The bacteria multiply rapidly within the tetraploid cells and become surrounded by a membrane synthesized by the host plant.
细菌在四倍体细胞中快速繁殖，并逐渐被宿主植物合成的膜所包围。
2
By observing plant stomata, it shows us the stomas are larger than diploid, but the tetraploid density is smaller.
对杜仲二倍体和多倍体的气孔进行了观察比较发现二倍体杜仲的气孔长度小于多倍体的，气孔密度则相反。
3
To gain tetraploid watermelon resource some diploid was treated with colchicine by means of soaking seeds before germination, dropping and daubing the terminal but of young plant.