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Title: Organic acid analysis and plant water status of two Aechmea cultivars grown under greenhouse conditions: implications on leaf quality
Authors: Londers, Elsje ×
Ceusters, Johan
Vervaeke, Ine
Deroose, R
De Proft, MP #
Issue Date: Jun-2005
Publisher: Elsevier science bv
Series Title: Scientia horticulturae vol:105 issue:2 pages:249-262
Abstract: Bromeliad growers report severe leaf quality problems for Aechmea cultivars grown under commercial greenhouse conditions. In this research, a leaf damage 'sensitive' and 'insensitive' A. cultivar were compared for their C-metabolism and hydrophysiology under these greenhouse conditions. Stomata opening index indicated CAM (Crassulacean acid metabolism) for both cultivars, with 45-50% open stomata around 4:00 a.m. and 5-10% in the afternoon. Malic and citric acid were the major organic acids present in the leaves, with diurnal malic acid accumulation during the night. The leaf damage 'sensitive' cultivar showed higher malic acid accumulation than the 'insensitive' cultivar (200 μ mol/gfw versus 170 μ mol/gfw). Leaf osmotic potential and turgor pressure were linked with diurnal malic acid fluctuations: organic acid accumulation during the night generated high leaf turgor pressures (up to +0.86 MPa).
ISSN: 0304-4238
Publication status: published
KU Leuven publication type: IT
Appears in Collections:Division of Crop Biotechnics
× corresponding author
# (joint) last author

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