Department of Botany & Plant Sciences


DeMasonDarleen A. DeMason

Professor of Botany and Plant Morphologist (Ph.D., 1978, University of California, Berkeley)
Office: 1125 Batchelor Hall
Phone: (951) 827-3580
Fax: (951) 827-4437
Email: darleen.demason@ucr.edu



Dr. DeMason's research objective is to understand the mechanisms of plant development. She is using morphological mutants to study processes at the level of the cell, tissue, organ, and whole plant. A number of plant hormones are involved in leaf development. The pea leaf mutants have proven useful in elucidating the roles that auxin and GA might play. The approach is multidisciplinary and includes structural, molecular, physiological and genetic analyses.

Two primary lines of research are:

  • Genetic control of pea leaf morphogenesis
  • Role of auxin gradients in leaf development

Some Representative Publications:

59. Villani, P.J., DeMason, D.A. 2000. Roles of the Af and T1 genes in pea leaf morphogenesis: Shoot ontogeny and leaf development in the heterozygotes. Ann. Bot. Vol. 85: p.123-135. (Refereed)  

60. Asghar, R., DeMason, D. 2000. Characterization of a-galactosidase in abaxial and adaxial regions from cotyledons of Lupins luteus L. (family Fabaceae). Proc. Pakistan Acad. Sci. Vol. 37: p.133-142. (Refereed)  

61. DeMason, D., Villani, P.J. 2001. Genetic control of leaf development in pea (Pisum sativum). Int. J. Plant Sci. Vol. 162: 3 p.493-511. (Refereed)  

62. DeMason, D., Schmidt, R.J. 2001. Roles of the Uni gene in shoot and leaf development of pea (Pisum sativum): phenotypic characterization and leaf development in the uni and uni-tac mutants. Int. J. Plant Sci. Vol. 162: 5 p.1033-1051. (Refereed)  

63. DeMason, D., Costea, M. 2001. Stem morphology and anatomy in Amaranthus L. (Amaranthaceae) -- Taxonomic significance. J. Torrey Bot. Soc. Vol. 128: p.254-281. (Refereed)  

64. Chawla, R., DeMason, D. 2003. Genome Walking in pea: an approach to clone unknown flanking sequences. Pisum Genet. Vol. 35: p.3-5. (Refereed)  

65. Husbands, A.T., Emirzade, T., DeMason, D. 2003. Stipule morphologies of the sinuate leaf (sil) mutants. Pisum Genet. Vol. 35: p.6-9. (Refereed)  

66. DeMason, D., Chawla, R. 2004. Roles for auxin during morphogenesis of the compound leaves of pea (Pisum sativum). Planta. Vol. 218: p.435-448. (Refereed)  

67. DeMason, D.A., Chawla, R. 2004. Roles of auxin and Uni in leaf morphogenesis of the afila genotype of pea (Pisum sativum). Int. J. Plant Sci. Vol. 165: p.707-722. (Refereed)  

68. Chawla, R., DeMason, D. 2004. Molecular expression of PsPIN1, a putative auxin efflux carrier gene from pea (Pisum sativum L.). Plant Growth Reg. Vol. 44: p.1-14. (Refereed)  

69. Bai, F., Watson, J.C., Walling, J., Weeden, N., Santner, A.A., DeMason, D. 2005. Molecular characterization and expression of PsPK2, a PINOID-like gene from pea (Pisum sativum). Plant Sci. Vol. 168: p.1281-1291. (Refereed)  

70. Soto-Estrada, A., Forster, H., DeMason, D., Adaskaveg, J.E. 2005. Initial infection and colonization of leaves and stems of cling peach by Tranzschelia discolor. Phytopathology. Vol. 95: p.942-950. (Refereed)  

71. DeMason, D. 2005. Auxin-cytokinin and auxin-gibberellin interactions during   morphogenesis of the compound leaves of pea (Pisum sativum). Planta. Vol. 222: p.151-166. (Refereed)  

72. DeMason, D. 2005. Extending Marx's isogenic lines in search of Uni function. Pisum Genet. Vol. 37: p.10-15. (Refereed)  

73. DeMason, D., Chawla, R. 2006. Auxin/gibberellin interactions in pea leaf morphogenesis. Bot. J. Linn. Soc. Vol. 150: p.45-59 . (Refereed)  

74. DeMason, D., Weeden, N.F. 2006. Two Argonaute1 genes from pea. . Pisum Genet. Vol. 38: p.3-9. (Refereed)  

75. Bai, F., DeMason, D. 2007. Hormone interactions and regulation of Unifoliata, PsPK2, PsPIN1 and LE gene expression in pea (Pisum sativum) shoot tips. Plant, Cell Physiol. Vol. 47: p.935-948. (Refereed)    

76. Annamalai, P., Rofail, F., DeMason, D., Rao, A.LN. 2008. Replication-coupled packaging mechanism in positive-strand RNA viruses: Synchronized co-expression of functional multigenome RNA components of an animal and a plant virus in Nicotiana benthamiana cells by agroinfiltration  . J. Virology. Vol. 82: p.1481-1495. (Refereed)    

77. Das, S., DeMason, D., Ehlers, J.D., Close, T.J., Roberts, P.A. 2008. Histological characterization of root-knot nematode resistance in cowpea and its relation to reactive oxygen species modification.  . J. Exp. Bot. Vol. 59: p.1305-1313. (Refereed)    

 78. Bai, F., DeMason, D. 2008. Hormone interactions and regulation of PsPK2::GUS compared with DR5::GUS and PID::GUS in Arabidopsis thaliana. Amer. J. Bot. Vol. 95: p.133-145. (Refereed)  

79. Niklas, K.J., DeMason, D., Cobb, E.D. 2008. Genetic effects on the biomass partitioning and growth of Pisum and Lycopersicon. . Amer. J. Bot. Vol. 95: p.424-433. (Refereed)  

(In Press)

1. DeMason, D., Polowick, P.L. Patterns of DR5::GUS expression in organs of pea (Pisum sativum).  . International Journal of Plant Sciences. (Accepted 05/20/2008. 31 manuscript pages. 11 galley pages.) (Refereed) 

Current Laboratory Personnel and Projects:

 Venkateswari Jaganatha, lab personnel

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