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DTSTART:20260329T030000
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DTSTAMP:20260424T063006Z
UID:1770710400@ist.ac.at
DTSTART:20260210T090000
DTEND:20260210T100000
DESCRIPTION:Speaker: Stefan Riegler\nhosted by Beatriz Vicoso\nAbstract: Du
 e to their sessile nature\, plants have evolved astounding developmental p
 lasticity\, which allows them to respond to environmental fluctuations by 
 adapting their growth and architecture. This adaptability is the result of
  the interplay between numerous hormonal and nutrient-sensing processes. B
 y adjusting their internal signaling pathways\, plants can optimise their 
 resource acquisition and defense strategies\, ensuring their survival and 
 productivity in diverse habitats.The first part of this work is centered o
 n the gene SYNERGISTIC ON AUXIN AND CYTOKININ1 (AtSYAC1) in Arabidopsis th
 aliana. Despite often antagonistic interactions between auxin and cytokini
 n\, AtSYAC1 exhibits a massive\, non-additive induction upon simultaneous 
 exogenous hormone treatment. This research identifies the first biological
 ly relevant context that induces AtSYAC1 expression in roots\, specificall
 y\, phosphate starvation and plant-fungal interaction. We proceed to inves
 tigate the spatiotemporal expression patterns and cellular localization of
  AtSYAC1 in response to these cues\, discovering its specific induction in
  root hair cells and its potential role in root hair tip growth. By invest
 igating the plant-fungal relationship we highlight the high environmental 
 sensitivity of such interactions.The second part of this thesis\, as part 
 of the Horizon Europe BOLERO project\, addresses the development of resili
 ent coffee rootstocks to support sustainable\, lowinput farming systems. U
 sing high-throughput phenotyping and transcriptomic analyses\, the study e
 valuates the root system plasticity of cultivated and wild Coffea species 
 under contrasting nitrogen supply. We identify the molecular basis of high
  root system plasticity in C. canephora and C. congensis\, and observe a c
 urious response to low nitrogen availability in C. brevipes. Furthermore\,
  physiological and hormonal profiling of grafted plants identifies promisi
 ng rootstock-scion combinations and provides a molecular and phenotypic fo
 undation for breeding Coffea varieties with enhanced nutrient-use efficien
 cy and environmental resilience. 
LOCATION:Zoom\, ISTA
ORGANIZER:
SUMMARY:Stefan Riegler: Thesis Defense: Root System Plasticity under Nutrie
 nt Limitation: Investigating Hormonal and Molecular Drivers in Arabidopsis
  thaliana and Coffea species
URL:https://talks-calendar.ista.ac.at/events/6254
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