Résumé
Differential screening of cDNA libraries of mid-maturation stage zygotic embryo 4–6 day old seedlings yielded a set of cDNAs preferentially expressed dining embryogenesis and germination, respectively. Sequence analysis of embryo cDNAs identified these clones as ena isoforms of 2S storage proteins- albumins, and an MT-like protein. The expression of these ger different stages of zygotic and somatic embryogenesis was examined by Northern blot analysis different patterns of expression were observed for various isoforms of albumins. The MT-like gene expressed in embryos and needles and its expression was regulated by ABA, osmoticum as well as i ions. Partial DNA sequence analysis and predicted amino acid sequences of germination — assa cDNAs show we have isolated clones with homology to a range of plant proteins: including a chape 60-ß, low molecular weight heat shock proteins (LMW HSPs), a luminal binding protein (BiP), a ty chlorophyll a/b binding protein (CAB), a thiol-protease precursor and a NADPH-P450 reductase. I seeds all the clones detected transcripts which increased by 2 days of germination.