Matk
Mostrando 13-19 de 19 artigos, teses e dissertações.
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13. Taxonomia e filogenia e dimerostemma, e sua relação intergenerica na subtribo Ecliptinae (Asteraceae : Heliantheae)
Sequence data for nine regions of the chloroplast genome have been obtained for 34 of the 49 genera of subtribe Ecliptinae of tribe Heliantheae. The analyzed regions include gene matK; introns petB, petD, trnL; and intergenic spacers ndhI-ndhG, rpl20-rps12, accD-rbcL, trnT-trnL, trnL-trnF. The bootstrap consensus tree reveals a monophyletic subtribe Ecliptin
Publicado em: 2004
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14. RNA-binding activity of the matK protein encoded by the chloroplast trnK intron from mustard (Sinapis alba L.).
The chloroplast trnK gene for tRNALys(UUU) from mustard contains a 2574 bp group II intron with a long open reading frame for 524 amino acids. The encoded polypeptide appears to be structurally related to mitochondrial maturases which are involved in splicing. To study the properties of the intron encoded protein, we overexpressed the trnK ORF as a beta-gala
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15. Phylogeny of rice genomes with emphasis on origins of allotetraploid species
The rice genus, Oryza, which comprises 23 species and 9 recognized genome types, represents an enormous gene pool for genetic improvement of rice cultivars. Clarification of phylogenetic relationships of rice genomes is critical for effective utilization of the wild rice germ plasm. By generating and comparing two nuclear gene (Adh1 and Adh2) trees and a chl
The National Academy of Sciences.
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16. The complete nucleotide sequence of the hornwort (Anthoceros formosae) chloroplast genome: insight into the earliest land plants
It is generally believed that bryophytes are the earliest land plants. However, the phylogenetic relationships among bryophytes, including mosses, liverworts and hornworts, are not clearly resolved. To obtain more information on the earliest land plants, we determined the complete nucleotide sequence of the chloroplast genome from the hornwort Anthoceros for
Oxford University Press.
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17. Evolutionary relationships among group II intron-encoded proteins and identification of a conserved domain that may be related to maturase function.
Many group II introns encode reverse transcriptase-like proteins that potentially function in intron mobility and RNA splicing. We compared 34 intron-encoded open reading frames and four related open reading frames that are not encoded in introns. Many of these open reading frames have a reverse transcriptase-like domain, followed by an additional conserved
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18. Multiple origins of crassulacean acid metabolism and the epiphytic habit in the Neotropical family Bromeliaceae
The large Neotropical family Bromeliaceae presents an outstanding example of adaptive radiation in plants, containing a wide range of terrestrial and epiphytic life-forms occupying many distinct habitats. Diversification in bromeliads has been linked to several key innovations, including water- and nutrient-impounding phytotelmata, absorptive epidermal trich
National Academy of Sciences.
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19. Comparative analysis of splicing of the complete set of chloroplast group II introns in three higher plant mutants.
The barley mutant albostrians and the maize mutants crs1 and crs2 are defective in the splicing of various plastid group II introns. By analysing tRNA precursors and several mRNAs not previously examined, the investigation of in vivo splicing defects in these mutants has been completed. The albostrians mutation causes the loss of plastid ribosomes resulting