| Solar UV-B radiation affects leaf quality and insect herbivory in the southern beech tree Nothofagus antarctica. | |
| | |
MedLine Citation:
|
PMID: 14740287 Owner: NLM Status: MEDLINE |
Abstract/OtherAbstract:
|
We examined the effects of solar ultraviolet-B (UV-B) radiation on plant-insect interactions in Tierra del Fuego (55 degrees S), Argentina, an area strongly affected by ozone depletion because of its proximity to Antarctica. Solar UV-B under Nothofagus antarctica branches was manipulated using a polyester plastic film to attenuate UV-B (uvb-) and an Aclar film to provide near-ambient UV-B (uvb+). The plastic films were placed on both north-facing (i.e., high solar radiation in the Southern Hemisphere) and south-facing branches. Insects consumed 40% less leaf area from north- than from south-facing branches, and at least 30% less area from uvb+ branches than from uvb- branches. The reduced herbivory on leaves from uvb+ branches occurred for both branch orientations. Leaf mass per area increased and relative water content decreased on north- versus south-facing branches, while no differences were apparent between the UV-B treatments. Solar UV-B did lead to lower gallic acid concentration and higher flavonoid aglycone concentration in uvb+ leaves relative to uvb- leaves. Both the flavonoid aglycone and quercetin-3-arabinopyranoside were higher on north-facing branches. In laboratory preference experiments, larvae of the dominant insect in the natural community, Geometridae "Brown" (Lepidoptera), consumed less area from field-grown uvb+ leaves than from uvb- leaves in 1996-97, but not in 1997-98. Correlation analyses suggested that the reduction in insect herbivory in the field under solar UV-B may be mediated in part by the UV-B effects on gallic acid and flavonoid aglycone. |
| | |
Authors:
|
M Cecilia Rousseaux; Riitta Julkunen-Tiitto; Peter S Searles; Ana L Scopel; Pedro J Aphalo; Carlos L Ballaré |
Related Documents
:
|
16041127 - Acidolysis between triolein and short-chain fatty acid by lipase in organic solvents. 6270057 - Adenosine 5'-triphosphate- yielding pathways of branched-chain amino acid fermentation ... 8606127 - Calixarenes with host-mediated potency in experimental tuberculosis: further evidence t... 23522537 - The antioxidant property of pachymic acid improves bone disturbance against ah plus-ind... 9066257 - The evolution of ribonucleotide reduction. 604287 - Side reactions in peptide synthesis. v.a reexamination of the mixed anhydride method. |
Publication Detail:
|
Type: Journal Article; Research Support, Non-U.S. Gov't; Research Support, U.S. Gov't, Non-P.H.S. Date: 2004-01-22 |
Journal Detail:
|
Title: Oecologia Volume: 138 ISSN: 0029-8549 ISO Abbreviation: Oecologia Publication Date: 2004 Mar |
Date Detail:
|
Created Date: 2004-03-25 Completed Date: 2004-05-07 Revised Date: 2006-11-15 |
Medline Journal Info:
|
Nlm Unique ID: 0150372 Medline TA: Oecologia Country: Germany |
Other Details:
|
Languages: eng Pagination: 505-12 Citation Subset: IM |
Affiliation:
|
IFEVA, Consejo Nacional de Investigaciones Científicas y Técnicas and Universidad de Buenos Aires, Av. San Martín 4453, C1417 DSE, Buenos Aires, Argentina. |
Export Citation:
|
APA/MLA Format Download EndNote Download BibTex |
| MeSH Terms | |
Descriptor/Qualifier:
|
Animals Antarctic Regions Ecosystem* Insects / physiology* Larva / physiology Plant Leaves / chemistry, radiation effects Sunlight Trees / radiation effects* Ultraviolet Rays* |
From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine
Previous Document: Hemichorea with antiphospholipid antibodies in a patient with lupus nephritis.
Next Document: Seed dispersal by white-tailed deer: implications for long-distance dispersal, invasion, and migrati...