Carbon allocation of Spirodela polyrhiza under boron toxicity

Pectic polysaccharides containing apiose, xylose, and uronic acids are excellent candidates for boron fixation. Duckweeds the fastest-growing angiosperms that can absorb diverse metals contaminants from water have high pectin content in their cell walls. Therefore, these plants be considered (B) accumulators. This work aimed to investigate relationship between B assimilation capacity with apiose wall of Spirodela polyrhiza subjected different boric acid concentrations. Plants were grown 7 10 days ½ Schenck-Hildebrandt media supplemented 0 56 mg B.L -1 , non-structural structural carbohydrates, related genes evaluated. The results showed altered morphology carbohydrate composition this species during plant development. optimum concentration (1.8 ) led highest relative growth biomass accumulation, reduced starch, contents, together increased expression UDP-apiose/UDP-xylose synthase ( AXS 1,4-α-galacturonosyltransferase GAUT ). toxic state (28 hexose contents a concomitant reduction pectins, growth. S. was strongly associated its regulation within cells, which as an important regulator. These findings suggest duckweeds suitable remediation, used bioenergy production.