Advances on effects of nitric oxide on resistances of plants to heavy metal stress Identification and Molecular Mapping of Xa32(t),a Novel Resistance Gene for Bacterial Blight(Xanthomonas oryzae pv.oryzae)in Rice Drought and Heat Resistance of Wild-type Agrostis stolonifera L. Collected in Guizhou Responses of Three Native Shrubs to Drought Stress in Urumqi A RESEARCH ON THE RESISTANCES OF XANTHOMONAS ORYZAE PV.ORYZAE TO BACTERICIDES UNDER LABORATORY CONDITIONS