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Registro Completo |
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Biblioteca(s): |
Embrapa Mandioca e Fruticultura. |
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Data corrente: |
27/05/1997 |
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Data da última atualização: |
17/05/2023 |
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Autoria: |
RAJA, V. G.; KOUL, K. K.; RAINA, S. N.; PARIDA, A. |
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Afiliação: |
Universidade of Delhi, Delhi-India. |
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Título: |
Ploidy-dependent genomic stability in the tissue cultures of ornamental phlox drummondii Hook. |
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Ano de publicação: |
1992 |
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Fonte/Imprenta: |
Plant cell reports v. 12, p. 12-17, 1992. |
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Idioma: |
Inglês |
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Conteúdo: |
Comparisons of the chromosome numbres, 2C nuclear DNA amounts and karyomorphology were made in explant cultures of diploid (2n = 2x = 14) and autotetraploid (2n = 4x = 28) Phox drummondii. In 6-36 week old calli derived from diploid internodal segment explants, and in cells of root tips regenerated from such callus, marked differences were observed in chromesome number. The chromosome numbers ranged from 2n = 14 to 2n = 100 and DNA amounts from 8.20 to 63.20 pg in the diploid derived callus, while the extent of variation was much reduced in the regenerated roots. In contrast, the autotetraploid cultures were characterised by the maintenance of the same chromosome number and DNA amounts as the mother plant. Modified chromosome structures were not apparent in any of the cultures. The possible reasons for the chromosomal instability at the diploid level and stability at the tetraploid level are discussed. |
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Thesagro: |
Cultura de Tecido. |
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Categoria do assunto: |
-- |
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Marc: |
LEADER 01414naa a2200169 a 4500
001 1647873
005 2023-05-17
008 1992 bl uuuu u00u1 u #d
100 1 $aRAJA, V. G.
245 $aPloidy-dependent genomic stability in the tissue cultures of ornamental phlox drummondii Hook.$h[electronic resource]
260 $c1992
520 $aComparisons of the chromosome numbres, 2C nuclear DNA amounts and karyomorphology were made in explant cultures of diploid (2n = 2x = 14) and autotetraploid (2n = 4x = 28) Phox drummondii. In 6-36 week old calli derived from diploid internodal segment explants, and in cells of root tips regenerated from such callus, marked differences were observed in chromesome number. The chromosome numbers ranged from 2n = 14 to 2n = 100 and DNA amounts from 8.20 to 63.20 pg in the diploid derived callus, while the extent of variation was much reduced in the regenerated roots. In contrast, the autotetraploid cultures were characterised by the maintenance of the same chromosome number and DNA amounts as the mother plant. Modified chromosome structures were not apparent in any of the cultures. The possible reasons for the chromosomal instability at the diploid level and stability at the tetraploid level are discussed.
650 $aCultura de Tecido
700 1 $aKOUL, K. K.
700 1 $aRAINA, S. N.
700 1 $aPARIDA, A.
773 $tPlant cell reports$gv. 12, p. 12-17, 1992.
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Registro original: |
Embrapa Mandioca e Fruticultura (CNPMF) |
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