___

• American Botanical Council (1994) Echinacea : a literature review; botany, history, chemistry, pharmacology, toxicology, and clinical uses. HerbalGram 30: 33–53 .
• Atrooz OM (2009) Te antioxidant activity and polyphenolic contents of diferent plant seeds extracts. Pak J Biol Sci 12: 1063–1068.
• Breton C, Gil A, Wargnier J, Serieys H, Berville A (2012) Transfer of architectural traits from perennial Helianthus mollis Lam. to sunfower (H. annuus L.) and localisation of introgression. Euphytica 186: 557–572.
• Caretto S, Paradiso A, D’Amico L, De Gara L (2002) Ascorbate and glutathione metabolism in two sunfower cell lines of difering alpha-tocopherol biosynthetic capability. Plant Physiol Biochem 40: 509–513.
• Carney SE, Gardner KA, Rieseberg LH (2000) Evolutionary changes over the ffy-year history of a hybrid population of sunfowers (Helianthus). Evolution 54: 462–474.
• Chen ZY, Chan PT, Ho KY, Fung KP, Wang J (1999) Antioxidant activity of natural favonoids is governed by number and location of their aromatic hydroxyl groups. Chem Phys Lipids 79: 157–163.
• Christov M, Vassilevska-Ivanova R (1999) Intergeneric hybrids in Compositae (Asteraceae). Hybridization between cultivated sunfower H. annuus L. and species of Compositae genera. Helia 22: 13–22.
• Davey MR, Masood J (2010) Sunfower (Helianthus annuus L.): genetic improvement using conventional and in vitro technologies. J Crop Improv 24: 349–391.
• Demurin Y (1993) Genetic variability of tocopherol composition in sunfower seeds. Helia 16: 59–62.
• Eaton SB, Konner M (1985) Paleolithic nutrition. A consideration of its nature and current implications. N Engl J Med 312: 283–289.
• Fambrini M, Bertini D, Pugliesi C (2003) Te genetic base of a mutation that alters the foral symmetry in sunfower. Ann Appl Biol 143: 341–347.
• Faure N, Serieys H, Cazaux E, Kaan F, Berville A (2002) Partial hybridization in wide crosses between cultivated sunfower and the perennial helianthus species H. mollis and H. orgyalis. Ann Bot 89: 31–39.
• Fedak G (1984) Alien species as sources of physiological traits for wheat improvement. Euphytica 34: 673–680.
• Goodman RM, Hauptli H, Crossway A, Knauf WC (1987) Gene transfer in crop improvement. Science 236: 48–54.
• Greenfeld J, Davis JM (2004). Purple conefower [ Echinacea purpurea (L.) Moench.] Medicinal herb production guide. www.naturalmedicineofnc.org.
• Hajjar R, Hodgkin T (2007) Te use of wild relatives in crop improvement: a survey of developments over the last 20 years. Euphytica 156: 1–13.
• Hardig TM, Brunsfeld SJ, Fritz RS, Morgan M, Orians CM (2000) Morphological and molecular evidence for hybridization and introgression in a willow (Salix) hybrid zone. Mol Ecol 9: 9–24.
• Iliev I, Petkov G (2006) Growth, lipids and fatty acids of the desert tolerant blue-green alga Arthronema africanum . Comp Rend Acad Bulg Sci 59: 1079–1082.
• Kim HT, Kim KP, Uchiki T, Gygi SP, Goldberg AL (2009) S5a promotes protein degradation by blocking synthesis of nondegradable forked ubiquitin chains. EMBO J 28: 1867–1877.
• Luczkiewicz T (1975) Inheritance of some characters and properties in sunfower (Helianthus annuus L.). Genet Pol 16: 167–184.
• Nieto A, Garrido J, Sanhueza J, Loyola L, Morales G, Leighton F, Valenzuela A (1993) Flavonoids as stabilizers of fsh oil: an alternative to synthetic antioxidants. J Am Oil Chem Soc 70: 773–778.
• Pfefer H, Dannel F, Rumheld V (1998) Are there connections between phenol metabolism, ascorbate metabolism and membrane integrity in leaves of boron-defcient sunfower plants? Physiol Plant 104: 479–485.
• Pietta PG (2000) Flavonoids as antioxidants. J Nat Prod 63: 1035– 1042.
• Prieto P, Pineda M, Aquilar M (1999) Spectrophotometric quantitation of antioxidant capacity through the formation of a phosphomolybdenum complex: specifc application to the determination of vitamin E. Anal Biochem 269: 337–341.
• Rick CM, DeVerna JW, Checlat RT, Stevens MA (1986) Meiosis in sesquidiploid hybrids of Lycopersicon esculentum and Solanum lycopersicoides. Proc Nat Acad Sci USA 83: 3580–3583.
• Rieseberg LH, Ellstrand NC, Arnold M (1993) What can molecular and morphological markers tell us about plant hybridization? Crit Rev Plant Sci 12: 213–241.
• Stancheva I, Geneva M, Yonova P, Markovska Yu (2011) Accumulation of Cd, Pb and Zn in Tribulus terrestris L. grown on industrial polluted soil and plant antioxidant response. Adv Environ Biol 5: 300–306.
• Seiler G, Gulya T (2004) Exploration for wild Helianthus species in North America: challenges and opportunities in the search for global treasures. In: Proceedings of the 16th International Sunfower Conference, Fargo, ND, USA. pp. 43–68.
• Smirnof N (1993) Te role of active oxygen in the response of plants to water defcit and desiccation. New Phytol 125: 27–58.
• Tepe B, Sokmen M, Akpulat HA, Sokmen A (2006) Screening of the antioxidant potentials of six Salvia species from Turkey. Food Chem 95: 200–204.
• Toms EM (1992) An investigation into the efects of selection within an inbreeding programme in sunfower. PhD, University of Birmingham, UK.
• Toms EM, Pooni HS (1995) An evaluation of crosses between some French male sterile and UK restorer lines of the sunfower. Helia 18: 51–58.
• Tsukaya H, Fucuda T, Yokoyama J (2003) Hybridization and introgression between Callicarpa japonica  and  C. mollis (Verbenaceae) in central Japan, as inferred from nuclear and chloroplast DNA sequences. Mol Ecol 12: 3003–3011. 
• Vassilevska-Ivanova R (2005) Short cycle sunfower line derived from intergeneric hybridization Helianthus × Verbesina. Helia 28: 55–59.
• Vassilevska-Ivanova R, Kraptchev B, Stancheva I, Geneva M (2013) A compact sunfower line produced afer cross Helianthus annuus × Verbesina encelioides. Cent Eur J Biol 8: 492–498.
• Vassilevska-Ivanova R, Naidenova N (2005) Intergeneric hybridization between cultivated sunfower and Asteraceae genera: Helianthus annuus × Echinacea purpurea. Comp Rend Acad Bulg Sci 58: 729–734.
• Vassilevska-Ivanova R, Tcekova Z (2005) Agronomic characteristic of a dwarf germplasm sunfower line. Helia 28: 51–56.
• Vassilevska-Ivanova R, Tcekova Z, Lidansky T (1999) Intergeneric hybridization of cultivated sunfower Helianthus annuus L. with Tithonia rotundifolia Blake. Comp Rend Acad Bulg Sci 52: 93–96.
• Zhishen J, Mengcheng T, Jianming W (1999) Te determination of favonoid contents in mulberry and their scavenging efects on superoxide radicals. Food Chem 64: 555–559.