Since the first edition of our book "Tissue Culture in Fores try" in 1982 we have witnessed remarkable advances in cell and tissue culture technologies with woo

2. IMPORTANCE OF NITROGEN METABOLISM 2. 1. Range of naturally occurring nitrogenous components in forest trees 2. 2. Gene expression and mapping 2. 3. Metabolic

2. 2. Plant materials 2. 3. Pregrowth conditions 2. 4. Cryoprotectant treatment 2. 5. Freezing 2. 5. 1. Slow freezing 2. 5. 2. Rapid freezing 2. 5. 3. Droplet f

This symposium is the third in a series featuring the propaga tion of higher plants through tissue culture. The first of these symposia, entitled "A Bridge Betw