STUDIES ON ENHANCED POST-ILLUMINATION RESPIRATION IN MICROALGAE
STUDIES ON ENHANCED POST-ILLUMINATION RESPIRATION IN MICROALGAE
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DOI：
10.1093/plankt/16.10.1401
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发表时间：
1994-10-01
影响因子：
2.1
通讯作者：
FONTVIELLE, D
中科院分区：
文献类型：
--
作者：
BEARDALL, J;BURGERWIERSMA, T;FONTVIELLE, D
已经在一些微藻中研究了增强的光照后呼吸（EPIR）的程度。呼吸率，确定的O-2消耗，增强（在所有情况下，但一种情况下）由50-140%以下预暴露于高光子通量相比，获得稳态暗呼吸率。EPIR的程度更依赖于光子通量比曝光时间，虽然后者确实有一定的影响。在球等鞭金藻和角毛藻calcitrens，EPIR效应也表现出使用[C-14]CO2的演变。在I.galbana中，从预先暴露于高光子通量的一段时间的细胞中释放的CO2从碳水化合物和低分子量代谢物中释放得最快。从海链藻中获得的数据表明，在低光子通量下生长的细胞比在高光子通量下生长的细胞更容易受到EPIR的影响。这些结果进行了讨论的背景下，已提出的各种假设，关于EPIR效应的机制。
The extent of enhanced post-illumination respiration (EPIR) has been investigated in a number of microalgae. Respiration rates, as determined by O-2 consumption, were enhanced (in all but one case) by 50-140% following pre-exposure to high photon flux compared to rates obtained for steady-state dark respiration. The extent of EPIR was dependent more on photon flux than on duration of exposure, although the latter did have some effect. In Isochrysis galbana and Chaetoceros calcitrens, EPIR effects were also demonstrated using [C-14]CO2 evolution. In I.galbana, release of CO2 from cells pre-exposed to a period of high photon flux was most rapid from carbohydrate and low-molecular-weight metabolites. Data obtained from Thalassiosira weisflogii indicate that cells grown at low photon flux are more susceptible to EPIR than those grown under high photon flux. These results are discussed in the context of various hypotheses that have been proposed regarding the mechanism of EPIR effects.