Photodynamic herbicides. Recent developments and molecular basis of selectivity

Rebeiz, Constantin A.; Montazer-Zouhoor, A.; Mayasich, Joseph M.; Tripathy, Baishnab C.; Wu, Shaowen; Rebeiz, Carole C.; Friedmann, Herbert

doi:10.1080/07352688809382256

Cited by 98 publications

(54 citation statements)

References 42 publications

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“…43,44 However, when ALA is applied externally, green plants bypass the regulatory feedback inhibition of Pchlide pool and induce excess accumulation of Mg-tetrapyrroles in the dark. 31,32,45 When only ALA is applied externally, Pchlide is the major porphyrin that accumulates. But after ALA + Modulator (= a compound structurally related to tetrapyrrole molecule) treatments, several other types of porphyrins accumulate, depending upon the target site of the modulator.…”

Section: Porphyrin-generating Compoundsmentioning

confidence: 99%

Reactive oxygen species generation and signaling in plants

Tripathy

Oelmüller²

2012

Plant Signaling & Behavior

586

304

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Section: Porphyrin-generating Compoundsmentioning

confidence: 99%

Reactive oxygen species generation and signaling in plants

Tripathy

Oelmüller²

2012

Plant Signaling & Behavior

586

304

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“…However, the use of porphyrins for this purpose was only mentioned from the late 1980s of the last century [118][119][120][121]. Since then, the use of natural or synthetic porphyrin derivatives has been increasingly exploited to control and eradicate various types of insects, including pest flies capable of inducing significant damage to agricultural crops, and mosquitoes vectors of pathogens responsible for malaria (Anopheles), yellow fever (Culex, Aedes) dengue fever (Aedes) and encephalitis (Aedes, Culex, Anopheles) [46][47][48]50,[66][67][68].…”

Section: Insect Pest Eliminationmentioning

confidence: 99%

Potential applications of porphyrins in photodynamic inactivation beyond the medical scope

Alves

Faustino

Neves

et al. 2015

Journal of Photochemistry and Photobiology C: Photochemistry Re

195

128

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a b s t r a c tAlthough the discovery of light-activated antimicrobial agents had been reported in the 1900s, only more recently research work has been developed toward the use of photodynamic process as an alternative to more conventional methods of inactivation of micro(organisms). The photoprocess causes cell death through irreversible oxidative damage by reactive oxygen species produced by the interaction between a photosensitizing compound and a light source.With great emphasis on the environmental area, photodynamic inactivation (PDI) has been tested in insect eradication and in water disinfection. Lately, other studies have been carried out concerning its possible use in aquaculture waters or to the control of food-borne pathogens. Other potential applications of PDI in household, industrial and hospital settings have been considered.In the last decade, scientific research in this area has gained importance not only due to great developments in the field of materials chemistry but also because of the serious problem of the increasing number of bacterial species resistant to common antibiotics. In fact, the design of antimicrobial surfaces or selfcleaning materials is a very appealing idea from the economic, social and public health standpoints. Thus, PDI of micro(organisms) represents a promising alternative.In this review, the efforts made in the last decade in the investigation of PDI of (micro)organisms with potential applications beyond the medical field will be discussed, focusing on porphyrins, free or immobilized on solid supports, as photosensitizing agents.

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“…It is well known that plants treated with ALA accumulate Mg-tetrapyrroles in the dark. Upon exposure ofALA-treated plants to sunlight, these excess tetrapyrroles are photosensitized and consequent photodynamic reactions kill the plants within a few hours (3,(18)(19)(20). Photodynamic damage to plants is accompanied by destruction of photosynthetic reactions, and this damage appears to be irreversible (20).…”

mentioning

confidence: 99%

“…'02 is produced due to the type II photosensitization reaction of porphyrins (1 1). It was proposed that '02 could be involved in porphyrin-sensitized photodynamic damage of ALA-treated plants (3,(18)(19)(20) difficult to demonstrate the production of '02 in intact plants.…”

mentioning

confidence: 99%

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Involvement of Singlet Oxygen in 5-Aminolevulinic Acid-Induced Photodynamic Damage of Cucumber (Cucumis sativus L.) Chloroplasts

Chakraborty¹,

Tripathy²

1992

Plant Physiol.

132

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Cucumber (Cucumis sativus L., cv Poinsette) plants were sprayed with 20 millimolar 5-aminolevulinic acid and then incubated in the dark for 14 hours. The intact chloroplasts were isolated from the above plants in the dark and were exposed to weak light (250 micromoles per square meter per second). Within 30 minutes, photosystem 11 activity was reduced by 50%. The singlet oxygen (102) scavengers, histidine and sodium azide (NaN3) significantly protected against the damage caused to photosystem II. The hydroxyl radical scavenger formate failed to protect the thylakoid membranes. The production of 102 monitored as N,N-dimethyl p-nitrosoaniline bleaching increased as a function of light exposure time of treated chloroplasts and was abolished by the 102 quencher, NaN3. Membrane lipid peroxidation monitored as malondialdehyde production was also significantly reduced when chloroplasts were illuminated in the presence of NaN3 and histidine. Protochlorophyllide was the most abundant pigment accumulated in intact chloroplasts isolated from 5-aminolevulinic acid-treated plants and was probably acting as type 11 photosensitizer.

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Photodynamic herbicides. Recent developments and molecular basis of selectivity

Cited by 98 publications

References 42 publications

Reactive oxygen species generation and signaling in plants

Reactive oxygen species generation and signaling in plants

Potential applications of porphyrins in photodynamic inactivation beyond the medical scope

Involvement of Singlet Oxygen in 5-Aminolevulinic Acid-Induced Photodynamic Damage of Cucumber (Cucumis sativus L.) Chloroplasts

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