Photosynthesis, carbon flows and growth of Oscillatoria agardhii Gomont in environments with a periodic supply of light
Photosynthesis, carbon flows and growth of Oscillatoria agardhii Gomont in environments with a periodic supply of light
复制标题
周期性光照环境中阿加迪颤藻的光合作用、碳流和生长
DOI：
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发表时间：
1986
期刊：
影响因子：
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通讯作者：
L. Mur
中科院分区：
文献类型：
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作者：
A. Post;Johan G. Loogman;L. Mur
蓝藻 Oscillatoria agardhii 在连续培养物中生长，光照周期不同，光照时间恒定。较短光照周期的生长导致了光限制培养。磷
max 是唯一反映较短光照周期下色素含量增加的光合参数； α 和 q
光照时间为 8 小时或更少时，O2 最大。碳水化合物池与光/暗循环的动态用三个最大值的概念来描述：最大积累率、最大含量和最大消耗率。随着光照时间的缩短，碳的生长产量增加，碳水化合物的暗生长产量值也增加。光照时间 > 8 小时，蛋白质合成率在光照和黑暗条件下相等；随着光照时间的缩短，黑暗中蛋白质合成的速率严重下降。根据 O. agardhii 对光/暗循环变化的反应，我们区分了生长调节不同的四个范围。强调了光合作用装置在对辐照度或光照周期变化的不同反应中的核心作用。
The cyanobacterium Oscillatoria agardhii was grown in continuous cultures with light periods of various duration at a constant irradiance. Growth at shorter light periods led to light-limited cultures. P
max was the only photosynthetic parameter that reflected increasing pigment contents at shorter light periods; α and q
O2 were maximal with light periods of 8 h and less. The dynamics of the carbohydrate pool with light/dark cycles are described in a concept of three maxima: a maximum accumulation rate, a maximum content and a maximum consumption rate. With shorter light periods the growth yield on carbon increased as did yield values for dark growth on carbohydrate. Rates of protein synthesis were equal in the light and dark for light periods > 8 h; with shorter light periods the rates of protein synthesis in the dark showed a severe drop. From the response of O. agardhii to changes in light/dark cycle we distinguished four ranges in which regulation of growth differed. The central role of the photosynthetic apparatus in the different responses to changes in either irradiance or light period is stressed.