Effects of ambient temperature in association with photoperiod on phenology and on the expressions of major plant developmental genes in wheat (Triticum aestivum L.)

• DOI: 10.1111/pce.12971
• Publication Date: 2017-04-20T15:37:00Z
• Authors: Tibor Kiss; Laura E. Dixon; Alexandra Soltész; Judit Bányai; Marianna Mayer; Krisztina Balla; Vincent Allard; Gábor Galiba; Gustavo A. Slafer; Simon Griffiths; Ottó Veisz; Ildikó Karsai
• Keywords: Vernalization; Main stem

In addition to its role in vernalization, temperature is an important environmental stimulus determining plant growth and development. We used factorial combinations of two photoperiods (16H, 12H) three levels (11, 18 25 °C) study the responses 19 wheat cultivars with established genetic relationships. Temperature produced more significant effects on development than photoperiod, strong genotypic components. Wheat genotypes PPD-D1 photoperiod sensitive allele were temperature; their was delayed by higher temperature, which intensified under non-inductive conditions. The effect not proportional; it influenced stem elongation largest extent, warmer lengthened lag phase between detection first node beginning intensive elongation. gene expression patterns VRN1, VRN2 PPD1 also significantly modified while VRN3 chronologically regulated. associations VRN1 early apex all treatments but only for later developmental phases optimal conditions (16H °C). Under 16H, magnitude transient peak observed at °C associated phases.