| 磷酸缓冲液提高菜豆幼苗耐冻力机理的初探 |
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| 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) |
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| 作者姓名： | 段建雄 王洪春 林维申 |
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| 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 |
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| 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。
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| 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 |
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| 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) |
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| Authors: | Duan Jianxiong Wang Hongchung Lin Weisheng Beijing Agricultural Sciences |
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| Affiliation: | Duan Jianxiong;Wang Hongchung;Lin Weisheng Beijing Agricultural Sciences Shanghai Institute of Plant Physiology Inner-Mongolia Agriculture-Animal Husbandry College |
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| 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. |
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| Keywords: | kidney bean cold endurance phosphatic buffer |
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