Chitosan Microparticles Mitigate N Deficiency in Tomato Plants

18 Pages Posted: 24 Jun 2022

See all articles by Silvana Lorena Colman

Silvana Lorena Colman

affiliation not provided to SSRN

María Florencia Salcedo

affiliation not provided to SSRN

Noelia Pamela Foresi

affiliation not provided to SSRN

María José Iglesias

affiliation not provided to SSRN

Vera Alejandra Alvarez

affiliation not provided to SSRN

Claudia Anahí Casalongué

affiliation not provided to SSRN

Abstract

One of the major agricultural concerns is enhance plant productivity linked with the minimum environmental damage. In this work, we studied the action of chitosan microparticles (CS-MP) in tomato plantlets grown under nutritional nitrogen (N) deficiency. For that, plantlets were grown in deficient medium (DM), supplemented or not with CS-MP. We demonstrated that CS-MP supplementation restored root growth parameters and enhanced level of chlorophyll in 26-day old tomato plantlets grown under DM. These same plantlets increased their height and aerial biomass. Since new strategies are urgently needed to improve soil nutritional acquisition, we explored the action of CS-MP in earlier stage of root development. In 5-day old plantlets, CS-MP modified root system enhancing the number of lateral roots (LR) and modulating LR elongation with a tendency to resemble the length of control roots. In order to decipher the mode of action, the level of nitric oxide (NO) and associated parameters to N metabolism were measured. In young roots from CS-MP supplemented plantlets enhanced level of endogenous NO and an increase in free amino acids and nitrate (NO 3 ) levels were measured. These findings allowed us to suggest that CS-MP may ameliorate N-mediated deficiency by modulating in part, nitrosative species and also triggering the expression of N-related genes. Nevertheless, we discussed about putative mechanisms by which CS-MP may also mold root system and plant development. Furthermore, we proposed that the application of CS-based particles may be a promissory alternative to provide biofertilization in plant crops growing in N impoverished soils.

Keywords: Chitosan microparticles, nitrogen deficiency, Solanum lycopersicum

Suggested Citation

Colman, Silvana Lorena and Salcedo, María Florencia and Foresi, Noelia Pamela and Iglesias, María José and Alvarez, Vera Alejandra and Casalongué, Claudia Anahí, Chitosan Microparticles Mitigate N Deficiency in Tomato Plants. Available at SSRN: https://ssrn.com/abstract=4145709

Silvana Lorena Colman (Contact Author)

affiliation not provided to SSRN ( email )

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María Florencia Salcedo

affiliation not provided to SSRN ( email )

No Address Available

Noelia Pamela Foresi

affiliation not provided to SSRN ( email )

No Address Available

María José Iglesias

affiliation not provided to SSRN ( email )

No Address Available

Vera Alejandra Alvarez

affiliation not provided to SSRN ( email )

No Address Available

Claudia Anahí Casalongué

affiliation not provided to SSRN ( email )

No Address Available

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