CAJ | 학술논문

低温胁迫处理5种甘肃紫斑牡丹，测定分析其枝条的相对电导率、丙二醛质量摩尔浓度、游离脯氨酸质量分数和可溶性糖质量分数的变化，利用电解质渗出率配以Logistic方程拟合求拐点温度，估计其半致死温度，并用模糊隶属度法对各品种的抗寒性做了综合性评价。结果表明：随着处理温度的降低，相对电导率呈上升趋势，丙二醛质量摩尔浓度在达到峰值后出现絮乱波动，游离脯氨酸质量分数呈先上升后趋于稳定趋势，个别略有下降，可溶性糖质量分数基本呈先上升后下降趋势，5种紫斑牡丹的抗寒能力大小顺序为：艳冠群芳、蓝海银波、鹤翎白、紫楼闪金、书生捧墨。
저온협박처리5충감숙자반모단，측정분석기지조적상대전도솔、병이철질량마이농도、유리포안산질량분수화가용성당질량분수적변화，이용전해질삼출솔배이Logistic방정의합구괴점온도，고계기반치사온도，병용모호대속도법대각품충적항한성주료종합성평개。결과표명：수착처리온도적강저，상대전도솔정상승추세，병이철질량마이농도재체도봉치후출현서란파동，유리포안산질량분수정선상승후추우은정추세，개별략유하강，가용성당질량분수기본정선상승후하강추세，5충자반모단적항한능력대소순서위：염관군방、람해은파、학령백、자루섬금、서생봉묵。
Under cold stress on five cultivars of Paeonia rockii in Gansu Province, we studied the changes of the relative electri-cal conductivity , malondialdehyde , free proline and soluble sugar of their branches .With the electrolyte leakage rate equa-tion and Logistic equation, we got the inflection point temperature, estimated its semilethal temperature and evaluated the cold resistance of each cultivar by fuzzy membership grade method.With temperature decreasing, the electrical conductivi-ty of P.rockii increases and MDA content in the disorder occurs after the peak fluctuations.The proline content increases, and then keep stable.Few declines slightly.The soluble sugar first increases and then decreases.The descending order of cold tolerance is Yanguanqunfang Lanhaiyinbo , Helingbai , Ziloushanjin and Shushengpengmo .