Popov Institute of Plant Physiology, Bugarian Academy of Sciences, 1113, Sofia, Bulgaria.
Plant Physiol. 1987 Apr;83(4):820-4. doi: 10.1104/pp.83.4.820.
The influence of abscisic acid (ABA) on carbon metabolism, rate of photorespiration, and the activity of the photorespiratory enzymes ribulose bisphosphate oxygenase and glycolate oxidase in 7-day-old barley seedlings (Hordeum vulgare L. var. Alfa) was investigated. Plants treated with ABA had enhanced incorporation of labeled carbon from (14)CO(2) into glycolic acid, glycine, and serine, while (14)C incorporation into 3-phosphoglyceric acid and sugarphosphate esters was depressed. Parallel with this effect, treated plants showed a rise in activity of RuBP oxygenase and glycolic acid oxidase. The rate of photorespiration was increased twofold by ABA treatment at IO(-6) molar while the CO(2)-compensation point increased 46% and stomatal resistance increased more than twofold over control plants.
脱落酸（ABA）对碳代谢、光呼吸速率以及 7 天龄大麦幼苗（Hordeum vulgare L. var. Alfa）中核酮糖 1,5-二磷酸加氧酶和乙醇酸氧化酶活性的影响。用 ABA 处理的植物增强了标记的来自 (14)CO(2)的碳掺入到乙醇酸、甘氨酸和丝氨酸中，而 (14)C 掺入到 3-磷酸甘油酸和糖磷酸酯中则受到抑制。与这种效应平行的是，处理过的植物中 RuBP 加氧酶和乙醇酸氧化酶的活性增加。ABA 在 10(-6)摩尔时处理使光呼吸速率增加了两倍，而 CO(2)补偿点增加了 46%，气孔阻力比对照植物增加了两倍以上。
