Dependence of stomatal conductance on leaf chlorophyll concentration and meteorological variables

Matsumoto, Kazuho; Ohta, Takeshi; Tanaka, Takafumi

doi:10.1016/j.agrformet.2005.07.001

Cited by 69 publications

(41 citation statements)

References 24 publications

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“…This result is in agreement with the findings of Sellers et al [85], Myneni et al [86], Verma et al [87] and Carter [88], who reported strong linear or non-linear relationships between vegetation indices calculated using VIS and NIR bands, and G s . G s is an integrative stress indicator by responding to all external (soil water availability and vapor pressure deficit) and internal (abscisic acid, xylem conductivity, chlorophyll content and leaf water status) influences caused by water stress [89][90][91][92]. This may explain the broad spectral regions with the combination of different wavelengths that correlated well with G s .…”

Section: Discussionmentioning

confidence: 81%

Early Detection of Plant Physiological Responses to Different Levels of Water Stress Using Reflectance Spectroscopy

et al. 2017

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Early detection of water stress is critical for precision farming for improving crop productivity and fruit quality. To investigate varying rootstock and irrigation interactions in an open agricultural ecosystem, different irrigation treatments were implemented in a vineyard experimental site either: (i) nonirrigated (NIR); (ii) with full replacement of evapotranspiration (FIR); or (iii) intermediate irrigation (INT, 50% replacement of evapotranspiration). In the summers 2014 and 2015, we collected leaf reflectance factor spectra of the vineyard using field spectroscopy along with grapevine physiological parameters. To comprehensively analyze the field-collected hyperspectral data, various band combinations were used to calculate the normalized difference spectral index (NDSI) along with 26 various indices from the literature. Then, the relationship between the indices and plant physiological parameters were examined and the strongest relationships were determined. We found that newly-identified NDSIs always performed better than the indices from the literature, and stomatal conductance (G s ) was the plant physiological parameter that showed the highest correlation with NDSI(R 603 ,R 558 ) calculated using leaf reflectance factor spectra (R 2 = 0.720). Additionally, the best NDSI(R 685 ,R 415 ) for non-photochemical quenching (NPQ) was determined (R 2 = 0.681). G s resulted in being a proxy of water stress. Therefore, the partial least squares regression (PLSR) method was utilized to develop a predictive model for G s . Our results showed that the PLSR model was inferior to the NDSI in G s estimation (R 2 = 0.680). The variable importance in the projection (VIP) was then employed to investigate the most important wavelengths that were most effective in determining G s . The VIP analysis confirmed that the yellow band improves the prediction ability of hyperspectral reflectance factor data in G s estimation. The findings of this study demonstrate the potential of hyperspectral spectroscopy data in motoring plant stress response.

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Section: Discussionmentioning

confidence: 81%

Early Detection of Plant Physiological Responses to Different Levels of Water Stress Using Reflectance Spectroscopy

et al. 2017

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“…The evapotranspiration from each component of an ecosystem, such as transpiration from leaves or evaporation from the soil surface, can be directly measured using a leaf chamber or lysimeter [e.g., Kosugi et al, 2003;Matsumoto et al, 2005;Daikoku et al, 2008;Deguchi et al, 2008]. Also, the evapotranspiration of whole trees can be estimated from sap-flux measurements [e.g., Wilson et al, 2001;Kumagai et al, 2008].…”

Section: Introductionmentioning

confidence: 99%

Estimation of Bedrock Infiltration on a Weathered Granitic Mountain Covered by Japanese Cypress Forest using Water-Budget and Eddy Covariance Methods

Matsumoto

Kosugi

Katsuyama

et al. 2011

IJECE

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At a watershed underlain by weathered granitic bedrock (5.99 ha) and covered by Japanese cypress forest, we estimated apparent bedrock infiltration (Q B ) by extracting evapotranspiration measured by eddy covariance (E EC ) from the residual of the water budget (E WB = precipitation -runoff) over an 8-year period (2001)(2002)(2003)(2004)(2005)(2006)(2007)(2008). The degree of interannual variation in E EC was relatively small throughout this period. Conversely, E WB showed larger annual variations and positive dependence on annual precipitation. The difference between E EC and E WB was greater in the years with more precipitation. Therefore, estimated values of Q B also showed positive dependence on annual precipitation. Observed average annual precipitation, runoff, E EC , and estimated Q B were 1549, 722, 742, and 86 mm year -1 , respectively. Consequently, Q B is believed to have amounted to 0-10% (average 5%) of total precipitation. The findings suggest that episodes of rainfall with medium and high intensity induce lower and higher Q B values, respectively, with similar amounts of precipitation.

