六種蕨類葉片的氣孔對藍光與二氧化碳濃度之反應

黃怡清

doi:10.6342/NTU.2015.02521

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六种蕨类叶片的气孔对蓝光与二氧化碳浓度之反应

Leaf stomatal response to blue light and CO2 concentration in six fern species

黄怡清 , 硕士　　导师：高文媛　　

繁体中文 DOI： 10.6342/NTU.2015.02521

蕨类、气孔反应、蓝光、二氧化碳浓度、气体交换； Fern ； stomatal response ； blue-light specific response ； CO2 concentration ； gas exchange

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摘要 │ 参考文献 (84) │ 国际计量

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Stomata, pores for gas exchange between leaves and atmosphere, are surrounded by a pair of guard cells. The evolution of stomata is an important adaptation for plants to live on land. It is well known that environmental factors, such as light and CO2 concentration ([CO2]), can affect stomatal openness in angiosperms. Recently, stomata of ferns were found less sensitive to the environmental factors. However, previous studies showed that stomatal response in Marsilea crenata (a fern species) is similar to that in angiosperms. To know whether stomata of other ferns also react the same or not, I measured some leaf characteristics, stomatal distribution and stomatal response of Cibotium taiwanense, Cyathea lepifera, Adiantum capillus-veneris, Vittaria anguste-elongata, Woodwardia prolifera, Asplenium australasicum, six fern species belonging to different clades and distributed in habitats with diffent light regimes.
    I transplanted field growing plants and grew them in a greenhouse. After they have established, I measured stomatal morphology and leaf characteristics of these plants and stomatal conductance (gs, a measurement of stomatal openness) when leaves were under the condition of 50 μmol m-2 s-1 blue light superimposed onto the red light and under different [CO2] (100, 400, 600 ppm). I also compared gs of the same species grown under different light intensity.
    The six ferns have stomata only on abaxial surface. Stomatal density (11.7 ~ 259.9 mm-2) of leaves follows: C. lepifera = C. taiwanense > W. prolifera > A. capillus-veneris = V. anguste-elongata = A. australasicum. Stable carbon isotope analysis revealed that these six ferns are C3 plants, and A. australasicum has the highest water use efficiency while V. anguste-elongata the lowest among the six ferns. Stomata of these six ferns didn’t response further under the condition of superimposed blue light onto the red light indicating no blue-light specific response. In comparison to gs at 400 ppm of [CO2], gs of the six species showed three different degrees of change in response, which indicates that their stomata have different sensitity to changes in [CO2]. Stomatal conductance of same species grown under two light intensity have greater difference in low [CO2] (100 ppm). 
    In conclusion, the stomata of the six fern species showed different degree of response in three [CO2] which did not follow their evolutionary order. The light intensity of their habitats may have an effect on their stomatal response.

参考文献 ( 84 ) 〈TOP〉

Assmann, S. M. 1988. Enhancement of the stomatal response to blue light by red light, reduced intercellular concentrations of CO2, and low vapor pressure differences. Plant Physiology 87: 226-231.
连结：
Assmann, S. M., Simoncini, L., Schroeder, J. I. 1985. Blue light activates electrogenic ion pumping in guard cell protoplasts of Vicia faba. Nature 318: 285-287.
连结：
Bannister, P., Wildish, K. L. 1982. Light compensation points and specific leaf areas in some New Zealand ferns. New Zealand Journal of Botany 20: 421-424.
连结：
Bedard-Haughn, A., Van Groenigen, J. W., Van Kessel, C. 2003. Tracing 15N through landscapes: potential uses and precautions. Journal of Hydrology 272: 175-190.
连结：
Berner, R. A. 1990. Atmospheric carbon dioxide levels over Phanerozoic time. Science 249: 1382-1386.
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使用DOI作为永久连结

引用含有DOI的文献

DOI可强化引用精确性、增强学术圈连结，并给予使用者跨平台的良好使用经验，目前在全世界已有超过五千万个对象申请DOI。 如想对DOI的使用与概念有进一步了解，请参考 （ ） 。

DOI可强化引用精确性、增强学术圈连结，并给予使用者跨平台的良好使用经验，目前在全世界已有超过五千万个对象申请DOI。如想对DOI的使用与概念有进一步了解，请参考（）。