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光照强度对紫茉莉生长和镉积累的影响
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. DOI: 10.3969/j.issn.1008-9632.2009.05.027
作者姓名:周合合  柯世省  钟永军  马必利  陈金定  陈红辉
作者单位:台州学院生命科学学院,浙江临海,317000
基金项目:浙江省自然科学基金,浙江省新苗人才计划 
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。

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
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. DOI: 10.3969/j.issn.1008-9632.2009.05.027
Authors:ZHOU He-he  KE Shi-sheng  ZHONG Yong-jun  MA Bi-li  CHEN Hong-hui
Affiliation:(School of Life Science, Taizhou University, Zhejiang Linhai 317000, China)
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.
Keywords:Mirabilis jalapa  light intensity  growth  photosynthesis  Cd-accumulation
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