Subscribe Now Subscribe Today
Science Alert
FOLLOW US:     Facebook     Twitter
Curve Top
International Journal of Agricultural Research
  Year: 2006 | Volume: 1 | Issue: 2 | Page No.: 122-141
DOI: 10.3923/ijar.2006.122.141
Facebook Twitter Digg Reddit Linkedin StumbleUpon E-mail
Heavy Metal Uptake and Detoxification Mechanisms in Plants
Shruti Mishra and R. S. Dubey

Plants take up heavy metals from their surroundings via a number of different plasma membrane localized transporters. Inside the plant system toxicity of heavy metals is manifested by an array of physiological and metabolic disturbances if metal detoxification processes are delayed or not efficient. Immobilization of heavy metals by root exudates and in some cases mycorrhizal association constitute the extracellular mode of detoxification whereas chelation of heavy metals by phytochelatins, metallothioneins, organic acids and amino acids, induced synthesis of proline and synthesis of stress proteins are implicated in preventing metal accumulation in fully reactive form in the cytosol. Plant cells have developed sophisticated toxic metal sensing proteins that transmit signals to activate expression of metal detoxification and homeostasis genes in order to cope with the elevated heavy metal concentrations. In transducing signals of heavy metal origin involvement of second messengers viz., Ca2+, jasmonic acid and H2O2 as well as participation of ethylene and salicylic acid are likely. This review aims to give succinct overview of plant metal uptake and detoxification mechanisms.
PDF Fulltext XML References Citation Report Citation
  •    Biodiversity of Vesicular Arbuscular Mycorrhiza Associated with Catharanthus roseus, Ocimum spp. and Asparagus racemosus in Uttarakhand State of Indian Central Himalaya
How to cite this article:

Shruti Mishra and R. S. Dubey, 2006. Heavy Metal Uptake and Detoxification Mechanisms in Plants. International Journal of Agricultural Research, 1: 122-141.

DOI: 10.3923/ijar.2006.122.141








Curve Bottom