Effect of Excess Copper on Tomato Plants: Growth Parameters, Enzyme Activities, Chlorophyll, and Mineral Content

Martins, L. L.; Mourato, Miguel

doi:10.1080/01904160600972845

Cited by 70 publications

(38 citation statements)

References 36 publications

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“…Our results show an increase in the activity of this enzyme but whether this is due to a putative action in relation to Cu induced stress or to the increase in plant Cu contents remains unclear. In a previous study (Martins and Mourato 2006) we observed an increase in this enzyme activity with Cu in tomato plants and a possible H 2 O 2 -quenching role was hypothesised. Other authors have suggested the involvement of PPO in response to Cu stress in Panax ginseng roots (Ali et al 2006) or in lignification changes in relation to heavy metal stress in Silene paradoxa (Gonnelli et al 2001).…”

Section: Discussionmentioning

confidence: 92%

Physiological responses of Lupinus luteus to different copper concentrations

Mourato¹,

Martins²,

Campos-Andrada³

2009

Biol. plant.

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Yellow lupin (Lupinus luteus L.) plants were grown in hydroponic solution for 15 d under different copper concentrations (0.1, 0.5, 1.0, 10, 25 and 50 μM). With increasing Cu concentration total biomass was not affected, leaf area slightly decreased, while chlorophyll content decreased considerably. Cu content increased significantly both in roots and in leaves, but the contents of other ions were only slightly affected at the highest Cu concentration (Mn content decreased both in roots and in leaves, P content decreased only in leaves and Zn content increased in roots). Superoxide dismutase (SOD) activity increased up to day 7 after copper application. Peroxidase (GPOD) and polyphenol oxidase (PPO) activities also increased, while catalase (CAT) activity remained constant.Additional key words: yellow lupin, oxidative stress, heavy metal toxicity.

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Section: Discussionmentioning

confidence: 92%

Physiological responses of Lupinus luteus to different copper concentrations

Mourato¹,

Martins²,

Campos-Andrada³

2009

Biol. plant.

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“…It was previously noticed that the activity of POD raised transiently as an early antioxidant response against Cu induced oxidative stress in the leaves of tomato. However, this antioxidant defense mechanism broke down and activity of enzyme reduced at the higher CuSO4 concentration [20]. The study carried on rice exposed to Cd(NO3)2 indicated that the activities of POD and SOD raised, and the increase in POD activity was greater than SOD in the rice seedlings [21].…”

Section: Discussionmentioning

confidence: 99%

The Responses of Antioxidant System against the Heavy Metal-Induced Stress in Tomato

