this study was conducted in order to sustainable conservation and utilization of trifolium genetic resources. a total of 1333 accessions of trifolium under 32 species from 27 provinces were collected according to ipgri descriptors. collected germplasms are conserved in mid- and long-term conservation at national plant gene bank of iran. statistical parameters of tendency to center and dispersio...

In perennial grasslands R. obtusifolius (broad-leaved dock) is often surrounded by certain plant species. Thus, it is hypothesized for the current study that Rumex can affect their neighbouring plant species by allelopathic interactions. To test this hypothesis, in a series of laboratory and field experiments aqueous extracts of green R. obtusifolius leaves were sprayed on seeds of 14 herbaceou...

In a feeding trial with 24 sheep, we used the alkanes, long-chain alcohols (LCOH) or both of these plant wax markers, to estimate the diet composition of animals offered diets comprising alkane-labelled cottonseed meal (CSM) together with up to four forages. The diets used were: Diet 1 subterranean clover (Trifolium subterraneum); Diet 2 subterranean clover + phalaris (Phalaris aquatica); Diet ...

BACKGROUND AND AIMS One of the special properties of clonal plants is the capacity for physiological integration, which can increase plant performance through mechanisms such as resource sharing and co-ordinated phenotypic plasticity when plants grow in microsites with contrasting resource availabilities. However, many clonal plants are colonized by arbuscular mycorrhizal fungi (AMF). Since AMF...

The effects of CO2 and tropospheric O3 on forest trees are increasingly the subject of experimental evaluation. Little is known, however, about he effects of these gases on understory plant taxa. At the Aspen free-air CO2 and O3 enrichment (Aspen FACE) site we assessed colonization and stablishment of two common forest understory species, red (Trifolium pratense) and white (Trifolium repens) cl...

BACKGROUND Herbaceous plants are common vegetal species generally exposed, for a limited period of time, to bioavailable environmental pollutants. Heavy metals contamination is the most common form of environmental pollution. Herbaceous plants have never been used as natural bioindicators of environmental pollution, in particular to monitor the amount of heavy metals in soil. In this study, we ...

Soil food webs comprise a multitude of trophic interactions that can affect the composition and productivity of plant communities. Belowground predators feeding on microbial grazers like Collembola could decelerate nutrient mineralization by reducing microbial turnover in the soil, which in turn could negatively influence plant growth. However, empirical evidences for the ecological significanc...