Publications by authors named "Andrea K Knox"
Article Synopsis
- Long exposures to nonfreezing cold temperatures help winter wheat and barley flower faster and become more freezing-tolerant, but reproductive development reduces freezing tolerance.
- The study used mvp mutant wheat plants to examine the role of the VRN-1 gene, finding that plants without functional VRN-1 do not flower and have better freezing tolerance compared to those that do.
- Results suggest that VRN-1 activates a regulatory process that influences cold acclimation and that genetic variations in VRN-1 affect freezing tolerance, potentially linking it to previously identified quantitative trait loci for freezing resistance.
Frost Resistance-1 (FR-1) and FR-2 are two loci affecting freezing tolerance and winter hardiness of the temperate-climate cereals. FR-1 is hypothesized to be due to the pleiotropic effects of VRN-1. FR-2 spans a cluster of C-Repeat Binding Factor (CBF) genes.
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- Researchers identified a cluster of eleven CBF genes linked to frost resistance on chromosome 5 of diploid wheat by studying the cross between frost-tolerant G3116 and frost-sensitive DV92.
- The strongest frost tolerance was associated with specific genes (TmCBF12, TmCBF14, and TmCBF15) from the G3116 allele, which resulted in higher expression of cold-induced genes compared to DV92.
- The non-functional TmCBF12 protein in DV92, which can't bind essential DNA motifs for cold response, contributes to its lower frost tolerance.