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SUMMARY:From Duckweed Stress Physiology to D-Amino Acid Signaling: Insight
 s Across Biological Kingdoms
DTSTART;VALUE=DATE-TIME:20260929T071500Z
DTEND;VALUE=DATE-TIME:20260929T073000Z
DTSTAMP;VALUE=DATE-TIME:20260915T223955Z
UID:indico-contribution-2892@cern.ch
DESCRIPTION:Speakers: Dr Edna Ben-Izhak Monselise (Ben Gurion Univercity)\
 nEdna Ben-Izhak Monselise*\nDepartment of Life Science\, Bergmann Campus\,
  Ben-Gurion University of the Negev\, Beer-Sheva 8441901\, Israel\nbened@p
 ost.bgu.ac.il\nCellular stress responses involve extensive metabolic repro
 gramming. While alterations in amino acid concentrations under stress have
  been widely documented\, the potential role of amino acid chirality in st
 ress adaptation remains poorly understood.\nUsing 15N NMR spectroscopy\, s
 tress-dependent changes in amino acid profiles were investigated in aquati
 c plant systems\, *Landoltia punctata*. These studies revealed the appeara
 nce of D-alanine under defined stress conditions (Monselise et al.\, 2015)
 \, providing evidence for stress-associated D-alanine accumulation in duck
 weed and suggesting that stereochemical remodeling may represent a compone
 nt of the plant stress response.\nSubsequent studies in *Escherichia coli*
  demonstrated stress-associated production and extracellular release of D-
 glutamate (Monselise\, 2019\; Monselise 2024). The release of D-glutamate 
 into the surrounding medium suggests that stress-induced D-amino acids may
  function beyond intracellular metabolism and participate in intercellular
  biochemical communication.\nTaken together\, these observations from both
  plant and bacterial systems raise the possibility that D-amino acids cons
 titute conserved elements of stress-response networks across biological ki
 ngdoms. These findings support a broader conceptual framework in which str
 ess-induced stereochemical changes contribute to cellular adaptation and s
 ignaling.\nThe presentation will discuss the evolution of this research\, 
 from duckweed stress physiology to broader questions concerning the role o
 f D-amino acids in cellular stress responses and their possible relevance 
 to the early stages of cellular dysfunction.\n\nhttps://indico.unina.it/ev
 ent/117/contributions/2892/
LOCATION:Department of Agricultural Sciences of the University of Napoli F
 ederico II\, Portici\, Italy Sala Cinese
URL:https://indico.unina.it/event/117/contributions/2892/
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