Avaliação sazonal da atividade da fenilalanina amonia-liase e dos teores de fenois e taninos totais em Byrsonima verbascifolia Rich. ex. A. Juss.: uma especie medicinal do cerrado.

CASTRO, A. H. F.; ALVARENGA, A. A.; SOARES, A. M.; YOUNG, M. C. M.; PURCINO, A. A. C.; ANTONIO ALVARO CORSETTI PURCINO, CNPMS.

Avaliação sazonal da atividade da fenilalanina amonia-liase e dos teores de fenois e taninos totais em Byrsonima verbascifolia Rich. ex. A. Juss.: uma especie medicinal do cerrado.

An experiment was conducted, ever month, from november, 2001 to september, 2002 in order to investigate the influence of seasonal variation of physical environment on gas exchange, on leaf water state, on the phenylalanine ammonia-lyase activity and on the total phenolic and tannin contents of murici,. The used area was a praire with a physionomy of Cerrado stricto sensu, located in Ijaci, south of the State of Minas Gerais. For the evaluation, plants Were selected with an average height of 2.70 +/- 0.21 m and an average basal diameter of 0.15 +/- 0.04 m. Leaf potential at 7 and 12 am and gas exchange at 10 and 12 am was evaluated ever month. The results showed that the leaf water potential was not significant seasonal variations indicating that the plants were in similar water conditions in both dry and rainy seasons. Higher photosynthetic and transpiration rates-were observed during rainy season. The net photosynthesis showed higher in the morning, although no significant variations of transpiration on the evaluating hours were observed. The stomatal conductance reached similar Values in both seasons, suggesting a participation of non-stomatal factors on the seasonal variation observed for the-gas exchange. It. was also observed significant seasonal variations on enzyme activity and total tannins contents. The increase of the phenylalanine ammonia-lyase activity and decrease Of the total tannins contents were characteristic of the dry season. The levels of total phenolics. had not varied significantly during the dry and rainy seasons, while the total tannin contents followed the photosynthetic response of plants, the enzyme activity was much more influenced by environmental conditions.

