Ectopic-overexpression of AmHsa32 from Ammopiptanthus mongolicus Promoted Heat Tolerance in Nicotiana benthamiana Overexpression of a Zinc-finger Protein Gene AmZFPG from Ammopiptanthus mongolicus Confers Tolerance to Cold , Drought and Salt Stress in Transgenic Tobacco Influx of Ca2+-Dependent H+ to Suspended Cells of Ammopiptanthus mongolicus Triggered by Mechanical Stimulation Overexpression of a Zinc-finger Protein Gene AmZFPG from Ammopiptanthus mongolicus Confers Tolerance to Cold , Drought and Salt Stress in Transgenic Tobacco Cloning and Expression Analysis of AmDREB2.1 in Ammopiptanthus mongolicus Primary Physiological Responses of Ammopiptanthus mongolicus Cells Induced by Methyl Jasmonate