Leaf micro-environment influence the altered foliar phenotype of columnar apple (Malus x domestica Borkh.) trees
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Leaf micro-environment influence the altered foliar phenotype of columnar apple (Malus x domestica Borkh.) trees. / Talwara, Susheela; Grout, Brian William Wilson; Toldam-Andersen, Torben Bo.
In: Acta Horticulturae, Vol. 1099, 2015, p. 835-841.Research output: Contribution to journal › Conference article › Research › peer-review
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TY - GEN
T1 - Leaf micro-environment influence the altered foliar phenotype of columnar apple (Malus x domestica Borkh.) trees
AU - Talwara, Susheela
AU - Grout, Brian William Wilson
AU - Toldam-Andersen, Torben Bo
N1 - Conference code: 2
PY - 2015
Y1 - 2015
N2 - 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.
AB - 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.
KW - ???Frugtavl???
KW - carbon fixation
M3 - Conference article
VL - 1099
SP - 835
EP - 841
JO - Acta Horticulturae
JF - Acta Horticulturae
SN - 0567-7572
Y2 - 1 July 2012 through 5 July 2012
ER -
ID: 153787370