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Oak somatic and gametic embryos maturation is affected by charcoal and specific aminoacids mixture

Author:
Beatriz Pintos, Jose A. Manzanera, M. Angeles Bueno
Source:
Annals of forest science 2010 v.67 no.2 pp. 205
ISSN:
1286-4560
Subject:
Quercus suber, acclimation, activated carbon, arginine, asparagine, benzyladenine, butyric acid, culture media, doubled haploids, forestry, genetic improvement, glutamine, indole butyric acid, nutrition, plantlets, somatic embryogenesis, sucrose, survival rate
Abstract:
• Development of both somatic and gametic embryogenesis has many applications in clonal forestry and genetic improvement, for instance as mass-propagation of genetically improved plants and production of pure lines through doubled-haploid plant regeneration from gametic embryos. • The goal of this work was to improve growth, maturation and plantlet regeneration of cork oak (Quercus suber L.) embryos from both somatic and gametic origin. • Activated charcoal promoted a significant increase in growth in terms of relative size and weight of both somatic and doubled-haploid embryos, as well as a more efficient control of secondary somatic embryogenesis during development. A significant interaction was also observed with amino acid nutrition. While some amino acids (i.e., glutamine, arginine or asparagine) did not show significant differences with the controls, a mixture of these three amino acids or gamma amino butyric acid stimulated embryo growth. The highest survival rate during acclimation of plantlets from both somatic and doubled-haploid origin was obtained when the embryos had been previously cultured on basal medium with 3% sucrose and 1% activated charcoal for two months at 4 °C and germinated on medium supplemented with 6-benzylaminopurine and indole-3-butyric acid. • We obtained more than 900 cork oak plantlets acclimated from several embryogenic lines, with a high survival rate, demonstrating that this methodology is applicable for large scale plantlet production. We also report the first regeneration of doubled-haploid plantlets in cork oak.
Agid:
1327379