Resistance and biomass in Arabidopsis: a new model for Salicylic Acid perception

Abstract

SummarySalicylic acid (SA) is an essential hormone for plant defence and development. SA NPR1-related genotypes also confirm the pivotal role of NPR1 in SA perception, and suggest an active program of depletion of resources in the infected tissues.

Quantitative genetic analysis of salicylic acid perception in Arabidopsis

“…There is an alternative way of assessing the response to BTH: by measuring the difference in plant fresh weight after several treatments (Canet et al 2010a). When this alternative measurement of response was used, the differences were reduced in SAQ3 and SAQ4.…”

“…A system was proposed where no pathogen is involved, but this framework does not produce any relevant output in terms of natural variation (Canet et al 2010a). For this reason, we have looked for the best conditions to maximize the differences among ecotypes by using chemicals that induce resistance through SA perception.…”

“…Therefore, Edi-0 vs. Stw-0 discriminate SA from BTH, and SAQ3 and SAQ4 do not discriminate between these two analogues. Regarding this way of measuring SA perception, note that the BTH treatments used do not produce macroscopic cell death that could affect the fresh weight measurements (Canet et al 2010a). …”

“…was sown and grown as described (Canet et al 2010a), in phytochambers with days of 8 h at 21°C, 150 µmol m -2 s -1 and nights of 16 h at 19°C. All the ecotypes, mutants, and mapping populations were obtained from NASC (www.arabidopsis.info).…”

“…Our ongoing interest in SA perception has led us to inquire about it in the reported mutants in defence (Canet et al 2010a) as well as in new screenings (Canet et al 2010b). A resource that has not been used extensively to study SA is the natural variation of Arabidopsis.…”