Selenium uptake,translocation, assimilation and metabolic fate in plants |
| |
Authors: | TG?Sors DR?Ellis Email author" target="_blank">DE?SaltEmail author |
| |
Institution: | (1) Horticulture and Landscape Architecture, Center for Plant Environmental Stress Physiology, Purdue University, 1165 Horticulture Building, West Lafayette, IN 47907, USA |
| |
Abstract: | The chemical and physical resemblance between selenium (Se) and sulfur (S) establishes that both these elements share common
metabolic pathways in plants. The presence of isologous Se and S compounds indicates that these elements compete in biochemical
processes that affect uptake, translocation and assimilation throughout plant development. Yet, minor but crucial differences
in reactivity and other metabolic interactions infer that some biochemical processes involving Se may be excluded from those
relating to S. This review examines the current understanding of physiological and biochemical relationships between S and
Se metabolism by highlighting their similarities and differences in relation to uptake, transport and assimilation pathways
as observed in Se hyperaccumulator and non-accumulator plant species. The exploitation of genetic resources used in bioengineering
strategies of plants is illuminating the function of sulfate transporters and key enzymes of the S assimilatory pathway in
relation to Se accumulation and final metabolic fate. These strategies are providing the basic framework by which to resolve
questions relating to the essentiality of Se in plants and the mechanisms utilized by Se hyperaccumulators to circumvent toxicity.
In addition, such approaches may assist in the future application of genetically engineered Se accumulating plants for environmental
renewal and human health objectives. |
| |
Keywords: | APS reductase ATP sulfurylase S-methylcysteine Se-methylselenocysteine selenocysteine methyltransferase sulfur volatilization |
本文献已被 PubMed SpringerLink 等数据库收录! |
|