AI Article Synopsis

  • Some potato species need a short-day photoperiod for tuberization, which is negatively impacted by gibberellins (GAs).
  • Researchers isolated the StGA3ox2 gene, involved in GA metabolism, showing increased expression in the aerial parts and repression in stolons under short-day conditions.
  • Over-expressing StGA3ox2 led to taller plants that tuberized earlier in short days, while over-expressing it specifically in tubers resulted in shorter plants with slightly delayed tuber induction, indicating its role in tuberization timing for these potato plants.

Article Abstract

Some potato species require a short-day (SD) photoperiod for tuberization, a process that is negatively affected by gibberellins (GAs). Here we report the isolation of StGA3ox2, a gene encoding a GA 3-oxidase, whose expression is increased in the aerial parts and is repressed in the stolons after transfer of photoperiod-dependent potato plants to SD conditions. Over-expression of StGA3ox2 under control of constitutive or leaf-specific promoters results in taller plants which, in contrast to StGA20ox1 over-expressers previously reported, tuberize earlier under SD conditions than the controls. By contrast, StGA3ox2 tuber-specific over-expression results in non-elongated plants with slightly delayed tuber induction. Together, our experiments support that StGA3ox2 expression and gibberellin metabolism significantly contribute to the tuberization time in strictly photoperiod-dependent potato plants.

Download full-text PDF

Source
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC3178525PMC
http://journals.plos.org/plosone/article?id=10.1371/journal.pone.0024458PLOS

Publication Analysis

Top Keywords

gibberellin metabolism
8
photoperiod-dependent potato
8
potato plants
8
metabolism contributes
4
contributes control
4
control photoperiod-mediated
4
photoperiod-mediated tuberization
4
potato
4
tuberization potato
4
potato potato
4

Similar Publications

Want AI Summaries of new PubMed Abstracts delivered to your In-box?

Enter search terms and have AI summaries delivered each week - change queries or unsubscribe any time!