As a kind of ephemeral plant, Lepidium apetalum Willd. in northern XinJiang shows special responsible characteristics to temperature during the germination: low temperature stratification could improve germination rate and homogeneity of L.apetalum seeds. But it could not germinate and be at stagnation stage under 4°C, while this phenomenon could be removed by the treatment with 25°C for 45 min...

There is increasing interest in the health and wellness benefits of herbs and botanicals. This is with good reason as they might offer a natural safeguard against the development of certain conditions and be a putative treatment for some diseases. One such area may be the lowering of blood pressure in those where it is elevated (i.e., hypertension). One class of clinical medicines used to lower...

We analyze how temporal variability in local demography and dispersal combine to affect the rate of spread of an invading species. Our model combines state-structured local demography (specified by an integral or matrix projection model) with general dispersal distributions that may depend on the state of the individual or its parent. It allows very general patterns of stationary temporal varia...

Sexual selection favors strategies that enhance the fertilization chances of sperm donors, and sexual conflict can ensue when these adaptations negatively affect sperm recipients (Arnqvist and Rowe 2005). Such conflict often causes counteradaptive coevolution that can result in bizarre mating behaviors in separate-sex (Arnqvist and Rowe 2005) and hermaphroditic species (Michiels and Newman 1998...

abstract there is a world-wide effort to reduce the amount of chemicals used in crop production by introducing modern biological and ecological methods. one possible alternative is allelopathy. a laboratory trial was carried out to investigate of alleopathic potential of angelica . in this study the effect of different concentrations of aqueous extract of angelica herb was investigated on seed ...

Cardaria draba is an important, troublesome weed in the sustainable production of wheat. Inthe first step of this study, 100 actinomycete isolates were purified from soil samples collectedfrom the rhizosphere and phyllosphere of plants in different provinces of Iran. All isolates weresubjected to primary screening by assaying the fermentation broth of the sterile surfaces of C.draba leaves. Con...