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Crop responses to ozone: uptake, modes of action, carbon assimilation and partitioning
Assessment of O 3 impacts on crop physiology continue to support the rationale for maintaining or improving current O 3 air quality standards as well as providing a basis for development of more O 3 -tolerant crop lines. Expand
Arbuscular Mycorrhizal Fungi Increase Organic Carbon Decomposition Under Elevated CO2
Evidence is presented from four independent microcosm and field experiments demonstrating that CO2 enhancement of AMF results in considerable soil carbon losses, challenging the assumption that AMF protect against degradation of organic carbon in soil and raising questions about the current prediction of terrestrial ecosystem carbon balance under future climate-change scenarios. Expand
The ozone component of global change: potential effects on agricultural and horticultural plant yield, product quality and interactions with invasive species.
- F. Booker, R. Muntifering, +7 authors D. Grantz
- Journal of integrative plant biology
- 1 April 2009
It is concluded that current and projected levels of O3 in many regions worldwide are toxic to sensitive plants of agricultural and horticultural significance, while reductions in O3 precursor emissions will likely benefit world food production and reduce atmospheric concentrations of an important greenhouse gas. Expand
Functional role of anthocyanins in high-light winter leaves of the evergreen herb Galax urceolata.
Results suggest that anthocyanins function as light attenuators and may also contribute to the antioxidant pool in winter leaves and may be necessary for their photo-induction. Expand
Photosynthesis, chlorophyll fluorescence, and yield of snap bean (Phaseolus vulgaris L.) genotypes differing in sensitivity to ozone
This work was undertaken as the first comparative study of the effects of O3 on the photosynthetic processes and yield of three snap bean genotypes with known differences in sensitivity to O3, to identify physiological subsystems that may mediate those differences. Expand
Ambient Ozone and Plant Health.
Seasonal profiles of leaf ascorbic acid content and redox state in ozone-sensitive wildflowers.
- K. Burkey, H. Neufeld, Lara Souza, A. Chappelka, A. Davison
- Biology, Medicine
- Environmental pollution
- 1 October 2006
Different differences in antioxidant metabolism were found in the wildflower species that corresponded with differences in ozone sensitivity, and identified antioxidant compounds were present in the leaf apoplast of all three species. Expand
Factors that affect leaf extracellular ascorbic acid content and redox status
Leaf ascorbic acid content and redox status were compared in ozone-tolerant (Provider) and ozone-sensitive (S156) genotypes of snap bean (Phaseolus vulgaris L.). Plants were grown in pots for 24 days… Expand
Re-evaluating the role of ascorbic acid and phenolic glycosides in ozone scavenging in the leaf apoplast of Arabidopsis thaliana L.
Current understanding of O(3) defence schemes deserves reassessment as mechanisms other than direct scavenging of O (3) by extracellular AA and antioxidant activity of some phenolics may predominate in some plant species. Expand
Effect of growth irradiance on plastocyanin levels in barley
- K. Burkey
- Biology, Medicine
- Photosynthesis Research
- 1 May 1993
Plastocyanin levels were not affected in plants transferred from high to low irradiance, suggesting that plastOCyanin is not involved in the acclimation of photosynthesis to shade. Expand