Andrew Harner, Jr.

Andrew Harner, Jr.

  • Ph.D. Candidate, Horticulture
  • Adviser: Dr. Michela Centinari
107 Tyson Building
University Park, PA 16802

Areas of Expertise

  • Applied viticulture
  • Aromatic secondary metabolites in grapes


  • Ph.D. Candidate, Horticulture 2019-Present
  • M.S. Horticulture, Penn State University, 2019
  • B.S. Plant Science, Viticulture & Enology, English minor, Cornell University, 2016

My research primarily aims to explore applied wine grape aroma physiology, and the ranges of influence that environmental conditions may have on the biosynthesis and accumulation of aroma compounds within grape berries. Previous work has focused on the sesquiterpenoid rotundone in the red-fruited variety Noiret, and specifically detailing meso- and microclimatic influence on its accumulation in order to assist winegrowers with predicting final grape rotundone concentrations and the potential 'pepperiness' of Noiret wines. 

Recent projects involve working alongside commercial PA winegrowers and with the Austrian white grape Grüner Veltliner, and seeks to assess the regionality and typicity of Pennsylvania-grown Grüner Veltliner grapes and wines and whether these traits are associated with vineyard-scale weather patterns. Through this work and future, planned projects investigating microclimatic influence in an applied context, I hope to contribute to the understanding of how grape composition is partially regulated by the immediate environment and ultimately translate this knowledge into management recommendations for local winegrowers.