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Title: Effects of atmospheric CO/sub 2/ concentration and water stress on water relations of wheat

Abstract

Water status and growth responses of wheat (Triticum aestivuum L. (GWO-1809)) to increased CO/sub 2/ concentration and water stress were studied in controlled-environment chambers. Plants were grown in 350 ..mu..l/liter or 1000 ..mu..1/liter CO/sub 2/ at similar temperature, irradiance, and photoperiod conditions. Groups of plants were subjected to water stress by withholding irrigation for one or two cycles of treatment. In most treatments, decreasing leaf water potential was correlated with decreasing osmotic potential. In leaves grown in both low and high CO/sub 2/ concentrations, the osmotic potentials were lower during the second stress cycle than during the first cycle. The stomata of plants in the low CO/sub 2/ concentration closed at a higher leaf water potential than those in the high CO/sub 2/ concentration. Stem and head production was greater in plants grown in high CO/sub 2/ concentrations than those grown in low CO/sub 2/, perhaps the result of turgor-pressure maintenance as leaf water potential decreased. In controlled-environment chambers, wheat plants adapted to water stress, apparently because of high CO/sub 2/ concentration and repeated stress cycles.

Authors:
; ; ;
Publication Date:
Research Org.:
Duke Univ., Durham, NC
OSTI Identifier:
6119501
Resource Type:
Journal Article
Journal Name:
Bot. Gaz. (Chicago); (United States)
Additional Journal Information:
Journal Volume: 142:2
Country of Publication:
United States
Language:
English
Subject:
63 RADIATION, THERMAL, AND OTHER ENVIRON. POLLUTANT EFFECTS ON LIVING ORGS. AND BIOL. MAT.; BIOLOGICAL STRESS; BIOLOGICAL EFFECTS; CARBON DIOXIDE; WHEAT; PRODUCTIVITY; LEAVES; OSMOSIS; PHOTOSYNTHESIS; PLANT GROWTH; QUANTITY RATIO; SOILS; WATER; CARBON COMPOUNDS; CARBON OXIDES; CEREALS; CHALCOGENIDES; CHEMICAL REACTIONS; DIFFUSION; GRAMINEAE; GRASS; GROWTH; HYDROGEN COMPOUNDS; OXIDES; OXYGEN COMPOUNDS; PHOTOCHEMICAL REACTIONS; PLANTS; SYNTHESIS; 560303* - Chemicals Metabolism & Toxicology- Plants- (-1987)

Citation Formats

Sionit, N, Strain, B R, Hellmers, H, and Kramer, P J. Effects of atmospheric CO/sub 2/ concentration and water stress on water relations of wheat. United States: N. p., 1981. Web. doi:10.1086/337212.
Sionit, N, Strain, B R, Hellmers, H, & Kramer, P J. Effects of atmospheric CO/sub 2/ concentration and water stress on water relations of wheat. United States. https://doi.org/10.1086/337212
Sionit, N, Strain, B R, Hellmers, H, and Kramer, P J. 1981. "Effects of atmospheric CO/sub 2/ concentration and water stress on water relations of wheat". United States. https://doi.org/10.1086/337212.
@article{osti_6119501,
title = {Effects of atmospheric CO/sub 2/ concentration and water stress on water relations of wheat},
author = {Sionit, N and Strain, B R and Hellmers, H and Kramer, P J},
abstractNote = {Water status and growth responses of wheat (Triticum aestivuum L. (GWO-1809)) to increased CO/sub 2/ concentration and water stress were studied in controlled-environment chambers. Plants were grown in 350 ..mu..l/liter or 1000 ..mu..1/liter CO/sub 2/ at similar temperature, irradiance, and photoperiod conditions. Groups of plants were subjected to water stress by withholding irrigation for one or two cycles of treatment. In most treatments, decreasing leaf water potential was correlated with decreasing osmotic potential. In leaves grown in both low and high CO/sub 2/ concentrations, the osmotic potentials were lower during the second stress cycle than during the first cycle. The stomata of plants in the low CO/sub 2/ concentration closed at a higher leaf water potential than those in the high CO/sub 2/ concentration. Stem and head production was greater in plants grown in high CO/sub 2/ concentrations than those grown in low CO/sub 2/, perhaps the result of turgor-pressure maintenance as leaf water potential decreased. In controlled-environment chambers, wheat plants adapted to water stress, apparently because of high CO/sub 2/ concentration and repeated stress cycles.},
doi = {10.1086/337212},
url = {https://www.osti.gov/biblio/6119501}, journal = {Bot. Gaz. (Chicago); (United States)},
number = ,
volume = 142:2,
place = {United States},
year = {Mon Jun 01 00:00:00 EDT 1981},
month = {Mon Jun 01 00:00:00 EDT 1981}
}