Are bryophytes shade plants?: Photosynthetic light responses and proportions of chlorophyll a, chlorophyll b and total carotenoids
Are bryophytes shade plants?: Photosynthetic light responses and proportions of chlorophyll a, chlorophyll b and total carotenoids
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DOI：
10.1093/aob/mch178
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发表时间：
2004-10-01
期刊：
影响因子：
4.2
通讯作者：
Proctor, MCF
中科院分区：
文献类型：
--
作者：
Marschall, M;Proctor, MCF
背景与目的研究了39种苔藓和16种苔类植物的叶绿素/类胡萝卜素比值、光合作用电子流的光饱和度和光合作用CO2吸收的数据，这些数据与苔藓细胞一般具有遮荫植物特性有关。用(调制的)叶绿素花期绘制了光饱和曲线，用红外气体分析法绘制了一些物种的光饱和曲线。中位数(苔藓/地钱)为：总叶绿素1.64/3-76 mg g(-1)，叶绿素a：B2(.)29/1(.99)，叶绿素：类胡萝卜素4(.)74/6(.)75。95%饱和度时的PPFD值(从拟合曲线估计)也变化很大，但几乎都是
Background and Aims Data are presented from 39 species of mosses and 16 liverworts for ratios of chlorophylls and total carotenoids, and light saturation of photosynthetic electron flow or photosynthetic CO2 uptake, in relation to the postulate that bryophyte cells in general show shade-plant characteristics.Methods pigment concentrations were measured by spectrophotometer in 80 % acetone extracts. Light-saturation curves were constructed by (modulated) chlorophyll florescence and for some species by infra-red gas analysis.Key Results The pigment measurements were widely variable but broadly in line with the findings of previous authors. Median value's (mosses/liverworts) were: total chlorophyll, 1.64/3-76 mg g(-1); chlorophyll a : b 2(.)29/1(.)99; chlorophylls: carotenoids, 4(.)74/6(.)75). The PPFD values at 95 % saturation (estimated from fitted curves) also ranged widely, but were almost all