0 Species!pairs from woody dicot lineages were chosen as phylogenetically inde! pendent contrasts "PICs# to represent evolutionary divergences along gradients of rainfall and nutrient stress\ and within particular habitat types\ in New South Wales\ Australia[ Seedlings were grown under controlled\ favourable conditions and measurements were made for various growth\ morphological and allocation ...

UNLABELLED PREMISE OF THE STUDY A functional approach to investigating competitive interactions can provide a mechanistic understanding of processes driving population dynamics, community assembly, and the maintenance of biodiversity. In Sonoran Desert annual plants, a trade-off between relative growth rate (RGR) and water-use efficiency (WUE) contributes to species differences in population...

Coffee is one of the most socioeconomically important crops worldwide. Currently, environmental variations due to climate change are affecting coffee development and growth. Therefore, it evaluate areas that offer a different environment during seedling stage since fundamental for successful cultivation. Four municipalities located at altitudes in Department Nariño were selected: La Florida (18...

the cowpea seed beetle, callosobruchus maculatus (fab.) (coleoptera: chrysomelidae: bruchinae) is one of the major pests infesting stored pulses and is distributed worldwide. in this research, efficiency of plant extracts from eucalyptus globulus labill. and eucalyptus camaldulensis dehnh. were tested against the cowpea seed beetle for its antifeedant activity. several experiments were designed...

Effects of water supply on gas exchange, carbon isotopic composition, and relative growth rate were compared among seedlings from three populations of ponderosa pine (Pinus ponderosa Dougl. ex Laws.) grown in a controlled environment chamber. The three populations were chosen to represent high, moderate and low drought tolerance. There was no indication that drought tolerance was related to hig...

The rate of herbicide resistance evolution in plants depends on fitness traits endowed by alleles in both the presence and absence (resistance cost) of herbicide selection. The effect of two Lolium rigidum spontaneous homozygous target-site resistance-endowing mutations (Ile-1781-Leu, Asp-2078-Gly) on both ACCase activity and various plant growth traits have been investigated here. Relative gro...

We aimed to identify functional differences between different sections of the thallus Ulva australis and develop tissue-endpoint combinations assess toxicity six metals (i.e., Ag, As, Cd, Cr, Cu, Ni). EC50 values for these in three were obtained multiple endpoints: relative growth rate (RGR), chlorophyll a fluorescence, pigment contents, expression photosynthesis-related gene, rbcL. The respons...

In tropical forests, trees compete not only with other trees, but also with lianas, which may limit tree growth and regeneration. Liana effects may depend on the availability of aboveand below-ground resources and differ between tree species. We conducted a shade house experiment to test the effect of light (4% and 35% full sun, using neutral-density screen) on the competitive interactions betw...

The changing environmental factors exerted great influences on coastal macroalgal communities. To study the responses of brown seaweed Sargassum horneri to temperature and light, S. was cultured under three temperatures (20, 25 30°C) light intensities (30, 60, 120 µmol photonsm−2 s−1) for seven days. growth rate, chlorophyll a (Chl a) carotenoids (Car) contents, fluorescence, photosynthetic oxy...

Relative growth rate (RGR), leaf water potential (psi w), transpiration rate (Tr), photosynthetic rate (Pn), and stomatal and mesophyll resistances to CO2 exchange were measured or calculated to determine how periodic seismic (shaking) stress decreased dry weight accumulation by soybean (Glycine max [L.] Merrill cv Wells II). Seismic stress was applied with a gyratory shaker at 240 to 280 revo...