核酮糖二磷酸羧化酶：高羊茅中改变的遗传表达。
Ribulose bisphosphate carboxylase: altered genetic expression in tall fescue.
机构信息
Departments of Biochemistry and Agronomy, University of Missouri, Columbia, Missouri 65201.
出版信息
Plant Physiol. 1977 Jan;59(1):38-41. doi: 10.1104/pp.59.1.38.
Abstract
A decaploid tall fescue (Festuca arundinacea Schreb) genotype has been found which exhibits net photosynthetic rates of 32 to 41 mg CO(2)/dm(2).hour as opposed to a mean of 22 mg CO(2)/dm(2).hour for 10 hexaploid genotypes. The decaploid genotype exhibited a ribulose 1,5-bisphosphate (RuBP) carboxylase specific activity 1.3- to 2-fold higher than typical tall fescue genotypes. Specific activities of photorespiratory enzymes and nitrate reduction enzymes were lower in the decaploid than the hexaploid genotypes. Results suggest that genetic expression of RuBP carboxylase activity may have been altered to increase the net photosynthesis rate in the decaploid genotype.
摘要
发现了一种具有 32 到 41mg CO(2)/dm(2).hour 的净光合速率的十倍体高羊茅（Festuca arundinacea Schreb）基因型，而十个六倍体基因型的平均净光合速率为 22mg CO(2)/dm(2).hour。十倍体基因型的核酮糖 1,5-二磷酸（RuBP）羧化酶比典型的高羊茅基因型高 1.3 到 2 倍。十倍体基因型的光呼吸酶和硝酸盐还原酶的比活性低于六倍体基因型。结果表明，RuBP 羧化酶活性的遗传表达可能发生了改变，从而提高了十倍体基因型的净光合速率。
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