Glycidate (2,3-epoxypropionate) increased CO(2) photoassimilation in intact spinach (Spinacia oleracea L.) chloroplasts in the presence of various inhibitors of photosynthesis, including O(2), arsenite, azide, iodo-acetamide, and carbonylcyanide 3-chlorophenylhydrazone. Although the mechanism by which glycidate enhances photosynthesis is obscure, the stimulatory effect cannot be ascribed to eit...

At 14-hour day length, 25 C leaf temperature, 9 mm Hg vapor-pressure deficit, and 1.17 joules cm(-2) min(-1) irradiance, the diurnal change in daily photosynthesis of the cultivated peanut (Arachis hypogaea L.) is a result of an endogenously controlled circadian rhythm in net photosynthesis which peaks near noon and troughs near midnight. By resetting the day-night light regime, the rhythm reph...

Chlorophyll-a is an indicator of the abundance phytoplankton in waters which plays a role process photosynthesis. Phytoplankton crucial determining primary productivity waters. Organic carbon production during photosynthesis defined as direct or net (Net Primary Productivity). Ternate Island are part province North Maluku and one that play vital contributing to capture fisheries, especially pel...

since 1895 cardamom has been cultivated in the cardamom hills of western ghats, india, which form a part of global biodiversity hot spots. these tropical forests in the last couple of decades have been subjected for severe periodical shade lopping and selective felling for maximizing cardamom production. photosynthesis, transpiration, leaf temperature and leaf relative humidity was studied in r...

holy basil (ocimum sanctum) is one of the important medicinal plant belongs to lamiaceae family. in order to evaluate the effect of foliar application of iron on iron and chlorophyll contents and photosynthetic parameters of holy basil, an experiment was conducted at research farm of department of horticultural science, shahid chamran university of ahvaz based on randomized complete block desig...

The effects of elevated O 3 (O ) on photosynthetic characteristics urban trees were studied in an open-top air chamber. results showed that net rate ( P n), transpiration E t), stomatal conductance G s) and water use efficiency (WUE) different tree species decreased significantly with the increase concentration, while intercellular CO 2 (C i concentration increased concentration. Under concentr...

abstract a greenhouse experiment was conducted to study the effects of soil copper (cu) and salinity application on photosynthesis parameters, enzyme activity and anatomical structure of two pistachio cultivars. a factorial greenhouse experiment was carried out as completely randomized design with three replications. treatments consisted of four cu levels (0, 2.5, 5, and 7.5 mg kg-1soil as cuso...

namomum camphora Sieb. was followed over a growing season from July to December 1992. Dark respiration was exponentially related to temperature, with a Q10 value near 2. Light dependence of photosynthetic CO2 refixation, i.e., the ratio of gross photosynthesis to dark respiration, was approximated by a hyperbolic function. Seasonal variation in maximum CO2 refixation capacity ranged between 52 ...

Many studies examine how body size mediates energy use, but few investigate how size simultaneously regulates energy acquisition. Furthermore, rarely energy fluxes are examined while accounting for the role of biotic and abiotic factors in which they are nested. These limitations contribute to an incomplete understanding of how size affects the transfer of energy through individuals, population...

Rhamnus cathartica is an invasive shrub capable of high fecundity in North America. The physiology of R. cathartica has received little attention, but more is needed to understand traits that enhance its success in disturbed environments. Such data may help to predict invasiveness of closely related species such as Frangula caroliniana. We hypothesized that R. catharticawould have greater relat...