特效植物营养素的表观遗传效应对常规稻四代的系列影响

目的]研究特效植物营养素的表观遗传效应对常规稻4代的系列影响。方法]用常规稻一个品种采用特效植物营养素（SPNE）进行了4代的系列对比试验，比较每代都用 SPNE处理比清水对照的增产幅度；从第2代开始每代比较上代用 SPNE处理当代用清水比每代清水对照的表观遗传增产幅度；比较用 SPNE处理相同地点不同的增产效果；还比较了同代 SPNE不同喷施次数的表观遗传增产效果。根据卫生部发布的食品安全和食品污染物限量的国家标准对 SPNE处理和对照的稻米进行了对比检测，重点检测了镉的含量，还对比检测了蛋白质的含量。结果]在4代范围内随着 SPNE处理代数的增加，增产幅度逐代增加，表观遗传增产幅度逐代增加，用 SPNE处理相同地点不同的产量不同，但同田对比对应的增产幅度接近，SPNE不同喷施次数对应的表观遗传增产效果接近。 SPNE处理和对照的稻米污染物含量都远低于国家限量标准，SPNE处理后的稻米镉含量显著低于对照，蛋白质高于对照，比对照更安全更营养。结论]为提高常规稻的产量提供理论依据。

Epigenetic Effects of Special Plant Nutritional Elements (SPNE) on Four Generations of Conventional Rice

Objective] The epigenetic effects of special plant nutritional elements （SP-NE） on 4 generations of conventional rice were investigated. Method] The 4 gener-ations of a conventional rice cultivar were al treated with the SPNE. The effects of SPNE on the yield of the 4 generations were investigated. From the 1st generation to the 4th generations, some seeds were treated with the SPNE and water alterna-tively, and some seeds were treated with the SPNE persistently. Under these condi-tions, the effects of SPNE on the yield of rice were studied. In addition, the epige-netic effects of spraying times of SPNE on the yield of rice within the same gener-ation were studied. According to the national standard for pol utant content in food （GB 2762-2012）, the heavy metal content, particularly the Cd content, and the pro-tein content in rice grains were determined. Result] The increase and the epigenetic increase of yield of rice treated with SPNE were al enlarged generation by genera-tion. The yield differed among different plots even under the same SPNE treatment. But the yield increase was similar within the same plot. The epigenetic effects of spraying times of SPNE on the yield were also similar. The pol utant content in rice grains was al less than the limited content required by the national standard. The Cd content was lower and the protein content was higher in the rice treated with SPNE compared to that in the rice treated with water, indicating the rice treated with SPNE was more safe and nutritional. Conclusion] We hope to provide a theo-retical basis for the production of conventional rice.