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Flower development of Lilium longiflorum - The Lilium information ...

Flower development of Lilium longiflorum - The Lilium information ...

Chapter 2

Chapter 2 Theissen G, Becker A, Rosa AD, Kanno A, Kim JT, Münster T, Winter K-U, Saedler H (2000) A short history of MADS-box genes in plants. Plant Mol Biol 42: 115-149 Thompson JD, Gibson TJ, Plewniak F, Jeanmougin F, Higgins DG (1997) The ClustalX windows interface: flexible strategies for multiple sequence alignment aided by quality analysis tools. Nucleic Acids Res 24: 4876-4882 Tzeng TS, Yang CH (2001) A MADS-box gene from lily (Lilium longiflorum) is sufficient to generate dominant negative mutation by interacting with PISTILLATA (PI) in Arabidopsis thaliana. Plant Cell Physiol 42: 1156-1168 Tzeng TS, Chen HY, Yang CH (2002) Ectopic expression of carpel-specific MADS box genes from lily and lisianthus causes similar homeotic conversion of sepal and petal in Arabidopsis. Plant Physiol 130: 1827-1836 van Engelen FA, Molthoff JW, Conner AJ, Nap JP, Pereira A, Stiekema WJ (1995) pBINPLUS: an improved plant transformation vector based on pBIN19. Transgenic Res 4: 288-290 Webster MA, Gilmartin PM (2003) A comparison of early floral ontogeny in wild-type and floral homeotic mutant phenotypes of primula. Planta 216: 903-917 Winter K-U, Weiser C, Kaufmann K, Bohne A, Kirchner C, Kanno A, Saedler H, Theissen G (2002) Evolution of class B floral homeotic proteins: obligate heterodimerization originated from homodimerization. Mol Biol Evol 19: 587-596 Yanofsky MF, Ma H, Bowman JL, Drews GN, Feldmann KA, Meyerowitz EM (1990) The protein encoded by the Arabidopsis homeotic gene agamous resembles transcription factors. Nature 346: 35-39 Yu D, Kotilainen M, Pöllänen E, Mehto M, Elomaa P, Helariutta Y, Albert VA, Teeri TH (1999) Organ identity genes and modified patterns of flower development in Gerbera hybrida (Asteraceae). Plant J 17: 51-62 Yu H, Goh CJ (2000) Identification and characterization of three orchid MADS-box genes of the AP1/AGL9 subfamily during floral transition. Plant Physiol 123: 1325-1336 Yu H, Goh CJ (2001) Molecular genetics of reproductive biology in orchids. Plant Physiol 127: 1390-1393 Zhou J, Pesacreta TC, Brown RC (1999) RNA isolation without gel formation from oligosaccharide-rich onion epidermis. Plant Mol Biol Rep 17: 397-407 32

CHAPTER THREE Isolation and Characterisation of LLSEP3 Overexpression of a MADS-box gene from Lilium longiflorum homologous to Abstract SEPALLATA3 is able to induce early flowering in Arabidopsis Vagner A. Benedito, Peter B. Visser, Gerco C. Angenent, Frans A. Krens Plant Research International Droevendaalsesteeg 1, 6700 AA Wageningen, The Netherlands SEPALLATA3 (SEP3) is a MADS-box homeotic gene possibly determining the E function in the ABCDE model. This function is essential for proper development of petals, stamens and carpels. In order to gain further information on lily (Lilium longiflorum) flower development at the molecular level, a cDNA library constructed from developing floral buds was screened, and a clone (LLSEP3) was isolated with high similarity to the SEP3 transcription factor from Arabidopsis. LLSEP3 belongs to the AGL2 subfamily of MADS-box genes and shares its closest relationships with DOMADS1 and OM1, from the orchid species Dendrobium grex and Aranda deborah, respectively. Expression analysis by Northern hybridisation showed that LLSEP3 was expressed throughout lily flower development and in tepals, stamens and carpel tissues of mature flowers, whereas no expression was detected in leaves. Overexpression of LLSEP3 in Arabidopsis under the CaMV35S promoter induced early flowering but did not induce any floral homeotic changes, which is in accordance with the effect of SEP3 overexpression in this species. Altogether, these data are consistent with the putative role of LLSEP3 as an E functional gene in lily flower development. 33

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