Plant physiology/biochemistry

November 22, 2013 / By: Amy S. Verhoeven, Ph.D.

Professional Interests

I am a plant physiologist/ biochemist with interests in how plants acclimate and adapt to stressful environments.  I am particularly interested in photosynthesis and photoprotective strategies that plants use in times of stress.  A major research focus has been on low temperature stress, and the questions I have been asking center on how plants deal with high light intensities during winter, when photosynthesis is limited.  My projects have centered on leaf antioxidant systems, a photoprotective process called the xanthophyll cycle, and an examination of how the photosynthetic light harvesting proteins change during acclimation to winter conditions, and upon recovery in the spring.  I am also interested in how plants acclimate to a variety of light conditions, particularly with regard to their complement of photosynthetic proteins.

Publications & Presentations

Names of student researchers are in bold.

 

  • Dudley L, Hove A, Emms SK, Verhoeven AS, Mazer S.  (2015) Seasonal changes in physiological performance in wild Clarkia populations.  Implications for the evolution of a compressed life cycle and self fertilization in C. xantianaAmerican Journal of Botany (In Press)
  • Moy A, Le S, Verhoeven AS.  (2015) Different strategies for photoprotection during autumn senescence in maple and oak. Physiologia Plantarum  (In Press)
  • Verhoeven AS (2014)  Sustained energy dissipation in winter evergreens.  New Phytologist.  201: 57-6 
  • Verhoeven AS (2013) Recovery kinetics of photochemical efficiency in winter stressed conifers:  the effects of growth light environment, extent of the season and species.  Physiologia Plantarum. 147: 147-158
  • Mazer SJ, Dudley LS, Hove AA, Emms SK, Verhoeven AS (2010) Physiological Performance in Clarkia Sister Taxa with Contrasting Mating Systems: Do Early-Flowering Autogamous Taxa Avoid Water Stress Relative to Their Pollinator-Dependent Counterparts? International Journal of Plant Sciences 171: 1029
  • Verhoeven A., Osmolak A., Morales P., Crow J., (2009)  Seasonal changes in abundance and phosphorylation status of photosynthetic proteins in eastern white pine and balsam fir.  Tree Physiology 29:362-374
  • Savage J.A., Cavender-Bares J., Verhoeven A., (2009)  Willow species (genus: Salix) with contrasting habitat affinities differ in their photoprotective responses to water stress.  Functional Plant Biology 36:300-309
  • Verhoeven AS, Swanberg A, Thao M,  Whiteman J (2005)  Seasonal changes in leaf antioxidant systems and xanthophyll cycle characteristics in Taxus x media growing in sun and shade environments.  Physiologia Plantarum 123:428-434
  • Bachman KM, Ebbert B, Adams WWIII, Verhoeven AS, Logan BA, Demmig-Adams B (2004) Effects of lincomycin on PSII efficiency, non-photochemical quenching, D1 protein and xanthophyll cycle during photoinhibition and recovery.  Functional Plant Biology 31(8):803-813
