Induction of cadmium-binding peptides in sorghum
2004
Pinto, Ana Paula Honrado | Serafim, Angela | Bebianno, Maria | Almeida Mota, Ana Maria
Hydroponic experiments with sorghum were carried out in nutrient solution medium, under controlled environmental conditions for different periods of time. Cadmium (Cd ) was added at a final concentration of 0.1, 1 and 10 mg dm−3. The effect of time and cadmium concentration on the content of thiolic groups (TSH) in the “cell sap” of sorghum tissues are discussed in relation to plant resistance/tolerance to metal stress. The increase in Cd level in the nutrient solution was associated with a higher total Cd accumulation in the plant (root and shoot), which produced a significant enhancement on the thiolic groups content. Furthermore, higher Cd concentrations in plant tissues induced not only an increase in sulphur-rich compounds but also enhanced the binding capacity of these compounds.
显示更多 [+] 显示较少 [-]This work is under the Research Project PRAXIS/P/QUI/10034/98 of FCT. It has also the financial support supplied by the Portuguese Education Ministry through the PRODEP II – PhD fellowship.
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