不同番茄品种耐热性及耐热机理研究

Study on the Heat Resistant Character and Machanism of Different Varieties

通过对三种不同类型番茄进行越夏栽培并进行耐热机理研究,结果表明:硬果型红果番茄满田2180高温胁迫下生长势强,坐果数多,果实商品性好,产量高,适宜于越夏栽培;其耐热机理为:高温胁迫下该品种叶绿素含量显著高于对照,使其高温下保持高的光合能力;可通过提高自身SOD、POD活性减轻膜质过氧化作用,以及通过提高脯氨酸含量提高高温胁迫下自身对逆境的抗性。

Three varieties heat resistant character and machanism were studied. The result showed：under high temperature, the hard-pulp tomato cultivar （ Mantian2180） had the strong growing power, the higher frution rate, the better good character and the hihger yield, so it was suitable cultured in summer. Its thermo-resistant mechanism showed that chorophy content were higher in hard-pulp tomato cultivar after heat stress. The membrane structure damage was lighted by increasing its activities of SOD and POD. The resistance of plant was enhanced by increasing its proline cotent. All of these changes can relieve damages caused by high temperature.