English (United Kingdom)

https://curated-unify.zendy.io/wp-json/zendy-region/v1/featured_content/oa?rat=en

https://curated-unify.zendy.io/wp-json/zendy-region/v1/highlighted_journal/

Global: Zendy Plus annual

Presents the access of premium content as premium feature

Premium Content

Presents the keyphrase highlighting as premium feature

Keyphrase Highlighting

Presents the summarisation as premium feature

Summarisation

Insights

Presents the pdf analysis as premium feature

PDF Analysis

Presents the zaia usage as premium feature

ZAIA

Global: Zendy Tools annual

Global: Zendy Free Plan

Global: Zendy Tools monthly

Global: Zendy Plus monthly

Background  Plants must integrate complex signals from environmental and endogenous cues to fine-tune the timing of flowering. Low temperature is one of the most common environmental stresses that affect flowering time; however, molecular mechanisms underlying the cold temperature regulation of flowering time are not fully understood.    Methodology/Principal Findings  We report the identification of a novel regulator,  LONG VEGETATIVE PHASE 1  ( LOV1 ), that controls flowering time and cold response. An  Arabidopsis  mutant,   lo ng   v   egetative phase  1-1D  (lov1-1D ) showing the late-flowering phenotype, was isolated by activation tagging screening. Subsequent analyses demonstrated that the phenotype of the mutant resulted from the overexpression of a NAC-domain protein gene ( At2g02450 ). Both gain- and loss-of-function alleles of  LOV1  affected flowering time predominantly under long-day but not short-day conditions, suggesting that  LOV1  may act within the photoperiod pathway. The expression of  CONSTANS (CO) , a floral promoter, was affected by  LOV1  level, suggesting that  LOV1  controls flowering time by negatively regulating  CO  expression. The epistatic relationship between  CO  and  LOV1  was consistent with this proposed regulatory pathway. Physiological analyses to elucidate upstream signalling pathways revealed that  LOV1  regulates the cold response in plants. Loss of  LOV1  function resulted in hypersensitivity to cold temperature, whereas a gain-of-function allele conferred cold tolerance. The freezing tolerance was accompanied by upregulation of cold response genes,  COLD-REGULATED 15A  ( COR15A ) and  COLD INDUCED 1  ( KIN1 ) without affecting expression of the C-repeat-binding factor/dehydration responsive element-binding factor 1 ( CBF/DREB1 ) family of genes.    Conclusions  Our study shows that  LOV1  functions as a floral repressor that negatively regulates  CO  expression under long-day conditions and acts as a common regulator of two intersecting pathways that regulate flowering time and the cold response, respectively. Our results suggest an overlapping pathway for controlling cold stress response and flowering time in plants.

Control of Flowering Time and Cold Response by a NAC-Domain Protein in Arabidopsis