Abstract
A subtracted cDNA library comprising of 576 clones were constructed to isolate differentially expressed sequences in the pre-embryogenic tissue (PEC) of winter oilseed repe. After differential screening, only 16 clones were identified as potential positives. Eventually, only three clones: BNPE DG3, BNPE AE4 and BNPE EG1 were confirmed by Northern analysis as upregulated in␣PEC of the oilseed rape embryogenic culture. This is the first study to report Ae4, Dg3 and Eg1 sequences as preferentially expressed in the oilseed␣rape PEC and associated with the induction of somatic embryogenesis in B.napus secondary embryogenesis. Ae4 encodes a putative proline-rich protein, Dg3 encodes a lipid transfer-like protein and Eg1 encodes a napin, member of the BNMNAP subfamily.
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