biologia plantarum

International journal on Plant Life established by Bohumil Nìmec in 1959

Biologia plantarum 45:353-357, 2002 | DOI: 10.1023/A:1016257315091

Germplasm Preservation of Wild Arachis Species through Culture of Shoot Apices and Axillary Buds from In Vitro Plants

R.F. Gagliardi1, G.P. Pacheco1, J.F.M. Valls2, E. Mansur1
1 Laboratório de Micropropagação e Transformação de Plantas, UERJ, Rio de Janeiro, Brazil
2 EMBRAPA/CENARGEN, Brasília, Brazil

A study was conducted to evaluate in vitro techniques for germplasm preservation of wild species of Arachis. Nodal segments excised from in vitro-grown plants of A. retusa, A. macedoi and A. burchellii were used to examine the effects of explant position and age of the donor plant. Explants were excised from plants maintained in culture for 30, 60, 90 or 180 d, numbered I - V from top to bottom and cultured on MS medium supplemented with 2.7 µM NAA or different BAP concentrations (0, 4.4, 13.2 and 22 µM). The age of the donor plant has not influenced the responses of the four genotypes studied. In contrast, shoot regeneration ability was significantly affected by the original explant position, decreasing from top to bottom. In media supplemented with different BAP concentrations, multishoot formation was induced from apical segments at low frequencies (10 - 20%) and segments of all positions originated calluses at the explant basis after 30 d of culture. The culture of nodal segments in the presence of 2.7 µM NAA as the sole growth regulator is recommended for the multiplication of in vitro collections of wild groundnut species in order to avoid callusing and adventitious shoot formation.

Keywords: clonal multiplication; groundnut; in vitro regeneration; nodal explants; peanut
Subjects: Arachis burchellii; Arachis macedoi; Arachis retusa; auxins; clonal multiplication; cytokinins; germplasm preservation, in vitro culture; groundnut, germplasm preservation; in vitro culture, clonal propagation; in vitro culture, germplasm preservation; in vitro culture, nutrient media modification; in vitro culture, plant regeneration, organogenesis; in vitro culture, shoot production from nodal explants; peanut, germplasm preservation

Published: September 1, 2002  Show citation

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Gagliardi, R.F., Pacheco, G.P., Valls, J.F.M., & Mansur, E. (2002). Germplasm Preservation of Wild Arachis Species through Culture of Shoot Apices and Axillary Buds from In Vitro Plants. Biologia plantarum, 45(3), 353-357. doi: 10.1023/A:1016257315091
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