Rapid response of leaf photosynthesis in two fern species Pteridium aquilinum and Thelypteris dentata to changes in CO2 measured by tunable diode laser absorption spectroscopy.
Rapid response of leaf photosynthesis in two fern species Pteridium aquilinum and Thelypteris dentata to changes in CO2 measured by tunable diode laser absorption spectroscopy.
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叶片光合作用在两个蕨类物种翼虫和thelypteris dentata中对通过可调二极管激光吸收光谱测量的二氧化碳变化的快速反应。
DOI：
10.1007/s10265-015-0736-5
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发表时间：
2015-09
影响因子：
2.8
通讯作者：
Hanba YT
中科院分区：
文献类型：
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作者：
Nishida K;Kodama N;Yonemura S;Hanba YT
我们调查了气孔导度（GS）和叶肉导度（GM）在两个原始的陆地植物，蕨类植物种蕨和Thelypteris dentata，使用同时测量叶气体交换和碳同位素歧视大气CO2浓度[CO2]。[CO2]最初从400 μmol mol−1降至200 μmol mol−1，然后从200 μ mol mol − 1升至700 μmol mol−1，最后从700 μ mol mol − 1降至400 μmol mol−1。通过可调谐二极管激光吸收光谱（TDLAS）的分析表明，在几分钟内的gm的快速和连续的响应。在大多数情况下，这两种蕨类植物表现出快速和显着的响应gm [CO2]的变化。当[CO2]从400 μ mol mol − 1降低到200 μmol mol−1时，获得了最大的变化（引用降低百分比）。这与被子植物相反，在被子植物中，通常在低[CO2]下观察到gm增加。同样，蕨类植物观察到很少或根本没有响应GS的变化[CO2]，而伴随下降的gm和GS与[CO2]经常在被子植物报道。总之，这些结果表明，调节gm [CO2]可能不同的被子植物和蕨类植物。
We investigated stomatal conductance (gs) and mesophyll conductance (gm) in response to atmospheric CO2 concentration [CO2] in two primitive land plants, the fern species Pteridium aquilinum and Thelypteris dentata, using the concurrent measurement of leaf gas exchange and carbon isotope discrimination. [CO2] was initially decreased from 400 to 200 μmol mol−1, and then increased from 200 to 700 μmol mol−1, and finally decreased from 700 to 400 μmol mol−1. Analysis by tunable diode laser absorption spectroscopy (TDLAS) revealed a rapid and continuous response in gm within a few minutes. In most cases, both ferns showed rapid and significant responses of gm to changes in [CO2]. The largest changes (quote % decrease) were obtained when [CO2] was decreased from 400 to 200 μmol mol−1. This is in contrast to angiosperms where an increase in gm is commonly observed at low [CO2]. Similarly, fern species observed little or no response of gs to changes in [CO2] whereas, a concomitant decline of gm and gs with [CO2] is often reported in angiosperms. Together, these results suggest that regulation of gm to [CO2] may differ between angiosperms and ferns.