The Effects of Humic Acid Applications on Heavy Metal Stress in Lettuce

Authors

  • Fatma Özkay Toprak Gübre ve Su Kaynakları Araştırma Enstitüsü, 06172 Ankara
  • Sevinç Kıran Çankırı Karatekin Üniversitesi, Kızılırmak Meslek Yüksekokulu, 18280 Çankırı
  • Şebnem Kuşvuran
  • Şeküre Şebnem Ellialtıoğlu Ankara Üniversitesi, Ziraat Fakültesi, Bahçe Bitkileri Bölümü, 06110 Ankara

DOI:

https://doi.org/10.24925/turjaf.v4i6.431-437.542

Keywords:

Lactuca sativa var. Crispa, Cu, Cd, Pb, Zn, Antioxidative enzyme, MDA

Abstract

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.

Published

15.06.2016

How to Cite

Özkay, F., Kıran, S., Kuşvuran, Şebnem, & Ellialtıoğlu, Şeküre Şebnem. (2016). The Effects of Humic Acid Applications on Heavy Metal Stress in Lettuce. Turkish Journal of Agriculture - Food Science and Technology, 4(6), 431–437. https://doi.org/10.24925/turjaf.v4i6.431-437.542

Issue

Section

Crop Production