Stomatal Functioning ofIn Vitroand Greenhouse Apple Leaves in Darkness, Mannitol, ABA, and CO2
- 1 June 1982
- journal article
- research article
- Published by Oxford University Press (OUP) in Journal of Experimental Botany
- Vol. 33 (3), 388-392
- https://doi.org/10.1093/jxb/33.3.388
Abstract
Leaves from in vitro and greenhouse cultured plants of Malus domestica (Borkh.) cv. Mark were subjected to 4 h of darkness; 4 h of 1 M mannitol induced water stress; 1 h of 10−4 M to 10−7 M cis-trans abscisic acid (ABA) treatment; 1 h of 0.12% atmospheric CO2. Stomatal closure was determined by microscopic examination of leaf imprints. In all treatments, less than 5% of the stomata from leaves of in vitro cultured plants were closed. The diameter of open stomata on leaves from in vitro culture remained at 8 μm. In contrast, an average of 96% of the stomata on leaves of greenhouse grown plants were closed after 4 h in darkness; 56% after 4 h of mannitol induced water stress; 90% after 1 h of 10−4 M ABA treatment; 61% after 1 h in an atmosphere of 0.12% CO2. Stomata of in vitro apple leaves did not seem to have a closure mechanism, but acquired one during acclimatization to the greenhouse environment. The lack of stomatal closure in in vitro plants was the main cause of rapid water loss during transfer to low relative humidity.This publication has 2 references indexed in Scilit:
- Stomatal Responses to Applied ABA and CO2in Epidermis Detached from Well-Watered and Water-Stressed Plants ofCommelina communisL.Journal of Experimental Botany, 1981
- The Influence of Water Strain on the Minimum Intercellular Space Carbon dioxide Concentration λ and Stomatal Movement in Wheat LeavesJournal of Experimental Botany, 1961