  • Barker DH, Adams WWIII, Demmig-Adams B, Logan BA, Verhoeven AS, Smith SD (2002)  Nocturnally retained zeaxanthin does not remain engaged in a state primed for energy dissipation during the summer in two Yucca species growing in the Mojave Desert.  Plant Cell and Environment   25: 95-103
  • Hieber DA, Bugos RC, Verhoeven AS, Yamamoto HY (2002)  Overexpression of violaxanthin de-epoxidase:  properties of C-terminal deletions on activity and pH dependent lipid binding.   Planta  214:476-483
  • Verhoeven AS, Bugos B, Yamamoto H (2001)  Transgenic tobacco with suppressed zeaxanthin formation is susceptible to stress-induced photoinhibition.  Photosynthesis Research  67:27-39.
  • Sun W-H, Verhoeven AS, Bugos RC, Yamamoto HY (2001) Suppression of zeaxanthin formation does not reduce photosynthesis and growth of transgenic tobacco plants under field conditions.  Photosynthesis Research 67:41-50.
  • Verhoeven AS, Adams WWIII, Demmig-Adams B, Croce R, Bassi R  (1999) Xanthophyll cycle pigment localization and dynamics during exposure to low temperatures and light stress in Vinca majorPlant Physiology 120:727-734.
  • Verhoeven AS, Adams WWIII, Demmig-Adams B  (1999) The xanthophyll cycle and acclimation of Pinus ponderosa and Malva neglecta to winter stress. Oecologia 118: 277-287
  • Verhoeven AS, Adams WWIII, Demmig-Adams B  (1998) Photoinhibition during winter stress in sun and shade Euonymus kiautschovicus leaves; the xanthophyll cycle and leaf adenylate status. Plant Cell and Environment  21: 893-903
  • Verhoeven AS, Demmig-Adams B, Adams WWIII (1997) Enhanced employment of the xanthophyll cycle and thermal energy dissipation in spinach exposed to high light and N stress.  Plant Physiology  113: 817-824.
  • Verhoeven AS, Adams WWIII, Demmig-Adams B (1996)  Close relationship between the state of the xanthophyll cycle pigments and photosystem II efficiency during recovery from winter stress.  Physiologia Plantarum 96:567-576.
  • Demmig-Adams B, Adams WW III, Barker DH, Logan BA, Bowling DR & Verhoeven AS  (1996) Using chlorophyll fluorescence to assess the allocation of absorbed light to thermal dissipation of excess excitation.  Physiologia Plantarum.  98: 253-264.
  • Shea MA, Verhoeven AS, Pedigo S (1996) Calcium-induced interactions of calmodulin domains revealed by quantitative thrombin footprinting of Arg37 and Arg106.  Biochemistry 35: 2943
  • Adams WW III, Demmig-Adams B, Verhoeven AS, Barker DH (1994)  'Photoinhibition' during winter stress: Involvement of sustained xanthophyll cycle-associated energy dissipation.  Australian Journal of Plant Physiology  22: 261-267.
  • Demmig-Adams B, Logan BA, Verhoeven AS & Adams WW III (1995) Xanthophyll cycle-dependent energy dissipation and flexible PSII efficiency in plants acclimated to light stress.  Australian Journal of Plant Physiology  22: 249-260.