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“…En consecuencia, la conductancia estomática (gs) es un factor importante en el ciclo y el equilibrio de agua, CO 2 , y la energía entre las plantas y la atmósfera. El contenido de clorofila de las hojas a menudo se utiliza como parámetro del estado fisiológico de la planta (García et al, 2005;Matsumoto et al, 2005). En algunos estudios, la dependencia de la conductancia estomática se relaciona con la clorofila de la hoja (Matsumoto et al, 2005).…”

Section: Introductionunclassified

“…El contenido de clorofila de las hojas a menudo se utiliza como parámetro del estado fisiológico de la planta (García et al, 2005;Matsumoto et al, 2005). En algunos estudios, la dependencia de la conductancia estomática se relaciona con la clorofila de la hoja (Matsumoto et al, 2005). Asimismo, la disminución de la conductancia estomática puede tener efecto negativo sobre la tasa fotosintética, por lo que puede reducir el potencial de rendimiento de los cultivos (Gilbert et al, 2011).…”

Section: Introductionunclassified

Pigmentos fotosintéticos y conductancia estomática en ecotipos de copoazú (Theobroma grandi orum Willd. Ex. Spreng K. Schum.).

et al. 2016

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El objetivo del presente trabajo fue evaluar la variabilidad del contenido de pigmentos fotosintéticos y la conductancia estomática diaria en relación con las variables ambientales en ecotipos de copoazú (Theobroma grandi orum). Los ecotipos utilizados formaban parte del banco de germoplasma de la Universidad de la Amazonia (Colombia). El estudio se realizó durante el año 2015. Se colectaron cuatro hojas del estrato medio de cuatro plantas por cada ecotipo, para hacer extracción y lecturas a diferentes niveles de absorbancia para determinar el contenido de pigmentos fotosintéticos. Durante las 04:00 a 18:00 h se monitoreó la conductancia estomática (gs) respecto a variables ambientales (humedad relativa, temperatura del aire, radiación y dé cit de presión de vapor (DPV). Se hizo un análisis de varianza utilizando la prueba de Tukey, se realizaron correlaciones y regresiones entre gs y variables ambientales. Los contenidos de cloro la a, b, total y carotenoides entre ecotipos fueron diferentes (P<0,0001), el ecotipo UA-31 presentó los mayores valores, contrastando con el ecotipo UA-37. A nivel de gs, la interacción ecotipo*hora presentaron diferencias signi cativas (P<0,0001). En promedio los ecotipos que presentaron mayores valores de gs fueron UA-67 y UA-039, esta variable presentó correlación negativa con temperatura (-0,84; P<0,0001), radiación (-0,91; P<0,0001) y DPV (-0,94; P<0,0001) contrario a lo presentado para humedad (0,90; P<0,0001). Los resultados sugieren que los ecotipos UA-039 y UA-31 fueron los más adecuados en cuanto al intercambio gaseoso y contenido de pigmentos fotosintéticos.

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Dependence of stomatal conductance on leaf chlorophyll concentration and meteorological variables

Cited by 69 publications

References 24 publications

Early Detection of Plant Physiological Responses to Different Levels of Water Stress Using Reflectance Spectroscopy

Early Detection of Plant Physiological Responses to Different Levels of Water Stress Using Reflectance Spectroscopy

Estimation of Bedrock Infiltration on a Weathered Granitic Mountain Covered by Japanese Cypress Forest using Water-Budget and Eddy Covariance Methods

Pigmentos fotosintéticos y conductancia estomática en ecotipos de copoazú (Theobroma grandi orum Willd. Ex. Spreng K. Schum.).

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