Ectopic expression of a hyacinth AGL6 homolog caused earlier flowering and homeotic conversion in Arabidopsis

查看全文 作　　者：FAN JinHui1, LI WenQing2, DONG XiuChun1, GUO Wei1 & SHU HuaiRui3 1 College of Forestry, Shandong Agricultural University, Taian 271018, China;2 College of Biological Science, China Agricultural University, Beijing 100094, China;3 College of Horticulture Science and Engineering, Shandong Agricultural University, Taian 271018, China

出　　处：《Science China(Life Sciences)》索引2007年第50卷第5期,共14页

摘　　要：MADS-box genes are involved in floral organ development. Here we report that an AGL6(Agamous-like 6)-like MADS-box gene, HoAGL6, was isolated from Hyacinthus orientalis L. Expression pattern analy-sis demonstrated that HoAGL6 transcript was detected in inflorescence buds, tepals, carpels and ovules, but not in stamina, leaves or scales. Transgenic Arabidopsis plants ectopically expressing HoAGL6 exhibited novel phenotypes of significantly reduced plant size, extremely early flowering, and losing inflorescence indeterminacy. In addition, wide homeotic conversion of sepals, petals, and leaves into carpel-like or ovary structures, and disappearance or number reduction of stamens in 35S::HoAGL6 Arabidopsis plants were also observed. RT-PCR analysis indicated that the expressions of flowering time gene SOC1 and flower meristem identity gene LFY were significantly up-regulated in 35S::HoAGL6 transgenic Arabidopsis plants, and the expression levels of floral organ identity genes AG and SEP1 in leaves were also elevated. These results indicated that HoAGL6 was involved in the regulation of flower transition and flower organ formation. 关键词：AGL6 homologue, flower development, FLOWERING time, MADS-BOX genes, Hyacinthus ORIENTALIS

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Ectopic expression of a hyacinth AGL6 homolog caused earlier flowering and homeotic conversion in Arabidopsis

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