Fluorescencia como indicador de estrés en &lt;i&gt;Helianthus annuus&lt;/i&gt; L. Una revisión

Jiménez-Suancha, Sonia Constanza; Álvarado, S Oscar Humberto; Balaguera-López, Helber Enrique

doi:10.17584/rcch.2015v9i1.3753

Cited by 18 publications

(16 citation statements)

References 49 publications

(72 reference statements)

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“…The effective photochemical quantum yield of PSII (Y II ) indicates the part of the energy absorbed by chlorophyll, which is associated with PSII and is used in the photochemical activity, evidencing the sum of transported electrons and, thus, becomes an indicator for photosynthesis (Lichtenthaler et al, 2005;Jiménez-Suancha et al, 2015). Overall, the Y II of the waterlogged lulo plants decreased with the increased stress, as Else et al (2009) observed in tomatoes.…”

Section: Chlorophyll Fluorescence Parametersmentioning

confidence: 96%

“…Photochemical quenching (qP) quantifies the photochemical capacity of PSII and refers to the proportion of excitation energy trapped by open PSII reaction centers (Lichtenthaler et al, 2005;Hanelt, 2018). While non-photochemical quenching (NPQ) indicates the activation of non-photochemical processes that lead to the dissipation of non-radiant energy, such as changes in the transthylacoidal pH gradient, photoinhibition, interruption of light collection complexes, and formation of zeaxanthin, among others (Jiménez-Suancha et al, 2015;Rohaček, 2002).…”

Section: Chlorophyll Fluorescence Parametersmentioning

confidence: 99%

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Chlorophyll fluorescence and other physiological parameters as indicators of waterlogging and shadow stress in lulo (Solanum quitoense var. septentrionale) seedlings

Sánchez-Reinoso

Jiménez-Pulido

Martínez-Pérez

et al. 2019

Rev. Colomb. Cienc. Hortic.

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Climate change has resulted in an increasing frequency of the phenomenon “La Niña,” generating prolonged periods of waterlogging and low light. The objective of the present study was to evaluate the effects of two abiotic stresses: shading (65%) and waterlogging, and their interaction on fluorescence parameters of chlorophyll a in lulo (Solanum quitoense var. septentrionale) seedlings. A completely randomized design with a factorial arrangement was implemented. The first factor consisted of two levels of light (with and without shading). The second factor were four levels of duration of the waterlogging period (0, 3, 6 and 9 days), for a total of 8 treatments with three replicates. The response variables were recorded at 6, 12 and 18 days after the application of the waterlogging treatments began. Measurements of relative water content (RWC), electrolyte leakage, chlorophyll content and chlorophyll a fluorescence were recorded. The lulo plants appeared to be more susceptible to waterlogging than to shading, with a lower RWC when waterlogged 6 and 9 days, presenting damage at the level of photosystem II from day 3, causing a decrease in the chlorophyll content. The plants flooded under shading had a greater tolerance to this factor than those cultivated in full light. The techniques of quantification of the chlorophyll a fluorescence, especially the maximum quantum efficiency of the PSII, the effective photochemical quantum yield of PS II and the photochemical quenching were useful tools that characterized the lulo seedlings under stress conditions.

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Section: Chlorophyll Fluorescence Parametersmentioning

confidence: 96%

Section: Chlorophyll Fluorescence Parametersmentioning

confidence: 99%

Chlorophyll fluorescence and other physiological parameters as indicators of waterlogging and shadow stress in lulo (Solanum quitoense var. septentrionale) seedlings

Sánchez-Reinoso

Jiménez-Pulido

Martínez-Pérez

et al. 2019

Rev. Colomb. Cienc. Hortic.

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“…This dissipation of excess radiant energy as heat in the complex PSII antenna is a photoprotection induced by light through the thermal dissipation of energy. This is carried out in the xanthophyll cycle (Jiménez-Suancha et al, 2015, Ping et al, 2015. Furthermore, the increases were 388.5% at 17 DD, 484.3% at 21 DD, and 398.0% at 38 DD.…”

