Filters: Tags: photosynthesis (X)
520 results (135ms)
Filters
Date Range
Extensions Types Contacts
Categories Tag Types
|
The mechanisms controlling the photosynthetic performance of C4 plants at low temperature were investigated using ecotypes of Bouteloua gracilis Lag. from high (3000 m) and low (1500 m) elevation sites in the Rocky Mountains of Colorado. Plants were grown in controlled-environment cabinets at a photon flux density of 700 μmol m−2 s−1 and day/night temperatures of 26/16 °C or 14/7 °C. The thermal response of the net CO2 assimilation rate (A) was evaluated using leaf gas-exchange analysis and activity assays of ribulose-1,5-bisphosphate carboxylase/oxygenase (Rubisco), phosphoenolpyruvate carboxylase (PEPCase) and pyruvate,orthophosphate dikinase (PPDK). In both ecotypes, a reduction in measurement temperature...
Categories: Publication;
Types: Citation,
Journal Citation;
Tags: Bouteloua,
C4 photosynthesis,
Plant, Cell & Environment,
Rubisco activity,
gas exchange,
Arid and semi-arid ecosystems of the southwestern US are undergoing changes in vegetation composition and are predicted to experience shifts in climate. To understand implications of these current and predicted changes, we conducted a precipitation manipulation experiment on the Santa Rita Experimental Range in southeastern Arizona. The objectives of our study were to determine how soil surface and seasonal timing of rainfall events mediate the dynamics of leaf-level photosynthesis and plant water status of a native and non-native grass species in response to precipitation pulse events. We followed a simulated precipitation event (pulse) that occurred prior to the onset of the North American monsoon (in June) and...
Categories: Publication;
Types: Citation,
Journal Citation;
Tags: Oecologia,
Santa Rita Experimental Range,
Springer Berlin / Heidelberg,
invasive grass species,
photosynthesis,
Gas exchange and water relations responses to warming were compared for two shrub species, Artemisia tridentata spp. vaseyana (Asteraceae), a widely distributed evergreen species of the Great Basin and the western slope of the Rocky Mountains, and Pentaphylloides floribunda (Rosaceae), a deciduous shrub limited in distribution to moist, high-elevation meadows. Plants were exposed to an in situ infrared (IR) climate change manipulation at the Rocky Mountain Biological Laboratory, near Crested Butte, CO. Measurements of gas exchange and water relations were made on the two species in July and August, 1993 from plants growing in situ in infrared-heated and control plots. Carbon dioxide uptake, water loss, leaf temperature,...
Categories: Publication;
Types: Citation,
Journal Citation;
Tags: Artemisia,
Climate change,
Pentaphylloides,
Photosynthesis,
Plant Ecology,
Categories: Publication;
Types: Citation;
Tags: D 04640 Other angiosperms,
Ecology Abstracts,
Larrea tridentata,
USA, New Mexico, Chihuahuan Desert,
leaf characters,
Categories: Publication;
Types: Citation;
Tags: D 04640 Other angiosperms,
Ecology Abstracts,
USA, New Hampshire, Hubbard Brook Experimental Forest,
autumn,
conductance,
Categories: Publication;
Types: Citation;
Tags: D 04635 Conifers,
Ecology Abstracts,
Pinus eldarica,
USA, Arizona,
atmospheric conditions,
Categories: Publication;
Types: Citation;
Tags: Acer,
D 04125 Temperate forests; D 04003 Modeling, mathematics, co,
Ecology Abstracts,
Quercus,
USA, Tennessee,
Categories: Publication;
Types: Citation;
Tags: Agricultural and Environmental Biotechnology Abstracts,
Anabaena cylindrica,
W2 32000 General topics and reviews,
fossil fuels,
hydrogen,
Categories: Publication;
Types: Citation;
Tags: Helianthus annuus,
Toxicology Abstracts,
U.V. radiation,
X 24210 Radiation & radioactive materials,
Zea mays,
Categories: Publication;
Types: Citation;
Tags: Africa, Sahelian Zone,
HAPEX-Sahel,
SW 0810 General,
Water Resources Abstracts,
biosphere,
Categories: Publication;
Types: Citation;
Tags: ASFA 1: Biological Sciences & Living Resources; Oceanic Abst,
Amphibolis,
Amphibolis,
Australia, Western Australia,
Gas exchange,
Categories: Publication;
Types: Citation;
Tags: Acer rubrum,
Black cherry,
Forests,
Northern red oak,
Ozone,
Categories: Publication;
Types: Citation;
Tags: ANE, Baltic Sea,
ASFA 1: Biological Sciences & Living Resources; Oceanic Abst,
Algae,
Algal blooms,
Aphanizomenon flos-aquae,
Categories: Publication;
Types: Citation;
Tags: Arisaema heterophyllum,
D 04640 Other angiosperms,
Ecology Abstracts,
conservation,
growth,
Categories: Publication;
Types: Citation;
Tags: Bioindicators,
Chlorophyll,
Chlorophylls,
Crude oil,
Dispersants,
|