scholarly journals Hümik Asit Uygulamasının Kıvırcık Salata Bitkisinde Ağır Metal Stresi Zararını Azaltma Etkisi

2016 ◽  
Vol 4 (6) ◽  
pp. 431
Author(s):  
Fatma Özkay ◽  
Sevinç Kıran ◽  
Şebnem Kuşvuran ◽  
Şeküre Şebnem Ellialtıoğlu
Keyword(s):  
Heavy Metal ◽  
Humic Acid ◽  
Growth And Development ◽  
Acid Treatment ◽  
Dry Weight ◽  
Heavy Metal Stress ◽  
Metal Stress ◽  
Antioxidative Enzyme Activities ◽  
Irrigation Levels ◽  
Positive Effect

In this study was carried out to determine the effects of humic acid in heavy metal stress of lettuce changes in some of the morphological and physiological characteristics. In studies conducted in controlled greenhouse conditions, lettuce plants subjected to four different 4 different humic acid levels humic acid doses (0, 2, 4, 8 L/da) and 4 different heavy metal irrigation levels (Control: 0 ppm; I. mixture: 0.2 ppm Cu + 0.01 ppm Cd + 5 ppm Pb + 2 ppm Zn; II. mixture: : 0.4 ppm Cu + 0.02 ppm Cd + 10 ppm Pb + 4 ppm Zn; III. mixture: 0.8 ppm Cu + 0.04 ppm Cd + 20 ppm Pb + 8 ppm Zn). Four weeks after at heavy metal and humic acid treatment young plants were harvested and the shoot fresh and dry weight, root fresh and dry weight, shoot and root length, and leaf areas, MDA, superoxyde dismutase (SOD) and glutathione reductase (GR) were determined. The most highly toxic effects were determinate III. mixture level (0.8 ppm Cu + 0.04 ppm Cd + 20 ppm Pb + 8 ppm Zn). MDA and antioxidative enzyme activities increased in plants irrigated with water containing a mixture of heavy metal. Humic acid applications had a positive effect on reducing of the limiting effect of heavy metal stress on growth and development.

scholarly journals AğırMetal İçeriği Yüksek Sularla Sulanan Patlıcan Bitkilerine Uygulanan Humik Asidin Bazı Morfolojik, Fizyolojik ve Biyokimyasal ÖzelliklerÜzerine Etkisi

2014 ◽  
Vol 2 (6) ◽  
pp. 280 ◽  
Author(s):  
Sevinc Kiran ◽  
Fatma Özkay ◽  
Kuşvuran Şebnem ◽  
Ellialtıoğlu Şebnem
Keyword(s):  
Heavy Metal ◽  
Humic Acid ◽  
Leaf Area ◽  
Irrigation Water ◽  
Enzyme Activities ◽  
Root Length ◽  
Field Capacity ◽  
Dry Weight ◽  
Heavy Metal Stress ◽  
Metal Stress

In this study, it was aimed to demonstrate the effect of humic acid applications on some morphological, physiological and biochemical characteristics of eggplant genotypes (Burdur Merkez, Burdur Bucak, Kemer and Giresun) irrigated with the irrigation water with a high content of heavy metal and determined previously salt tolerance levels. In studies conducted in controlled greenhouse conditions, eggplant seeds germinated in the growth substrate a mixture of peat and perlite and the seedlings were transplanted into pots at 20 days after sowing. Plants when they are 4-5 true leaves, 3 different humic acid levels (0, 500, 1000 ppm) have been applied and 7 days later after this application began to be watered with 3 different irrigation water comprising a mixture of various doses of heavy metals (control: 0 ppm; I. Mixture: 0.2 ppm 5 ppm to 0.01 ppm Cd + Cu + Pb + 2 ppm Zn, II. mixture: +0.02 ppm 0.4 ppm Cu 10 ppm Pb + Cd + 4 ppm Zn). Field capacity level for the plants 40 days after quenched with water after which time they were harvested and samples for analysis were performed. In the study plants were investigated for shoot and root fresh weight, shoot and root dry weight, shoot and root length, leaf area, chlorophyll and MDA level of superoxide dismutase (SOD), catalase (CAT), ascorbate peroxidase (APX) and glutathione reductase (GR) enzyme activities All genotypes are adversely affected by heavy metal applications. In parallel to increase the dose, heavy metal mixtures led to a reduction in values of fresh and dry weight of shoot and root, stem and root length, leaf area of eggplant genotypes. MDA and antioxidative enzyme activities increased in plants irrigated with water containing a mixture of heavy metal. Humic acid applications had a positive effect on reducing of the limiting effect of heavy metal stress on growth and development. As a result, compared to sensitive genotypes Giresun and Kemer, salt tolerant genotypes Burdur Merkez and Burdur Bucak showed much better resistance to abiotic stress factor which consists of heavy metal applications. The obtained results; formed also an opinion about that plants evolved similar strategies for resistance to abiotic stresses such as salinity, drought and heavy metal stress.

