What does this research mean for the field?

Chitosan-based seed coatings incorporating glycerol and either gibberellic acid or proline-betaine significantly accelerate germination kinetics and enhance seedling biomass in Trifoliate orange. Novelty: ClaimNovelty.INCREMENTAL. Consensus alignment: ConsensusAlignment.NEUTRAL.

What question did this study set out to answer?

To evaluate the efficacy of chitosan-based coating formulations combined with glycerol, amino acids (betaine-proline), or gibberellic acid (GA3) in enhancing germination kinetics and seedling vigor in trifoliate orange.

August 22, 2026SeedsOpen Access

Germination and Growth Responses of Trifoliate Orange (Poncirus trifoliata L.) Seeds to Glycerol-Chitosan-Based Biostimulant Treatments

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To evaluate the efficacy of chitosan-based coating formulations combined with glycerol, amino acids (betaine-proline), or gibberellic acid (GA3) in enhancing germination kinetics and seedling vigor in trifoliate orange.
Tested 18 distinct seed-coating treatments combining varying concentrations of chitosan (1.5–2%), glycerol, gibberellic acid (GA3), and betaine-proline.
Assessed germination kinetics, shoot elongation, and biomass allocation across both Petri dish and soil bioassays using seeds from mature fruits.
In soil assays, formulations combining 1.5–2% chitosan with GA3 accelerated germination speed by 3.0 to 3.4 times relative to control, while 1.5% chitosan with proline-betaine and glycerol delivered the fastest overall germination.
Formulation choice altered biomass partitioning: 2% chitosan with GA3 maximized shoot and total dry weight, whereas 2% chitosan with proline-betaine and glycerol substantially increased root dry biomass.
Glycerol incorporation produced context-dependent outcomes, enhancing the performance of amino acid formulations while diminishing the efficacy of GA3 mixtures.

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Implication

Experimental study demonstrates enhanced germination kinetics and seedling biomass in trifoliate orange, indicating seed coatings improve rootstock propagation.

Cite This Study

Ntouvika et al. (2026) studied this question.

synapsesocial.com/papers/6a895ed9ca7ade938187d11e https://doi.org/10.3390/seeds5040050

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Implication

Experimental study demonstrates enhanced germination kinetics and seedling biomass in trifoliate orange, indicating seed coatings improve rootstock propagation.

Germination and Growth Responses of Trifoliate Orange (Poncirus trifoliata L.) Seeds to Glycerol-Chitosan-Based Biostimulant Treatments

Key Points

Discussion

Implication

Cite This Study

Germination and Growth Responses of Trifoliate Orange (Poncirus trifoliata L.) Seeds to Glycerol-Chitosan-Based Biostimulant Treatments

Key Points

Discussion

Implication

Cite This Study

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