ibclogo XVI International Botanical Congess


Abstract Number: 2822
Poster No. = 266


MADS-BOX GENES FROM LYCOPODIUM ANNOTINUM


Mats Svensson, Peter Engström. EBC, Uppsala univ. Sweden


MADS-box genes are known from angiosperms, conifers and the fern Ceratopteris. The lycopods constitute the sister-group to all other vascular plants. In order to track the duplication history of the MADS-box gene family further down in the phylogeny of plants, such genes were isolated from Lycopodium annotinum. These were shown not to be closely related to previously known MADS-box genes. LAMB1 (L. Annotinum Mads Box 1) share with other plant MADS-box genes the possession of a K-box, but have several unique features of the sequence. LAMB 2-6 show greater structural similarity to previously known plant MADS-box genes,and form a clade not closely related to LAMB1.The exon/intron organization of LAMB4 is similar to that in conifers and angiosperms, but additional introns are present in LAMB1. RT-PCR show that LAMB1 is expressed only in strobili. LAMB 2-6 are expressed in a broader range of tissues.


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