+ Site Statistics
+ Search Articles
+ PDF Full Text Service
How our service works
Request PDF Full Text
+ Follow Us
Follow on Facebook
Follow on Twitter
Follow on LinkedIn
+ Subscribe to Site Feeds
Most Shared
PDF Full Text
+ Translate
+ Recently Requested

The regulation of photosynthesis in leaves of field grown spring wheat triticum aestivum l. cultivar albis at different levels of ozone in ambient air



The regulation of photosynthesis in leaves of field grown spring wheat triticum aestivum l. cultivar albis at different levels of ozone in ambient air



Plant Physiology 88(4): 1115-1119



Wheat (Triticum aestivum L. cv Albis) was grown in open-top chambers in the field and fumigated daily with charcoal-filtered air (0.015 microliters per liter O3), nonfiltered air (0.03 microliters per liter O3), and air enriched with either 0.07 or 0.10 microliters per liter ozone (seasonal 8 hour/day [9 AM-5 PM] mean ozone concentration from June 1 until July 10, 1987). Photosynthetic 14CO2 uptake was measured in situ. Net photosynthesis, dark respiration, and CO2 compensation concentration at 2 and 21% O2 were measured in the laboratory. Leaf segments were freeze-clamped in situ for the determination of the steady state levels of ribulose 1,5-bisphosphate, 3-phosphoglycerate, triose-phosphate, ATP, ADP, AMP, and activity of ribulose, 1,5-bisphosphate carboxylase/oxygenase. Photosynthesis of flag leaves was highest in filtered air and decreased in response to increasing mean ozone concentration. CO2 compensation concentration and the ratio of dark respiration to net photosynthesis increased with ozone concentration. The decrease in photosynthesis was associated with a decrease in chlorophyll, soluble protein, ribulose bisphosphate carboxylase/oxygenase activity, ribulose bisphosphate, and adenylates. No decrease was found for triose-phosphate and 3-phosphoglycerate. The ratio of ATP to ADP and of triose-phosphate to 3-phosphoglycerate were increased suggesting that photosynthesis was limited by pentose phosphate reductive cycle activity. No limitation occurred due to decreased access of CO2 to photosynthetic cells since the decrease in stomatal conductance with increasing ozone concentration did not account for the decrease in photosynthesis. Ozone-stressed leaves showed an increased degree of activation of ribulose bisphosphate carboxylase/oxygenase and a decreased ratio of ribulose bisphosphate to initial activity of ribulose bisphosphate carboxylase/oxygenase. Nevertheless, it is suggested that photosynthesis in ozone stressed leaves is limited by ribulose bisphosphate carboxylation possibly due to an effect of ozone on the catalysis by ribulose bisphosphate carboxylase/oxygenase.

Please choose payment method:






(PDF emailed within 1 workday: $29.90)

Accession: 007927885

Download citation: RISBibTeXText


Related references

The Regulation of Photosynthesis in Leaves of Field-Grown Spring Wheat (Triticum aestivum L., cv Albis) at Different Levels of Ozone in Ambient Air. Plant Physiology 88(4): 1115-1119, 1988

Effects of ozone on the yield of spring wheat triticum aestivum l. cultivar albis grown in open top field chambers. Environmental Pollution 60(3-4): 273-290, 1989

Effects of ozone on the yield of spring wheat (Triticum aestivum L., cv. Albis) grown in open-top field chambers. Environmental Pollution 60(3-4): 273-289, 1989

Regulation of rna synthesis by dna dependent rna polymerases and rnase during cold acclimation in winter triticum aestivum cultivar talbot and spring wheat triticum aestivum cultivar glenlea. Plant Physiology 78(2): 250-255, 1985

Nitrogen nutrition and canopy temperature in field grown spring wheat triticum aestivum cultivar anza. Journal of Agricultural Science 101(3): 691-698, 1983

Growth and leaf senescence in spring wheat triticum aestivum grown at different ozone concentrations in open top field chambers. Physiologia Plantarum 77(3): 389-394, 1989

Assessing the impact of ambient ozone on growth and yield of a rice (Oryza sativa L.) and a wheat (Triticum aestivum L.) cultivar grown in the Yangtze Delta, China, using three rates of application of ethylenediurea (EDU). Environmental Pollution 148(2): 390-395, 2007

Effects of cycocel ccc and fungicide sprays on spring wheat triticum aestivum cultivar opal grown at 3 nitrogen levels. Canadian Journal of Plant Science 59(4): 917-930, 1979

Effects of sulfur dioxide and ambient ozone on winter wheat triticum aestivum cultivar yecora rojo and lettuce lactuca sativa cultivar empire. Journal of Environmental Quality 15(4): 363-369, 1986

Gaseous exchange in excised Triticum aestivum L. cv. Kolibri leaves of field-grown plants during the life cycle Wheat, Mediterranean climate conditions, photosynthesis. Photosynthesis and plant productivity: joint Meeting of OECD and Studienzentrum Weikersheim Ettlingen Castle Germany October 11-14-1981 editor: H Metzner: 2, 1983

Responses of spring wheat (Triticum aestivum L.) to ozone produced by either electric discharge and dry air or by UV-lamps and ambient air. Environmental Pollution 93(2): 121-127, 1996

Chloroplast dna levels and the control of chloroplast division in light grown wheat triticum aestivum cultivar maris dove leaves. Plant Physiology 69(6): 1387-1391, 1982

Inhibition of photosynthesis by carbohydrates in wheat triticum aestivum cultivar gabo leaves. Plant Physiology 73(3): 681-686, 1983

The responsiveness to temperature of the extension rates of leaves of wheat triticum aestivum cultivar gamenya growing in the field under different levels of nitrogen fertilizer. Journal of Experimental Botany 33(132): 29-36, 1982

Biochemical changes that occur during senescence of wheat triticum aestivum cultivar roy leaves 1. basis for the reduction of photosynthesis. Plant Physiology (Rockville) 70(6): 1641-1646, 1982