Photosynthetic responses of lettuce to downy mildew infection and cytokinin treatment

Prokopová, Jitka; Špundová, Martina; Sedlářová, Michaela; Husičková, Alexandra; Novotný, Radko; Doležal, Karel; Nauš, Jan; Lebeda, A.

doi:10.1016/j.plaphy.2010.04.003

Cited by 44 publications

(28 citation statements)

References 33 publications

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“…However, all leaves investigated (6-8) from infected plants showed lower (30-60%) ˚P SII values from 10 DPI onwards than the corresponding controls, demonstrating a decrease in the photochemical efficiency of PMMoV-infected plants (significant at ˛ = 0.005). This decrease in ˚P SII is consistent with data obtained in other hostpathogen systems (Zou et al, 2005;Bonfig et al, 2006;Delaney, 2008;Rodríguez-Moreno et al, 2008;Prokopová et al, 2010).…”

Section: Chlorophyll Fluorescence Imagingsupporting

confidence: 91%

Tracking viral movement in plants by means of chlorophyll fluorescence imaging

Pineda

Olejníčková

Cséfalvay

et al. 2011

Journal of Plant Physiology

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Section: Chlorophyll Fluorescence Imagingsupporting

confidence: 91%

Tracking viral movement in plants by means of chlorophyll fluorescence imaging

Pineda

Olejníčková

Cséfalvay

et al. 2011

Journal of Plant Physiology

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“…It can be used for entire intact plants [21,22], detached leaves and also leaf disks punched out from infected plant material [23][24][25].…”

Section: Chlorophyll Fluorescence Imaging For Evaluation Of Fungal Inmentioning

confidence: 99%

“…Normally, CF transient measurements are evaluated by averaging the relevant parameters (e.g., F v /F m , NPQ, Φ PSII ) over the object under consideration [25,50,95]. To follow the course of Plasmopara viticola infection, [96] applied a complex pixel-wise analysis of CF images.…”

Section: Approaches To Analyse Chlorophyll Fluorescence and Spectral mentioning

confidence: 99%

Hyperspectral and Chlorophyll Fluorescence Imaging for Early Detection of Plant Diseases, with Special Reference to Fusarium spec. Infections on Wheat

2014

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Abstract:In recent years, market pressures have reinforced the demand to solve the problem of an increased occurrence of Fusarium head blight (FHB) in cereal production, especially in wheat. The symptoms of this disease are clearly detectable by means of image analysis. This technique can therefore be used to map occurrence and extent of Fusarium infections. From this perspective, a separate harvest in the field can be taken into consideration. Based on the application of chlorophyll fluorescence and hyperspectral imaging, characteristics, requirements and limitations of Fusarium detection on wheat, both in the field and in the laboratory, are discussed. While the modification of spectral signatures due to fungal infection allows its detection by hyperspectral imaging, the decreased physiological activity of tissues resulting from Fusarium impacts provides the base for CFI analyses. In addition, the two methods are compared in view of their usability for the detection of Fusarium, and different approaches for data analysis are presented.

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“…During stress conditions, CK plays a role in the maintenance of the structure and function of the photosynthetic apparatus in a diverse and complex manner which is yet to be fully understood. Even though there is no direct evidence that INCYDE influences the photosynthetic apparatus, the role of CKs on several photosynthetic parameters is well documented (Chernyad'ev 2009;Prokopová et al 2010;Aremu et al 2012b). Thus, it can be inferred that INCYDE action is related to its ability to regulate the concentration of endogenous CK in planta.…”

Section: Effect Of Incyde On Photosynthetic Pigment Contents and Chlomentioning

confidence: 99%

A novel inhibitor of cytokinin degradation (INCYDE) influences the biochemical parameters and photosynthetic apparatus in NaCl-stressed tomato plants

Aremu

Sunmonu

Kulkarni

et al. 2014

Planta

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The effect of 2-chloro-6-(3-methoxyphenyl)aminopurine [inhibitor of cytokinin degradation (INCYDE)] at 10 nM on growth, biochemical and photosynthetic efficiency in sodium chloride (NaCl)-stressed (75, 100 and 150 mM) tomato plants was investigated. NaCl-induced decline in plant vigor index was slightly reversed by both drenching and foliar application of INCYDE. Foliar application of INCYDE significantly increased the flower number in the control and 75 mM NaCl-supplemented plants, while drenching was more effective in 150 mM NaCl-stressed plants. Antioxidant enzymes (peroxidase, catalase and superoxide dismutase) were enhanced in the presence of INCYDE in the control and NaCl-stressed plants. Higher concentration of malondialdehyde (MDA) associated with oxidative (lipid peroxidation) damage in leaf tissue which was evident in the presence of NaCl stress was significantly attenuated with the drenching and foliar application of INCYDE. Regardless of NaCl concentration, application of INCYDE had no significant influence on maximum quantum efficiency of photosystem II. However, the reduced quantum yield of photosystem II and coefficient of photochemical quenching under continuous illumination with actinic light at four intensities (264, 488, 800 and 1,200 µmol m(-2) s(-1)) in NaCl-stressed (100 and 150 mM) tomato plants were significantly alleviated by drenching application with INCYDE. Non-photochemical quenching of the singlet excited state of chlorophyll a and relative electron transfer rate were generally higher in INCYDE-treated plants than in the controls. From an agricultural perspective, these findings indicate the potential of INCYDE in protecting plants against NaCl stress and the possibility of enhanced productivity.

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Photosynthetic responses of lettuce to downy mildew infection and cytokinin treatment

Cited by 44 publications

References 33 publications

Tracking viral movement in plants by means of chlorophyll fluorescence imaging

Tracking viral movement in plants by means of chlorophyll fluorescence imaging

Hyperspectral and Chlorophyll Fluorescence Imaging for Early Detection of Plant Diseases, with Special Reference to Fusarium spec. Infections on Wheat

A novel inhibitor of cytokinin degradation (INCYDE) influences the biochemical parameters and photosynthetic apparatus in NaCl-stressed tomato plants

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