Title: Impact of developmental stage on CAM expression and growth in an Aechmea hybrid under greenhouse conditions
Authors: Ceusters, Johan ×
Londers, Elsje
Verdoodt, Veerle
Ceusters, Nathalie
Godts, Christof
De Proft, Maurice #
Issue Date: Jul-2009
Publisher: Headley Brothers Ltd.
Series Title: The Journal of Horticultural Science & Biotechnology vol:84 issue:4 pages:399-402
Abstract: Besides environmental factors, expression of crassulacean acid metabolism (CAM) and the related production of
malic acid may depend on plant developmental stage. This topic has not yet been investigated under commercial
greenhouse conditions. In CAM plant cultivation, malic acid is a central determinant of plant growth, but can also
cause physiological leaf damage problems. Here, we present data on diurnal leaf malic acid contents, relative water
content dynamics, and measurements of growth at four stages of the plant growth cycle (i.e., ex vitro-acclimated
plantlets, 6-month, 12-month, and 18-month-old plants) of Aechmea ‘Maya’. The results obtained showed that
Aechmea ‘Maya’ was an obligate CAM plant at all developmental stages during cultivation. Nevertheless, there was some developmental control on the expression of CAM. Under the same environmental conditions, 6-month-old
plants accumulated significantly higher amounts of malic acid in their leaves, thus supporting higher growth rates, than in the other growth stages. This larger malic acid pool implied a higher risk of physiological leaf damage, but since remobilisation of malic acid in the early morning remained unaffected during growth, physiological leaf damage might occur throughout vegetative growth.
ISSN: 1462-0316
Publication status: published
KU Leuven publication type: IT
Appears in Collections:Division of Crop Biotechnics
Administrative and Support Services, Faculty of Engineering
Biosystems - miscellaneous
Bioengineering Technology TC, Technology Campus Geel
Technologiecluster Bioengineering Technologie
× corresponding author
# (joint) last author

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