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磷酸缓冲液提高菜豆幼苗耐冻力机理的初探
引用本文:段建雄,王洪春,林维申. 磷酸缓冲液提高菜豆幼苗耐冻力机理的初探[J]. 北京农学院学报, 1989, 0(3)
作者姓名:段建雄  王洪春  林维申
作者单位:北京市农科院蔬菜研究中心,上海植生所,内蒙农牧学院
摘    要:磷酸缓冲液影响菜豆耐冻力的作用机理为:通过增加气孔阻力、抑制蒸腾,进而限制了根系吸水,使植株水分含量减少;促进淀粉由淀粉磷酸化的途径降解为可溶性糖;蛋白质降解为游离氨基酸,使细胞浓度增加;由于植株磷量增加,促进ATP高能健形成,最终使植株耐冻力得到增强。磷酸缓冲液的这种耐冻效应是可以传递的,H_2PO_4~-(HPO_4~=)、K~+和Na~+三种离子的单独效应低于它们的共同复合效应。

关 键 词:菜豆  耐冻性  磷酸缓冲液

PRIMARY STUDIES ON MECHANISM OF PHOSPHATIC BUFFER INCREASING COLD ENDURANCE OF KIDNFY BEAN SEEDLINGS
Duan Jianxiong,Wang Hongchung,Lin Weisheng Beijing Agricultural Sciences. PRIMARY STUDIES ON MECHANISM OF PHOSPHATIC BUFFER INCREASING COLD ENDURANCE OF KIDNFY BEAN SEEDLINGS[J]. Journal of Beijing Agricultural College, 1989, 0(3)
Authors:Duan Jianxiong  Wang Hongchung  Lin Weisheng Beijing Agricultural Sciences
Affiliation:Duan Jianxiong;Wang Hongchung;Lin Weisheng Beijing Agricultural Sciences Shanghai Institute of Plant Physiology Inner-Mongolia Agriculture-Animal Husbandry College
Abstract:The machanism of phosphatic buffer increasing cold endurance of kidneybean seedlings was sugested as follows: phosphatic buffer could increasestamata resistance, decrease transpiration and limit water absorbtion ofroot system; promote starch to dissolve into soluable sugar by starch pho-sphatic acid enzime and protein to dissolve into free animo acids, thusthe cell concentration got higher. As amount of phosphorus in plant inc-reased more ATP were formed, seedlings showed stronger cold endurance.The effectivity of phosphatic buffer could be transcended, the respectiveeffect of ion H_2PO_4-(HPO_4~-), K~+ and Na~+ was lower than thier complexeffects.
Keywords:kidney bean  cold endurance  phosphatic buffer
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