Effects of exogenous calcium on Bermuda grass under simultaneous stress of cadmium and acid rain

IF 2.4 4区生物学 Q2 PLANT SCIENCES Acta Physiologiae Plantarum Pub Date : 2024-10-04 DOI:10.1007/s11738-024-03715-y

Shuduan Tan, Tongtong Hua, Hongbing Yu, Xiaomei Zhou

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Abstract

Acid rain and heavy metal cadmium (Cd) pollution are global environmental problems affecting plants. Plant priming with calcium (Ca) alleviates various environmental stresses. However, the mitigation effect of exogenous Ca on Bermuda grass has not been evaluated under the dual stress of Cd and acid rain. This research was designed to explore the effect of 5 mmol/L Ca on the growth of Bermuda grass seedlings under the combined stress. The results showed that exogenous Ca improved the growth indicators including root length, plant height, stem length, leaf length, root dry weight, stem dry weight, leaf dry weight and total dry weight, reduced the MDA content, and increased the relative chlorophyll content, SOD, POD and CAT activity, and N, P, K contents in different organs. The alleviating effect of exogenous Ca was be limited by acid rain intensity. Exogenous Ca had a significant alleviating effect on plants under combined stress of Cd and pH4.5 acid rain, and promoted the Cd uptake in plants. This research provided a scientific basis for further understanding the positive effects of exogenous Ca on plant growth under the combined stress of Cd and acid rain, and phytoremediation of soil Cd pollution in acid rain areas.

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外源钙对同时受到镉和酸雨胁迫的百慕大草的影响

酸雨和重金属镉（Cd）污染是影响植物的全球性环境问题。用钙（Ca）给植物打底可以缓解各种环境压力。然而，在镉和酸雨的双重胁迫下，外源钙对百慕大草的缓解作用尚未得到评估。本研究旨在探讨 5 mmol/L Ca 在双重胁迫下对百慕大草苗生长的影响。结果表明，外源 Ca 能改善百慕大草苗的根长、株高、茎长、叶长、根干重、茎干重、叶干重和总干重等生长指标，降低 MDA 含量，提高叶绿素相对含量、SOD、POD 和 CAT 活性以及不同器官中 N、P、K 的含量。外源钙的缓解作用受到酸雨强度的限制。在镉和pH4.5酸雨的双重胁迫下，外源钙对植物有明显的缓解作用，并能促进植物对镉的吸收。该研究为进一步了解外源钙在镉和酸雨联合胁迫下对植物生长的积极作用，以及酸雨地区土壤镉污染的植物修复提供了科学依据。

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来源期刊

Acta Physiologiae Plantarum 生物-植物科学

CiteScore

5.10

自引率

3.80%

发文量

125

审稿时长

3.1 months

期刊介绍： Acta Physiologiae Plantarum is an international journal established in 1978 that publishes peer-reviewed articles on all aspects of plant physiology. The coverage ranges across this research field at various levels of biological organization, from relevant aspects in molecular and cell biology to biochemistry. The coverage is global in scope, offering articles of interest from experts around the world. The range of topics includes measuring effects of environmental pollution on crop species; analysis of genomic organization; effects of drought and climatic conditions on plants; studies of photosynthesis in ornamental plants, and more.