Abstract 2464 from Intl. Bot. Congress 1999

ibclogo XVI International Botanical Congess

Abstract Number: 2464
Poster No. = 1834

GENE ORGANIZATION OF CHLOROPLAST GENOME FROM A FERN PSILOTUM NUDUM

T. Wakasugi, A. Nishikawa, K. Yamada* and M. Sugiura#(*Dept of Biology, Toyama University, Toyama 930-8555, Japan, # Center for Gene Research, Nagoya University, Nagoya 464-8602, Japan)

The complete nucleotide sequence (138,829 bp) of the whisk fern (Psilotum nudum) chloroplast DNA has been determined. It contains 4 rRNA genes and 33 tRNA genes. The tRNA Ser (CGA) gene has not been found in any other chloroplast genome of land plants. Seventy-two protein genes and 9 conserved ORFs are also found. The gene organization shows an intermediate feature between bryophyta and gymnosperm. One of the striking features is the loss of all 3 genes (chlB, chlL, chlN) for light-independent chlorophyll biosynthesis. The overall gene arrangement is similar to that of tobacco, except the 4.5 kbp region from trnT-psbDC-trnG is inversely oriented. Phylogeny of ferns estimated from the gene arrangement will be discussed.

HTML-Version made 7. July 1999 by Kurt Stüber

GENE ORGANIZATION OF CHLOROPLAST GENOME FROM A FERN PSILOTUM NUDUM

T. Wakasugi*, A. Nishikawa*, K. Yamada* and M. Sugiura#(*Dept of Biology, Toyama University, Toyama 930-8555, Japan, # Center for Gene Research, Nagoya University, Nagoya 464-8602, Japan)

T. Wakasugi, A. Nishikawa, K. Yamada* and M. Sugiura#(*Dept of Biology, Toyama University, Toyama 930-8555, Japan, # Center for Gene Research, Nagoya University, Nagoya 464-8602, Japan)