Efficiency of antioxidant response in Spartina densiflora: An adaptative success in a polluted environment

Martínez-Domínguez, D.; Heras, M. Ángeles de las; Navarro, Francisco; Torronteras, Rafael; Córdoba, Francisco

doi:10.1016/j.envexpbot.2007.07.005

Cited by 16 publications

(11 citation statements)

References 54 publications

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“…Many studies have shown that lack of necrotic damage in leaves after ozone treatment is correlated with the high ASA concentration in tissue, and ozone resistance is caused by higher ASA concentrations in tolerant plants than in sensitive plants (Luwe et al 1993;Severino et al 2007). However, in an extremely polluted habitat, ASA oxidations might be enhanced, resulting in an increase DHA due to inhibited ASA synthesis or recycling (Martínez-Domínguez et al 2008). Nevertheless, the reverse results were observed in our study.…”

Section: Discussioncontrasting

confidence: 67%

“…Susceptibility of plants to air pollutants, including SO 2 and O 3 was associated with their antioxidative ability (Aono et al 1993;VeljovicJovanovic et al 2001). Martínez-Domínguez et al (2008) also confirmed that the ability of an invasive plant Spartina densiflora to grow in polluted environment with prooxidant characteristics was related to the rapid and efficient modulation of a series of antioxidant defense mechanisms. Thus, a plant's active-oxygenscavenging ability may be a key element in stress tolerance.…”

Section: Introductionsupporting

confidence: 76%

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Effects of Simulated Acid Rain on the Antioxidative System in Cinnamomum philippinense Seedlings

Liu

2010

Water Air Soil Pollut

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This study examined the importance of the antioxidative defense mechanism during the application of simulated acid rain (SAR) pH 4, pH 3, pH 2, and pH 6 as control treatment in Cinnamomum philippinense seedlings. Analysis was carried out on 1, 10, and 15 days of spraying SAR. In our results, catalase (CAT), ascorbate peroxidase (APx), guaiacol peroxidase (GPOD), and glutathione reductase (GR) activity significantly were induced on 1 day of spraying SAR pH 3 and pH 2, suggesting that C. philippinense seedlings exposed to pH 3 and pH 2 acid rain for only 1 day were under oxidative stress, and antioxidant enzyme were apparently increased until 10 days of spraying SAR pH 4. However, on 10 days of spraying SAR pH 2, the accumulated intensity of acidity significantly inhibited the activities of CAT and APx accompanying with increased concentrations of malonydialdehyde (MDA). On the contrary, GPOD activity and the ascorbic acid ratio were remarkably increased when spraying SAR pH 2 for 15 days. Therefore, GPOD and ascorbate contribute to the scavenging of ROS at stronger acidity stresses. However, they were not enough to avoid cellular damage, since membrane lipids were injured, and necrosis appeared.

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Section: Discussioncontrasting

confidence: 67%

Section: Introductionsupporting

confidence: 76%

Effects of Simulated Acid Rain on the Antioxidative System in Cinnamomum philippinense Seedlings

Liu

2010

Water Air Soil Pollut

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“…Restoration of estuaries with the endemic native species S. maritima has a major influence in the ecosystem, from prevention of erosion to maintenance of avian community diversity (Curado et al, 2013). Non-restored marshes of the southwest coast of Spain are being colonised by the invasive S. densiflora, which is displacing the native S. maritima (Castillo et al, 2008(Castillo et al, , 2010Martínez-Domínguez et al, 2008). In fact, S. maritima is included on some European red lists aimed to promote the conservation of endangered species, including the one published by the Andalusian Government in Spain (Cabezudo et al, 2005).…”

Section: Discussionmentioning

confidence: 99%

Scouting contaminated estuaries: Heavy metal resistant and plant growth promoting rhizobacteria in the native metal rhizoaccumulator Spartina maritima

Mesa

Mateos‐Naranjo

Caviedes

et al. 2015

Marine Pollution Bulletin

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“…The decrease observed in tAA concentration, together with an increase in the rAA content, suggests both a decrease in AA biosynthesis and a relative increase in the recycling of the oxidized AA forms vs the de novo generation. All these data may indicate that the antioxidative defense system of S. densiflora is involved in the control of the oxidative damage and that this mechanism is mainly modulated by the ROS concentration (Martínez‐Domínguez et al 2008).…”

Section: Discussionmentioning

confidence: 99%

“…In previous studies, we developed an experimental approach (Martínez-Domínguez et al 2008) with S. densiflora plants, brought from the in situ locations and subjected to an acclimation period and subsequently to a treatment period for 2 months. These experiments allow us to follow the modulation of the antioxidative system in different culture conditions.…”

Section: Experimental Design: Plant Materials and Growth Conditionsmentioning

confidence: 99%

Cadmium-induced oxidative stress and the response of the antioxidative defense system inSpartina densiflora

Domínguez

García

Canalejo

et al. 2010

Physiologia Plantarum

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Spartina densiflora is an invasive cordgrass that is colonizing new habitats and ousting indigenous species in pro-oxidative environments like cadmium-polluted salt marshes in the Odiel estuary (Spain). The aim of our study was to characterize its antioxidative system in order to find out if the system underlies the tolerance of S. densiflora to cadmium toxicity. S. densiflora plants were firstly evaluated to ascertain its antioxidative status in the natural habitat and then they were cultured in the laboratory in unpolluted sand for 28 days. Throughout this period, plants acclimatized and oxidative stress markers reached stable low levels. Then, S. densiflora plants were exposed to cadmium concentrations (10, 100 and 1000 microM Cd) for another 28 days. Higher Cd content in leaves was related to higher level of reactive oxygen species (ROS) causing important oxidative cell damage (lipid peroxidation and lower chlorophyll content). However, S. densiflora possesses a well-organized and appropriately modulated antioxidative defense system which comprises enzymatic activities of guaiacol peroxidase (EC 1.11.1.7), catalase (EC 1.11.1.6), ascorbate peroxidase (EC 1.11.1.11) and superoxide dismutase (EC 1.15.1.1) coupled with the activation of the ascorbate cycle, including enzymatic activities of glutathione reductase (EC 1.6.4.2), dehydroascorbate reductase (EC 1.8.5.1) and monodehydroascorbate reductase (EC 1.6.5.4). This activation was sufficient to reduce Cd-induced ROS accumulation and oxidative damage caused by the lowest Cd-concentrations, but not by the highest Cd-concentration (1000 microM). Nevertheless, the antioxidant system seems to be efficient to achieve a tolerance to cadmium toxicity, allowing normal plant development, even at the presence of highest Cd concentration.

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Efficiency of antioxidant response in Spartina densiflora: An adaptative success in a polluted environment

Cited by 16 publications

References 54 publications

Effects of Simulated Acid Rain on the Antioxidative System in Cinnamomum philippinense Seedlings

Effects of Simulated Acid Rain on the Antioxidative System in Cinnamomum philippinense Seedlings

Scouting contaminated estuaries: Heavy metal resistant and plant growth promoting rhizobacteria in the native metal rhizoaccumulator Spartina maritima

Cadmium-induced oxidative stress and the response of the antioxidative defense system inSpartina densiflora

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