| 光照强度对紫茉莉生长和镉积累的影响 |
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| 引用本文： | 周合合,柯世省,钟永军,马必利,陈金定,陈红辉.光照强度对紫茉莉生长和镉积累的影响[J].生物学杂志,2009,26(5):27-29. |
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| 作者姓名： | 周合合 柯世省 钟永军 马必利 陈金定 陈红辉 |
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| 作者单位： | 台州学院生命科学学院,浙江临海,317000 |
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| 基金项目： | 浙江省自然科学基金，浙江省新苗人才计划 |
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| 摘 要： | 采用土培实验研究了25mg／kg镉处理下全光照（HL）、50％全光照（ML）和10％全光照（LL）三种生长光强对紫茉莉生长、光合作用和镉积累相关指标的影响，结果表明，紫茉莉对镉具有较高的耐性，ML对紫茉莉的生长最为有利。镉胁迫下紫茉莉净光合速率和最大光化学效率降低，暗呼吸速率增高，生物量减小。特别在高光强条件下。ML植株镉积累量最大，对镉污染土壤的植物修复效果较好。
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| 关 键 词： | 紫茉莉 光照强度 生长 光合作用 镉积累 |
Effects of light intensities on the growth and Cd-accumulation of Mirabilis jalapa plants subjected to cadmium stress |
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| ZHOU He-he,KE Shi-sheng,ZHONG Yong-jun,MA Bi-li,CHEN Hong-hui.Effects of light intensities on the growth and Cd-accumulation of Mirabilis jalapa plants subjected to cadmium stress[J].Journal of Biology,2009,26(5):27-29. |
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| Authors: | ZHOU He-he KE Shi-sheng ZHONG Yong-jun MA Bi-li CHEN Hong-hui |
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| Institution: | (School of Life Science, Taizhou University, Zhejiang Linhai 317000, China) |
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| Abstract: | Mirabilis jalapa seedlings were subjected to 25mg/kg cadmium （Cd） in soils for fifty days and synchronously cultured under full sunlight （ HL）, 50% full sunlight （ML） and 10% full sunlight （LL）, respectively. The parameters of growth, photosynthesis and Cd-accumulation were investigated. Mirabilis jalapa plants exhibited a stronger Cd-tolerance and favorable light environment of ML. The Cd-treated plants displayed a decrease in net photosynthetic rate, maximal photochemical efficiency （ Fv/Fm ） and bio- mass, and an increase in dark respiration, particularly under HL condition. Therefore, ML grown plants possessed the preferable effect of phytoremediation to Cd-contaminative soils for their higher Cd-accumulation. |
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| Keywords: | Mirabilis jalapa light intensity growth photosynthesis Cd-accumulation |
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