Impairment of the photosynthetic apparatus by oxidative stress induced by photosensitization reaction of protoporphyrin IX

Tripathy, Baishnab C.; Mohapatra, Anasuya; Gupta, Illora

doi:10.1016/j.bbabio.2007.03.008

Cited by 47 publications

(36 citation statements)

References 44 publications

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“…Therefore, our results show that the most relevant ROS, which is produced in the chlorophyll-containing lipid membranes of leaf tissue exposed to light, is 1 O 2 both under basal and stress conditions. 1 O 2 oxidizes cellular components, such as nucleic bases (Ravanat et al, 2000), proteins (Davies, 2003), and membranes and this characteristic is exploited in photodynamic therapies to kill cancer cells (Girotti and Kriska, 2004), bacteria (Maisch et al, 2007), and also to conceive herbicides (Fufezan et al, 2002;Tripathy et al, 2007). We have observed that 1 O 2 -mediated LPO precedes cell death in our 1 O 2 -overproducing mutants vte1 npq1 and ch1.…”

Section: Discussionmentioning

confidence: 52%

Singlet Oxygen Is the Major Reactive Oxygen Species Involved in Photooxidative Damage to Plants

Triantaphylidès¹,

Krischke²,

Hoeberichts³

et al. 2008

Plant Physiology

507

358

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Reactive oxygen species act as signaling molecules but can also directly provoke cellular damage by rapidly oxidizing cellular components, including lipids. We developed a high-performance liquid chromatography-electrospray ionization-tandem mass spectrometry-based quantitative method that allowed us to discriminate between free radical (type I)-and singlet oxygen ( 1 O 2 ; type II)-mediated lipid peroxidation (LPO) signatures by using hydroxy fatty acids as specific reporters. Using this method, we observed that in nonphotosynthesizing Arabidopsis (Arabidopsis thaliana) tissues, nonenzymatic LPO was almost exclusively catalyzed by free radicals both under normal and oxidative stress conditions. However, in leaf tissues under optimal growth conditions, 1 O 2 was responsible for more than 80% of the nonenzymatic LPO. In Arabidopsis mutants favoring 1 O 2 production, photooxidative stress led to a dramatic increase of 1 O 2 (type II) LPO that preceded cell death. Furthermore, under all conditions and in mutants that favor the production of superoxide and hydrogen peroxide (two sources for type I LPO reactions), plant cell death was nevertheless always preceded by an increase in 1 O 2 -dependent (type II) LPO. Thus, besides triggering a genetic cell death program, as demonstrated previously with the Arabidopsis fluorescent mutant, 1 O 2 plays a major destructive role during the execution of reactive oxygen species-induced cell death in leaf tissues.Plant leaves capture sun-derived light energy to drive CO 2 fixation during photosynthesis. During this process, leaves need to cope with photooxidative stress when the balance between energy absorption and consumption is disturbed. Excess excitation energy in the photosystems (PSI and PSII) leads to the inhibition of photosynthesis via the production of various reactive oxygen species (ROS) at different spatial levels of the cell (Apel and Hirt, 2004;Asada, 2006;Van Breusegem and Dat, 2006). Both exposure to high light intensities and decreased CO 2 availability direct linear electron transfer toward the reduction of molecular oxygen, generating superoxide radicals (O 2 2. ) at PSI (the Mehler reaction). Superoxide dismutation generates hydrogen peroxide (H 2 O 2 ), which is detoxified in the chloroplast by ascorbate peroxidases. As such, this so-called water-water cycle participates in the dissipation of excess energy (Asada, 2006). Decreased CO 2 availability affects the first step in CO 2 fixation by shifting the carboxylation of Rubisco by the Rubisco carboxylase-oxygenase enzyme toward oxygenation, a process called photorespiration. This leads, through the action of glycolate oxidase, to peroxisomal H 2 O 2 production that is counteracted by catalases. Finally, when the intersystem electron carriers are overreduced, triplet excited P680 in the PSII reaction center as well as triplet chlorophylls in the light-harvesting antennae are produced, with the production of singlet oxygen ( 1 O 2 ) as a consequence (Krieger-Liszkay, 2005). In photosynthetic membranes, 1 O 2 ...

