The CO(2) response of Vicia guard cells acclimates to growth environment

• Published in: Journal of experimental botany Vol. 53; no. 368; pp. 545 - 550
• Main Authors: Frechilla, Silvia, Talbott, Lawrence D, Zeiger, Eduardo
• Format: Journal Article
• Language: English
• Published: England 01.03.2002
• Subjects: Acclimatization - drug effects; Acclimatization - physiology; Carbon Dioxide - pharmacology; Environment, Controlled; Fabaceae - drug effects; Fabaceae - physiology; In Vitro Techniques; Plant Epidermis - cytology; Plant Epidermis - drug effects; Plant Epidermis - physiology; Plant Leaves - cytology; Plant Leaves - drug effects; Plant Leaves - physiology; Time Factors
• ISSN: 0022-0957

Stomata of growth chamber-grown Vicia faba leaves have an enhanced CO(2) response, measured as change in stomatal aperture, compared to stomata of greenhouse-grown leaves. Reciprocal transfer experiments showed that the stomatal response to CO(2) acclimated to the growing environment. Stomata of growth chamber-grown leaves transferred to a greenhouse lost their high CO(2) sensitivity within 2-3 d while stomata of greenhouse-grown leaves transferred to a growth chamber acquired a high CO(2) sensitivity within 5-7 d. Experiments measuring the CO(2) responses of stomata in detached epidermis showed that growth chamber and greenhouse-grown stomata have the same contrasting CO(2) sensitivity observed in the intact leaf, indicating that the responses reflect intrinsic guard cell properties. The acclimation properties of the CO(2) response of guard cells have implications for the understanding of stomatal function under the predicted increases in atmospheric CO(2).