| 吕波,王宇函,姜存仓.脯氨酸缓解酸性土壤上小白菜铝毒胁迫的效应及其潜在机制[J].农业环境科学学报,2018,37(5):868-874. |
| 脯氨酸缓解酸性土壤上小白菜铝毒胁迫的效应及其潜在机制 |
| Effects of proline application and their potential mechanisms on pakchoi under aluminum stress in acidic soil |
| 投稿时间：2017-08-14 |
| DOI：10.11654/jaes.2017-1103 |
| 中文关键词: 外源脯氨酸 小白菜 产量 生理特性 |
| 英文关键词: exogenous Pro pakchoi yield physiological characteristics |
| 基金项目:国家重点研发计划（2017YFD0200803）；中央高校基本科研业务费专项资金（2017PY055）；大学生科技创新基金项目（SRF2017075） |
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| 中文摘要: |
| 为了研究不同浓度外源脯氨酸（Pro）对酸性土壤上小白菜铝（Al）毒胁迫的效应及其潜在机制，以小白菜为试验材料，通过酸性土壤盆栽试验，利用不同浓度外源Pro，设置T1（0 mmol·L-1Al+0 mmol·L-1外源Pro）、T2（27 mg·kg-1 Al+0 mmol·L-1外源Pro）、T3（27 mg·kg-1 Al+10 mmol·L-1外源Pro）、T4（27 mg·kg-1 Al+20 mmol·L-1外源Pro）、T5（27 mg·kg-1 Al+50 mmol·L-1外源Pro）共5个处理，对小白菜生理特性和土壤性质进行研究。结果表明：与T1相比，Al胁迫下小白菜的产量、抗氧化酶活性以及土壤pH值明显降低，其中，产量降低了约10.6%，土壤pH值降低了0.75个单位；此外，叶片丙二醛和Al含量以及土壤活性Al总量明显升高，其中，小白菜叶片Al含量和土壤活性Al含量分别增加了24.3%和15.3%，对小白菜产生明显胁迫作用，抑制其生长；相对于Al处理，施用不同浓度外源Pro可以明显增加小白菜产量，T3、T4和T5分别增加了29.3%、38.4%和65.2%，抗氧化酶活性也显著提高，而叶片丙二醛和Al含量以及土壤活性Al含量显著降低，T3、T4和T5叶片Al含量分别降低了20.4%、45.6%和49.8%，说明不同浓度外源Pro均能缓解Al对小白菜的胁迫作用。研究表明，外源Pro可缓解Al对小白菜胁迫作用，且缓解效果为T5 > T4 > T3，50 mmol·L-1外源Pro缓解效果较好。 |
| 英文摘要: |
| The aim of this study was to investigate the effects of proline(Pro) application and their potential mechanisms on pakchoi under aluminum(Al) stress in acidic soil. A pot experiment was carried out in acidic soil, with pakchoi as the test material. The experiment consisted of different concentrations of exogenous Pro with Al:T1(0 mg·kg-1 Al + 0 mmol·L-1 Pro), T2(27 mg·kg-1 Al + 0 mmol·L-1 Pro), T3(27 mg·kg-1 Al + 10 mmol·L-1 Pro), T4(27 mg·kg-1 Al + 20 mmol·L-1 Pro), and T5(27 mg·kg-1 Al + 50 mmol·L-1 Pro), to study the physiological characteristics of the pakchoi and the soil properties. The results showed that compared to T1 treatment, T2 treatment resulted in a significant decrease in the antioxidant enzyme activities, the yield of pakchoi, and soil pH. The yield of pakchoi and soil pH were remarkably reduced by 10.6% and 0.75, respectively. On the other hand, the malondialdehyde(MDA) content and aluminum concentration of the leaves and active Al content of the soil increased considerably. Aluminum in the leaves of the pakchoi and the active Al content of the soil increased by 24.3% and 15.3%, respectively. Apparently, aluminum stress inhibited the growth of the pakchoi. Compared to Al treatment alone(T2), different concentrations of exogenous Pro with the T3, T4, and T5 treatments significantly increased the yield of the pakchoi by 29.3%, 38.4%, and 65.2%, respectively. Moreover, exogenous Pro also improved the activities of antioxidant enzymes, whereas the MDA and Al contents of the leaves and the active Al content of the soil obviously decreased. Additionally, aluminum contents in the leaves of the T3, T4, and T5 treatments declined by 20.4%, 45.6%, and 49.8%, respectively. It could be suggested that exogenous Pro may provide relief to pakchoi under Al stress, with the remission effect in the order of T5 > T4 > T3, i.e., the effect of 50 mmol·L-1 Pro was the best. |
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