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JHI St WM daylength

ABSTRACT: Recent advances have defined some of the components of photoperiodic signalling that lead to tuberisation in potato including orthologues of FLOWERING LOCUS T (StSP6A) and CYCLING DOF FACTOR (StCDF1). The aim of the current study is to investigate the molecular basis of permissive tuber initiation under long days in Solanum tuberosum Neo-Tuberosum by comparative analysis with an obligate short day Solanum tuberosum ssp. Andigena accession. We show that the Neo-Tuberosum accession, but not the Andigena, contains alleles that encode StCDF1 proteins modified in the C-terminal region, likely to evade long day inhibition of StSP6A expression. We also identify an allele of StSP6A from the Neo-Tuberosum accession, absent in the Andigena, which is expressed under long days. Other leaf transcripts and metabolites that show different abundances in tuberising and non-tuberising samples were identified adding detail to tuberisation-associated processes. Overall, the data presented in this study highlight the subtle interplay between components of the clock-CONSTANS-StSP6A axis which collectively may interact to fine-tune the timing of tuberisation.

ORGANISM(S): Solanum tuberosum

SUBMITTER: Pete Hedley

PROVIDER: E-MTAB-1799 | biostudies-arrayexpress |

REPOSITORIES: biostudies-arrayexpress

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