Comparison of plant biostimulating properties of Chlorella sorokiniana biomass produced in batch and semi-continuous systems supplemented with pig manure or acetate

Copyright © 2024 The Authors. Published by Elsevier B.V. All rights reserved..

Microalgae-derived biostimulants provide an eco-friendly biotechnology for improving crop productivity. The strategy of circular economy includes reducing biomass production costs of new and robust microalgae strains grown in nutrient-rich wastewater and mixotrophic culture where media is enriched with organic carbon. In this study, Chlorella sorokiniana was grown in 100 l bioreactors under sub-optimal conditions in a greenhouse. A combination of batch and semi-continuous cultivation was used to investigate the growth, plant hormone and biostimulating effect of biomass grown in diluted pig manure and in nutrient medium supplemented with Na-acetate. C. sorokiniana tolerated the low light (sum of PAR 0.99 ± 0.18 mol/photons/(m2/day)) and temperature (3.7-23.7° C) conditions to maintain a positive growth rate and daily biomass productivity (up to 149 mg/l/day and 69 mg/l/day dry matter production in pig manure and Na-acetate supplemented cultures respectively). The protein and lipid content was significantly higher in the biomass generated in batch culture and dilute pig manure (1.4x higher protein and 2x higher lipid) compared to the Na-acetate enriched culture. Auxins indole-3-acetic acid (IAA) and 2-oxindole-3-acetic acid (oxIAA) and salicylic acid (SA) were present in the biomass with significantly higher auxin content in the biomass generated using pig manure (> 350 pmol/g DW IAA and > 84 pmol/g DW oxIAA) compared to cultures enriched with Na-acetate and batch cultures (< 200 pmol/g DW IAA and < 27 pmol/g DW oxIAA). No abscisic acid and jasmonates were detected. All samples had plant biostimulating activity measured in the mungbean rooting bioassay with the Na-acetate supplemented biomass eliciting higher rooting activity (equivalent to 1-2 mg/l IBA) compared to the pig manure (equivalent to 0.5-1 mg/l IBA) and batch culture (equivalent to water control) generated biomass. Thus C. sorokiniana MACC-728 is a robust new strain for biotechnology, tolerating low light and temperature conditions. The strain can adapt to alternative nutrient (pig manure) and carbon (acetate) sources with the generated biomass having a high auxin concentration and plant biostimulating activity detected with the mungbean rooting bioassay.

Medienart:

E-Artikel

Erscheinungsjahr:

2024

Erschienen:

2024

Enthalten in:

Zur Gesamtaufnahme - volume:381

Enthalten in:

Journal of biotechnology - 381(2024) vom: 10. Feb., Seite 27-35

Sprache:

Englisch

Beteiligte Personen:

Stirk, Wendy A [VerfasserIn]
Bálint, Péter [VerfasserIn]
Široká, Jitka [VerfasserIn]
Novák, Ondřej [VerfasserIn]
Rétfalvi, Tamás [VerfasserIn]
Berzsenyi, Zoltán [VerfasserIn]
Notterpek, Jácint [VerfasserIn]
Varga, Zoltán [VerfasserIn]
Maróti, Gergely [VerfasserIn]
van Staden, Johannes [VerfasserIn]
Strnad, Miroslav [VerfasserIn]
Ördög, Vince [VerfasserIn]

Links:

Volltext

Themen:

7440-44-0
Acetic Acid
Auxin
Carbon
Indoleacetic Acids
Journal Article
Low light
Low temperature
Manure
Proteins
Q40Q9N063P
Rooting activity
Salicylic acid

Anmerkungen:

Date Completed 05.02.2024

Date Revised 05.02.2024

published: Print-Electronic

Citation Status MEDLINE

doi:

10.1016/j.jbiotec.2024.01.002

funding:

Förderinstitution / Projekttitel:

PPN (Katalog-ID):

NLM366814478