background: cornus sanguinea l subsp australis (c.a. mey.) jáv. (cornaceae) is a native species in north and northwest of iran. it is locally named siah-al. the genus cornus is rich source of anthocyanins. objective: in this study the antioxidant activity, total phenol and total anthocyanin contents of different extracts of c. sanguinea l subsp australis. were investigated for the first time. m...

In this paper we make comparisons between the observed stable isotopic composition of leaf water and the predictions of the Craig-Gordon model of isotopic enrichment when plants (Cornus stolonifera L.) were exposed to natural, diurnal changes in temperature and humidity in a glasshouse. In addition, we determined the effects of mild water stress on the isotopic composition of leaf water. The mo...

Shrub encroachment of grasslands is a transformative ecological process by which native woody species increase in cover and frequency and replace the herbaceous community. Mechanisms of encroachment are typically assessed using temporal data or experimental manipulations, with few large spatial assessments of shrub physiology. In a mesic grassland in North America, we measured inter- and intra-...

The expansion of C(3) shrubs into C(4)-dominated tallgrass prairies represents a fundamental shift in growth-form dominance accompanied by changes in resource acquisition and use. We assessed these changes by comparing the ecophysiological traits of the dominant C(4) grass Andropogon gerardii, with traits of three C(3) invasive shrub species, Cornus drummondii, Prunus americana, and Rhus glabra...

A warm (20 to 15 Celsius day or night) preconditioning treatment enhanced cold acclimation of Cornus stolonifera bark under short-day conditions when plants were preconditioned for at least 4 weeks. Warm preconditioning inhibited the acclimation of plants subjected to long photoperiods. Removing leaves from plants exposed to low temperatures and short days inhibited acclimation. Removal of buds...

The process of ultrasonic-enhanced compound-enzymes-assisted extraction of polysaccharides from the fruit of Cornus officinalis was optimized by response surface methodology (RSM). The influence of three different factors on the yield of C. officinalis polysaccharides (COP) was studied. The results showed that the optimal conditions were extraction temperature 49.6 °C, ultrasound time 40.41 min...