Change of Proteins at Different Mitotic Phases in Allium sativum SILVER STAINING OF PLANT CHROMOSOMES——TECHNIQUES, PRINCIPLE AND APPLICATION Detection of 45S rDNA and Telomere Sequences and Karyotype Analysis of Sagittaria trifolia L. Construction of AFLP Fingerprint of 36 Poncirus accessiom Construction of AFLP Fingerprint of 36 Poncirus accessiom Comparison and Improvement of Polymorphism Amplification Methods Used for Detecting DNA Diversity of Plants Ni^2+和Cu^2+离子对蚕豆根生长和根尖核仁的影响