Response of ACCase, DGAT2 and PEPC genes in developing seeds of Brassica napus L. to different nitrogen levels Isolation of blt4.9 Gene Encoding LTP Protein in Hulless Barley and Its Re-sponse to Abiotic Stresses Codon Usage in the Chloroplast Genome of Rice (Oryza sativa L. ssp. japonica cv. Nipponbare ) Cloning analysis of LdDnaJ1 in gypsy moth Lymantria dispar and its response to carbaryl stress