Sementes. Jones et al. 2013, The Molecular Life of Plants. Wiley-Blackwell ciclo das angiospermas.
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Transcript of Sementes. Jones et al. 2013, The Molecular Life of Plants. Wiley-Blackwell ciclo das angiospermas.
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Sementes
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Jones et al. 2013, The Molecular Life of Plants. Wiley-Blackwell
ciclo das angiospermas
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ovário fruto
núcleos polares endosperma (3n)
oosfera embrião (2n)
integumentos tegumentos (2n)
óvulo semente
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osmótico osmótico
Vicia faba
Zn
Ca
P
* histodiferenciação*
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endosperma
testa
embrião
Estruturas típicas de uma semente
cotilédones
embrião(eixo)
- efetuador de crescimento- fonte de energia potencial- interface
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Jones et al. 2013, The Molecular Life of Plants. Wiley-Blackwell
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Micrópila
Hilo
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http://extension.entm.purdue.edu/pestcrop/2010/issue17/
88% amido<1% lipídios7% proteínas
9% amido31% lipídios19% proteínas
endosperma
escutelo/embriao
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(globulinas)(prolaminas, glutelinas)
(trigo, arroz, milho,...)
(soja, ervilha, feijão...)
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Jones et al. 2013
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características morfo-fisiológicas
distribuição de pesoteor de umidade
viabilidadeembebição
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Brasil, 2009, RAS.
Teor de umidade
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Viabilidade: teste de tetrazólio
Phaseolus vulgaris L.
Brasil, 2009, RAS.
Zea mays L.
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Dinâmica de embebição de sementes de M. chartacea escarificadas e intatas
Escobar, 2014
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http://www.agricultura.gov.br/arq_editor/file/2946_regras_analise__sementes.pdf