Effects of heavy metal pollution on germination and early seedling growth in native and invasive Spartina cordgrasses

MARINE POLLUTION BULLETIN

卷:158

Article

Dolores Infante-Izquierdo, M.¹  Polo-Avila, Alejandro¹  Sanjose, Israel¹  Castillo, Jesus M.²  Nieva, F. Javier J.¹  Grewell, Brenda J.³  Munoz-Rodriguez, Adolfo F.¹ 

[1] Univ Huelva, Dept Ciencias Integradas, Fuerzas Armadas Ave,Campus El Carmen, Huelva 21071, Spain

[2] Univ Seville, Dept Biol Vegetal & Ecol, Ap 1095, Seville 41080, Spain

[3] Univ Calif Davis, Dept Plant Sci MS 4, USDA ARS Invas Species & Pollinator Hlth Res Unit, Davis, CA 95616 USA

关键词: Abiotic stress;    Metal tolerance;    Odiel estuary;    Phytoremediation;    Tinto estuary;   

DOI  :  10.1016/j.marpolbul.2020.111376

来源: Elsevier

【 摘 要 】

Seed germination and seedling establishment are the stages most sensitive to abiotic stress in the plant life cycle. We analyzed the effects of copper, zinc and nickel on seed germination and early seedling growth of native Spartina maritima and invasive S. densiflora from polluted and non-polluted estuaries. Germination percentages for either species were not affected by any metal at any tested concentration (up to 2000 mu M). However, the increase in metal concentration had negative effects on S. densiflora seedlings. The primary effect was on radicle development, representing initial seedling emergence. Spartina densiflora seedlings emerging from seeds from Tinto Estuary, characterized by high bioavailable metal loads, showed higher tolerance to metals than those from less polluted Odiel and Piedras Estuaries. Comparing our results to metal concentrations in the field, we expect S. densiflora seedling development would be negatively impacted in the most metal-polluted areas in Odiel and Tinto Estuaries.

【 授权许可】

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