<br>铅污染土壤中混作对大豆生长及胁迫响应的影响,Chemosphere

当前位置： X-MOL 学术 › Chemosphere › 论文详情

Our official English website, www.x-mol.net, welcomes your feedback! (Note: you will need to create a separate account there.)

铅污染土壤中混作对大豆生长及胁迫响应的影响
Chemosphere ( IF 8.1 ) Pub Date : 2020-01-03 , DOI: 10.1016/j.chemosphere.2020.125833
Carolina Vergara Cid ₁ , María L Pignata ₁ , Judith H Rodriguez ₁

Affiliation

通过共作进行植物修复可能是在修复土壤的同时生产安全作物的一种有前途的方法。然而，植物相互作用的影响，特别是胁迫反应的影响仍不清楚。本研究的目的是调查混作对大豆和万寿菊植物生长、胁迫反应和铅吸收的影响，并评估铅污染土壤中农业生产的可行性。进行盆栽试验来研究三种土壤 Pb 浓度下混作与单作的效果。分析了以下参数：生物量、植物中的铅含量和胁迫反应指标（叶绿素、蛋白质、糖、丙二醛、谷胱甘肽S-转移酶活性、胡萝卜素和抗氧化能力）。结果表明，在混作中，这两个物种都在污染土壤中受益，因为生物量和胁迫反应得到了改善。 T. minuta 通过改善谷物质量，甚至提高在污染土壤中的存活率，减少了铅对大豆的不利影响，在污染土壤中，单一作物的大豆只能生长到早期营养阶段。这种效果与共作大豆的脂质过氧化减少 50% 以及抗氧化反应急剧增加有关。此外，混作还提高了 T. minuta 的 Pb 积累（高出 45%），以及叶绿素和胡萝卜素含量（分别增加了 66% 和 42%）以及谷胱甘肽 S-转移酶活性（高出两倍）。高度污染的土壤。我们的结果表明，根际相互作用有助于增强这两个物种对铅毒性的耐受性，从而允许在高度污染的土壤中生产大豆，而不会因食用谷物而造成健康风险。

"点击查看英文标题和摘要"

Effects of co-cropping on soybean growth and stress response in lead-polluted soils.

Phytoremediation by co-cropping may be a promising approach to produce safe crops while remediating the soil. However, the effects of plant interaction, especially stress response, remain unclear. The aims of this study were to investigate the effect of co-cropping on plant growth, stress response and lead (Pb) uptake in soybean and Tagetes minuta, and to assess the feasibility of agricultural production in Pb-polluted soils. A pot experiment was conducted to study the effect of co-cropping vs monocrop at three soil Pb concentrations. The following parameters were analyzed: biomass, Pb content in plants, and stress response indicators (chlorophylls, proteins, sugars, malondialdehyde, glutathione S-transferase activity, carotenes and antioxidant power). Results showed that in co-cropping, both species were benefited in polluted soils, since biomass and stress response were improved. T. minuta reduced adverse effects of Pb on soybean by improving grain quality and even survival in polluted soils, where soybean in monocrop grew only up to early vegetative stages. This effect was related to a 50% reduction in lipid peroxidation for soybean in co-cropping along with a sharp increase in the antioxidant response. In addition, co-cropping enhanced Pb accumulation in T. minuta (45% higher), as well as content of chlorophylls and carotenes (66% and 42% of increment, respectively) and glutathione S-transferase activity (two times higher) in the highly polluted soil. Our results showed that rhizosphere interactions can help enhance tolerance to Pb toxicity in both species, allowing soybean production in highly polluted soils without posing health risk from grain consumption.

更新日期：2020-01-04

点击分享查看原文

点击收藏

阅读更多本刊新发论文本刊介绍/投稿指南