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1 December 2013 FT and NPR1 expression patterns in Arabidopsis thaliana during flowering and in response to salicylate
James J. McGivern, Mike T. Ganger, Sarah J. Ewing
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Abstract

For annuals, the timing of flowering is directly related to fitness and many factors influence it including temperature, photoperiod, resource level, physical stress, and pathogenic infection. The expression of “flowering genes” is regulated by these factors in order to mediate this timing. The FT gene is thought to be expressed in response to all of these factors while the NPR1 gene is induced by salicylic acid (SA), a signaling molecule in the stress-induced flowering pathway. It is unknown whether stress-induced expression of NPR1 may alter expression of specific “flowering genes” such as FT or whether SA may directly influence the expression of FT. Thus, we examined the expression of FT and NPR1 in Arabidopsis thaliana in response to exogenous application of SA. Gene expression was measured using RT-qPCR. Student t-tests were used to assess differences in expression of both FT and NPR1 in response to SA application. FT expression did not significantly differ in response to SA; however, this is likely a result of mispriming due to homology of FT-related genes. Surprisingly, NPR1 expression was not induced by SA in our study. Although our results provide some insights, creative primer design to measure FT expression and modifications to the experimental design are needed to fully elucidate the relationship between FT and NPR1 expression and SA.

James J. McGivern, Mike T. Ganger, and Sarah J. Ewing "FT and NPR1 expression patterns in Arabidopsis thaliana during flowering and in response to salicylate," BIOS 84(4), 241-249, (1 December 2013). https://doi.org/10.1893/0005-3155-84.4.241
Received: 22 September 2012; Accepted: 1 January 2013; Published: 1 December 2013
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