SciELO - Scientific Electronic Library Online

vol.67 issue2Performance of maize single-crosses developed from populations improved by a modified reciprocal recurrent selectionEffect of pH and temperature on peroxidase and polyphenoloxidase activities of litchi pericarp author indexsubject indexarticles search
Home Pagealphabetic serial listing  

Services on Demand




Related links


Scientia Agricola

On-line version ISSN 1678-992X


BUSATO, Jader Galba et al. Humic substances isolated from residues of sugar cane industry as root growth promoter. Sci. agric. (Piracicaba, Braz.) [online]. 2010, vol.67, n.2, pp.206-212. ISSN 1678-992X.

Plant growth promoting substances are widely used in modern agriculture. Several products in the market are humic substances isolated from different sources. The filter cake, a residue of sugar production, is a rich and renewable source of organic matter and these characteristics place the filter cake as a possible source of plant growth promoting substances. Humic acids (HA) from filter cake were characterized, and their effects as root growth promoters were evaluated. Chemical features of the HA were evaluated through elemental composition, acidic functional groups, E4/E6 ratio and infrared spectroscopy analyzes. The biological activity of the HA was assessed using root architecture parameters and the P-type H+-ATPase activity. The lateral root development was directly related to the stimulation of plasma membrane ATPase activity. The ability of HA to promote root development indicate that HA from filter cake can be used as environmental plant growth stimulators.

Keywords : H+-ATPase; Brazil; industrial residues; physiological effects; bioactivity.

        · abstract in Portuguese     · text in English     · English ( pdf )


Creative Commons License All the contents of this journal, except where otherwise noted, is licensed under a Creative Commons Attribution License