(1995) University of California, Davis
Areas of Expertise
In order to be prepared for the consequences of environmental change on wild and cultivated plants, it is important to understand how plants respond developmentally and physiologically to conditions in the environment. In the past, my interests and research foci have been the modes-of-action of herbicides and the effects of temperature on the development and physiology of root systems using physico-chemical techniques and computer image analysis. I have completed a study that suggests the environment has influences on internal timing mechanisms (biological clocks) that regulate stage-specific developmental events beyond what can be attributed to thermodynamic considerations. More recently we have been studying the effects of flooding on root anatomy and development, especially vascular aerenchyma formation and programmed cell death in legumes. I will be continuing studies on the effects of temperature, flooding, and other environmental factors on the developmental anatomy and physiology of roots.
I am also interested in studying the effects of of anthropogenic disturbances such as landfill activities on roots and other aspects of plant development. It is my intention to do studies on a landfill site planted with native tallgrass prairie species. This reconstructed prairie area is associated with the botanical conservatory at Miami's Hamilton Campus.
The Conservatory presents a new opportunity for students in the botany programs at Miami. As Director of The Conservatory, I manage our outreach programs and along with our Manager supervise a team of student workers and interns who help with the maintenance of the collection and its records and who do research on the plants to provide information about them to the public.
Purbasha, S., and Gladish, D.K. 2012. Hypoxic Stress Triggers a Programmed Cell Death Pathway to Induce Vascular Cavity Formation in Pisum Sativum Roots. Physiologia Plantarum 146:413-426.
Niki, T., Mitsuo, T., and Gladish, D.K. 2011. Comparison of the effects of flooding vs. low-oxygen gas on pea (Pisum sativum L. cv. ‘Alaska’) primary roots. Plant Root 5:31-39.
Gladish, D.K., and Niki, T. 2008. Ethylene is involved in vascular cavity formation in pea (Pisum sativum) primary roots. Plant Root 2: 38-45.
Purbasha, S., Niki, T., and Gladish, D.K. 2008. Changes in cellular ultrastructure induced by sudden flooding at 25° C in Pisum sativum (Fabaceae) primary roots. American Journal of Botany 95:1-12.
Gladish, D.K., Xu, J., and Niki, T. 2006. Apoptosis-like programmed cell death occurs in procambium and ground meristem of pea (Pisum sativum) root tips exposed to sudden flooding. Annals of Botany 97: 895-902.
Niki, T., and Gladish, D.K. 2001. Changes in growth and structure of pea primary roots (Pisum sativum L. cv. Alaska) as a result of sudden flooding. Plant and Cell Physiology 42: 694-702.
Gladish, D.K., Sutter, E.G., and Rost, T.L. 2000. The role of free IAA levels, IAA transport, and sucrose transport in the high temperature inhibition of root system development in pea (Pisum sativum L. cv. Alaska). Journal of Plant Growth Regulation 19: 347-358.
Gladish, D.K., and Niki, T. 2000. Factors inducing cavity formation in the vascular cylinders of pea roots (Pisum sativum L, cv. Alaska ). Environmental and Experimental Botany 43: 1-9.