高温逆境下嫁接番茄耐热特性研究

Endurance to high temperature stress of grafted tomato

以赤茄、粘毛茄、北农茄砧和托鲁巴姆为砧木,研究了嫁接番茄对夏季高温的抵御能力,以及对果实品质的影响。结果表明:高温下北农茄砧嫁接番茄叶片游离脯氨酸、蛋白质的含量均较番茄自根苗多,同时POD与APX活性较高,表现出较强的抗热能力;以赤茄为砧木嫁接番茄叶片POD与APX活性较低,叶片游离脯氨酸、蛋白质的含量减少,耐热性降低。嫁接显著地提高了番茄果实有机酸含量,降低了果实蛋白质含量。嫁接对果实维生素C、还原糖含量影响较小。

Four rootstocks were used for this experiment to verify whether graft can improve the tolerance to high temperature and fruit quality of tomato growing in solar greenhouse during summer.The results were as(follows:) when use Beinongqiezhen for the rootstock,the leaf free proline and protein contents were the highest among those four treatments,and the activities of POD and APX were higher those that those of other rootstocks,which indicated the resistance to high temperature of Beinongqiezhen was the best.Whereas when used Chiqie for the rootstock,the leaf free proline and protein contents were decreased compared with those of other four treatments,and the activities of POD and APX were also lower than those of other rootstocks,which means that Chiqie is not suitable for high-temperature cultivation.When grafted,the fruit organic acid improved obviously,there was minimal effect on reduced sugar and vitamin C content in the fruit,at the same time,the fruit protein content(decreased) distinctively.