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	Provedor de dados Braz. J. Plant Physiol. (2) Autor Festucci-Buselli,Reginaldo A. (2) Otoni,Wagner C. (2) Barbosa,Luiz Cláudio A. (1) Contim,Luis A. S. (1) Joshi,Chandrashekhar P. (1) Stuart,Jeff J. (1) Vieira,Roberto F. (1) Mais... Palavra-chave 20-hydroxyecdysone (1) Amaranthaceae (1) Brazilian ginseng (1) Cellulose biosynthesis (1) Cellulose synthase (CESA) (1) Cellulose synthase complex (CelS) (1) Microfibril (1) Pfaffia glomerata (Spreng.) Pedersen (1) Phytochemical analysis (1) Phytoecdysteroid (1) Terpenes (1) Mais... Tipo do documento Info:eu-repo/semantics/article (2) Ano 2008 (1) 2007 (1) País Brazil (2) Idioma Inglês (2)		Ordenar por:  Relevância Autor Título Ano Registros recuperados: 2 Primeira ... 1 ... Última Level and distribution of 20-hydroxyecdysone during Pfaffia glomerata development Braz. J. Plant Physiol. Festucci-Buselli,Reginaldo A.; Contim,Luis A. S.; Barbosa,Luiz Cláudio A.; Stuart,Jeff J.; Vieira,Roberto F.; Otoni,Wagner C.. The ecdysteroid 20-hydroxyecdysone (20E) is a steroid hormone found in insects and few plants. To analyze its temporal and spatial distribution in Pfaffia glomerata (Amaranthaceae), we selected among 71 accessions, the accession 13 which showed the highest root 20E total quantity (1.48 g/plant root). The 20E was constantly detected in flowers, leaves, stems, and roots, but its percentage was variable throughout its development. The highest 20E percentage was found in flowers (0.82%), roots (0.66%), leaves (0.60%), and stems (0.24%). While stems showed the least variable 20E percentage (0.13% - 0.24%), followed by roots (0.42% - 0.66%), and flowers (0.47% - 0.82%). Leaves showed the greatest 20E percentage variation (0.21% - 0.60%). The stem and leaves 20E... Tipo: Info:eu-repo/semantics/article Palavras-chave: Pfaffia glomerata (Spreng.) Pedersen; Amaranthaceae; Brazilian ginseng; Phytochemical analysis; Terpenes; Phytoecdysteroid; 20-hydroxyecdysone. Ano: 2008 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1677-04202008000400006 Structure, organization, and functions of cellulose synthase complexes in higher plants Braz. J. Plant Physiol. Festucci-Buselli,Reginaldo A.; Otoni,Wagner C.; Joshi,Chandrashekhar P.. Annually, plants produce about 180 billion tons of cellulose making it the largest reservoir of organic carbon on Earth. Cellulose is a linear homopolymer of beta(1-4)-linked glucose residues. The coordinated synthesis of glucose chains is orchestrated by specific plasma membrane-bound cellulose synthase complexes (CelS). The CelS is postulated to be composed of approximately 36 cellulose synthase (CESA) subunits. The CelS synthesizes 36 glucose chains in close proximity before they are further organized into microfibrils that are further associated with other cell wall polymers. The 36 glucose chains in a microfibril are stabilized by intra- and inter-hydrogen bonding which confer great stability on microfibrils. Several elementary microfibrils come... Tipo: Info:eu-repo/semantics/article Palavras-chave: Cellulose biosynthesis; Cellulose synthase (CESA); Cellulose synthase complex (CelS); Microfibril. Ano: 2007 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1677-04202007000100001 Registros recuperados: 2 Primeira ... 1 ... Última

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