Department of Botany & Plant Sciences


LovattCarol J. Lovatt

Professor of Plant Physiology and Plant Physiologist
(Ph.D., 1980, University of Rhode Island)
Office: 4130 Batchelor Hall
Phone: (951) 827-4663
Fax: (951) 827-4437
E-mail: carol.lovatt@ucr.edu



Fellow, American Association for the Advancement of Science

Recipient of the 2008/09 University of California Academic Senate Distinguished Service Award

Recipient of the 1996/97 University of California Academic Senate Distinguished Teaching Award

California Avocado Society Award of Honor 2007

Amer. Soc. for Hort. Sciences Outstanding Graduate Educator Award 2007

Amer. Soc. for Hort. Sciences Award for Most Outstanding Cross-Commodity Research Paper 1988

Amer. Soc. for Hort. Sciences Award for Most Outstanding Research Paper on Fruit Crops 1987

Regulation of flowering, fruit set, and fruit development of citrus, avocado, other subtropical tree crops, and pistachio. Role of hormones and nutrition in regulating these processes.  Abiotic stress physiology.

The goal of my basic and applied research program is to solve production problems for the California and worldwide citrus and avocado industries. Basic research is conducted with both annual plants and tree crops to advance scientific knowledge of the regulation of nitrogen metabolism in response to abiotic stress and of the physiological processes regulating flowering, fruit set and fruit development. To determine the role of hormones in regulating these processes, changes in endogenous hormone concentrations and ratios are quantified by radioimmunoassay. In addition, anatomical studies are conducted to develop morphological markers predictive of key stages in the phenology of each tree crop. Results of the basic research are used to develop and test new production management strategies, in particular, properly timed plant growth regulator and foliar-fertilizer applications, to increase grower income and the sustainability of the commodity-based industries.

Some Representative Publications:

Brady, B.S., B.C. Hyman and C.J. Lovatt. 2010. Regulation of CPSase, ACTase, and OCTase genes in Medicago truncatula: Implications for carbamoylphosphate synthesis and allocation to pyrimidine and arginine de novo biosynthesis. Gene 462:18-25.

Gonzalez, C., Y. Zheng and C.J. Lovatt. 2010. Properly timed foliar fertilization can and should reult in a yield benefit and net increase in grower income. Acta Hort. 868:273-286.

Mochizuki, M.J., O. Daugovish, M.H. Ahumada, S. Ashkan, and C.J. Lovatt. 2010. Carbon dioxide enrichment increases yield of field-grown red raspberry under high tunnels. HortTechnology 20:213-219. 

Verreynne, J.S.,and C.J. Lovatt. 2009. Effect of crop load on bud break influences alternate bearing in 'Pixie' mandarin. J. Amer. Soc. Hort. Sci. 134:1-9.

Garner, L.C., V.E.T.M. Ashworth, M.T. Clegg, and C.J. Lovatt. 2008. The impact of outcrossing on yields of 'Hass' avocado. J. Amer. Soc. Hort. Sci. 133:648-652.

Garner, L.C., and C.J. Lovatt. 2008. The relationship between flower and fruit abscission and alternate bearing of 'Hass' avocado. J. Amer. Soc. Hort. Sci. 133:3-10.

Violi, H.A., A.F. Barrientos-Priego, S.F. Wright, E. Escamilla-Prado, J.B. Morton, J.A. Menge and C.J. Lovatt. 2008. Disturbance changes arbuscular mycorrhizal fungal phenology and soil glomalin concentrations but not fungal spore composition in montane rainforests in Veracruz and Chiapas, Mexico. Forest Ecol. and Management 254:276-290.

Duca, M., A. Port, M. Orozco-Cardenas, and C.J. Lovatt. 2008. Gibberellin-induced gene expression associated with cytoplasmic male sterility in sunflower. Biotechnol. & Biotechnol. Eq. 22:691-698.

Salazar-García, S., L.E. Cossio-Vargas, I.J.L. González-Durán and C.J. Lovatt. 2007. Foliar-applied GA3 advances fruit maturity and allows off-season harvest of ‘Hass’ avocado. HortScience 42:257-261.

Salazar-García, S., L.E. Cossio-Vargas, C.J. Lovatt, I.J.L. González-Durán, and M.H. Pérez-Barraza. 2007. Crop load affects vegetative growth flushes and shoot age influences irreversible commitment to flowering of ‘Hass’ avocado. HortScience 41:1541–1546.

Violi, H.A., K.K. Treseder, J.A. Menge, S.F. Wright, and C.J. Lovatt. 2007. Density dependence and interspecific interactions between arbuscular mycorrhizal fungi mediate plant growth, glomalin production, and sporulation. Can. J. Bot. 85:63–75.

Gonzalez, C.M. and C.J. Lovatt. 2007. Foliar-applied aminoethoxyvinylglycine reduces albedo break-down of late-harvested navel orange fruit: Preliminary results. Proc.  Intl. Soc. Citricult.3:1062-1065.

Salazar-García, S., L.E. Cossio-Vargas, I.J.L. González-Duran, and C. J. Lovatt. 2006. Effect of canopy sprays with plant bioregulators on ‘June fruit drop’, yield and fruit size of ‘Hass’ avocado. Acta Hort. 727:197-202.

Current Laboratory Personnel and Projects:

Yusheng Zheng, Assistant Specialist.  Use of properly timed foliar fertilizer and plant growth regulator strategies to increase yield and fruit size and mitigate alternate bearing in citrus and avocado.

Toan Khuong, Assistant Specialist.  Data management and statistical analysis of data.

Javier Narvaez-Vasquez, Assistant Research Specialist.  Regulation of floral gene expression in avocado, mango and citrus.

Walter Lopez, Junior Specialist.  Effect of crop load (fruit number) on floral gene expression in 'Hass' avocado.

Tingting Ma, Junior Specialist.  Effect of climate change due to global warming on mango floral gene expression.

Lisa Tang, Ph.D. Student.  Effect of abiotic stress on hormone homeostasis and floral gene expression in citrus.

Eric Jorgensen, Technical Expert.  Irrigation management of partial root zone drying; foliar application of fertilizers and plant growth regulators.

Jose Aviles, Michael Jorgensen, Gavin Meeks and Alec Weitzel, Technical Support.  Trunk injections, field data collection and sample processing.

More Information

General Campus Information

University of California, Riverside
900 University Ave.
Riverside, CA 92521
Tel: (951) 827-1012

Career OpportunitiesUCR Libraries
Campus StatusDirections to UCR

Department & Program Information

Department of Botany & Plant Sciences
2142 Batchelor Hall

Tel: (951) 827-4619
Fax: (951) 827-4437
E-mail: bpschair@ucr.edu

Plant Biology Graduate Program
CNAS Grad Student Affairs Office
1140 Batchelor Hall

Toll: (800) 735-0717
Tel: (951) 827-5688
Fax: (951) 827-5517
E-mail: Laura.mcgeehan@ucr.edu