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Title: Genotype-specific responses of Bromus erectus to elevated CO{sub 2} at different levels of biodiversity and endophyte infection - a field experiment

In 1994 we initiated a long-term field experiment in a calcareous grassland to study the effects of elevated CO{sub 2} on individuals, populations, and communities. Clonal replicates of 54 genotypes of the dominant grass Bromus erectus were grown in communities planted at three levels of biodiversity (5-, 12-, 31-species plots) and exposed to ambient and elevated CO{sub 2}. The same genotypes were also individually grown in tubes within the field plots. Some genotypes were infected by the endophytic fungus Epichloee typhina. Elevated CO{sub 2} had no significant effects on plant growth, however, there was large variation among genotypes in all measured characters. A significant CO{sub 2}-by-genotype interaction was found for leaf length in the competition-free tubes. Infection by the endophyte led to the abortion of all inflorescences but increased vegetative growth, especially under competitive conditions.
Authors:
; ;  [1]
  1. Univ. of Basel (Switzerland)|[Univ. of Zurich (Switzerland)
Publication Date:
OSTI Identifier:
95887
Report Number(s):
CONF-9507129-
Journal ID: BECLAG; ISSN 0012-9623; TRN: 95:004728-0155
Resource Type:
Journal Article
Resource Relation:
Journal Name: Bulletin of the Ecological Society of America; Journal Volume: 76; Journal Issue: 2; Conference: 80. anniversary of the transdisciplinary nature of ecology, Snowbird, UT (United States), 30 Jul - 3 Aug 1995; Other Information: PBD: Jun 1995
Country of Publication:
United States
Language:
English
Subject:
56 BIOLOGY AND MEDICINE, APPLIED STUDIES; GRAMINEAE; GENETIC VARIABILITY; RESPONSE MODIFYING FACTORS; CARBON DIOXIDE; ECOLOGICAL CONCENTRATION; BIOLOGICAL EFFECTS; SPECIES DIVERSITY; FUNGAL DISEASES