The effect of temperature on the sensitivity of nitrogenase to oxygen in the cyanobacteria Anabaena cylindrica (Lemmermann) and Gloeothece (Nägeli).
The effect of temperature on the sensitivity of nitrogenase to oxygen in the cyanobacteria Anabaena cylindrica (Lemmermann) and Gloeothece (Nägeli).
复制标题
温度对蓝藻 Anabaena cylindrica (Lemmermann) 和 Gloeothece (Nägeli) 固氮酶对氧敏感性的影响。
DOI：
10.1111/j.1469-8137.1993.tb03814.x
复制
发表时间：
1993
期刊：
影响因子：
--
通讯作者：
Geoffrey D. Smith
中科院分区：
文献类型：
--
作者：
J. Gallon;D. M. Pederson;Geoffrey D. Smith
短暂暴露于高温（37-40 °C）抑制了异囊蓝藻Anabaena cylindrica（Lemmermann）ATCC 27899和单细胞非异囊蓝藻Gloeothece sp.（Nägeli）ATCC 27152培养物中的N2固定（乙炔还原）。在这两种生物体中，固氮酶的热失活抑制了固氮。相反，在高温下N2固定的失活是对O2 In A抑制的敏感性增加的结果。cylindrica的热诱导失活固氮O2可能与抑制的摄取氢酶。然而，在Gloeothece，抑制碳支持的呼吸O2消耗升高的温度是可能的原因增加的敏感性N2固定O2。
Transient exposure to elevated temperature (37-40 °C) inhibited N2 fixation (acetylene reduction) in cultures of the heterocystous cyanobacterium Anabaena cylindrica (Lemmermann) ATCC 27899 and the unicellular, non-heterocystous cyanobacterium Gloeothece sp. (Nägeli) ATCC 27152. In neither organism was inhibition of N2 fixation due to thermal inactivation of nitrogenase. Rather, inactivation of N2 fixation at elevated temperature was a consequence of increased sensitivity to inhibition by O2 In A. cylindrica, thermally induced inactivation of N2 fixation by O2 could be correlated with inhibition of uptake hydrogenase. However, in Gloeothece, inhibition of carbon-supported respiratory O2 consumption by elevated temperature was the probable cause of the increased sensitivity of N2 fixation to O2 .