COMPARISON OF PHOTOSYNTHETIC PERFORMANCE AND CARBOXYLATION CAPACITY IN A RANGE OF AQUATIC MACROPHYTES OF DIFFERENT GROWTH FORMS
COMPARISON OF PHOTOSYNTHETIC PERFORMANCE AND CARBOXYLATION CAPACITY IN A RANGE OF AQUATIC MACROPHYTES OF DIFFERENT GROWTH FORMS
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DOI：
10.1016/0304-3770(93)90078-b
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发表时间：
1993-02-01
期刊：
影响因子：
1.8
通讯作者：
BEER, S
中科院分区：
文献类型：
--
作者：
MADSEN, TV;SANDJENSEN, K;BEER, S
测定了35种不同分类、生长形态和生境的沉水植物的光合作用、碳提取能力和1，5-二磷酸核酮糖羧化酶/加氧酶（RUBISCO）活性。光合速率每单位的叶绿素和干重在环境CO2浓度（约15 μ M），以及碳提取能力的植物群体之间的顺序增加：isoetids，两栖类，elodeids没有明显的HCO 3-使用，elodeids与HCO 3-使用，海洋被子植物和海洋大型藻类。光合速率在CO2浓度升高（300-350 μ M）表现出相同的模式，但组间差异较小。只有对于一些海洋大型藻类光合作用在环境CO2的光合作用方法在升高的CO2。具有高碳提取能力的物种，可能是基于活性HCO 3-使用，通常具有低RUBISCO活性，低叶绿素含量和低表面体积比。相反的模式中发现的物种与低的碳提取能力。具有高碳运输能力的物种（即特别是海藻）的低叶绿素含量和高叶绿素特异性光合作用表明，当CO2浓缩系统运行时，与无机碳同化相关的运行成本降低。
Photosynthesis, carbon extraction capacity and ribulose-1,5-biphosphate carboxylase/oxygenase (RUBISCO) activity were determined for 35 species of submerged aquatic macrophytes differing with respect to taxonomy, growth form and habitat. Photosynthetic rates per unit of chlorophyll and dry weight at ambient CO2 concentrations (about 15 muM) as well as carbon extraction capacity increased among plant groups in the order: isoetids, amphibious species, elodeids with no apparent HCO3- use, elodeids with HCO3- use, marine angiosperms and marine macroalgae. Photosynthetic rates at elevated CO2 concentrations (300-350 muM) showed the same pattern but smaller differences among the groups. Only for some of the marine macroalgae did photosynthesis at ambient CO2 approach photosynthesis at elevated CO2. Species with high carbon extraction capacity, presumably based on active HCO3- use, usually had low RUBISCO activity, low chlorophyll content and low surface to volume ratio. The opposite pattern was found among species with low carbon extraction capacity. The low chlorophyll content and high chlorophyll specific photosynthesis of species with high carbon transport capability (i.e. particularly the marine algae), suggest that running costs associated with inorganic carbon assimilation are reduced when a CO2 concentrating system operates.