Priming with Small Molecule-Based Biostimulants to Improve Abiotic Stress Tolerance in Arabidopsis thaliana

Biostimulants became a hotspot in the fight to alleviate the consequences of abiotic stresses in crops. Due to their complex nature, it is challenging to obtain stable and reproducible final products and more challenging to define their mechanism of action. As an alternative, small molecule-based bi...

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Bibliographic Details
Published in:Plants (Basel) 2022-05, Vol.11 (10), p.1287
Main Authors: Hernándiz, Alba E, Aucique-Perez, Carlos Eduardo, Ćavar Zeljković, Sanja, Štefelová, Nikola, Salcedo Sarmiento, Sara, Spíchal, Lukáš, De Diego, Nuria
Format: Article
Language:English
Subjects:
Abiotic stress
Agricultural production
Amino acids
biostimulant
Conjugation
Drought
Food security
Genetically altered foods
growth
Growth conditions
International organizations
Metabolism
Metabolites
Ornithine
Plant growth
plant phenotyping
Polyamines
Priming
Putrescine
Rain
Salinity
Salt
Seedlings
Seeds
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Summary:Biostimulants became a hotspot in the fight to alleviate the consequences of abiotic stresses in crops. Due to their complex nature, it is challenging to obtain stable and reproducible final products and more challenging to define their mechanism of action. As an alternative, small molecule-based biostimulants, such as polyamines have promoted plant growth and improved stress tolerance. However, profound research about their mechanisms of action is still missing. To go further, we tested the effect of putrescine (Put) and its precursor ornithine (Orn) and degradation product 1,3-diaminopropane (DAP) at two different concentrations (0.1 and 1 mM) as a seed priming on in vitro Arabidopsis seedlings grown under optimal growth conditions, osmotic or salt stress. None of the primings affected the growth of the seedlings in optimal conditions but altered the metabolism of the plants. Under stress conditions, almost all primed plants grew better and improved their greenness. Only Orn-primed plants showed different plant responses. Interestingly, the metabolic analysis revealed the implication of the N- acetylornithine and Orn and polyamine conjugation as the leading player regulating growth and development under control and stress conditions. We corroborated polyamines as very powerful small molecule-based biostimulants to alleviate the adverse abiotic stress effects.
ISSN:2223-7747
2223-7747
DOI:10.3390/plants11101287