Schmid, Christoph and Bauer, Sibylle and Bartelheimer, Maik (2015) Should I stay or should I go? Roots segregate in response to competition intensity. PLANT AND SOIL, 391 (1-2). pp. 283-291. ISSN 0032-079X, 1573-5036
Full text not available from this repository. (Request a copy)Abstract
Background and Aims Root segregation has been observed in a variety of species. Though it is usually attributed to a plant's attempt to avoid below ground competition, a direct correlation of root distribution with the intensity of competition has never been shown. Methods The test species Hieracium pilosella L. was exposed to a gradient of competitive pressure using the closely related species Arabidopsis petraea (L.) V.I.DOROF., Arabidopsis thaliana (L.) HEYNH., Capsella rubella REUT. and Cardamine hirsuta L. as neighbouring plants. Horizontal root distribution was quantified using a soil monolith method. Results The neighbour species could be ranked according to their competitive effect on the test species, identifying two weak (A. thaliana and A. petraea) and two strong competitors (C. hirsuta and C. rubella). The degree of root segregation correlated negatively with the competitive effect caused by the various neighbour species. Conclusions We conclude that root segregation is indeed a response to competitive pressure. Further factors such as root symbiotic relationships or root exuded allelochemicals are supposedly involved in the outcome of root interactions. We propose the use of screening experiments on root responses to various neighbours in order to quantify each factor's relative influence on rooting patterns.
| Item Type: | Article |
|---|---|
| Uncontrolled Keywords: | SELF/NON-SELF DISCRIMINATION; INTERSPECIFIC COMPETITION; ARABIDOPSIS-THALIANA; PLANT COMPETITION; KIN RECOGNITION; RESOURCE; NUTRIENTS; GRASSES; BIOMASS; COOPERATION; Root segregation; Root distribution; Below ground competition; Hieracium pilosella; Monolith method; Information integration |
| Subjects: | 500 Science > 570 Life sciences |
| Divisions: | Biology, Preclinical Medicine > Institut für Pflanzenwissenschaften |
| Depositing User: | Dr. Gernot Deinzer |
| Date Deposited: | 17 Jul 2019 07:26 |
| Last Modified: | 17 Jul 2019 07:26 |
| URI: | https://pred.uni-regensburg.de/id/eprint/5453 |
Actions (login required)
 |
View Item |
