Volume : III, Issue : IX, September - 2014

Alterations in Growth and Physiology of Wheat to Lead (Pb) Stress Under Soil Culture

Gurpreet Kaur

Abstract :

The present study was conducted to obtain quantitative information about the translocation of lead (Pb) in a soil culture experiment with wheat. The solutions of lead nitrate (500, 1000 and 2500 µM) were applied to achieve stress conditions in comparison to unstressed, water treated control variant. Plants were exposed to Pb solutions for 7 days under experimental dome conditions and various observations were recorded. Growth parameters, such as root length, shoot length and dry weight, exhibited a significant decline with increasing Pb treatment. In addition, the level of photosynthetic pigments decreased upon exposure to Pb in a linear manner. These results suggested manifestation of Pb–induced stress, which was confirmed by reduced Photochemical Efficiency of PSII (Fv/ Fm). After 7 days of treatment, malondialdehyde accumulated in the range of ~11–38% with respect to control over 500–2500 µM Pb exposure. Further, superoxide dismutase activity increased with increasing concentrations. On the other hand, a significant decline was observed in guaiacol peroxidase activity in wheat roots in a concentration– dependent manner. The study concludes that short–term Pb treatment alters growth and physiology of wheat grown under soil culture.

Keywords :

Article: Download PDF   DOI : 10.36106/ijsr  

Cite This Article:

Gurpreet Kaur Alterations in Growth and Physiology of Wheat to Lead (Pb) Stress Under Soil Culture International Journal of Scientific Research, Vol : 3, Issue : 9 September 2014

Number of Downloads : 1127

References :