Photoinhibition of photosystems I and II induced by exposure to high light intensity during oat plant growth

Quiles, Marı́a José; López, Natalia Irene

doi:10.1016/j.plantsci.2003.11.025

Cited by 77 publications

(46 citation statements)

References 35 publications

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“…(Mittler 2002). These species of oxygen are highly cytotoxic and can seriously react with vital biomolecules such as lipids, proteins, nucleic acids, and other macromolecules causing lipid peroxidation, protein denaturation and DNA mutation (Quiles & López 2004). The membranes are considered the first place of abiotic stress responses, which lead to cell and organelle injuries (Candan & Tarhan 2003).…”

Section: Introductionmentioning

confidence: 99%

Molybdenum application enhances antioxidant enzyme activity and COR15a protein expression under cold stress in wheat

Al-Issawi

Rihan

Al-Shmgani

et al. 2016

Journal of Plant Interactions

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Under cold stress, reactive oxygen species (ROS) are considered the main source of damage to plant cells. Mechanisms of ROS scavenging in wheat are very important during stress and the antioxidant enzymes superoxide dismutase, Catalase and Glutathione peroxidase are key to facilitating ROS scavenging. Molybdenum (Mo) is involved in many plant physiological and biochemical processes including antioxidant enzymes. This study reports research to investigate the effect of Mo application in enhancing antioxidant enzymes in two wheat cultivars. The results confirmed that antioxidant defense is important in wheat that is exposed to abiotic stress and that changes in activities of antioxidant enzymes occurred during exposure of plants to low non-freezing temperatures and by adding Mo. Mo application had a positive effect on gene expression of both Cbf14 and COR15a protein expression, indicating upregulation of the stress response regulon. In addition, Mo enhanced antioxidant enzymes activity and improved frost tolerance. ARTICLE HISTORY

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Section: Introductionmentioning

confidence: 99%

Molybdenum application enhances antioxidant enzyme activity and COR15a protein expression under cold stress in wheat

Al-Issawi

Rihan

Al-Shmgani

et al. 2016

Journal of Plant Interactions

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“…Photoinhibition is defined as the inhibition of photosynthesis due to excess light. When leaves are exposed to more light than they are able to use, the excess light energy absorbed can direct produce species reactive to oxygen and provoke damage in the photosynthetic mechanism (Quiles & López, 2004). A plant's PS II quantum efficiency can also be reduced by photoinhibition when exposed to excess light energy (Krause & Weis, 1991) -the net result of the whole complex of cellular interactions and leaf level processes (Demmig-Adams & Adams, 1992;Björkman & Demmig-Adams, 1994).…”

Section: Resultsmentioning

confidence: 99%

Physiological and anatomical characteristics of leaves of two clones of guarana

Gonçalves

Júnior

Silva

et al. 2006

Pesq. agropec. bras.

