Seed vernalization and gibberellic acid interact to affect life cycle type in facultative winter annual Canadian horseweed (Erigeron canadensis)
Authors: Waterman, R., Catlett, B., Bhatt, I., Edmonds, G., Conner, J. K.
Date: 2026-01-09 · Version: 2
DOI: 10.1101/2025.10.06.680458 Category: Plant Biology
Model Organism: Erigeron canadensis
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The study examined how genetic variation, parental life cycle, temperature, light, and gibberellic acid (GA) influence phenological plasticity in the facultative winter annual weed Erigeron canadensis. Seed vernalization and GA application promoted summer‑annual traits, supporting a GA‑mediated mechanism for cold‑induced life‑cycle shifts, while light had little effect and genetic variation accounted for less phenotypic variance than plastic responses. The findings highlight variability in GA‑mediated vernalization effects and call for further investigation.
phenology vernalization gibberellic acid plasticity Erigeron canadensis