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  <controlfield tag="003">BR-BrBNA</controlfield>
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  <controlfield tag="008">240320b2012    bl.qr|pooa||| 00| 0 por |</controlfield>
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    <subfield code="a">Spandre, P.</subfield>
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    <subfield code="a">Zanette, F.</subfield>
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    <subfield code="a">Biasi, L.A.</subfield>
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    <subfield code="a">Koheler, H.S.</subfield>
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    <subfield code="a">Niesing, P.C.</subfield>
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  <datafield tag="245" ind1=" " ind2=" ">
    <subfield code="a">Estaquia caulinar de gua&#xE7;atonga (Casearia sylvestris Swartz) nas quatro esta&#xE7;&#xF5;es do ano, com aplica&#xE7;&#xE3;o de diferentes concentra&#xE7;&#xF5;es de AIB</subfield>
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    <subfield code="a">Publica&#xE7;&#xE3;o on-line; 34 ref.; 6 tables; Summaries (En, Pt)</subfield>
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RESUMO: 

Casearia sylvestris Swartz (Salicaceae) ou gua&#xE7;atonga &#xE9; uma &#xE1;rvore nativa do M&#xE9;xico,
da Am&#xE9;rica Central, e da Am&#xE9;rica do Sul, com grande import&#xE2;ncia ecol&#xF3;gica, farmacol&#xF3;gica, e
comercial. No entanto, como a maioria das esp&#xE9;cies nativas de interesse medicinal no Brasil, a
gua&#xE7;atonga n&#xE3;o &#xE9; cultivada comercialmente, sendo obtida por extrativismo. O presente trabalho
foi conduzido com o objetivo de testar um protocolo de propaga&#xE7;&#xE3;o vegetativa de gua&#xE7;atonga por
meio da estaquia, visando identificar qual a melhor esta&#xE7;&#xE3;o do ano para o enraizamento de
estacas e avaliar o efeito da utiliza&#xE7;&#xE3;o do regulador vegetal &#xE1;cido indolbut&#xED;rico (AIB). No outono,
inverno e primavera de 2007, e no ver&#xE3;o de 2008, estacas caulinares semilenhosas de 12-14 cm
de comprimento e com duas folhas foram preparadas e tratadas com AIB (0, 1000, 2000 e 3000
mg L-1), em solu&#xE7;&#xE3;o alco&#xF3;lica, atrav&#xE9;s da imers&#xE3;o r&#xE1;pida por 10 segundos da base das estacas,
e foram plantadas em tubetes contendo substrato Plantmax HT&#xAE; em casa-de-vegeta&#xE7;&#xE3;o sob
nebuliza&#xE7;&#xE3;o intermitente. O delineamento experimental utilizado foi o inteiramente casualizado,
com 4 repeti&#xE7;&#xF5;es, 4 tratamentos, e 16 estacas por parcela. Todos os experimentos foram avaliados
ap&#xF3;s 90 dias, sendo que para dois deles (primavera 2007 e ver&#xE3;o 2008) prolongou-se o tempo de
perman&#xEA;ncia em casa-de-vegeta&#xE7;&#xE3;o para melhor desenvolvimento das ra&#xED;zes. Foram avaliados
os par&#xE2;metros: porcentagem de estacas enraizadas, porcentagem de estacas vivas (com calos
e sem ra&#xED;zes, sem calos e sem ra&#xED;zes), porcentagem de folhas retidas, porcentagem de estacas
mortas, n&#xFA;mero de ra&#xED;zes, comprimento das tr&#xEA;s maiores ra&#xED;zes (cm), e m&#xE9;dia da massa seca
das ra&#xED;zes (mg). N&#xE3;o ocorreu enraizamento nas estacas retiradas no outono e no inverno. Com
as estacas retiradas na primavera obteve-se 39,1% de enraizamento. Estacas coletadas no
ver&#xE3;o n&#xE3;o responderam como o esperado, apresentando, ap&#xF3;s 240 dias, 6,3% de enraizamento
no tratamento com 3000 mg L-1 de AIB. O AIB at&#xE9; 3000 mg L-1 n&#xE3;o estimulou o enraizamento de
estacas de gua&#xE7;atonga e a melhor esta&#xE7;&#xE3;o do ano para a estaquia &#xE9; a primavera.

