@Article{phyton.2020.07180,
AUTHOR = {Monika Sood, Shanti S. Sharma, Joginder Singh, Ram Prasad, Dhriti Kapoor},
TITLE = {Stress Ameliorative Effects of Indole Acetic Acid on <i>Hordeum vulgare</i> L. Seedlings Subjected to Zinc Toxicity},
JOURNAL = {Phyton-International Journal of Experimental Botany},
VOLUME = {89},
YEAR = {2020},
NUMBER = {1},
PAGES = {71--86},
URL = {http://www.techscience.com/phyton/v89n1/38400},
ISSN = {1851-5657},
ABSTRACT = {The heavy metals present in the environment accumulate in the plants 
and affect their productivity and yield. By entering the food chain, metals cause 
several serious health problems in human beings as well as in other organisms. 
Indole acetic acid (IAA) is known to act as a signaling molecule between symbiotic 
association of metal accumulating plants and plant growth promoting rhizobacteria 
(PGPR). Present study demonstrated a protective role of IAA against surplus Zinc
(Zn)-induced toxicity to <i>Hordeum vulgare</i> seedlings. Elevated Zn concentrations 
suppressed the plant growth, caused a reduction in leaf relative water contents 
(RWC) and elevated free proline and non-protein thiols (NPT) accumulation. Zinc
treatment also led to enhanced lipid peroxidation (MDA contents) as well as the 
activity of ascorbate peroxidase (APX), showing the involvement of antioxidative 
defense mechanism to reduce Zn induced toxicity. IAA oxidase activity was also 
observed to increase due to Zn treatment. IAA pretreatment of <i>H. vulgare</i> caryopsis 
could partly revert the Zn-induced toxicity in seedlings.},
DOI = {10.32604/phyton.2020.07180}
}