Valentine LL, TL Fiedler, SR Haney, HK Berninghausen, D Southworth 2002 Biodiversity of mycorrhizas on Garry Oak (Quercus garryana) in a southern Oregon Savanna. Fifth Symposium on Oak Woodlands, Oaks in California's changing landscape, USDA Forest Service gen. Tech. Rep. PSW-GTR-184
Southworth D, SD Russell 2001 Male gametogenesis. In SS Bhojwani, WY Soh eds., Current Trends in Angiosperm Embryology. Kluwer, Netherlands. Pp. 1-16
Southworth D 2001 Isolation of generative cells and sperm. In SS Bhojwani, WY Soh eds, Current Trends in Angiosperm Embryology. Kluwer, Netherlands. Pp. 17-32
Apple ME, DM Olszyk, DP Ormrod, J Lewis, D Southworth, DT Tingey 2000 Morphology and stomatal function of Douglas fir needles exposed to climate change: elevated CO2 and temperature Int. J. Plant Sci. 161:127-132
Southworth D 1999 Sperm and generative cells in pollen-prospects for systematics. In B Nordenstam, G El-Ghazaly, M Kassas (eds) Plant systematics for the 21st century Portland Press, London, UK pp 213-223
Southworth D, M Cresti 1998 Evolutionary relationships among sperm cells of land plants. In SJ Ovens, PJ Rudall (eds) Reproductive biology, pp. 147-157. Royal Botanic Gardens, Kew
Southworth D, Kwiatkowski S, Smith AR, Sharpless H, Merwin J, Marusich MF (1999) Antibodies to flowering-plant sperm. Protoplasma 208:115-122
Southworth D, M Cresti 1997 Comparison of flagellated and non-flagellated sperm in plants. Amer J Bot 84:1301-1311
Southworth D, Strout G, Russell SD. 1997 Freeze-fracture of sperm of Plumbago zeylanica L. in pollen and in vitro. Sex Plant Reprod 10:217-226
Southworth, D, Seevers J 1997 Taxonomic status of Limnanthes floccosa subspecies bellingeriana. Conservation and Management of Native Flora, TN Kaye, A Liston, RM Love, DL Luoma, MV Wilson (eds) Native Plant Society of Oregon, Corvallis, pp 147-152
Heath, SM, D Southworth, JA D'Allura 1997 Localization of nickel in epidermal subsidiary cells of leaves of Thlaspi montanum var. siskiyouense (Brassicaceae) using energy dispersive X-ray microanalysis. International Journal of Plant Sciences 158:184-188
Heath, SM, D Southworth, JA D'Allura 1997 Localization of nickel in leaves of Thlaspi montanum var. siskiyouense. Conservation and Management of Native Flora, TN Kaye, A Liston, RM Love, DL Luoma, MV Wilson (eds) Native Plant Society of Oregon, Corvallis, pp 207-208
Southworth, D, S Kwiatkowski 1996 Arabinogalactan proteins at the cell surface of Brassica sperm and Lilium sperm and generative cells. Sex Plant Reprod. 9:269-272
Southworth D 1996 Gametes and fertilization in flowering plants. Current Topics in Developmental Biology 34:259-279
Southworth D, J Jernstedt 1995 Pollen exine development and microtubule rearrangement in Vigna unguiculata (Fabaceae): A model for pollen wall patterning. Protoplasma 187:79-87
Li YQ, D Southworth, HF Linskens, DL Mulcahy, M Cresti 1995 Localization of ubiquitin in anthers and pistils of Nicotiana. Sex Plant Reprod. 8:123-128
Southworth D, Salvatici P, Cresti M 1994 Freeze fracture of membranes at the interface between vegetative and generative cells in Amaryllis pollen. Int J Plant Sci 155:538-544
Southworth D, S Kwiatkowski 1994 Somatic embryogenesis and clonal propagation in meadowfoam (Limnanthes species). In Biotechnology in agriculture and forestry. Vol 31. Somatic Embryogenesis and synthetic seed II, YPS Bajaj (ed) pp. 274-282, Springer, New York
Southworth D, P Pfahler 1992 The effects of genotype and ploidy level on pollen surface sculpturing in maize (Zea mays L.). Amer J Bot 79:1418-1422
Southworth D, PA Morningstar 1992 Isolation of generative cells from pollen of Phoenix dactylifera. Sex Plant Reprod 5:270-274
Southworth D, R Copley, S Kwiatkowski 1992 Isolation of generative cells and sperm from pollen tubes of Lilium. In Angiosperm pollen and ovules, E Ottaviano, DL Mulcahy, M Sari Gorla, G Bergamini Mulcahy (eds) pp 321-324. Springer, New York
Southworth D 1992 Freeze fracture of male reproductive cells. In Sexual Reproduction in Flowering plants, SD Russell, C Dumas (eds). Int Rev Cytol 140:187-204
Southworth D 1992 Reproduction (plant). 1992 Yearbook of Science and Technology, pp 396-398. McGraw-Hill, New York
Southworth D, S Kwiatkowski 1992 Clonal propagation of meadowfoam (Limnanthes sp.) from bisected seeds. Northwest Science 66:40-43
Southworth D, S Kwiatkowski 1991 Secondary embryogenesis in meadowfoam (Limnanthes alba). Plant Cell, Tissue, Organ Culture 24:193-198
Southworth D 1990 Freeze-fracture faces of sperm and generative cells. In Characterization of male transmission units in higher plants, B Barnabas, K Liszt (eds) pp 9-13. Agricultural Research Institute, Hungarian Acad Sci, Budapest
Southworth D 1990 Exine biochemistry. In Microspores: Evolution and ontogeny. S Blackmore, RB Knox (eds) pp 193-212. Academic Press, London
