SO2毒害环境下水稻叶片超氧化物歧化酶活性与

为了通过吸收光谱快速测量SO₂胁迫下水稻叶片超氧化物歧化酶活性，采用小区试验研究了SO₂毒害环境下水稻叶片超氧化物歧化酶活性与吸收光谱变量的相关性。结果表明：在整个生育期，相关曲线存在2个的波峰点，位于520~550 nm和720~750 nm 2个波段之间。计算720~ 750 nm和520~550 nm波段光谱吸收率的平均值A₁和A₂，通过A₁和A₂构建比值光谱变量(A₁/A₂)、相加光谱变量(A₁+A₂)及对数相加变量(lgA₁+lgA₂)，利用光谱变量反演水稻叶片超氧化物歧化酶活性。研究发现：在水稻整个生育期，对数相加光谱变量与超氧化物歧化酶活性的相关性显著提高。选取对数相加变量构建水稻叶片超氧化物歧化酶活性的模型。为进一步提高吸收光谱快速测量SO₂毒害环境下水稻叶片超氧化物歧化酶活性提出了探索性研究。

Correlation Analysis Between Leaf SOD Activation and Spectral Absorption for Rice Under Sulfur Dioxide Fumigation Condition

In order to measure the SOD activation of rice leaves by absorption spectra under sulfur dioxide fumigation condition, the correlation between the SOD activation and spectral absorption of rice leaf was studied in an area experiment under sulfur dioxide fumigation condition. Results showed that the correlation curve had two peak points in all the growth stages, located between 520-550 nm and 720-750 nm bands. The average A₁ and A₂ were calculated by 720-750 nm and 520-550 nm bands. The spectral variables were formed by A₁ and A₂, and the spectral variables infer SOD activation. The study found that, in the whole rice growing period, the Logarithmic sum of variable correlation spectroscopy and superoxide dismutase activity correlated significantly improved. The model of SOD activation was built by selecting logarithm adding. This article proposes some exploring research for measuring the SOD of rice under sulfur dioxide fumigation condition.