Mueller, Benedikt and Bartelheimer, Maik (2013) Interspecific competition in Arabidopsis thaliana: root hairs are important for competitive effect, but not for competitive response. PLANT AND SOIL, 371 (1-2). pp. 167-177. ISSN 0032-079X,
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The role of root hairs in intraspecific competition for Phosporus (P) is well examined, but their importance during interaction with other plant species is unknown, as is the differential meaning for competitive effect and response. This study aims to fill this gap of knowledge. Competitive abilities of Arabidopsis thaliana wildtype and mutants with aberrant root hair phynotypes (root hair deficient, rhd2-1 or excessive root hair density, prc1-1) were examined in a pot-experiment with P-deficient sand. Competitive effects on a phytometer (Hieracium pilosella) or on A. thaliana itself were assessed as well as competitive responses to species mixtures. In intraspecific interaction, the competitive effect of wildtype was superior to that of rhd2-1 or prc1-1. This was much less pronounced in interspecific interaction. Competitive response was entirely uniform between Arabidopsis root phenotypes. The notion that root hairs are important for competition for P should be differentiated. With A. thaliana root hairs less important in inter- than in intraspecific interaction and with root hairs entirely unimportant for competitive response, functional mechanisms of competition for P appear quite complex. Such differential importance of root traits in different facets of competition might well be more common than previously thought.
| Item Type: | Article |
|---|---|
| Uncontrolled Keywords: | HAIRLESS BARLEY MUTANT; PHOSPHORUS ACQUISITION; MYCORRHIZAL FUNGI; ARCHITECTURAL TRADEOFFS; TRICHOME DEVELOPMENT; GENETIC-EVIDENCE; PLANTS; GROWTH; NUTRIENT; WATER; Arabidopsis thaliana; Competitive effect; Competitive response; Interspecific interaction; Root hair deficiency; Species mixture |
| Subjects: | 500 Science > 580 Botanical sciences |
| Divisions: | Biology, Preclinical Medicine > Institut für Pflanzenwissenschaften > Lehrstuhl für Zellbiologie und Pflanzenphysiologie |
| Depositing User: | Dr. Gernot Deinzer |
| Date Deposited: | 30 Mar 2020 11:46 |
| Last Modified: | 30 Mar 2020 11:47 |
| URI: | https://pred.uni-regensburg.de/id/eprint/15971 |
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