Palavras-chave: Casearia sylvestris Swartz, enraizamento, auxina, sazonalidade</subfield>
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  <datafield tag="520" ind1=" " ind2=" ">
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ABSTRACT: 

Stem cuttings of &#x201C;gua&#xE7;atonga&#x201D; (Casearia sylvestris Swartz) in the four seasons
of the year with the use of different IBA concentrations. Casearia sylvestris Swartz
(Salicaceae), or &#x201C;gua&#xE7;atonga&#x201D;, is a tree native to Mexico and Central and South America, with
great ecological, pharmacological and commercial relevance. Similarly to most native species of
medicinal interest in Brazil, &#x201C;gua&#xE7;atonga&#x201D; is not commercially cultivated and is obtained by means
of extraction. The aim of this study was to test a protocol for the vegetative propagation of
&#x201C;gua&#xE7;atonga&#x201D; by means of stem cutting, identifying the best season for stem rooting and assessing
the effect of using the growth regulator indolebutyric acid (IBA). In the fall, winter and spring 2007
and summer 2008, semi-hardwood cuttings with 12-14 cm length and two leaves were prepared
and treated with IBA (0, 1000, 2000 and 3000 mg L-1), in alcohol solution, by rapidly immersing for
10 seconds the base of cuttings and planting them in tubes containing Plantmax HT&#xAE; in greenhouse
under intermittent nebulization. Experimental design was completely randomized with 4 replicates,
4 treatments and 16 cuttings per plot. All experiments were evaluated after 90 days, and for two of
them the time of maintenance in greenhouse was prolonged in order to improve root development.
The following parameters were evaluated: percentage of rooted cuttings, percentage of live cuttings
(with callus and without roots, without callus and without roots), percentage of retained leaves,
percentage of dead cuttings, number of roots, length of the largest roots (cm) and mean dry mass
of roots (mg). There was no rooting on cuttings collected during the fall and the winter. For cuttings
collected in the spring, 39.1% rooting was obtained. Cuttings collected in the summer did not
show the expected results, presenting after 240 days 6.3% rooting when treated with 3000
mg L-1 IBA. Up to 3000 mg L-1, IBA did not stimulate the rooting of &#x201C;gua&#xE7;atonga&#x201D; cuttings and the
best season for cutting is spring.

Key words: Casearia sylvestris Swartz, rooting, auxin, seasonality</subfield>
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  <datafield tag="650" ind1=" " ind2=" ">
    <subfield code="a">CASEARIA SYLVESTRIS</subfield>
  </datafield>
  <datafield tag="650" ind1=" " ind2=" ">
    <subfield code="a">ENRAIZAMENTO</subfield>
  </datafield>
  <datafield tag="650" ind1=" " ind2=" ">
    <subfield code="a">AUXINA</subfield>
  </datafield>
  <datafield tag="650" ind1=" " ind2=" ">
    <subfield code="a">VARIA&#xC7;&#xC3;O SAZONAL</subfield>
  </datafield>
  <datafield tag="773" ind1="0" ind2=" ">
    <subfield code="0">3543</subfield>
    <subfield code="9">313916</subfield>
    <subfield code="d">Botucatu-SP Instituto de Bioci&#xEA;ncias - Departamento de Qu&#xED;mica e Bioqu&#xED;mica 1998</subfield>
    <subfield code="o">2024-0186</subfield>
    <subfield code="t">Revista Brasileira de Plantas Medicinais (Brazil)</subfield>
    <subfield code="x">1516-0572</subfield>
    <subfield code="g">v. 14(3) p. 529-536; (2012)</subfield>
    <subfield code="w">BR2024000368</subfield>
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    <subfield code="u">https://www.scielo.br/j/rbpm/a/VD8RL6CxSJJsTmZNT75dwDJ/?format=pdf&amp;lang=pt</subfield>
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    <subfield code="c">Anal&#xED;tica</subfield>
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    <subfield code="c">298866</subfield>
    <subfield code="d">298866</subfield>
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