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Bibliographic Details
Main Authors:	CASTRO, A. H. F., ALVARENGA, A. A., SOARES, A. M., YOUNG, M. C. M., PURCINO, A. A. C.
Other Authors:	ANTONIO ALVARO CORSETTI PURCINO, CNPMS.
Format:	Artigo de periódico biblioteca
Language:	pt_BR por
Published:	2006-01-20
Subjects:	Sazonalidade., Cerrado, Murici, Tanino.,
Online Access:	http://www.alice.cnptia.embrapa.br/alice/handle/doc/489112
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id	dig-alice-doc-489112
record_format	koha
spelling	dig-alice-doc-4891122017-08-15T23:39:10Z Avaliação sazonal da atividade da fenilalanina amonia-liase e dos teores de fenois e taninos totais em Byrsonima verbascifolia Rich. ex. A. Juss.: uma especie medicinal do cerrado. CASTRO, A. H. F. ALVARENGA, A. A. SOARES, A. M. YOUNG, M. C. M. PURCINO, A. A. C. ANTONIO ALVARO CORSETTI PURCINO, CNPMS. Sazonalidade. Cerrado Murici Tanino. An experiment was conducted, ever month, from november, 2001 to september, 2002 in order to investigate the influence of seasonal variation of physical environment on gas exchange, on leaf water state, on the phenylalanine ammonia-lyase activity and on the total phenolic and tannin contents of murici,. The used area was a praire with a physionomy of Cerrado stricto sensu, located in Ijaci, south of the State of Minas Gerais. For the evaluation, plants Were selected with an average height of 2.70 +/- 0.21 m and an average basal diameter of 0.15 +/- 0.04 m. Leaf potential at 7 and 12 am and gas exchange at 10 and 12 am was evaluated ever month. The results showed that the leaf water potential was not significant seasonal variations indicating that the plants were in similar water conditions in both dry and rainy seasons. Higher photosynthetic and transpiration rates-were observed during rainy season. The net photosynthesis showed higher in the morning, although no significant variations of transpiration on the evaluating hours were observed. The stomatal conductance reached similar Values in both seasons, suggesting a participation of non-stomatal factors on the seasonal variation observed for the-gas exchange. It. was also observed significant seasonal variations on enzyme activity and total tannins contents. The increase of the phenylalanine ammonia-lyase activity and decrease Of the total tannins contents were characteristic of the dry season. The levels of total phenolics. had not varied significantly during the dry and rainy seasons, while the total tannin contents followed the photosynthetic response of plants, the enzyme activity was much more influenced by environmental conditions. 2011-04-10T11:11:11Z 2011-04-10T11:11:11Z 2006-01-20 2005 2018-05-29T11:11:11Z Artigo de periódico Revista Brasileira de Plantas Medicinais, Botucatu, v. 7, n. 3, p. 45-55, 2005. http://www.alice.cnptia.embrapa.br/alice/handle/doc/489112 pt_BR por openAccess
institution	EMBRAPA
collection	DSpace
country	Brasil
countrycode	BR
component	Bibliográfico
access	En linea
databasecode	dig-alice
tag	biblioteca
region	America del Sur
libraryname	Sistema de bibliotecas de EMBRAPA
language	pt_BR por
topic	Sazonalidade. Cerrado Murici Tanino. Sazonalidade. Cerrado Murici Tanino.
spellingShingle	Sazonalidade. Cerrado Murici Tanino. Sazonalidade. Cerrado Murici Tanino. CASTRO, A. H. F. ALVARENGA, A. A. SOARES, A. M. YOUNG, M. C. M. PURCINO, A. A. C. Avaliação sazonal da atividade da fenilalanina amonia-liase e dos teores de fenois e taninos totais em Byrsonima verbascifolia Rich. ex. A. Juss.: uma especie medicinal do cerrado.
description	An experiment was conducted, ever month, from november, 2001 to september, 2002 in order to investigate the influence of seasonal variation of physical environment on gas exchange, on leaf water state, on the phenylalanine ammonia-lyase activity and on the total phenolic and tannin contents of murici,. The used area was a praire with a physionomy of Cerrado stricto sensu, located in Ijaci, south of the State of Minas Gerais. For the evaluation, plants Were selected with an average height of 2.70 +/- 0.21 m and an average basal diameter of 0.15 +/- 0.04 m. Leaf potential at 7 and 12 am and gas exchange at 10 and 12 am was evaluated ever month. The results showed that the leaf water potential was not significant seasonal variations indicating that the plants were in similar water conditions in both dry and rainy seasons. Higher photosynthetic and transpiration rates-were observed during rainy season. The net photosynthesis showed higher in the morning, although no significant variations of transpiration on the evaluating hours were observed. The stomatal conductance reached similar Values in both seasons, suggesting a participation of non-stomatal factors on the seasonal variation observed for the-gas exchange. It. was also observed significant seasonal variations on enzyme activity and total tannins contents. The increase of the phenylalanine ammonia-lyase activity and decrease Of the total tannins contents were characteristic of the dry season. The levels of total phenolics. had not varied significantly during the dry and rainy seasons, while the total tannin contents followed the photosynthetic response of plants, the enzyme activity was much more influenced by environmental conditions.
author2	ANTONIO ALVARO CORSETTI PURCINO, CNPMS.
author_facet	ANTONIO ALVARO CORSETTI PURCINO, CNPMS. CASTRO, A. H. F. ALVARENGA, A. A. SOARES, A. M. YOUNG, M. C. M. PURCINO, A. A. C.
format	Artigo de periódico
topic_facet	Sazonalidade. Cerrado Murici Tanino.
author	CASTRO, A. H. F. ALVARENGA, A. A. SOARES, A. M. YOUNG, M. C. M. PURCINO, A. A. C.
author_sort	CASTRO, A. H. F.
title	Avaliação sazonal da atividade da fenilalanina amonia-liase e dos teores de fenois e taninos totais em Byrsonima verbascifolia Rich. ex. A. Juss.: uma especie medicinal do cerrado.
title_short	Avaliação sazonal da atividade da fenilalanina amonia-liase e dos teores de fenois e taninos totais em Byrsonima verbascifolia Rich. ex. A. Juss.: uma especie medicinal do cerrado.
title_full	Avaliação sazonal da atividade da fenilalanina amonia-liase e dos teores de fenois e taninos totais em Byrsonima verbascifolia Rich. ex. A. Juss.: uma especie medicinal do cerrado.
title_fullStr	Avaliação sazonal da atividade da fenilalanina amonia-liase e dos teores de fenois e taninos totais em Byrsonima verbascifolia Rich. ex. A. Juss.: uma especie medicinal do cerrado.
title_full_unstemmed	Avaliação sazonal da atividade da fenilalanina amonia-liase e dos teores de fenois e taninos totais em Byrsonima verbascifolia Rich. ex. A. Juss.: uma especie medicinal do cerrado.
title_sort	avaliação sazonal da atividade da fenilalanina amonia-liase e dos teores de fenois e taninos totais em byrsonima verbascifolia rich. ex. a. juss.: uma especie medicinal do cerrado.
publishDate	2006-01-20
url	http://www.alice.cnptia.embrapa.br/alice/handle/doc/489112
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Avaliação sazonal da atividade da fenilalanina amonia-liase e dos teores de fenois e taninos totais em Byrsonima verbascifolia Rich. ex. A. Juss.: uma especie medicinal do cerrado.

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