Dual functions of the ZmCCT-associated quantitative trait locus in flowering and stress responses under long-day conditions.

摘要: Photoperiodism refers to the ability of plants measure day length determine season. This enables coordinate internal biological activities with external changes ensure normal growth. However, influence photoperiod on maize flowering and stress responses under long-day (LD) conditions has not been analyzed by comparative transcriptome sequencing. The ZmCCT gene was previously identified as a homolog rice response regulator Ghd7, associated major quantitative trait locus (QTL) responsible for Gibberella stalk rot resistance in maize. its regulatory mechanism characterized. We mapped ZmCCT-associated QTL (ZmCCT-AQ), which is approximately 130 kb long regulates drought To investigate effects ZmCCT-AQ LD conditions, transcriptomes photoperiod-insensitive inbred line Huangzao4 (HZ4) near-isogenic (HZ4-NIL) containing were sequenced. A set genes RNA-seq exhibited higher basal expression levels HZ4-NIL than HZ4. These circadian rhythm biotic abiotic stresses. differentially expressed introgressed regions conferred heat tolerance, stronger disease relative Co-expression analysis diurnal rhythms related suggested that one clock core genes, ZmCCA1, are important nodes linking tolerance conditions. Our study revealed influences Additionally, ZmCCA1 functional links between tolerance. establishment this particular molecular link uncovered new relationship plant photoperiodism responses.