In vivo observation of chlorophyll fluorescence quenching induced by gold nanoparticles

Falco, William F.; Botero, Ériton Rodrigo; Falcão, E. A.; Santiago, Etenaldo Felipe; Bagnato, Vanderlei Salvador; Caires, Anderson R. L.

doi:10.1016/j.jphotochem.2011.09.027

Cited by 88 publications

(33 citation statements)

References 27 publications

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“…One of the earliest investigations of the possible interactions between NPs and photosynthesis demonstrated that QDs act as artificial light-harvesting antennae which transfer energy to reaction centres [70]. This has been approached using silver and gold NPs, demonstrating that if the plasmon resonance is chosen correctly it will quench chlorophyll fluorescence [71,72]; furthermore, titanium oxide NPs have been shown to enhance energy transfer away from PSII, which may increase the energy conversion efficiency for PSII, thus allowing increased light absorption [73]. None of these approaches has yet been demonstrated to enhance crop yields.…”

Section: Established Nanomaterials -Photosynthetic Interactionsmentioning

confidence: 99%

Functional nanomaterials to augment photosynthesis: evidence and considerations for their responsible use in agricultural applications

et al. 2018

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At the current population growth rate, we will soon be unable to meet increasing food demands. As a consequence of this potential problem, considerable efforts have been made to enhance crop productivity by breeding, genetics and improving agricultural practices. While these techniques have traditionally been successful, their efficacy since the ‘green revolution’ has begun to significantly plateau. This stagnation of gains combined with the negative effects of climate change on crop yields has prompted researchers to develop novel and radical methods to increase crop productivity. Recent work has begun exploring the use of nanomaterials as synthetic probes to augment how plants use light. Photosynthesis in crops is often limited by their ability to absorb and exploit solar energy for photochemistry. The capacity to interact with and optimize how plants use light has the potential to increase the productivity of crops and enable the tailoring of crops for different environments and to compensate for predicted climate changes. Advances in the synthesis and surface modification of nanomaterials have overcome previous drawbacks and renewed their potential use as synthetic probes to enhance crop yields. Here, we review the current applications of functional nanomaterials in plants and will make an argument for the continued development of promising new nanomaterials and future applications in agriculture. This will highlight that functional nanomaterials have the clear potential to provide a much-needed route to enhanced future food security. In addition, we will discuss the often-ignored current evidence of nanoparticles present in the environment as well as inform and encourage caution on the regulation of nanomaterials in agriculture.

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Section: Established Nanomaterials -Photosynthetic Interactionsmentioning

confidence: 99%

Functional nanomaterials to augment photosynthesis: evidence and considerations for their responsible use in agricultural applications

et al. 2018

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“…The literature reports chlorophyll fluorescence as a physiological parameter efficient at the identification of absence or presence of damages in the photosynthetic process, notably in plants exposed to environmental stresses (Falco et al, 2011).…”

Section: Introductionmentioning

confidence: 99%

Quantum efficiency of photosystem II and production of orange under salt stress and nitrogen fertilization

Sousa

Gheyi

Brito

et al. 2016

Rev. bras. eng. agríc. ambient.

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A B S T R A C TThis study aimed to evaluate the salt tolerance of 'Mimo do Céu' orange grafted onto three rootstocks using physiological parameters such as maximum quantum efficiency of photosystem II (PSII) and the production of fruits. It also evaluated the effectiveness of increased nitrogen (N) fertilization in reducing the effects of salt stress. Two concomitant experiments were carried out under controlled conditions, using drainage lysimeters. The Experiment I evaluated the effects of the application of five levels of saline water on three combinations of scion-rootstocks grafted with 'Mimo de Ceu' orange, in a randomized block design with three replicates in a 5 x 3 factorial scheme. The Experiment II evaluated the application of two N levels (100 and 200% of recommendation) in three scion-rootstock combinations irrigated with water of electrical conductivity of 3.0 dS m -1 , in a 3 x 2 factorial scheme, with three replicates. The maximum quantum efficiency of PSII was inhibited in citrus plants under salt stress. 'Mimo do Ceu' orange grafted onto 'Common' Rangpur lime has higher yield potential. The increase in N dose did not reduce the deleterious effects of water salinity on fruit production.Eficiência quântica do fotossistema II e produção de laranjeira sob estresse salino e adubação nitrogenada R E S U M O Objetivou-se, com este trabalho, avaliar a tolerância ao estresse salino da laranjeira 'Mimo do Céu' enxertada em três porta-enxertos utilizando como parâmetros fisiológicos, a eficiência quântica do fotossistema II e a produção de frutos. Também se avaliou a eficiência máxima do incremento da adubação nitrogenada na redução dos efeitos do estresse salino; para tanto foram realizados dois experimentos concomitantes em condições controladas e com auxílio de lisímetros de drenagem. No Experimento I foram estudados em blocos casualizados com três repetições, em esquema fatorial 5 x 3, cinco níveis de salinidade da água e três combinações de copa/porta-enxerto e no Experimento II estudou-se a aplicação de duas doses de N (100 e 200% da recomendação) em plantas das três combinações de copa/porta-enxerto irrigadas com águas de condutividade elétrica de 3,0 dS m -1 , em esquema fatorial 3 x 2 com três repetições. A eficiência máxima quântica do PSII foi inibida nas plantas cítricas com estresse salino; já o aumento do teor salino da água de irrigação reduz a produção de frutos e a laranjeira 'Mimo do Céu' enxertada no Limoeiro Cravo 'Comum' possui maior potencial produtivo. O aumento na fertilização nitrogenada não reduziu os efeitos da salinidade sobre a produção total de frutos.

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“…to biomagnifications [21]. The results of experiments of Falco et al [22] suggested that gold nanoparticles were able to translocation and accumulation in the soybean plants after seed inoculation. In vivo observation of chlorophyll a fluorescence quenching may be induced by gold nanoparticle.…”

Section: Discussionmentioning

confidence: 99%

Fluorescence Emission Spectrum of Elodea Leaves Exposed to Nanoparticles

Maharramov¹,

Ahmadov²,

Рамазанов³

et al. 2015

JBNB

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In vivo observation of chlorophyll fluorescence quenching induced by gold nanoparticles

Cited by 88 publications

References 27 publications

Functional nanomaterials to augment photosynthesis: evidence and considerations for their responsible use in agricultural applications

Functional nanomaterials to augment photosynthesis: evidence and considerations for their responsible use in agricultural applications

Quantum efficiency of photosystem II and production of orange under salt stress and nitrogen fertilization

Fluorescence Emission Spectrum of Elodea Leaves Exposed to Nanoparticles

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