Foliar application of amino acid biostimulants supplemented with silicon or sulfur in green beans
Year: 2026
Type: article
Abstract: High temperatures are considered the most important limiting factor for the productivity of beans, and the ongoing increase in global temperature is estimated to have a strong negative impact on its yield. With the aim of mitigating the effects of high temperatures that usually prevail during growing seasons, the efficacy of two novel biostimulants (not yet commercially available) based on amino acids supplemented with sulfur or silicon was tested in two consecutive growing seasons (early and late). During the early season (May 7–June 30), conditions of intense heat stress prevailed, and in combination with the cultivation of a relatively sensitive genotype, the marketable yield was reduced by 51%, compared to the yield in the late season (7,323 kg ha−1). The exogenous application of amino acid-based biostimulants supplemented with sulfur or silicon did not significantly mitigate yield reduction (7,143–7,693 kg ha−1). On the other hand, during the late season (August 5–October 19), conditions of milder heat stress prevailed, and in combination with the cultivation of a relatively resistant genotype, the marketable yield was high (14,915 kg ha−1). The exogenous application of amino acid-based biostimulants supplemented with sulfur or silicon did not significantly affect chlorophyll fluorescence parameters or yield (13,908–15,833 kg ha−1).
Institutions: Aristotle University of Thessaloniki, University of Florida
Language: English
Subfield: Plant Science
Domain: Life Sciences
SDG: Zero hunger
Open Access status: green
OpenAlex ID: W7161493485