 
 
Student Presentations at National or Regional Meetings
 

  • Frebault J and A Verhoeven (2015)  "Protein changes associated with rapid winter recovery in White Pine (Pinus strobus) and White Spruce (Picea glauca) during early winter conditions"Annual Meeting of the Minnesota Academy of Science, Winchell Undergraduate Symposium, University of Northwestern, ST. Paul, MN, April 2015 (Poster Presentation) 
  • Jerrard J and A Verhoeven (2015)  "Status of thylakoid protein phosphorylation in summer-state conifers versus winter-stressed conifers in varying growth light environments."  Annual Meeting of the Minnesota Academy of Science, Winchell Undergraduate Symposium, University of Northwestern, ST. Paul, MN, April 2015 (Poster Presentation)
  • Merry R, Frebault J, and A. Verhoeven (2014)  “Kinetics of recovery from winter stress in eastern white pine (Pinus strobus) and white spruce (Picea glauca).”  Annual Meeting of the  American Society of Plant Biology, Portland, OR, July 2014 (Poster Presentation)
  • Merry R, Frebault J, and A. Verhoeven (2014)  “Kinetics of recovery from winter stress in eastern white pine (Pinus strobus) and white spruce (Picea glauca).”  Annual Meeting of the Minnesota Academy of Science, Winchell Undergraduate Symposium, Saint Mary’s College, Winona, MN, April 2014 (Poster Presentation)
  • Pham J, and A. Verhoeven (2014)  “Does stress induce increases in antioxidant activity in Clarkia Plants?”  Annual Meeting of the Minnesota Academy of Science, Winchell Undergraduate Symposium, Saint Mary’s College, Winona, MN, April 2014 (Poster Presentation)
  • Merry R, and A. Verhoeven (2013)  “Kinetics of recovery from winter stress in eastern white pine (Pinus strobus) and white spruce (Picea glauca).”  Annual Meeting of the Ecological Society of America, Minneapolis, MN, August 2013 (Poster Presentation)
  • Merry R, Edgren K and A. Verhoeven (2013) “The trade-off between photosynthesis and photo-protection”.   Annual Meeting of the Minnesota Academy of Science, Winchell Undergraduate Symposium, Augsburg College, MN, April 2013 (Poster Presentation)
  • Nyugen, M., Kertho A. and A. Verhoeven (2012) “Light dependent regulation of state transitions in gymnosperms compared with angiosperms”.  Annual Meeting of the Ecological Society of America, Portland, OR, August 2012 (Poster Presentation)
  • Moy A. and A. Verhoeven (2011) “Investigating changes in individual light harvesting protein abundance during autumn in leaves of maple and oak.”  Annual Meeting of the American Society of Plant Biology, Minneapolis, MN, August 2012 (Poster Presentation)
  • Kertho A. and A. Verhoeven (2011)  “An examination of light-dependent regulation of state transitions in gymnosperms compared with angiosperms.”  Annual Meeting of the American Society of Plant Biology, Minneapolis, MN, August 2012 (Poster Presentation)
  • Xiong J. and A. Verhoeven (2010)An Ethnopharmacologic Analysis of Herbal Medicines Used by the Hmong Community in Minnesota, 19th Annual National McNair Research Conference and Graduate Fair, Delavan WI, November (Poster Presentation)
  • Hughes K., Kokula A. and A. Verhoeven  (2010) “Antioxidant response of overwintering conifers suggest species specific strategies for coping with excess excitation energy.”  Meeting of the Ecological Society of America, Pittsburgh, PA, August 2010 (Poster Presentation)
  • Hughes, K. Kokula A. and A. Verhoeven (2010) “Antioxidant Activity in Summer versus Winter in Three Species of Conifers.” Minnesota Academy of Science Winchell Undergraduate Symposium
  • Ferry A. and A. Verhoeven (2010) “Investigation of the Light Dependence of State Transitions in Pine in Summer Compared with Winter.” Journal of the Minnesota Academy of Science 73:9 (poster presentation)
  • Crow J. and A. Verhoeven (2009) “Examining light-dependent phosphorylation of light harvesting proteins in Eastern White Pine.”  Journal of the Minnesota Academy of Science 72:5 (poster presentation)
  • Crow, Jordan and Amy Verhoeven (2007)  “Staying green during winter:  Seasonal changes in photosynthetic proteins associated with light harvesting in Pinus strobus and Abies balsamea”. Journal of the Minnesota Academy of Science 70:  8 (poster presentation)
  • Morales Paul C, Tangen Mike S, Verhoeven Amy S (2005)  “Seasonal changes in relative abundance and phosphorylation status of light harvesting and reaction center proteins in Pinus strobus and Abies balsamea.”  American Society of Plant Biology Abstract Supplement, Abstract # 176  (poster presentation)
  • Broeren, Margaret and Amy Verhoeven (2004)  “The role of chlorophyll fluorescence methodology in Fv/Fm recovery from light stress.” Journal of the Minnesota Academy of Science 68:  17 (poster presentation)
  • Farrell, Leigh (2004)  “Method development and study of the winter rearrangement of the photosystems in conifers.” Journal of the Minnesota Academy of Science 68:  19 (poster presentation) 
  • Swanberg A, Whiteman J and Verhoeven A (March 2003) Seasonal changes in photoprotective mechanisms of the evergreen Taxus cuspidata growing in sun and shade environments. Midwest Regional Meeting of American Society of Plant Biologists, Iowa State University, Ames IA (Oral presentation) 
  • Swanberg, Andrea and Amy Verhoeven (2002)  “Seasonal acclimation of leaf antioxidant systems in the evergreen Taxus cuspidata growing in sun vs. shade.” Journal of the Minnesota Academy of Science 66:  30 (poster presentation)
  • Thao, Mai and Amy Verhoeven (2002)  “Seasonal variation in antioxidant activities of APX, GR, and SOD in the evergreen Taxus cuspidate growing under sun and shade.” Journal of the Minnesota Academy of Science 66:  31 (poster presentation)

Undergraduate Admissions

Graduate Admissions

Jobs at UST