Summary
This study reports the development of a biostimulant derived from orange carrot cell cultures, enriched in phytosterols and phenolic compounds, and its capacity to improve broccoli seed germination under salt stress conditions. The biostimulant reduced hydrogen peroxide accumulation, lowered oxidative stress damage (11% reduction in MDA), and modulated the hormonal and proteomic stress response, thereby enhancing seed vigour and germination efficiency. The findings suggest potential commercial application of plant cell culture-derived biostimulants to support crop establishment in saline soils.
Regional applicability
Soil salinization affects marginal and irrigated agricultural land globally. The approach would be relevant to United Kingdom horticulture where saline conditions occur in some coastal and greenhouse-grown systems, though salt stress is not a primary constraint in most UK field conditions.
Key measures
Seed germination and vitality; H₂O₂ accumulation; malondialdehyde (MDA); oxidative stress-induced damage; stress-related hormones; antioxidant enzyme accumulation; proteomic profile
Outcomes reported
The study evaluated the effect of an orange carrot cell culture-derived biostimulant (OCB) on broccoli seed germination under salt stress conditions, measuring germination rates, seed vitality, oxidative stress markers (H₂O₂, MDA), and hormonal and proteomic profiles.
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