School of Environment, Xuzhou Institute of Technology, No. 2, Lishui Road, 221018, Xuzhou, Jiangsu, China.
Jiangsu Laboratory of Pollution Control and Resource Reuse, 221018, Xuzhou, Jiangsu, China.
Bull Environ Contam Toxicol. 2020 Dec;105(6):967-971. doi: 10.1007/s00128-020-03046-x. Epub 2020 Nov 19.
The effect of silicon (Si) and different types of acid rain (AR) on rice seedling roots was elucidated. The results showed different types of AR had different effects. Nitrate AR at pH 3.0 could promote the growth of rice roots, increased the dry weight, improved root phenotype, boosted HO contents and increased peroxidase, catalase and ascorbate peroxidase activities. Sulfate AR at pH 3.0 could significantly inhibit the growth of rice roots, decreased the dry weight, root phenotype, increased HO content and autioxidant enzyme activities. Sulfate-nitrate AR at pH 3.0 spraying had no significant effect on rice roots. Under different types of AR stress, the addition of exogenous Si could significantly promote the growth of rice seedling roots. This results indicated that the effects of rice root caused by AR might be due to not only the types of AR but also the content of Si in soil.
研究了硅（Si）和不同类型酸雨（AR）对水稻幼苗根系的影响。结果表明，不同类型的 AR 具有不同的影响。在 pH 值为 3.0 时，硝酸盐 AR 可以促进水稻根系的生长，增加干重，改善根系表型，提高 HO 含量，并增加过氧化物酶、过氧化氢酶和抗坏血酸过氧化物酶的活性。在 pH 值为 3.0 时，硫酸盐 AR 可显著抑制水稻根系的生长，降低干重、根系表型、HO 含量和抗氧化酶活性。在 pH 值为 3.0 时喷洒硫酸盐-硝酸盐 AR 对水稻根系没有显著影响。在不同类型的 AR 胁迫下，添加外源 Si 可以显著促进水稻幼苗根系的生长。这一结果表明，AR 对水稻根系的影响不仅与 AR 的类型有关，还与土壤中 Si 的含量有关。