scholarly journals POLYAMINES: ROLE IN ATTENUATION OF HEAVY METAL TOXICITY

2018 ◽  
Vol 5 (1) ◽  
pp. 60-63
Author(s):  
Barsha Majumder ◽  
Asok K. Biswas
Keyword(s):  
Heavy Metal ◽  
Growth And Development ◽  
Metal Toxicity ◽  
Environmental Changes ◽  
Heavy Metal Stress ◽  
Heavy Metal Toxicity ◽  
Metal Stress ◽  
Stressed Condition ◽  
High Accumulation ◽  
Polyamine Biosynthesis

Environmental changes resulted in a variety of stresses in plants of which heavy metal stress holds important position, affect the growth and development and trigger a series of morphological, physiological, biochemical and molecular changes in plants. When exposed heavy metal stress, the complex dynamickinetics of polyamine biosynthesis was observed. Polyamines are small organic polycations present in all organisms and have a leading role in signaling, plant growth and development and deliver tolerance to a cultivar against stresses. High accumulation of polyamines (putrescine, spermidine and spermine) in plantsduring heavy metal stress has been well reported and is correlated with increased tolerance to different plants under stressed condition. Genetic engineering of polyamine biosynthetic genes in crop plants is the way to create resistance heavy metal toxicity.

Effects of Metal Stress on Visible/Near-Infrared Reflectance Spectra of Vegetation

2011 ◽  
Vol 347-353 ◽  
pp. 2735-2738 ◽  
Author(s):  
Guang Yu Chi ◽  
Yi Shi ◽  
Xin Chen ◽  
Jian Ma ◽  
Tai Hui Zheng
Keyword(s):  
Heavy Metal ◽  
Structural Changes ◽  
Near Infrared ◽  
Leaf Surface ◽  
Spectral Response ◽  
Spectral Characteristics ◽  
Surface Characteristics ◽  
Heavy Metal Stress ◽  
Metal Stress ◽  
Near Infrared Reflectance

Vegetation which suffers from heavy metal stresses can cause changes of leaf color, shape and structural changes. The spectral characteristics of vegetation leaves is related to leaf thickness, leaf surface characteristics, the content of water, chlorophyll and other pigments. So the eco-physiology changes of plants can be reflected by spectral reflectance. Studies on the spectral response of vegetation to heavy metal stress can provide a theoretical basis for remote sensing monitoring of metal pollution in soils. In recent decades, there are substantial amounts of literature exploring the effects of heavy metals on vegetation spectra.

scholarly journals Differential gene expressions in arbuscular mycorrhizal-colonized tomato grown under heavy metal stress

2005 ◽  
Vol 162 (6) ◽  
pp. 634-649 ◽  
Author(s):  
Fouad Ouziad ◽  
Ulrich Hildebrandt ◽  
Elmon Schmelzer ◽  
Hermann Bothe
Keyword(s):  
Heavy Metal ◽  
Arbuscular Mycorrhizal ◽  
Heavy Metal Stress ◽  
Metal Stress ◽  
Gene Expressions ◽  
Differential Gene
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