Section: Chlorophyll Fluorescencementioning

confidence: 99%

Growth, biomass distribution, gas exchange and chlorophyll fluorescence in cowpea (Vigna unguiculata (L.) Walp.) under drought conditions

et al. 2020

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Drought modifies plant development and generates losses in agricultural production. The aim of this study was to analyze the growth, biomass distribution, gas exchange, and chlorophyll fluorescence in nine cowpea (Vigna unguiculata) genotypes under drought conditions in the greenhouse condition. A completely randomized experimental design with four replicates was used. The following genotypes (treatments) of LC-006-016, LC-029-016, LC-036-016, LC-021-016, LC-005-016, LC-009-016, LC-014-016, LC-002-016, and Caupicor-50 (control) were evaluated with irrigation for 21 days (after sowing) and 38 days of drought (DD) for a total duration of 59 days. In a simultaneous experiment, other plants of the same genotypes were irrigated for 59 days after sowing (DAS) with replacement of evapotranspirated water every three days. Measures of plant height and number of leaves were taken every four days, biomass at 59 days, gas exchange every seven days and chlorophyll fluorescence at 17, 21 and 38 DD. Moisture losses were quantified by recording the loss of soil weight every three days. The results showed that plant height reached 72.2% lower in plants under drought, while the vegetative biomass decreased by 76.3%. The photosynthesis, stomatal conductance, and transpiration were decreased 64.6%, 93.1%, and 86.9% under drought, respectively. Furthermore, intrinsic water use efficiency (A/gs) was increased almost six times. However, it was decreased when drought progressed towards the soil water content loss more than 0.0827 g.g-1. The quantum yield of photosynthesis (ΦPSII) was decreased 28.4%, 40.3% and 43.5% at 17, 21 and 38 DD, respectively, under drought condition. The principal component analysis (PCA) suggests that the genotypes with higher A/gs and those with higher biomass production show greater resistance to drought.

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“…Se observaron diferencias significativas en el factor Si y en la interacción Si × S, sobre la Fm en los horarios de 9:00 y 15:00 h (p˂ 0.05) (Cuadro 4). Adicionalmente la salinidad provocada por la adición de NaCl incrementó los valores de Fm reflejo en la reducción de 'cierre' de los centros de reacción del PSII (González et al, 2008), lo que a su vez implica una mayor activación de las reacciones fotoquímicas (Jiménez-Suancha et al, 2015). Lo anterior, refuerza la hipótesis de que el daño por salinidad presentado en los cultivos es resultado de la utilización del NaCl más que por una solución nutritiva balanceada (SNS).…”

Section: Fluorescencia Máxima (Fm)unclassified

Respuesta fisiológica diurna del tomate a la aplicación de silicio bajo condiciones de salinidad

Cuén

Mendoza²,

García³

et al. 2020

Remexca

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El silicio (Si) tiene efectos benéficos sobre la tolerancia de las plantas a diversos estreses bióticos y abióticos. El objetivo de este estudio fue determinar el efecto de la nutrición con Si en tomate cultivado bajo condiciones de estrés salino inducido (S), sobre la temperatura de las hojas, la fluorescencia de la clorofila y la conductancia estomática (gs). El experimento se realizó bajo condiciones de invernadero durante el ciclo primavera-verano de 2017. Se utilizó un diseño de parcelas divididas distribuidas al azar. En el cual la parcela principal fue la salinidad [con NaCl o con solución nutritiva estándar (SNS)] y la subparcela fue la aplicación de Si (0, 4, 8 g L-1). La medición de las variables se realizó durante el día. Los resultados mostraron que la temperatura de la hoja se incrementó al amanecer en plantas con NaCl y al atardecer el efecto se invirtió y los valores mayores fueron en plantas con SNS. Al medio día, se identificó interacción Si × S en las variables de eficiencia fotosintética (Fv/Fm) y fluorescencia mínima (Fo). La fluorescencia máxima (Fm) resultó más afectada por el tipo de salinidad, presentando los valores mayores plantas con SNS. Se concluyó que la respuesta fisiológica diurna de la planta de tomate cultivado bajo condiciones salinas dependerá del tipo de sal empleada y de la dosis de Si, sobretodo en horas tempranas y tardías del día.

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Fluorescencia como indicador de estrés en <i>Helianthus annuus</i> L. Una revisión

Cited by 18 publications

References 49 publications

Chlorophyll fluorescence and other physiological parameters as indicators of waterlogging and shadow stress in lulo (Solanum quitoense var. septentrionale) seedlings

Chlorophyll fluorescence and other physiological parameters as indicators of waterlogging and shadow stress in lulo (Solanum quitoense var. septentrionale) seedlings

Growth, biomass distribution, gas exchange and chlorophyll fluorescence in cowpea (Vigna unguiculata (L.) Walp.) under drought conditions

Respuesta fisiológica diurna del tomate a la aplicación de silicio bajo condiciones de salinidad

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