Purine and pyrimidine nucleotide synthesis and metabolism.

1. Abstract 2. Introduction 3. Purine and pyrimidine metabolism during somatic embryogenesis 3.1. Maintenance of embryogenic tissue 3.1.1. Purine metabolism during maintenance of embryogenic tissue 3.1.2. Pyrimidine metabolism during maintenance of embryogenic tissue 3.2. Development of somatic embryos 3.2.1. Purine metabolism during development of somatic embryos 3.2.2. Pyrimidine metabolism during development of somatic embryos 3.3. Maturation of somatic embryos 3.3.1. Purine metabolism during maturation of somatic embryos 3.3.2. Pyrimidine metabolism during maturation of somatic embryos 3.4. Germination of somatic embryos 3.4.1. Purine metabolism during germination of somatic embryos 3.4.2. Pyrimidine metabolism during germination of somatic embryos 4. Purine and pyrimidine metabolism during organogenesis 5. Conclusions 6. Acknowledgement 7. References