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Section: Discussionmentioning

confidence: 52%

Singlet Oxygen Is the Major Reactive Oxygen Species Involved in Photooxidative Damage to Plants

Triantaphylidès¹,

Krischke²,

Hoeberichts³

et al. 2008

Plant Physiology

507

358

View full text Add to dashboard Cite

show abstract

“…This consequence may be attributed to the fact that damages in the photosynthetic system reflect on the reduction of the levels of chlorophyll and carotenoids (Santos et al, 2011). As the oxidative stress increases in function of time of exposure to the light, the thylakoids are damaged and lose their capacity to do photosynthesis due to damage in the photosynthetic apparatus (Tripathy et al, 2007), which can explain the smaller liquid photosynthesis observed in plants treated with carfentrazone-ethyl.…”

Section: Resultsmentioning

confidence: 99%

Biochemical and Physiological Changes in Rice Plants Due to the Application of Herbicides1

et al. 2016

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-The application of herbicides, even if selective, can cause biochemical and physiological changes, resulting in oxidative stress. This stress comes from the accumulation of reactive oxygen species produced due to exposure to the herbicide. However, plants have developed defense strategies, which can be enzymatic or non-enzymatic. The objective of this study was to evaluate the morphological and metabolic changes such as photosynthetic parameters, oxidative damage and antioxidant enzyme activity of rice plants after applying herbicides. For this, a study was conducted in a greenhouse and laboratory and the treatments consisted of application of imazapic + imazapyr, quinclorac, bentazon, cyhalofop-butyl, penoxsulan, bispyribac-sodium and carfentrazone-ethyl, in addition to control without herbicide. The phytotoxicity in plants was strong and there was a reduction in photosynthesis, stomatal conductance and efficiency of water use in plants treated with carfentrazone-ethyl. Furthermore, the application of carfentrazone-ethyl resulted in lower chlorophylls and carotenoids and increased lipid peroxidation and proline accumulation. Changes in the activity of enzymes belonging to the antioxidant system were inspected by applying herbicides. The application of herbicide alters the physiology of rice plants, triggering responses to oxidative stress, which are more pronounced when used carfentrazone-ethyl. Keywords:Oryza sativa, oxidative stress, lipid peroxidation, selectivity. RESUMO -

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“…Among responses that plants have against these stresses include increased membrane peroxidation, which affects the structure and function of the photosynthetic apparatus, inactivating the reaction centers of the photosystems (Tripathy et al, 2007).…”

Section: Introductionmentioning

confidence: 99%

Change in Physiological Features in Ryegrass Biotypes in Competition With Soybean Due Resistance to Glyphosate

et al. 2016

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-Herbicide resistance can cause biochemical, physiological, morphological and phenological changes in weeds, altering their competitive ability against crops. The aim of the study was to assess physiological changes and cellular damage in susceptible and resistant biotypes of ryegrass and soybeans under competition. Three experiments were conducted in a greenhouse using a completely randomized design with four replications performed in a replacement series. The ratios of soybean and to susceptible (experiment 1) and resistant ryegrass (experiment 2) and of susceptible to resistant (experiment 3) ryegrass were 100:0, 75:25, 50:50, 25:75 and 0:100. Forty days after the emergence of the soybean crop and 60 days after the emergence of the ryegrass plants, the leaves of the competing plants were collected. The following variables were assessed: the levels of carotenoids, chlorophylls and total phenolic compounds; amount of hydrogen peroxide; degrees of lipid peroxidation and electrolyte leakage; and activity of enzymes catalase, superoxide dismutase and ascorbate peroxidase. The production of phenols and increased oxidative damage due to interspecies competition with ryegrass was, in general, observed in the soybeans; the ryegrass biotypes, susceptible and resistant to glyphosate, coexisting with soybean have generally higher oxidative damage due to intraspecific competition; since when these biotypes coexist not present modifications of these parameters.Keywords: oxidative stress, antioxidant enzymes, adaptability of herbicide resistant plants. RESUMO -A resistência aos herbicidas pode causar mudanças bioquímicas,fisiológicas, morfológicas ou fenológicas nas plantas daninhas alterando a capacidade competitiva com as culturas.O objetivo do estudo foi verificar alterações na fisiologia e os danos celulares em biótipos de azevém resistente

show abstract

Impairment of the photosynthetic apparatus by oxidative stress induced by photosensitization reaction of protoporphyrin IX

Cited by 47 publications

References 44 publications

Singlet Oxygen Is the Major Reactive Oxygen Species Involved in Photooxidative Damage to Plants

Singlet Oxygen Is the Major Reactive Oxygen Species Involved in Photooxidative Damage to Plants

Biochemical and Physiological Changes in Rice Plants Due to the Application of Herbicides1

Change in Physiological Features in Ryegrass Biotypes in Competition With Soybean Due Resistance to Glyphosate

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