Phenolics and condensed tannins of high altitude Pteridium arachnoideum in relation to sunlight exposure, elevation, and rain regime
By M. Alonso-amelot, A. Oliveros-Bastidas, M. P. Calcagno-Pisarelli. 2007
114 citations recorded by the source corpus.
Abstract Non-adapted plants growing in high altitude such as bracken fern Pteridium arachnoideum are exposed to environmental extremes that may induce a chemical adaptive response. Here we show that there is a non-uniform distribution of low (LMP) and high molecular weight (HMP) phenolics in the frond parts of P. arachnoideum growing at high elevation. LMP–HMP levels were measured in sun-exposed (E) and self shaded (SS) pinnae between 2100 and 3190 m in the tropical Andes, during dry and rainy seasons. While there was no difference in E vs. SS contents of LMP at 2100 m, E accumulated greater LMP–HMP concentrations relative to SS as altitude increased. This difference was increased during the dry season. Linear correlations between the position of each pinnae relative to the ground level and LMP–HMP occurred along a 2570–3190 m transect. Water restriction in the dry season also caused increase of LMP and HMP. We conclude that excess UV-B radiation and water availability are important modelers of the non-adapted plant acclimation response to stress in tropical high mountain habitats.
Subfields: Biochemistry, Molecular Biology, Plant Science
View Paper: https://www.semanticscholar.org/paper/d2dd6d453919035847978bd7d150faf7fb8a2438
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In Biochemistry
In Molecular Biology
In Plant Science
Citations in the corpus
- Altitudinal variation of secondary metabolites in flowering heads of the Asteraceae: trends and causes (2010, background): “The second theory was supported by studies on the ferns Pteridium arachoideum (Kaulf.) Maxon and Pteridium caudatum (L.) Maxon, which contained higher amounts of photo-protective and radical scavenging phenolics in higher altitude sites than in lower growing stands ( Alonso-Amelot et al. 2004, 2007 ”