Kısa

2017

SDÜ Fen Bil Enst Der

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Plants maintain their life cycles under the various environmental conditions such as oxidative stress induced by heavy metals. Accumulation of metal ions in plants causes the formation of free radicals and stimulates the antioxidative defense systems. In this study, the activities of APX, POD, and SOD are investigated in the leaves and roots of tomato cultivated under the heavy metal-induced stress. The activities of APX, POD, and SOD exhibited remarkable induction with the treatment of Cd, Cu and Pb (10, 20 and 50 ppm) in the leaves of tomato compared to control plants except for 50 ppm Pb. In roots, APX activity changed depending on the heavy metal types and concentrations, while Cd clearly increased it with stress conditions, but Cu decreased in tomato compared to control. The activity of POD clearly exhibited that the all doses of heavy metals reduced the enzyme activity in roots polluted with heavy metals. The treatment of Cd (10, 20 and 50 ppm) significantly increased the activity of SOD, however, Cu showed the opposite effect which significantly decreased with increasing doses in roots compared to uncontaminated plants. Also, roots from plants grown on the high concentration of Pb (20 and 50 ppm) induced the activity of SOD. Briefly, it is clear responses which Cd significantly raised the activities of APX and SOD in leaves and roots of tomato. The decreases caused by these metals in the activity of POD and Cu in the activities of APX and SOD in roots of tomato can be clarified by the result of heavy metal-induced the over production of free radical. Domateste Ağır Metal Kaynaklı Strese Karşı Antioksidan Sistem YanıtlarıAnahtar Kelimeler Ağır metal, APX, Domates, POD, SOD Özet: Bitkiler ağır metal kaynaklı oksidatif stres gibi çeşitli çevresel koşullar altında yaşamlarını sürdürürler. Ağır metallerin bitkilerde birikimi serbest radikallerin oluşmasına neden olur ve bu radikaller antioksidatif savunma sistemlerini uyarır. Mevcut çalışmada, ağır metal kaynaklı stres altında yetiştirilen domates bitkisinin kök ve yapraklarında ROS'u ortadan kaldırabilen APX, POD ve SOD enzim aktiviteleri araştırılmıştır. Bu enzimlerin aktiviteleri Cd, Cu ve Pb (10, 20 and 50 ppm) uygulaması sonucu yapraklarda 50 ppm Pb dışında kontrol grubuyla karşılaştırıldığında belirgin bir biçimde artış göstermiştir. Bitki köklerinde, APX aktivitesi ağır metal çeşit ve dozuna bağlı olarak değişmiştir. Kontrol grubuna kıyasla domateste, Cd uygulaması APX aktivitesini stres koşullarında artırırken, Cu enzimin aktivitesini azaltmıştır. Ağır metalle kirletilmiş köklerde POD aktivitesi tüm dozlarda açık bir şekilde azalmıştır. Köklerde kontrol grubuyla karşılaştırıldığında Cd (10, 20 and 50 ppm) uygulaması SOD aktivitesini önemli şekilde artırmıştır, fakat Cu ilavesi artan dozla birlikte ters etki göstererek SOD aktivitesini azaltmıştır. Ayrıca, yüksek konsantrasyonda Pb uygulaması (20 ve 50 ppm) bitki köklerinde SOD aktivitesini artırmıştır. Kısaca, kadmiyum uygulamasının domates kök ve yapraklarında APX ve SOD aktivitelerini art...

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“…Different metals vary greatly in their detailed biochemical effects, but they usually cause some kind of oxidative damage, resulting in phenotypic effects which often are similar for the different elements (Shaw et al 2004). For example, chlorophyll content and photosynthesis are reduced by exposure to elevated levels of Cu, Ni and other heavy metals (Burzynski and Kłobus 2004;Martins and Mourato 2006;Ouzounidou et al 2006;Gajewska et al 2006;Alam et al 2007). Heavy metals reduce the number of chloroplasts and the area of thylacoid membranes, and cause damage to root tips (Barceló and Poschenrieder 2004).…”

Section: Introductionmentioning

confidence: 95%

Growth, root and leaf structure, and biomass allocation in Leucanthemum vulgare Lam. (Asteraceae) as influenced by heavy-metal-containing slag

Ryser

Emerson

2007

Plant Soil

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Effects of heavy metal contamination on growth, leaf turnover, biomass allocation and leaf and root structure of Leucanthemum vulgare Lam. were investigated. Plants were grown in two outdoor experiments, for 5 weeks or for 3 months, respectively, on sand with different additions of slag containing elevated levels of heavy metals, especially Cu and Ni. In the 3-month experiment nutrients were provided as composted manure, in the 5-week experiment as a solution. Slag contamination reduced plant growth, biomass allocation to roots, specific root length and specific leaf area, while root tissue density and leaf dry matter content increased. Fine root diameter increased, whereas coarse root diameters showed a nonsignificant decreasing trend. Toxicity of slag was lower in the 3-month experiment, probably due to organic matter in the substrate. We conclude that heavy metals in the soil around Cu-Ni smelters may, besides directly reducing growth of the plants, increase their susceptibility to other stresses such as drought, by reducing the root length to leaf area ratio. Fine and coarse roots show distinct responses, indicating that different root diameter classes should be regarded separately to fully understand stress responses of root systems.

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Effect of Excess Copper on Tomato Plants: Growth Parameters, Enzyme Activities, Chlorophyll, and Mineral Content

Cited by 70 publications

References 36 publications

Physiological responses of Lupinus luteus to different copper concentrations

Physiological responses of Lupinus luteus to different copper concentrations

The Responses of Antioxidant System against the Heavy Metal-Induced Stress in Tomato

Growth, root and leaf structure, and biomass allocation in Leucanthemum vulgare Lam. (Asteraceae) as influenced by heavy-metal-containing slag

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