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Publication
Addressing the contribution of small molecule-based biostimulants to the biofortification of maize in a water restriction scenario
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Advisor(s)
Abstract(s)
Biostimulants have become an asset for agriculture since they are a greener
alternative to traditionally used plant protection products. Also, they have
gained the farmers’ acceptance due to their effect on enhancing the
plant’s natural defense system against abiotic stresses. Besides commercially
available complex products, small molecule-based biostimulants are useful
for industry and research. Among them, polyamines (PAs) are well-studied
natural compounds that can elicit numerous positive responses in drought stressed plants. However, the studies are merely focused on the vegetative
development of the plant. Therefore, we aimed to evaluate how drenching
with putrescine (Put) and spermidine (Spd) modified the maize production
and the yield quality parameters. First, a dosage optimization was performed,
and then the best PA concentrations were applied by drenching the maize
plants grown under well-watered (WW) conditions or water deficit (WD).
Different mechanisms of action were observed for Put and Spd regarding
maize production, including when both PAs similarly improved the water
balance of the plants. The application of Put enhanced the quality and quantity
of the yield under WW and Spd under WD. Regarding the nutritional quality
of the grains, both PAs increased the carbohydrates content, whereas the
contribution to the protein content changed by the interaction between
compound and growth conditions. The mineral content of the grains was also
greatly affected by the water condition and the PA application, with the most
relevant results observed when Spd was applied, ending with flour richer in Zn, Cu, and Ca minerals that are considered important for human health.
We showed that the exogenous PA application could be a highly efficient
biofortification approach. Our findings open a new exciting use to be studied
deep in the biostimulant research.
Description
Keywords
Drenching Mineral nutrition Polyamines Yield Zea mays . Centro em Agricultura Sustentável e Tecnologia Alimentar
Citation
Hernandiz AE, Jiménez-Arias D, Morales-Sierra S, Borges AA and De Diego N (2022) Addressing the contribution of small molecule-based biostimulants to the biofortification of maize in a water restriction scenario. Front. Plant Sci. 13:944066. doi: 10.3389/fpls.2022.944066
Publisher
Frontiers Media