Lance S. Evans, Professor of Biology, Manhattan College B.S., California State Polytech University 1967 Ph.D., University of California, Riverside, 1970.

Research Interests:
Plant growth and development from an anatomical perspective. The effects of environmental factors on these anatomical considerations.

Specific Projects:
Injuries of surfaces of long-lived, columnar cacti- the effects of UV-B radiation on surfaces of cacti. In 2002, we measured the health of over 1300 saguaros.

Anatomical basis/mechanical properties of joints of cacti. The overall aim research is to understand relationships between mechanical properties of joints, anatomy of joints, morphology of species and predominant mode of reproduction.

Anatomical basis/mechanical properties of grass stems.

Anatomical considerations of plant foliage to tropospheric ozone levels.

Cell proliferation dynamics of cells in meristems.

Needle and stem anatomy of first-year tissues of high elevation Red Spruce treesin the Adirondack Mountains.

Publications of last several years:

Z. Kahn-Jetter, ___, J. Grazan and C. Frenz. 2000. Compressive/tensile stresses and lignified cells as resistance components in joints between cladodes of Opuntia laevis L. (Cactaceae). International Journal of Plant Science. 161: 447-462

___, 2000. Diversity of cell lengths in terminal portions of roots: Implications to cell proliferation. Environmental and Experimental Botany. 43: 239-251. Erratum: Environ. and Exp. Botany. 44: 165-167.

. ___, Karen Lagrazon, and Jacklyn Pancrudo. 2000. Diversity of cell lengths in terminal portions of roots: location of the proliferate cell population. Environmental and Experimental Botany. 45: 85-94.

Z. Kahn-Jetter, ____, Elvira Liclican and Matthew Pastone. 2001. Compressive/tensile stresses and lignified cells as resistance components in joints between stem segments of Opunia fulgida and Opuntia versicolor. Inter. J. Plant Sciences. 162: 579-587.

____, Z. Kahn-Jetter, C. Frenz, J. Pancrudo and K. Lagrazon. 2001. Compressive/tensile stresses and lignified cells as resistance components in joints between cladodes of Opuntia laevis L. (Cactaceae): Responses to Applied Stresses. Environ. and Exp. Botany. 46: 47-53.

_______, Joseph Sullivan and Marigrace Lim. 2001. Initial effects of UV-B radiation on stem surfaces of Stenocereus thurberi (organ pipe cacti). Environmental and Experimental Botany 46: 181-187.

Kahn-Jetter, Z. _________, and Sara Butwell. 2002. Stresses on Joints of Opuntia laevis: Forces Necessary for Mechanical Failure and Role of Lignified Xylem Cells as Resistance Components. Environ Exper. Bot. 47: 231-237.

____________. M.Zugermayer and April J. Young. In press. Changes in surface injuries and mortality rates of Saguaro (Carnegiea gigantea) cacti over a twelve-year period. J. Torrey Bot. Soc.

______________ and R. K. Perez. In press. Diversity of Cell Lengths in Intercalary Meristem Regions of Grasses: Location of the Proliferative Cell Population. Can. J. Bot.

_______________, Z. Kahn-Jetter, J. Pancrudo, K. LaGrazon, and B. Litkouhi. In press. Compressive/tensile stresses and lignified xylem cells as resistance components in joints of Opuntia ficus-indica and Opuntia parryi var. parryi (Cactaceae). J. Torrey Bot. Soc.

Additional Publications

Address:
Laboratory of Plant Morphogensis
Biological Research Laboratories
Manhattan College
Manhattan College Parkway
Riverdale, NY 10471

Phone: 718-862-7267(Manhattan)

Fax: 718-862-7946(Manhattan)

E-mail address:  lance.evans@manhattan.edu

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