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Protocols for Micropropagation of Woody Trees and Fruits

Protocols for Micropropagation of Woody Trees and Fruits

Protocols for Micropropagation of Woody Trees and Fruits

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DOUBLED-HAPLOID MICROPROPAGATION IN QUERCUS SUBER L.<br />

Figure 5. Scheme <strong>for</strong> the maturation <strong>of</strong> cork oak doubled-haploid embryos. A) Spontaneously<br />

induced doubled-haploid embryos. B) Doubled-haploid embryos induced by anti-mitotic<br />

agents. C) Doubled-haploid embryos on maturation medium. D) Cork oak doubled-haploid<br />

embryos alter one month on maturation medium.<br />

2.5. Maturation <strong>of</strong> Doubled-haploid Embryos<br />

Both the anther embryos that spontaneously duplicated their genome <strong>and</strong> those<br />

diploidized by the action <strong>of</strong> oryzalin were subjected to treatments inducing their<br />

maturation (Figure 5A,B). The addition <strong>of</strong> 1% activated charcoal to the maturation<br />

medium provoked a significant increment <strong>of</strong> both size <strong>and</strong> weight <strong>of</strong> the doubledhaploid<br />

embryos (Figure 5C,D).<br />

Immature translucent doubled-haploid embryos from either origin were cultured<br />

at the cotyledonar stage, about 3–4 mm size <strong>and</strong> 30 mg fresh weight, on SM basal<br />

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