Department of Botany, Tel Aviv University, Tel Aviv 69978, Israel.
Plant Physiol. 1985 Sep;79(1):199-201. doi: 10.1104/pp.79.1.199.
Net photosynthetic rates of Spirodela polyrrhiza turions, at low O(2) levels, were 6.2 and 38.8 micromoles O(2) per gram fresh weight per hour at 1 millimolar HCO(3) (-) and CO(2) saturation, respectively, and much lower in a regular low-pH growth solution. Air equilibration O(2) concentrations decreased rates considerably, except at CO(2) saturation. The surfacing rate of turions in various inorganic carbon surroundings correlated positively with their photosynthetic rates, but were the same at high and low O(2) levels. The relevance of these findings in relation to environmental conditions conductive to germination of autotrophically growing turions is discussed.
螺旋鱼腥藻冬芽在低氧水平下的净光合速率，分别在 1 毫摩尔 HCO3-(-)和 CO2 饱和条件下为 6.2 和 38.8 微摩尔 O2 每克鲜重每小时，在常规低 pH 值生长溶液中则低得多。空气平衡 O2 浓度显著降低了反应速率，除了在 CO2 饱和条件下。在各种无机碳环境中冬芽的出芽率与它们的光合速率呈正相关，但在高氧和低氧水平下是相同的。讨论了这些发现与有利于自养生长冬芽萌发的环境条件的相关性。
