Thresholds of heavy-metal toxicity in cuttings of European black poplar (Populus nigra L.) determined according to antioxidant status of fine roots and morphometrical disorders

Stobrawa, Krzysztof; Lorenc‐Plucińska, Gabriela

doi:10.1016/j.scitotenv.2007.09.024

Cited by 41 publications

(16 citation statements)

References 36 publications

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“…The cause of the decrease in activity of some enzymes in the roots can be expressed by the fact that heavy metals triggered the over production of free radical in fine roots which is the first tissue to encounter the heavy metals in the plants. Therefore, roots are the most endangered of the plant's tissues and the first line of defense against toxicity in agricultural area [25]. This study elucidate that the treatment of heavy metals induced the activity of antioxidant enzymes in the leaves of tomato, but there was no clearly changes in the roots of tomato compared to control groups.…”

Section: Discussionmentioning

confidence: 72%

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

Kısa

2017

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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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Section: Discussionmentioning

confidence: 72%

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

Kısa

2017

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“…Due to these favourable features, it has been proposed as a model tree species and is now widely investigated to understand how tree plant species respond to environmental stress (Trupiano et al, 2013Romeo et al, 2014). Recently, due to its fast growing features, interest has been focused on Populus nigra L. (Stobrawa and Lorenc-Plucińska, 2008), prompting investigations to identify tolerant genotypes . However, despite the increasing body of interest on poplar tolerant genotypes, information about molecular mechanisms involved in Cd response in terms of tolerance or toxicity is still very scarce.…”

Section: Introductionmentioning

confidence: 99%

Effect of short-term cadmium stress on Populus nigra L. detached leaves

Lomaglio

Rocco

Trupiano

et al. 2015

Journal of Plant Physiology

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“…In plants, Hg ions can replace metals ion in photosynthetic pigments, causing a decrease in photosynthesis rates [12]. The toxicity of heavy metals is generally thought to be due to uncontrolled and excessive production of reactive oxygen species (ROS), which can cause peroxidation of lipids, inactivation of enzymes, and damaged DNA and other constituents of cells: all of these changes accelerate senescence in the affected plants or even kill them [13]. In response to heavy metals, higher plants have evolved various mechanisms to scavenge ROS [14].…”

Section: Introductionmentioning

confidence: 99%

Physiological and biochemical responses in the leaves of two mangrove plant seedlings (Kandelia candel and Bruguiera gymnorrhiza) exposed to multiple heavy metals

Huang

Wang

2010

Journal of Hazardous Materials

114

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Thresholds of heavy-metal toxicity in cuttings of European black poplar (Populus nigra L.) determined according to antioxidant status of fine roots and morphometrical disorders

Cited by 41 publications

References 36 publications

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

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

Effect of short-term cadmium stress on Populus nigra L. detached leaves

Physiological and biochemical responses in the leaves of two mangrove plant seedlings (Kandelia candel and Bruguiera gymnorrhiza) exposed to multiple heavy metals

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