[Prospective research on the duality between morphological traits and plant competitive capacity: the case of weed species and wheat].
Competitive abilities of plants were interpreted by measuring their morphological traits in interspecific competitive cultivation conditions. Measurements were realised by a comparative approach with interspecific cultivation of fourteen arable weeds growing with a domestic species cultivated at a large scale: the winter wheat (Triticum aestivum var Darius). Results show that arable weeds characterised by an important biomass and allocation of biomass to the stems are responsible for a decrease in wheat biomass, and for the ear, a decrease in height, biomass and number of seeds. These results are discussed in view of predicting competitive abilities of arable weeds with a simple method and for the conservation of arable weeds since some of them are among the most threatened species of the European flora.
Dutoit
T
T
UMR/CNRS 6116, Imep, case 421bis, faculté des sciences et techniques Saint-Jérôme, université de Provence, 13397 Marseille, France. thierry.dutoit@bioeco.u-3mrs.fr
Gerbaud
E
E
Ourcival
J M
JM
Roux
M
M
Alard
D
D
D018533:Biomass; D017753:Ecosystem; D005060:Europe; D019684:Magnoliopsida / Q000502:physiology*; D018547:Plant Stems / Q000502:physiology; D012639:Seeds / Q000502:physiology; D014908:Triticum / Q000502:physiology*