The ultrastruetural alteration of maize plants infected with the maize rough dwarf virus (MRDV) was studied with transmission electron microscopy. The results r
The effects to elicit resistance reaction on oilseed rape (Brassica napus L. cv Xinongchangjiao )by four partially N-acetylated chitosan 7B, 8B, 9B and 10B (Deg
Effects of several pesticides on superoxide dismutase (SOD) activities of different rice varieties were studied. The results showed that SOD activities of almos