Department of Agronomy and Range Science, University of California, Davis, California 95616.
Plant Physiol. 1976 Jan;57(1):59-62. doi: 10.1104/pp.57.1.59.
The influence of protein synthesis and nitrate reductase activity on nitrate absorption by barley (Hordeum vulgare L.) was investigated. Cycloheximide decreased nitrate absorption. Pretreatment studies showed that cycloheximide affects either energy transfer or nitrate reductase activity or both.Illumination increased plant capacity for nitrate absorption, possibly through increased energy supply and/or increased nitrate reductase activity. There was a positive correlation between nitrate reductase activity and light. Inhibiting the development of nitrate reductase activity by tungstate decreased nitrate absorption.AT LEAST TWO NITRATE TRANSPORT SYSTEMS ARE THUS PROPOSED IN BARLEY: one operating in the dark, with little nitrate reductase activity detectable; and one closely correlated with nitrate reductase activity. Total absorption is the sum of dark absorption and absorption facilitated by nitrate reductase.
研究了蛋白质合成和硝酸还原酶活性对大麦（Hordeum vulgare L.）吸收硝酸盐的影响。环己酰亚胺降低了硝酸盐的吸收。预处理研究表明，环己酰亚胺要么影响能量转移，要么影响硝酸还原酶活性，要么两者都有影响。光照增加了植物吸收硝酸盐的能力，可能是通过增加能量供应和/或增加硝酸还原酶活性。硝酸还原酶活性与光之间呈正相关。钨酸盐抑制硝酸还原酶活性的发展，降低了硝酸盐的吸收。因此，在大麦中提出了至少两种硝酸盐转运系统：一种在黑暗中运行，检测不到多少硝酸还原酶活性；另一种与硝酸还原酶活性密切相关。总吸收是黑暗吸收和由硝酸还原酶促进的吸收的总和。
