Seed Biology

Scientist-Seed Physiologist. Sakata Seed America, Morgan Hill CA March 2004-Present.
Responsible of Planning and Executing Seed Physiology Research Projects in Vegetable Crops
Post-Doctorate Associate. The Ohio State University, Columbus, OH January 2003-September 2003 Conducting Research on the Effects Biological Seed Treatments on Stand Establishment of Vegetable Crops
Post-Doctorate Associate. Collaborating in the Study of the Genetic Basis of Tomato Fruit Development. The Ohio State University, Columbus, OH September1998- December 2002.
Graduate Research Associate. Conducting Research on Tomato Seed Germination and Vigor in the Department of Horticulture and Crop Science.







						Gerardo Ramirez-Rosales

						Current address: Sakata Seed America Serene Drive Morgan Hill CA 95038 Phone: +1 (408) 778-7758 E-mail address : gramirez@sakata.com




						Positions held: Scientist-Seed Physiologist. Sakata Seed America, Morgan Hill CA March 2004-Present. Responsible of Planning and Executing Seed Physiology Research Projects in Vegetable Crops Post-Doctorate Associate. The Ohio State University, Columbus, OH January 2003-September 2003 Conducting Research on the Effects Biological Seed Treatments on Stand Establishment of Vegetable Crops Post-Doctorate Associate. Collaborating in the Study of the Genetic Basis of Tomato Fruit Development. The Ohio State University, Columbus, OH September1998- December 2002. Graduate Research Associate. Conducting Research on Tomato Seed Germination and Vigor in the Department of Horticulture and Crop Science.
				Education background: PhD 2002 The Ohio State University, USA (Horticulture & Crop Science) MS 1993 Agrarian University “Antonio Narro”, Coahuila, Mexico, (Plant Breeding with major in Seed Technology) BS 1987 Agrarian University “Antonio Narro”, Coahuila, Mexico (Agronomy)


				Research interests: We are currently investigating the environmental conditions (temperature, relative humidity, light intensity), that are more important on the expression of high percentage of dormant seeds in vegetable crops (cauliflower, for instance). Parallel to this, we want to identify the stage of development at which seed becomes dormant. We are also doing research on the conditions that favor a more rapid dormancy loss in storage (after-ripening). We are very interested in developing research projects to find the origin of a seed physiology issue, such as low germination, poor vigor, high dormancy, and rapid deterioration. We want to identify at which seed production stage (seed development, maturation, drying, harvesting, conditioning, or storage) that issue is originated. Papers (click here for complete lists of papers/abstracts) Ramirez-Rosales, G. Bennett, M. McDonald M. and Francis, D. 2005. Gibberellin plus Norflurazon Enhance the Germination of Dark Green Tomato (Lycopersicon esculentum Mill.) Genotypes. Seed Technology, 27(1):59-65 Ramirez-Rosales, G. Bennett, M. McDonald M. and Francis, D. 2005. Total Antioxidant Capacity of Seeds from Normal and Enhanced Lycopene Tomato (Lycopersicon esculentum Mill.) Genotypes. Seed Technology, 27(1):66-75 P. Peñaloza, G. Ramirez-Rosales, M. B. McDonald and M. A. Bennett. Lettuce (Lactuca sativa L.) Seed Quality Evaluation Using Seed Physical Attributes, Saturated Salt Accelerated Aging and the Seed Vigor Imaging System. Accepted Ramirez-Rosales, G. Bennett, M. McDonald M. and Francis, D. 2004. Effect of Fruit Development on the Germination and Vigor of High Lycopene Tomato (Lycopersicon esculentum Mill.) Seeds. Seed Science and Technology, 32:775-783 Cano-Rios, P., Ramirez-Rosales, G., Ortegon-Perez, J., Esparza-Martinez-J.H. and Rodríguez-Herrera, S. 2000. Diallel Analysis of Seed Vigor in Muskmelon. Agrociencia 34:337-342.