Physiological, Biochemical and Molecular Effects of Sulfur Dioxide

Okpodu, Camellia Moses; Alscher, Ruth G.; Grabau, Elizabeth A.; Cramer, Carole L.

doi:10.1016/s0176-1617(96)80258-6

Cited by 34 publications

(23 citation statements)

References 42 publications

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“…a, b Plants grew at 100 and 12% light intensity, respectively; (1, 3, 5) leaf sections before NaHSO 3 treatment (control); (2, 4, 6) leaf sections treated by 50 mM NaHSO 3 solution for 10 h SO 2 , acts as a stress factor, has been reported to influence firstly on chloroplast (González et al 1993). The physiological and biochemical mechanisms of SO 2 and its aqueous product HSO 3 -on the modification of chloroplast were proposed mainly by reactive oxygen species (AOS) produced through the oxidation pathway (Okpodu et al 1996;Lin et al 2007). Species abilities to respond to their environmental light conditions and stress factor correlated with their habitat and successional status (Strauss-Debenedetti and Bazzaz 1991).…”

Section: Discussionmentioning

confidence: 99%

“…In the presence of oxygen, a series of SO x -and oxygen radicals are generated which induce lipid peroxidation and numerous connected reactions (Schempp et al 2005). From former studies, chloroplast is one of the main targets of SO 2 or its degradation products generated in aqueous solutions, resulting in an impairment of chloroplast functionality through a loss of net CO 2 assimilation, a decline in the photosynthetic electron transport rate, and inhibition of dark reactions of photosynthesis (Lütz et al 1992;Okpodu et al 1996). Most of the functional changes in cellular organelle can be interpreted by the alterations in ultrastructures of chloroplast and thylakoid.…”

Section: Introductionmentioning

confidence: 99%

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Light acclimation and HSO3 − damage on photosynthetic apparatus of three subtropical forest species

et al. 2009

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The effects of long-term (33 months) sun/shade acclimation and short-term (within 10 h) HSO(3) (-) treatment on leaf photosynthetic apparatus were investigated in three subtropical forest plants, Pinus massoniana, Schima superba, and Acmena acuminatissima. After 33 months' growth in two light environments (100 and 12% sunlight), rapid light curves (RLC), chlorophyll fluorescence imaging and chloroplast ultrastructures of three tested species were changed to different degrees. When leaf sections were immersed in 50 mM NaHSO(3) for 10 h, all the RLCs were lowered; chlorophyll fluorescence imaging was inclined to present warmer colors and imaging areas were decreased. However, changes in chloroplast ultrastructures differed from three species. Our results showed that the photosynthetic apparatus of a dominant species, A. acuminatissima, in the late succession stage of a subtropical forest in South China, was less sensitive to NaHSO(3) under both growing light intensities. Conversely, the chloroplasts of P. massoniana, the pioneer heliophyte species, were most susceptible to NaHSO(3). It is deduced that, SO(2) pollution may become as a factor to accelerate the succession of subtropical forest.

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Section: Discussionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Light acclimation and HSO3 − damage on photosynthetic apparatus of three subtropical forest species

et al. 2009

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“…Changing environmental conditions such as vicissitudes of temperature, humidity, water availability, salt stress, or light intensity can lead to increased production of ROS within the chloroplast. Damage of leaves due to air pollutants such as sulfur dioxide and ozone or photodynamic herbicides such as paraquat is also mediated through the production of ROS (Mehlhorn et al 1990;Foyer and Mullineaux 1994;Okpodu et al 1996). The site of action of sulfur dioxide, photodynamic herbicides, and high light is the chloroplast, whereas ozone and most pathogens act in the extracellular space.…”

Section: Redox Sensing and Photosynthetic Functionmentioning

confidence: 99%

Oxidative Stress and Acclimation Mechanisms in Plants

Grene

2002

The Arabidopsis Book

116

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“…, E. KUZ, NIAK & H. URBANEK 1998, Elstner, 1991, Hern~indez et al, 1999, Dai et al, 1997, Scandalios, 1993, Prasad et al, 1994, Kn6rzer et al, 1996, Hippeli and Elstner, 1996, Okpodu et al, 1996, Orozco-Cardenas and Ryan, 1999. Due to common involvement of ROS in abiotic stresses several antioxidative enzymes directly eliminating harmful ROS were genetically engineered into plants to enhance their oxidative stress tolerance.…”

Section: The Role Of H202 In Plant Response To Biotic Stressmentioning

confidence: 99%

The involvement of hydrogen peroxide in plant responses to stresses

2000

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The role of reactive oxygen species, especially H202, in plant response to stresses has been the focus of much attention. Hydrogen peroxide has been postulated to play multiple functions in plant defence against pathogens. (1) H202 may possess direct microbicidal activity at the sites of pathogen invasion. (2) It is used for cell-wall reinforcing processes: lignification and oxidative cross-linking of hydroxyproline-rich proteins and other cell-wall polymers. (3) It was found to be necessary for phytoalexin synthesis. (4) H202 may trigger programmed plant cell death during the hypersensitive response that restricts the spread of infection. (5) H202 has been suggested to act as a signal in the induction of systemic acquired resistance and (6) it induces defence genes. Recently H202 has been proposed to be involved in the signal transduction pathways leading to acclimation and protection from abiotic stresses. The present review discusses new insights into the function of H202 in plant responses to biotic and abiotic stresses.The generation of reactive oxygen species (ROS) including singlet oxygen (102), superoxide radical anion (O2-), hydroxyl radical (OH) and hydrogen peroxide (H202) is an inevitable effect of the oxidative cellular metabolism. In plants ROS are synthesized as a by-product of photosynthesis, photorespiration, [3-oxidation of fatty acids and electron transport in mitochondria. Plants have evolved protective mechanisms to cope effectively with the potentially aggressive ROS. The ROS scavenging system includes enzymes such as superoxide dismutase, catalase and ascorbate peroxidase as well as non-enzymatic components: ascorbate, glutathione, (x-tocopherol and carotenoids. An excess production of ROS, resulting in oxidative stress, is promoted in plants exposed to biotic and abiotic stressful conditions. Such oxidative stress, potentially damaging to plant cells, was reported after herbivorous insect attack, viral, bacterial and fungal infection (Wojtaszek, 1997b) as well as in plants subjected to drought, flooding, high light intensity, chilling, heat, salinity, air pollutants and herbicides. An enhanced ROS generation has therefore been considered to be a general feature of a wide variety of stresses.

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Physiological, Biochemical and Molecular Effects of Sulfur Dioxide

Cited by 34 publications

References 42 publications

Light acclimation and HSO3 − damage on photosynthetic apparatus of three subtropical forest species

Light acclimation and HSO3 − damage on photosynthetic apparatus of three subtropical forest species

Oxidative Stress and Acclimation Mechanisms in Plants

The involvement of hydrogen peroxide in plant responses to stresses

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