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-The objective of this work was to analyze gas exchange, photosynthetic characteristics, photochemical efficiency of photosystem II and anatomical characteristics of young plant leaves of two guarana (Paullinia cupana) clones (BRS-CG372RC and BRS-CG611RL) growing under open field. The variables of gas exchange and fluorescence of chlorophyll a were evaluated in mature leaves. The values of photosynthesis and transpiration found for BRS-CG372RC were 27% greater and 80% lesser than values found for BRS-CG611RL, respectively. The values of stomatal conductance found for the clones BRS-CG372RC and BRS-CG611RL were in the order of 224 and 614 mmol mm -2 s -1, respectively. The values of photorespiration, rate of carboxylation and rate electron transport were greater in BRS-CG372RC. The clone BRS-CG372RC exhibited stomatal density 26% greater than BRS-CG611RL. However, the area of ostiolar opening was 42% greater in BRS-CG611RL. The values of the water use efficiency in BRS-CG372RC were 134% greater than in BRS-CG611RL. High stomatal density and low stomatal conductance can be important characteristics in the selection of the clones with a good ability to assimilate carbon and optimize the use of water.Index terms: Paullinia cupana, photosynthesis, photochemical efficiency of photosystem II, electron transport rate, water use efficiency, stomatal anatomy. Características fisiológicas e anatômicas de folhas de dois clones de guaranáResumo -O objetivo deste trabalho foi analisar as trocas gasosas, as características fotossintéticas, a eficiência fotoquímica do fotossistema II e as características anatômicas foliares de plantas jovens de dois clones de guaraná desenvolvidas a pleno sol. As variáveis de trocas gasosas e fluorescência da clorofila a foram determinadas em folhas maduras. Os valores de fotossíntese e transpiração encontrados para BRS-CG372RC foram 27% maiores e 80% menores que os valores encontrados para BRS-CG611RL, respectivamente. Os valores de condutância estomática dos clones BRS-CG372RC e BRS-CG611RL foram de aproximadamente 224 e 614 mmol m -2 s -1, respectivamente. Os valores de fotorrespiração, taxa de carboxilação e taxa de transporte de elétrons foram maiores em BRS-CG372RC. O clone BRS-CG372RC apresentou densidade estomática 26% maior que BRS-CG611RL. A área de abertura do ostíolo foi 42% maior em BRS-CG611RL. O valor da eficiência no uso da água em BRS-CG372RC foi 134% maior que em BRS-CG611RL. Alta densidade estomática e baixa condutância estomática são características importantes para a seleção de clones com boa capacidade para assimilar carbono e que sejam eficientes no uso da água.Termos para indexação: Paullinia cupana, fotossíntese, eficiência fotoquímica do fotossistema II, taxa de transporte de elétrons, eficiência no uso da água, anatomia de estômatos.

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“…This technique permits us to compare, by means of imagines, the variation in these processes and to study any damage caused in the same leaf as time progresses. Usually, changes in F v /F m of leaves adapted to dark, which represents the maximal quantum yield of PS II (Krause & Weis, 1991), are used as an indicator of the functional state of the photosynthetic apparatus (Barbagallo et al, 2003;Krause & Jahns, 2004;Oxborough, 2004b), since this parameter, which has a value of between 0.70 and 0.85 in unstressed leaves, falls under the influence of adverse factors (Ehlert & Hincha, 2008;Havaux & Lannoye, 1985;Joshi & Mohantly, 2004;Quiles & López, 2004;Teicher et al, 2000). Sun plants (C. morifolium) and shade plants (S. wallisii) were exposed to photoperiods with low watering, high illumination and heat.…”

Section: Discussionmentioning

confidence: 99%

“…However, not all fluorescence parameters are suitable for the early detection of plant stress. Usually, changes in the maximum quantum yield of PS II are used as an indicator of the functional state of the photosynthetic apparatus (Barbagallo et al, 2003;Oxborough, 2004b), since this parameter, which has a value between 0.70 and 0.85 in unstressed leaves, falls under the influence of adverse factors (Ehlert & Hincha, 2008;Havaux & Lannoye, 1985;Joshi & Mohantly, 2004;Quiles & López, 2004;Teicher et al, 2000). However, in the present paper we show that in both sun (Chrysanthemum morifolium) and shade (Spathiphyllum wallisii) plants exposed to drought, high illumination and heat and showing no visible damage, the images of the maximal quantum yield of PS II (F v /F m ) in dark-adapted leaves vary little from those in control plants, and, in all cases, the values are quite normal (above 0.74).…”

mentioning

confidence: 99%

Using Chlorophyll Fluorescence Imaging for Early Assessment of Photosynthesis Tolerance to Drought, Heat and High Illumination

Quiles¹,

Ibáñez²,

Muñoz³

2012

Artificial Photosynthesis

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Photoinhibition of photosystems I and II induced by exposure to high light intensity during oat plant growth

Cited by 77 publications

References 35 publications

Molybdenum application enhances antioxidant enzyme activity and COR15a protein expression under cold stress in wheat

Molybdenum application enhances antioxidant enzyme activity and COR15a protein expression under cold stress in wheat

Physiological and anatomical characteristics of leaves of two clones of guarana

Using Chlorophyll Fluorescence Imaging for Early Assessment of Photosynthesis Tolerance to Drought, Heat and High Illumination

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