Micropropagation and assessment of somaclonal variation in Galanthus transcaucasicus in vitro plantlets
Abstract In vitro culture of twin-scaling explants of Galanthus transcaucasicus with different concentrations of plant growth regulators (PGRs) including 0.5, 1, 2, 3, 4, 6, 8, and 10 mg L-1 naphthaleneacetic acid (NAA) and 0.5, 1, 2, 3, and 4 mg L-1 benzyladenine (BA) was studied. After 18 weeks, t...
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Published in | Ornamental Horticulture (Campinas) Vol. 27; no. 4; pp. 505 - 515 |
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Main Authors | , , , |
Format | Journal Article |
Language | English |
Published |
Sociedade Brasileira de Floricultura e Plantas Ornamentais
01.12.2021
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Subjects | |
Online Access | Get full text |
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Summary: | Abstract In vitro culture of twin-scaling explants of Galanthus transcaucasicus with different concentrations of plant growth regulators (PGRs) including 0.5, 1, 2, 3, 4, 6, 8, and 10 mg L-1 naphthaleneacetic acid (NAA) and 0.5, 1, 2, 3, and 4 mg L-1 benzyladenine (BA) was studied. After 18 weeks, the number of regenerated bulblets and intensity of callus was measured. Subsequently, bulblets were transferred to a medium with 0.5, 1, 2, 3, and 4 mg L-1 NAA and 0.5, 1, 2, 3, and 4 mg L-1 BA and, after 15 weeks, the bulblets length and diameter were measured. The highest intensity of callus was obtained on 4 mg L-1 NAA or 8 mg L-1 NAA with 1 mg L-1 BA. The highest number of regenerated bulblets was detected with 6 mg L-1 NAA and 2 mg L-1 BA. The highest diameter of bulblets occurred on four mgL-1 NAA (9.4 mm), while the lowest was observed on 0.5 mg L-1 BA (1.83 mm). The analysis of genetic variation using ISSR revealed that there was no somaclonal variation among the regenerated plants from BA and low level of NAA, but there was a significant somaclonal variation at high concentrations of NAA.
Resumo Objetivou-se estudar o cultivo in vitro de explantes de dupla escala de Galanthus transcaucasicus com diferentes concentrações de reguladores de crescimento: 0,5; 1; 2; 3; 4; 6; 8 e 10 mg L-1 de ácido naftalenoacético (ANA) e 0,5; 1; 2; 3 e 4 mg L-1 de benziladenina (BA). Após 18 semanas foram avaliados o número de bulbilhos regenerados e a porcentagem do calo. Posteriormente, os bulbilhos foram transferidos para um meio com 0,5; 1; 2; 3 e 4 mg L-1 de ANA e 0,5; 1; 2; 3 e 4 mg L-1 de BA e após 15 semanas foram medidos o comprimento dos bulbos e diâmetro. A maior intensidade de calo foi obtida com 4 mg L-1 de ANA ou 8 mg L-1 de ANA com 1 mg L-1 de BA. O maior número de bulbilhos regenerados foi obtido com 6 mg L-1 de ANA e 2 mg L-1 de BA. O maior diâmetro dos bulbilhos ocorreu com 4 mg L-1 ANA (9,4 mm), enquanto o menor foi observado com 0,5 mg L-1 BA (1,83 mm). A análise da variação genética usando ISSR não revelou variação somaclonal entre as plantas regeneradas a partir de BA e baixa concentração de ANA, mas houve variação somaclonal significativa em altas concentrações de ANA. |
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ISSN: | 2447-536X 2447-536X |
DOI: | 10.1590/2447-536x.v27i4.2320 |