Quantitative Structure-Activity Relationship of Humic-Like Biostimulants Derived From Agro-Industrial Byproducts and Energy Crops

Frontiers in Plant Science
Davide SavyAlessandro Piccolo

Abstract

Humic-like substances (HLSs) isolated by alkaline oxidative hydrolysis from lignin-rich agro-industrial residues have been shown to exert biostimulant activity toward maize (Zea mays L.) germination and early growth. The definition of a quantitative structure-activity relationship (QSAR) between HLS and their bioactivity could be useful to predict their biological properties and tailor plant biostimulants for specific agronomic and industrial uses. Here, we created several projection on latent structure (PLS) regression by using published analytical data on the molecular composition of lignin-derived HLS obtained by both 13C-CPMAS-NMR spectra directly on samples and 31P-NMR spectra after derivatization of hydroxyl functions with a P-containing reagent (2-chloro-4,4,5,5-tetramethyl-1,3,2-dioxaphospholane). These spectral data were used to model the effect of HLS on the elongation of primary root, lateral seminal roots, total root apparatus, and coleoptile of maize. The 13C-CPMAS-NMR data suggested that methoxyl and aromatic moieties positively affected plant growth, while the carboxyl/esterified functions showed a negative impact on the overall seedling development. Alkyl C seems to promote Col elongation while concomitantly red...Continue Reading

References

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Feb 29, 2008·Journal of Agricultural and Food Chemistry·Emmanuel Hatzakis, Photis Dais
Nov 12, 2015·Molecules : a Journal of Synthetic Chemistry and Natural Product Chemistry·Davide SavyAlessandro Piccolo
Feb 11, 2016·Scientific Reports·Andrés Calderín GarcíaRicardo Luis Louro Berbara
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Aug 9, 2019·Nature Protocols·Xianzhi MengDimitris S Argyropoulos

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Citations

Sep 10, 2020·Biology·Julia Renata SchneiderGeraldo Chavarria
Mar 7, 2021·Plants·David Jiménez-AriasAndrés A Borges
Mar 9, 2021·Plant Physiology and Biochemistry : PPB·Tadeu Augusto van Tol de CastroAndrés Calderín García
May 1, 2021·Molecules : a Journal of Synthetic Chemistry and Natural Product Chemistry·Serenella NardiOrnella Francioso
Nov 11, 2021·Journal of the Science of Food and Agriculture·Mariavittoria VerrilloAlessandro Piccolo

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Methods Mentioned

BETA
NMR
RIP
size exclusion chromatography

Software Mentioned

WinRhizo Pro
OriginLab
OriginPro
MestReC NMR

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