Effects of light intensity on the growth of Cryptomonas sp. (Cryptophyceae)
Effects of light intensity on the growth of Cryptomonas sp. (Cryptophyceae)
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DOI：
10.1007/s00254-008-1277-1
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发表时间：
2009-03
期刊：
影响因子：
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通讯作者：
H. Weng;Ya-Chao Qin;Xiang-wei Sun;Xunhong Chen;J. Chen
中科院分区：
文献类型：
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作者：
H. Weng;Ya-Chao Qin;Xiang-wei Sun;Xunhong Chen;J. Chen
通过室内培养实验，研究了光照强度对隐藻生长的影响。以及不同光照条件下对铁、磷吸收的差异。结果表明，藻类生长速率与光照强度呈指数相关。Cryptomonassp的饱和和半饱和光值。细胞分别为150和47μ摩尔光子和m−2s−1。虽然藻类生长速度较慢，但在弱光培养条件下，藻类对铁、磷和锌、锰、钴、钼等微量元素的吸收较多。10μ摩尔光子对m−2s−1的生长速率仅为150μ摩尔光子对m−2s−1的10%，而Fe和P的吸收分别增加了150和100%。这些结果表明，不同光强下铁和磷吸收的差异对有害藻华(HAB)的发生具有潜在的意义。文中还讨论了光强调节养分吸收的机制以及赤潮的发生。
Laboratory culture experiments have been conducted to evaluate the effects of light intensity on the growth ofCryptomonassp. (Cryptophyceae) and the discrepancy in absorption of iron and phosphorus under different light conditions. Results show that there is an exponential correlation between algal growth rate and light intensity. The saturating and semi-saturating light values forCryptomonassp. cells are 150 and 47 μmol photons m−2s−1, respectively. More uptake of Fe, P, and other trace elements such as Zn, Mn, Co, and Mo is observed in the low light cultures, although the algal growth rates are slow. The growth rate at 10 μmol photons m−2s−1is only 10% of that at 150 μmol photons m−2s−1, whereas Fe and P uptake increases by 150 and 100%, respectively. These results suggest potential implications of differentiation in absorption of iron and phosphorus at different light intensities for the occurrence of harmful algal blooms (HABs). The mechanisms of light intensity regulating nutrient uptake as well as the occurrence of HABs are also discussed.