Estudo de efeitos dos genes opaque-2, shruken e shrunken-2 durante a germinação do milho

AUTOR(ES)
DATA DE PUBLICAÇÃO

1983

RESUMO

Abstract: Three isogenic inbreads of maize were used to study the effect of the opaque-2 (o2)~ shrunken (sh) and shrunken-2 (sh2) genes during germination. One inbread had two types of endosperm; one homozygote for the 02 gene and the other for the 02 gene. A second line had also two different endosperms: one homozygote for the sh allele and the other for the Sh allele. Finnaly, a third inbread line with also two types of endosperms; one homozygote for the sh2 gene and the other for the allele.Each mutant and his normal endosperm were produced in a same ear of an inbread by self "pollnating of a heterozigote plantfor the pertinent locus. Fresh and dry weight and nitrogen content were analysed daily in both endosperms and seedlings, along ten days, during germination at 270C in the dark. The aminoacid metabolism were an alysed in both endosperms and seedlings. Data showed that the amount of water absorbed by the endosperm during imbibition depends on both physical and chemical characteristics of this tissue. The mutant endosperms with high sugar content and therefore with low osmotic potential, in decreasing order sh2, sh and 02, were also the ones that showed high increases in endosperms fresh weight. ...Note: The complete abstract is available with the full electronic digital thesis or dissertations

ASSUNTO(S)

milho - pesquisa germinação

ACESSO AO ARTIGO

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