Photoacoustic spectroscopy of thermal relaxation processes of solar energy in the photosynthetic apparatus of plants

Zakhidov, E. A.; Kokhkharov, A. M.; Kuvondikov, Vakhobjon; Нематов, Ш. К.; Saparbaev, Aziz

doi:10.3103/s0003701x12010161

Cited by 3 publications

(3 citation statements)

References 8 publications

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“…Photoacoustic spectrometer of special design with ~1 cm 3 sample chamber having higher sensitivity at low (10-250 Hz) frequencies of light modulation [24] has been used for measuring photoacoustic characteristics of plant leaves. The sources of a CW measuring light and saturating light flashes of the spectrometer were a semiconductor LED (650 nm, 20 mW) and a halogen lamp (400-700 nm, 20 W) with a mechanical chopper, respectively.…”

Section: Methodsmentioning

confidence: 99%

“…Photoacoustic waves generated in plant leaves at application of modulated light have been studied for precise control of the photosynthetic performance and quantitative estimation of the photosynthetic oxygen evolution. Photobaric component of the photoacoustic waves related to photosynthetic evolution of oxygen has been measured in the photoacoustic cell of special design with a small measuring chamber (~1 cm 3 ) in lock-in amplifier by selecting quadrature signal at low frequencies [15,54]. Figure 3 shows kinetics of changes of the photoacoustic signal from the well-watered (relative water content 100%) and short-term dehydrated (relative water content 65%) leaves of the cotton genotype Navbakhor, generated at application of low frequency (10 Hz) measuring light.…”

Section: Comparative Measurements Of ф Psii In Different Cotton Genotmentioning

confidence: 99%

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Monitoring of the Drought Tolerance of Various Cotton Genotypes Using Chlorophyll Fluorescence

Zakhidov¹,

Нематов²,

Kuvondikov³

2016

Applied Photosynthesis - New Progress

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In this chapter, chlorophyll fluorescence in plant leaves of three genotypes of cotton cultivated in Uzbekistan and characterized at different degrees of drought tolerance is studied. The light and CO responses of the chlorophyll fluorescence and the photosynthesis and possible mechanisms of adaptation of plants to moderate long-term drought are described. The chlorophyll fluorescence and various morpho-physiological indicators of well-watered and moderately drought-stressed cotton plants have been measured simultaneously over a long period of plant ontogenesis to establish direct correlations between them to estimate the magnitude of drought effect using fluorescence parameters. It is shown that determination of such correlations and their calibration by photoacoustic signals generated in plant leaves at application of lowfrequency-modulated light may be used for monitoring of the drought tolerance of crops in the field.

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Section: Methodsmentioning

confidence: 99%

Section: Comparative Measurements Of ф Psii In Different Cotton Genotmentioning

confidence: 99%

Monitoring of the Drought Tolerance of Various Cotton Genotypes Using Chlorophyll Fluorescence

Zakhidov¹,

Нематов²,

Kuvondikov³

2016

Applied Photosynthesis - New Progress

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“…En otros estudios con plantas de importancia agronómica, como el fríjol, la caña de azúcar, el tomate y el maíz, se han hecho experimentos en individuos afectados por hongos patógenos (Rai, et al, 2001), en simbiosis con micorrizas (Sánchez-Rocha, et al, 2008) y tratados con bacterias promotoras del crecimiento (Gordillo-Delgado, et al, 2016). Asimismo, algunos autores han reportado resultados de la aplicación de la técnica en plantas expuestas a diferentes intensidades de luz (Zakhidov, et al, 2012;Veljovi´c-Jovanovi´c, et al, 2016).…”

Section: Introductionunclassified

Monitoreo fotoacústico de plantas Musa acuminata (Musaceae) infectadas con el hongo Fusarium oxysporum (Nectriaceae)

Gordillo-Delgado

Botero-Zuluaga

2020

Rev. Acad. Colomb. Cienc. Ex. Fis. Nat.

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La técnica fotoacústica permite evaluar el comportamiento de la razón de evolución de oxígeno de las plantas, el cual es un indicador del rendimiento fotosintético. En este estudio se monitoreó este parámetro y el crecimiento de un grupo de plantas de banano Gros Michel (Musa AAA), infectadas con Fusarium oxysporum f.sp. cubense, patógeno causante de la marchitez vascular, una enfermedad destructiva que amenaza la sostenibilidad de los cultivares sensibles a ella en las regiones productoras. La infección efectiva de las plantas y el progreso de la marchitez comúnmente se evalúan a partir de la manifestación de los primeros síntomas externos de clorosis en las hojas bajeras, a los que se asigna un valor cuantitativo según su gravedad. Aunque en el análisis de la razón de evolución de oxígeno y del crecimiento no se encontraron diferencias estadísticas significativas entre las plantas infectadas con Fusarium oxysporum f.sp. cubense y las plantas sanas, se demostró que esta técnica permite incluir caracteres fenotípicos relacionados con la actividad fotosintética en la caracterización de los cultivos. Los resultados en cuanto a la afectación de la enfermedad se pueden asociar con las condiciones de cultivo en invernadero y con la etapa asintomática de la enfermedad en la que se hizo la observación.

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A Low-Frequency Photoacoustic Spectrometer with an RGB Light-Emitting Diode for Evaluating Photosynthetic Activity in Plant Leaves

et al. 2019

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Photoacoustic spectroscopy of thermal relaxation processes of solar energy in the photosynthetic apparatus of plants

Cited by 3 publications

References 8 publications

Monitoring of the Drought Tolerance of Various Cotton Genotypes Using Chlorophyll Fluorescence

Monitoring of the Drought Tolerance of Various Cotton Genotypes Using Chlorophyll Fluorescence

Monitoreo fotoacústico de plantas Musa acuminata (Musaceae) infectadas con el hongo Fusarium oxysporum (Nectriaceae)

A Low-Frequency Photoacoustic Spectrometer with an RGB Light-Emitting Diode for Evaluating Photosynthetic Activity in Plant Leaves

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