Inshore water collected near Plymouth during the late summer and autumn of 1945, after enrichment with nitrate, phosphate and iron, did not support continued growth of a species of Chlamydomonas, of Chlorella, of a Cryptomonad and of two species of Chrysomonads.The addition of 0-5-2-0 mg. Mn" or Mnv/m.3 allowed vigorous growth and the production of heavy crops. The effect on Chlamydomonas of adding as little as o-i mg./m.3 was apparent.The growth of Coscinodiscus excentricus varied in waters collected from inshore and from offshore which had been similarly enriched with N, P and Fe. The addition of manganese had only a minor effect.The addition of other microelements to inshore waters enriched with N, P, Fe and Mn did not affect growth rate of Chlamydomonas. Manganese starvation led to the production of small Chlamydomonas cells.Manganese starvation caused a resting condition or lag period in Chlorella. A supply of manganese alone was insufficient for recovery; a period of illumination was also required for internal changes to take place before logarithmic growth was resumed.The addition of manganese was effective when either nitrate or ammonium was supplied as source of nitrogen, in dim, bright, continuous, or discontinuous illumination.Metabolic products which leached out of the cells into the water during the growth of both Chlorella sp. and of Nitzschia closterium acted as a growth stimulant.Manganese at great dilution is rapidly 'collected' from solution by Chlorella. During growth this alga abstracts a material proportion from water containing 5 mg. Mn/m.3Using Chlamydomonas as 'analyst', it was found that added organic detritus, or the corpses of marine bacteria, adsorbed a material proportion of the manganese in sea water containing 1-2 mg. Mn/m.3

中文翻译：

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锰与浮游植物的生长

1945 年夏末和秋季在普利茅斯附近收集的近海水，在富含硝酸盐、磷酸盐和铁后，不支持一种物种的持续生长。衣藻， 的小球藻，一种 Cryptomonad 和两种 Chrysomonads。添加 0-5-2-0 毫克。Mn" 或 Mnv/m.3 允许旺盛的生长和重作物的生产。衣藻添加少至 oi mg./m.3 是显而易见的。在从近岸和近海收集的同样富含 N、P 和 Fe 的水域中，Coscinodiscus excentricus 的生长各不相同。锰的添加影响不大。在富含N、P、Fe和Mn的近海水域中添加其他微量元素不影响衣藻的生长速度。锰的匮乏导致小产量衣藻细胞。锰饥饿导致了一个静止状态或滞后期小球藻. 仅锰的供应不足以恢复；在恢复对数生长之前，内部变化也需要一段时间的光照。当硝酸盐或铵作为氮源，在昏暗、明亮、连续或不连续的光照下，添加锰是有效的。代谢产物在两者的生长过程中从细胞中渗出到水中小球藻. 和Nitzschia closterium充当生长刺激剂。高度稀释的锰通过以下方法从溶液中迅速“收集”小球藻. 在生长过程中，这种藻类从含有 5 毫克的水中提取了一定比例的物质。锰/米。3使用衣藻作为“分析员”，发现添加的有机碎屑或海洋细菌的尸体，吸附了海水中含有1-2毫克锰的物质比例。锰/米3