TITLE:
Concentration of Salicylic Acid in Tomato Leaves after Foliar Aspersions of This Compound
AUTHORS:
Enrique Guzmán-Téllez, Daniel Díaz Montenegro, Adalberto Benavides-Mendoza
KEYWORDS:
Chemically Induced Resistance, Defense Signaling, Elicitor
JOURNAL NAME:
American Journal of Plant Sciences,
Vol.5 No.13,
June
26,
2014
ABSTRACT: Increased plant tolerance
to stress may be chemically induced with applications of salicylic acid (SA).
The aim of this study was to determine the change in the SA leaf concentration
over time in response to the SA spraying in leaves of greenhouse grown tomato.
In sprayed leaves the SA concentration showed changes over time similar to the
reported responses to environmental stress. Two days after the first
application, the SA foliar concentration reached the maximum of 8 μg·g-1,
equivalent to twice the amount observed in the control plants. SA decreased
until it reached the level of control plants eight days later. A second
application showed actually the same response, but with a faster decline of SA
in two days. According to the results of this assay, SA applications on tomato
should be performed within a minimum interval of eight days in order to
maintain the SA concentration related with the increase in plant tolerance to
environmental stress.