|Appears in Collections:||Biological and Environmental Sciences Journal Articles|
|Peer Review Status:||Refereed|
|Title:||Atmospheric pollution and the sensitivity of stomata on barley leaves to abscisic acid and carbon dioxide|
|Authors:||Atkinson, Christopher J|
Mansfield, Terry A
Hordeum vulgare (barley)
|Citation:||Atkinson CJ, Wookey P & Mansfield TA (1991) Atmospheric pollution and the sensitivity of stomata on barley leaves to abscisic acid and carbon dioxide, New Phytologist, 117 (4), pp. 535-541.|
|Abstract:||Spring barley (Hordeum vulgare L. cv. Klaxon) plants were exposed to mixtures of SO2+ NO2 (at concentrations of 24–35 nl l−1of each gas, depending upon fumigation system), or to charcoal‐filtered, or unfiltered ambient air during the period in which the second, and subsequent, leaves were emerging. The ability of individual detached leaves to regulate water loss was then examined after terminating the pollutant treatment. Observations of diurnal changes in stomatal resistance of well‐watered plants, using a viscous flow porometer, failed to indicate any major alterations which could be attributed to prior exposure to SO2+ NO2. By contrast, when an ABA solution (10−1mol m−3) was applied to detached leaves, the stomata of polluted plants were less responsive than plants previously exposed to control air. The dynamics of the observed responses strongly implicated impaired physiology of the guard cells rather than mechanical changes in the epidermis that might, for example, result from damage to the cuticle. Stomatal closure was considerably slower in polluted leaves compared with the controls. This decline in responsiveness to ABA was observed using leaves excised from well‐watered plants and in the absence of any externally visible injury. The ability of stomata to respond to a range of CO2 concentrations from 195–735 μmol mol−1was also examined using individual leaves, attached to the plant, in an environmentally controlled cuvette. Here the stomata of leaves which had been fumigated with SO2+ NO2 behaved in a similar manner to the non‐fumigated leaves, both showing closure in elevated CO2 concentrations. Copyright © 1991, Wiley Blackwell. All rights reserved|
|Rights:||The publisher does not allow this work to be made publicly available in this Repository. Please use the Request a Copy feature at the foot of the Repository record to request a copy directly from the author. You can only request a copy if you wish to use this work for your own research or private study.|
|ATKINSON_et_al-1991-New_Phytologist.pdf||6.78 MB||Adobe PDF||Under Embargo until 31/12/2999 Request a copy|
Note: If any of the files in this item are currently embargoed, you can request a copy directly from the author by clicking the padlock icon above. However, this facility is dependent on the depositor still being contactable at their original email address.
This item is protected by original copyright
Items in the Repository are protected by copyright, with all rights reserved, unless otherwise indicated.
If you believe that any material held in STORRE infringes copyright, please contact email@example.com providing details and we will remove the Work from public display in STORRE and investigate your claim.