Chemistry Reference
In-Depth Information
2 Physiological Studies of Exogenous Application
of Salicylic Acid as a Basis to Increase Plant Productivity
(a) Positive Effect of Salicylic Acid in Stress Physiology
From the early 1970s, ongoing research and development has been carried out
from which four basic contributions can be highlighted to support the premise that
SA has potential in food production.
The first refers to 1978 when it was proposed that the application of aspirin to
bean plantlets had an effect on the hydric status of the plant, a fact that was
confirmed in specific bioassays carried out with stomata using the bioassay of
Commelina communis epidermis strips (Larqué-Saavedra
1978
,
1979
). The news
was given coverage by the international press, whose reports indicated that aspirin
could be used to save crops in conditions of stress caused by drought (The Times
1978
). This indication, to the effect that salicylates had the potential to participate
in the physiology of plants subjected to stress, was later demonstrated by several
authors thereafter (Shimakawa et al.
2012
).
(b) Positive Effect of Salicylic Acid in the Root System
The second observation was when it was detected that SA favored growth in
plant root systems (Gutiérrez-Coronado et al.
1998
). This effect was estimated by
the application of salicylates to intact soya beans plants, and was later validated in
other plants. The discovery was confirmed using the bioassay of transformed
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