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Leaf micro-environment influence the altered foliar phenotype of columnar apple (Malus x domestica Borkh.) trees

Publikation: Bidrag til tidsskriftKonferenceartikelForskningfagfællebedømt

Columnar apple trees (CATs) have radically-altered architecture (significantly shorter internodes and lateral branches) when compared to standard apple trees, attributed to a mutation of the Co gene involved in apical dominance. These changes in architecture have been associated with changes in the phenotype of the leaves in the leaf clusters that subtend the fruits of CATs, compared to their standard counterparts. This initial investigation considers standard and columnar trees at different levels of genetic relatedness and records significant increases in leaf area, leaf mass per unit area, chlorophyll content and competitive shading in the fruiting leaf clusters of columnar cultivars. Additionally, significant increases in intercepted light have been shown to be associated with the columnar structure, and carbon fixation is also increased. We propose that leaf micro-environment of columnar cultivars is altered in terms of incident light by their open architecture and this influences the growth and development of the leaves in the fruiting leaf clusters. Interaction with their modified genetic condition produces a foliar phenotype characteristic of CATs.
OriginalsprogEngelsk
TidsskriftActa Horticulturae
Vol/bind1099
Sider (fra-til)835-841
Antal sider7
ISSN0567-7572
StatusUdgivet - 2015
BegivenhedInternational Symposium on Horticulture in Europe - Anger, Frankrig
Varighed: 1 jul. 20125 jul. 2012
Konferencens nummer: 2

Konference

KonferenceInternational Symposium on Horticulture in Europe
Nummer2
LandFrankrig
ByAnger
Periode01/07/201205/07/2012

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