Novák Aliz, Boldizsár Ákos, Ádám Éva, Kozma-Bognár László, Majláth Imre, Båga Monica, Tóth Balázs, Chibbar Ravindra, Galiba Gábor
Agricultural Institute, Centre for Agricultural Research, Hungarian Academy of Sciences, 2462 Martonvásár, Hungary Doctoral School of Molecular- and Nanotechnologies, Research Institute of Chemical and Process Engineering, Faculty of Information Technology, University of Pannonia, 8200 Veszprém, Hungary.
Agricultural Institute, Centre for Agricultural Research, Hungarian Academy of Sciences, 2462 Martonvásár, Hungary.
J Exp Bot. 2016 Mar;67(5):1285-95. doi: 10.1093/jxb/erv526. Epub 2015 Dec 27.
C-repeat binding factor 14 (CBF14) is a plant transcription factor that regulates a set of cold-induced genes, contributing to enhanced frost tolerance during cold acclimation. Many CBF genes are induced by cool temperatures and regulated by day length and light quality, which affect the amount of accumulated freezing tolerance. Here we show that a low red to far-red ratio in white light enhances CBF14 expression and increases frost tolerance at 15°C in winter Triticum aesitivum and Hordeum vulgare genotypes, but not in T. monococcum (einkorn), which has a relatively low freezing tolerance. Low red to far-red ratio enhances the expression of PHYA in all three species, but induces PHYB expression only in einkorn. Based on our results, a model is proposed to illustrate the supposed positive effect of phytochrome A and the negative influence of phytochrome B on the enhancement of freezing tolerance in cereals in response to spectral changes of incident light.
CBF-regulon, barley, cereals, cold acclimation, freezing tolerance, light regulation, low red/far-red ratio, phytochrome, wheat.
C-重复结合因子14（CBF14）是一种植物转录因子，可调节一组冷诱导基因，有助于在冷驯化过程中增强抗冻性。许多CBF基因受低温诱导，并受日长和光质调控，这些因素会影响累积的抗冻能力。我们发现，在冬小麦和大麦基因型中，白光下低红/远红比例会增强CBF14表达，并提高15°C时的抗冻性，但在抗冻性相对较低的一粒小麦（ Einkorn）中则不然。低红/远红比例在这三个物种中均增强了PHYA表达，但仅在一粒小麦中诱导了PHYB表达。基于我们的结果，提出了一个模型来说明光敏色素A的假定积极作用和光敏色素B对谷物响应入射光光谱变化增强抗冻性的负面影响。
CBF调节子、大麦、谷物、冷驯化、抗冻性、光调节、低红/远红比例、光敏色素、小麦
