EFFECT OF priA like GENE MUTATION ON DNA REPAIR AND DNA TRANSFORMATION OF Deinococcus radiodurans Probing into Cytological Embryology Mechanism of Pollen-tube Pathway Transgenic Technology SSR Detection of Rice Progenies with Transformed Oryza rufipogon DNA Preparation of Protoplast for Efficient DNA Transformation of Citric Acid Hyper-producing Aspergillus niger Industrial Strain