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Publication Details
AFRICAN RESEARCH NEXUS
SHINING A SPOTLIGHT ON AFRICAN RESEARCH
agricultural and biological sciences
Bioassay to detect Ascophyllum nodosum extract-induced cytokinin-like activity in Arabidopsis thaliana
Journal of Applied Phycology, Volume 23, No. 3, Year 2011
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Description
Ascophyllum nodosum, a brown macroalga, is the most widely used seaweed in agriculture. We report a rapid method for the detection of cytokinin-like activity in plants treated with a commercial A. nodosum liquid concentrate (Stimplex®) using a transgenic line of Arabidopsis carrying the ARR5 promoter fused to ß-glucuronidase (GUS) reporter gene. Based on GUS activity assay, an increase in cytokinin-like activity was detected in plants grown in vitro treated with 3 mL L-1 Stimplex®, whereas foliar spray treatments showed similar cytokinin-like activity at a concentration of 5 mL L-1. Histochemical staining showed Stimplex®-induced GUS activity in leaf as well as in the root tissues. Taken together, our results suggest that Stimplex® contains compounds that may elicit endogenous cytokinin-like activity. Furthermore, it is shown that this bioassay can be used for rapid screening of extracts that can stimulate cytokinin-like activities using Arabidopsis AAR5::GUS reporter transgenic plants. © 2010 Springer Science+Business Media B.V.
Authors & Co-Authors
Khan, Wajahatullah M.
Saudi Arabia, Riyadh
College of Sciences
Hiltz, David
Canada, Dartmouth
Acadian Seaplants Limited
Critchley, Alan T.
Canada, Dartmouth
Acadian Seaplants Limited
Prithiviraj, Balakrishnan
Canada, Halifax
Dalhousie University
Statistics
Citations: 72
Authors: 4
Affiliations: 3
Identifiers
Doi:
10.1007/s10811-010-9583-x
ISSN:
09218971
Research Areas
Genetics And Genomics