Water Stress Response of Conventional and Transgenic Soybean Plants Monitored by Chlorophyll a Fluorescence

Caires, Anderson R. L.; Scherer, Marisa D.; Santos, Teodoro Silva; Pontim, Bruno Cezar Álvaro; Gavassoni, Walber Luiz; Oliveira, S. L.

doi:10.1007/s10895-009-0594-4

Cited by 18 publications

(12 citation statements)

References 16 publications

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“…For these authors, electron transfer is a dominant process when one considers the differences in chlorophylls' oxidation potential. Nanoparticles of gold are capable of interfering in electron dissipation processes in PSII (Caires et al, 2010), similarly, aluminum nanoparticles are able to induce toxic effects related to interaction between the particles and the surface active sites on the cell wall (Sadiq et al, 2011) but these ANPs are infinitely larger compared with ions. Some stress responses are related to Al 3+ ions released from ANPs in the medium playing a predominant role on cytotoxicity (Pakrashi et al, 2013).…”

Section: Resultsmentioning

confidence: 99%

Chlorophyll a fluorescence in two varieties of sugar cane subjected to aluminum and water stress

Ecco¹,

Santiago²,

Lima³

2013

Afr. J. Agric. Res

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Soils of open pasture in the Cerrado (brazilian savanna) have farming limitations related to the high content of aluminum and water restrictions in the superficial horizons, due to easy drainage and large exposure to high levels of irradiance. Aiming to assess chlorophyll a fluorescence's responses in two varieties of sugar cane in the State of Mato Grosso do Sul subjected to water restriction and different aluminum contents, an experiment was conducted in a controlled environment. The experimental lineation consisted of random blocks in a factorial scheme (2 varieties x 2 levels of water available in the soil based on field capacity [cc] and 3 contents of Al +3 ), with 15 replications. Significant differences were observed throughout and at the end of the experiment between the averages of some parameters of chlorophyll a fluorescence for treatment EH1 and between varieties. Results obtained by means of the OJIP test were the most efficient for variety distinction. RB1 (RB 8555536) proved to be more responsive to treatments, variety RB2 (RB867515) did not present significant alterations between treatments; its suggests that most part of the radiation was efficiently used in the photochemical stage of photosynthesis, that makes it more tolerant to the subjected stresses.

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Section: Resultsmentioning

confidence: 99%

Chlorophyll a fluorescence in two varieties of sugar cane subjected to aluminum and water stress

Ecco¹,

Santiago²,

Lima³

2013

Afr. J. Agric. Res

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“…The chlorophyll a and total chlorophyll levels were altered, whereas chlorophyll b (accessory pigment) did not vary with Si addition. Photosynthetic pigments are highly responsible for photosynthetic metabolism in plants; chlorophyll a is the main agent responsible for allowing this interaction between the capture of solar energy and the process initiated within the chloroplasts, whereas chlorophyll b acts as an accessory pigment in the process of electron transfer to chlorophyll a (Caires et al, 2010;Bohr and Malik, 2011).…”

Section: Production Of Photosynthetic Pigmentsmentioning

confidence: 99%

Effects of Silicon on Alleviating Arsenic Toxicity in Maize Plants

Silva

Nascimento

Neto

et al. 2015

Rev. Bras. Ciênc. Solo

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Arsenic is a metalloid highly toxic to plants and animals, causing reduced plant growth and various health problems for humans and animals. Silicon, however, has excelled in alleviating stress caused by toxic elements in plants. The aim of this study was to investigate the effects of Si in alleviating As stress in maize plants grown in a nutrient solution and evaluate the potential of the spectral emission parameters and the red fluorescence (Fr) and far-red fluorescence (FFr) ratio obtained in analysis of chlorophyll fluorescence in determination of this interaction. An experiment was carried out in a nutrient solution containing a toxic rate of As (68 μmol L -1 ) and six increasing rates of Si (0, 0.25, 0.5, 1.0, 1.5, and 2.0 mmol L -1 ). Dry matter production and concentrations of As, Si, and photosynthetic pigments were then evaluated. Chlorophyll fluorescence was also measured throughout plant growth. Si has positive effects in alleviating As stress in maize plants, evidenced by the increase in photosynthetic pigments. Silicon application resulted in higher As levels in plant tissue; therefore, using Si for soil phytoremediation may be a promising choice. Chlorophyll fluorescence analysis proved to be a sensitive tool, and it can be successfully used in the study of the ameliorating effects of Si in plant protection, with the Fr/FFr ratio as the variable recommended for identification of temporal changes in plants.

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“…In fact, most environmental stresses are expected to slowly modify the chlorophyll concentration [6]. In a recent report, our group showed that the F 685 /F 735 can be used to detect water stress in soybean plants and to distinguish transgenic from conventional plants [28].…”

Section: In Vivo Analysismentioning

confidence: 99%

In vivo observation of chlorophyll fluorescence quenching induced by gold nanoparticles

Falco

Botero

Falcão

et al. 2011

Journal of Photochemistry and Photobiology A: Chemistry

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Water Stress Response of Conventional and Transgenic Soybean Plants Monitored by Chlorophyll a Fluorescence

Cited by 18 publications

References 16 publications

Chlorophyll a fluorescence in two varieties of sugar cane subjected to aluminum and water stress

Chlorophyll a fluorescence in two varieties of sugar cane subjected to aluminum and water stress

Effects of Silicon on Alleviating Arsenic Toxicity in Maize Plants

In vivo observation of chlorophyll fluorescence quenching induced by gold nanoparticles

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