Southworth D 1990 Membranes of sperm and vegetative cells of Gerbera jamesonii. J Struct Biol 103:97-103
Southworth D, KA Platt-Aloia, WW Thomson 1989 Freeze-fracture of sperm and vegetative cells in Zea mays pollen. J Ultrastruct Molec Struct Res 101:165-172
Southworth D, KA Platt-Aloia, WW Thomson 1989 Freeze-fracture of the generative cell of Phoenix dactylifera. Sexual Plant Reproduction 2:270-276
Southworth D, RB Knox 1989 Isolation of sperm cells from Gerbera jamesonii pollen. Plant Science 60:273-277
Southworth D, MB Singh, T Hough, IJ Smart, P Taylor, RB Knox 1988 Antibodies to pollen exines. Planta 176:482-487
Provoost E, D Southworth, RB Knox 1988 Structure of sperm cells of Gerbera jamesonii. In Plant sperm cells as tools for biotechnology. HJ Wilms, CJ Keijzer (eds) pp 69-73. Pudoc, Wageningen
Southworth D, RB Knox 1988 Methods for isolation of sperm cells from pollen. In Plant sperm cells as tools for biotechnology, HJ Wilms, CJ Keijzer (eds) pp 87-95. Pudoc, Wageningen
Knox RB, D Southworth, MB Singh 1988 Sperm cell determinants and control of fertilisation in plants. In Eukaryote cell recognition: concepts and model systems, GP Chapman, CC Ainsworth, CJ Chatham (eds) pp 175-193. Cambridge University Press
Southworth D 1988 Isolation of exines from gymnosperm pollen. Amer J Bot 75:15-21
Southworth D 1986 Substructural organization of pollen exines. In Pollen and spores form and function. S Blackmore and IK Ferguson, eds, pp 61-70. Academic Press, London
Southworth D 1986 Pollen exine substructure III Juniperus communis. Can J Bot 64:983-987
Southworth D 1985 Pollen exine substructure II Fagus sylvatica. Grana 24:161-166
Southworth D 1985 Pollen exine substructure I Lilium longiflorum. Amer J Bot 72:1274-1283
Southworth D, DG Myles 1985 Ultraviolet absorbance spectra of megaspore and microspore walls of Marsilea vestita. Pollen Spores 26:481-488
Southworth D 1983 Exine development in Gerbera jamesonii pollen (Asteraceae: Mutisieae) Amer J Bot 70:1038-1047
Southworth D 1983 Developmental changes in UV absorbance by pollen exine layers in Gerbera (Asterceae). Grana 22:115-118
Leibowitz MD, D Southworth 1983 Lectin stimulation of pollen germination: Inhibitor effects and lectin binding in lily (Lilium longiflorum). J Palynol 19:197-20
Southworth D 1983 pH changes during pollen germination in Lilium longiflorum. In D Mulcahy, E Ottaviano (eds) Pollen: Biology and Implications for Plant Breeding, Elsevier, Amsterdam. Pp 61-65
Southworth D, DB Dickinson 1981 Ultrastructural changes in germinating lily pollen. Grana 20:29-95
Southworth D, TM Hursh 1979 Population Growth A Problem Solving Approach. COMPress, Wentworth NH 163pp
Myles D, D Southworth, PK Hepler 1978 A freeze-fracture study of the nuclear envelope during spermiogenesis in Marsilea: Formation of a pore-free zone associated with the microtubule ribbon Protoplasma 93:419-431
Myles D, D Southworth, PK Hepler 1978 Cell surface topography during Marsilea spermiogenesis: flagellar reorientation and membrane particle arrays. Protoplasma 93:405-417
May G, D Southworth, D Dickinson 1975 Analysis of sporopollenin from pollen of Ambrosia artemisiifolia and A. trifida Grana l5:149-152
Southworth D 1975 Lectins stimulate pollen germination. Nature 258:600-602
Southworth D, DB Dickinson 1975 B-1,3-glucan synthase from Lilium longiflorum pollen. Plant Physiol. 56:83-87
Southworth D, K Fisher, D Branton 1974 Principles of freeze-fracturing and etching. In Techniques of Biochemical and Biophysical Morphology Vol 2, D Glick, RM Rosenbaum (eds). John Wiley, New York. Pp 247-282
Southworth D 1974 Introduction to the biology of airborne fungal spores. Ann Allergy 32:1-22
Southworth D 1974 Solubility of pollen exines. Amer J Bot 61:36-44
Southworth D 1973 Cytochemical reactivity of pollen walls. J Histochem Cytochem 21:73-80
Southworth D, D Branton 1971 Freeze-etched pollen walls of Artemisia pycnocephala and Lilium humboldtii. J Cell Sci 9:193-207
Southworth D 1971 Incorporation of radioactive precursors into developing pollen walls. In Pollen: Development and Physiology, J Heslop-Harrison ed, Butterworths, London
Southworth D 1970 Pollen wall studies: composition, structure and development. PhD Thesis Univ of Calif, Berkeley
Southworth D 1969 Ultraviolet absorption spectra of pollen and spore walls. Grana palynol 9:5-15
Branton D, D Southworth 1967 Fracture faces of frozen Chlorella and Saccharomyces cells. Exptl Cell Res 47:648-653
Rowley JR, D Southworth 1967 Deposition of sporopollenin on lamellae of unit membrane dimensions. Nature 213:703-704
Southworth D 1966 Ultrastructure of Gerbera jamesonii pollen. Grana palynol 6:324-337
Helmich D 1963 Pollen morphology in the maples (Acer L) Pap Mich Acad Sci, Arts Letrs 48:151-164