leafing in V. angustifolium was related to a lower leaf bud number, while earlier flowering was linked to a lower number of flowers per bud. Despite differences in reproductive allometric traits, vegetative biomass still determined reproductive biomass in a log-log scale model. • Conclusions Growing buds are competing sinks for non-structural carbohydrates. Their differences in both number and characteristics (e.g. number of flowers per bud) influence levels of fruit production and explain some of the phenological differences observed between the two Vaccinium species. For similar above-ground biomass, both Vaccinium species had similar reproductive outputs in terms of fruit biomass, despite differences in reproductive traits such as fruit size and number. © The Author(s) 2020. Published by Oxford University Press on behalf of the Annals of Botany Company. All rights reserved. For permissions, please e-mail: journals.permissions@oup.com. },
    AFFILIATION = { Laboratoire d'écologie végétale et Animale, Département des Sciences Fondamentales, Université du Québec à Chicoutimi, 555 Boulevard de l'Université, Chicoutimi, QC G7H 2B1, Canada; Département des Sciences Naturelles, Université du Québec en Outaouais, 283 Boulevard Alexandre-Taché, Gatineau, QC J8X 3X7, Canada; Agriculture et Agroalimentaire Canada, Gouvernement du Canada, 1468 Rue Saint-Cyrille, Normandin, QC G8M 4K3, Canada },
    AUTHOR_KEYWORDS = { Carbon allocation; Fruit production; Phenology; Plant allometry; Plant architecture; Plant biomass; Vaccinium angustifolium; Vaccinium myrtilloides },
    DOCUMENT_TYPE = { Article },
    DOI = { 10.1093/AOB/MCAA083 },
    SOURCE = { Scopus },
    URL = { https://www.scopus.com/inward/record.uri?eid=2-s2.0-85092636120&doi=10.1093%2fAOB%2fMCAA083&partnerID=40&md5=4ba59693fdbe1d3360228ac3039ef97c },
}

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