SciELO - Scientific Electronic Library Online

vol.30 issue3Soil fertility and maize yields in green manure systems in northern Minas GeraisMapping the bio-volume of submerged aquatic vegetation through hydro-acoustic data and high-resolution multi-spectral imaging author indexsubject indexarticles search
Home Pagealphabetic serial listing  

Services on Demand




Related links


Planta Daninha

Print version ISSN 0100-8358


ARALDI, R. et al. Photosynthetic efficiency and water consumption of Ipomoea triloba after herbicide application . Planta daninha [online]. 2012, vol.30, n.3, pp.517-524. ISSN 0100-8358.

This work was carried out to evaluate fluorescence through electron transport rate (ETR), water consumption and intoxication of Ipomoea triloba after application of four herbicides with different mechanisms of action. The herbicides glyphosate, haloxyfop-methyl, diuron, and amicarbazone were applied using a stationary sprayer installed in the laboratory. After application, the plants were kept under greenhouse conditions. Electron transport rate, water consumption and plant intoxication were evaluated at various periods after the start of the experiment. ETR and intoxication data were expressed as percentage of control and subjected to analysis of variance and comparison of means. The water consumption data were accumulated and adjusted to regression models. Based on the results obtained, it was concluded that the fluorometer is an appropriate tool to verify anticipated toxicity in plants of I. triloba treated with the herbicides amicarbazone and diuron, whereas ETR inhibition was observed before any visual intoxication experienced by the plants. Also, water consumption was found to be directly related to ETR, except for the plants subjected to haloxyfop-methyl which did not suffer electron transport interference, but reduced water consumption.

Keywords : fluorometer; glyphosate; haloxyfop-methyl; diuron; amicarbazone.

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


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