水稻根系除具有吸收水分和养分、合成氨基酸和植物激素等功能外,还具有氧化力,可以氧化土壤中的有毒物质如硫化氢、硫化亚铁等,保证了根的正常代谢,为地上部根、茎、叶、穗的生长提供水分和养料。日本学者松尾孝岭等研究指出,硫化氢直接附于根表引起根腐病。但是,不同品种对硫化氢反应不同,品种间的抗根腐性存在差异。我省水稻低产田面积1000多万亩,其中因土壤渍害造成低产的占1/3,而珠江及韩江三角洲的近300万亩低、中围田区,由于地下水位高,土壤通透性不良,因而水稻根系生长受阻,常有前期慢发后期早衰现象,是夺取稳产高产的一大障碍。培育根系泌氧力强的品种,对提高上述地区的产量具有重要意义。关于稻根氧化力的研究,多是以栽培稻为材料,而对于野生稻在这方面的研究未见报道。我省野生稻资源丰富,且多分布在终年积水的沼泽地,对不良的 In addition to its functions of absorbing moisture and nutrients, synthesizing amino acids and plant hormones, rice roots also have oxidizing power and can oxidize toxic substances in the soil such as hydrogen sulfide and ferrous sulfide to ensure the normal metabolism of the roots. , Stems, leaves, spike growth to provide moisture and nourishment. Japanese scholar Komatsu Komatsu studies have pointed out that hydrogen sulfide directly attached to the root cause root rot. However, different varieties reacted differently to hydrogen sulfide, and there was a difference in resistance to root rot among the varieties. The area of ​​paddy low-yield rice in our province is more than 10 million mu, of which, 1/3 is caused by low soil yield, while nearly 3 million mu in low and middle area of ​​Pearl River and Hanjiang Delta are permeable due to high groundwater level Poor sexual, and thus blocked the growth of rice roots, often early premature aging slow phenomenon, is to seize a major obstacle to stable and high yield. Breeding of strong root oxygen secretion varieties, to improve the yield in these areas is of great significance. The research on the oxidative stress of rice roots mostly uses cultivated rice as material, and no research on wild rice has been reported in this aspect. Wild rice in our province is rich in resources, and more distributed in the wetlands all year round wetlands, on the poor