Photoacoustic assessment of the in vivo genotypical response of corn to toxic aluminium

Marquezini, M. V.; Cella, N.; Silva, Edson C.; Serra, Dinah B.; Lima, C.A.S.; Vargas, H.; Prioli, Alberto José; Silva, William José da

doi:10.1039/an9901500341

Cited by 12 publications

(5 citation statements)

References 4 publications

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“…In recent papers we have demonstrated the capability of open photoacoustic cell (OPC) detection to perform in uiuo spectroscopic studies of leaf samples [I] and in vivo assessment of the genotypical response of the corn plant to aluminium toxicity [2]. The OPC technique has been proposed as an alternative photoacoustic (PA) detection method [3, 41. In the OPC configuration no additional transducer medium is required, such as the air chamber of conventional PA (for PA review see [SI and [SI), once the sample is placed on top of a commercial electret microphone and its front air chamber is used as the transducer medium itself.…”

Section: Introductionmentioning

confidence: 99%

OPC technique for in vivo studies in plant photosynthesis research

Pereira

Zerbetto

Silva

et al. 1992

Meas. Sci. Technol.

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The open photoacoustic cell (OPC) technique is applied to photosynthesis research in leaves, where the leaf is still attached to the plant. It is shown that real in situ and in vivo measurements of photosynthetic activities in leaves can be performed. The dehydration effect after cutting the leaf from the plant was monitored and some qualitative measurements related to photosynthetic activities are reported in order to show the usefulness of this technique in this field.

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Section: Introductionmentioning

confidence: 99%

OPC technique for in vivo studies in plant photosynthesis research

Pereira

Zerbetto

Silva

et al. 1992

Meas. Sci. Technol.

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“…6) An open-cell PA radiation detector was described by da Silva et al (1987) where the front chamber of the microphone itself is fixed to a leaf with silicone grease and acts as the usual gas chamber (Bentos et al 1989). With this technique Marquezini et al (1990) measured absorption spectra photoacoustically for Zea leaves.…”

Section: Discussionmentioning

confidence: 99%

A gas-permeable photoacoustic cell

Fork

Herbert

1991

Photosynth Res

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A photoacoustic cell assembly is described that is permeable to CO2 and other gases but not water vapor. As a replacement for the usually employed solid cover, this cell uses a cover containing a small fritted glass disk that holds a small piece of 6.4 μm Teflon film against the sample.With the above arrangement it was possible to increase the rate of O2 evolution measured photoacoustically about 3 times in Zea mays leaves and about 1.7 times in Phaseolus vulgaris leaves upon adding CO2 to the gas stream. The extent of energy storage was also enhanced with supplemental CO2 in Zea and Ulva but less so in Phaseolus. The maximum improvements of photosynthetic activities were obtained when the gas stream contained 2.5-5% CO2. These high concentrations were presumably necessary as the result of a high resistance to diffusion through the gas-permeable cover.

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“…After being characterized by Silva et al [6] as a radiation detector, Bento et al [17] used the OPC concept to detect X-rays, while Nery et al [7] used it in spectroscopic studies to monitor herbicide activity in leaves. The response of plants to toxic substances was studied by Marquezini et al [18] who monitored the effects of the toxic action of aluminum on maize specimens through spectroscopic measurements performed with the OPC set-up. Pereira et al [19] also worked on the characterization of maize leaves, studying differences in the spectra of mutants and wild maize types.…”

Section: Open Photoacoustic Cell (Opc)mentioning

confidence: 99%

Open Photoacoustic Cell: Applications in Plant Photosynthesis Studies

Mesquita

Mansanares

Silva

et al. 2006

Instrumentation Science & Technology

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In this article, we review the applications of the open photoacoustic cell (OPC) technique in studies of photosynthetic activity in plant leaves. The ability to perform in vivo and in situ measurements makes this technique particularly suitable for monitoring photosynthesis of plants subjected to specific treatments. Therefore, our objective in the present article is to describe, in more detail, the principles of the OPC technique and to follow the historical path of its applications related to the study of plants and photosynthesis, including recent results.It will be shown that the technique has been used to observe spectroscopic responses to herbicide application and to soil toxicity, in the study of photosynthesis induction, gas exchange, photochemical loss, photoinhibition, photosynthesis saturation, and photosynthetic responses to changes in parameters such as temperature, atmospheric conditions, and nutrient availability. Recent results have demonstrated its usefulness in the determination of the action spectrum directly from oxygen evolution measurements.

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Photoacoustic assessment of the in vivo genotypical response of corn to toxic aluminium

Cited by 12 publications

References 4 publications

OPC technique for in vivo studies in plant photosynthesis research

OPC technique for in vivo studies in plant photosynthesis research

A gas-permeable photoacoustic cell

Open Photoacoustic Cell: Applications in Plant Photosynthesis Studies

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