分析了中国江西省龙南县足洞乡重稀土矿区及非矿区稀土元素富集植物芒萁体内稀土元素的精细定位及光抑制对芒萁光合特性影响.结果表明,稀土元素主要分布在芒萁的根部和叶片中,矿区芒萁叶片中的重稀土含量显著高于非矿区芒萁叶片.电镜观察表明,稀土元素主要分布在细胞壁外,细胞质中只含有微量稀土元素.与非矿区芒萁叶片相比,重稀土矿区芒萁叶片中的色素含量显著降低,但β-胡萝卜素含量显著增高.正常光照条件下,矿区芒萁光系统Ⅱ(PS Ⅱ)的光化学特性比非矿区芒萁略有提高.光抑制实验表明,400μmol photons·-2·s-2的光照强度对矿区芒萁光化学活性影响很小而非矿区芒萁光化学活性显著下降.综上所述,矿区芒萁富集重稀土元素的机制是:(1)通过产生的稀土结合多糖、蛋白等物质将稀土元素固定在细胞壁外;(2)通过改变叶片内部的叶黄素循环色素含量避免高光强对光系统的伤害作用.
参考文献
| [1] | Ichihashi H;Hand M;Tatsukawa R .Rare earth elements(BEEs)in naturally grown plants in relation to their variation in soils[J].Environmental Pollution,1992,76(02):157. |
| [2] | 储钟稀;牟梦华;张和民;王凤珍 .氯化铈对螺旋藻光合放氧、色素和蛋白质形成的影响[J].中国稀土学报,1994,12(04):344. |
| [3] | 洪法水,刘超,郑蕾,王雪峰,吴康,宋卫平,吕世鹏,陶冶,赵贵文.La3+,Ce3+处理诱导菠菜Rubisco与Rubisco 活化酶复合体的形成[J].中国科学B辑,2004(04):346-352. |
| [4] | 褚海燕,李振高,谢祖彬,朱建国,曹志洪.稀土元素镧对红壤微生物区系的影响[J].环境科学,2000(06):28-31. |
| [5] | 褚海燕,朱建国,谢祖彬,李振高,曹志洪.镧对红壤转化酶、过氧化氢酶和脱氢酶活性的影响[J].中国环境科学,2001(01):77-80. |
| [6] | Clijsters H;Assche F V .Inhibition of photosynthesis by heavy metals[J].Photosynthesis Research,1985,7:31. |
| [7] | 李凡庆;朱育新;毛振伟;霍登伟.赵化章,尹香莲,赵贵文 .电感耦合等离子体原子发射光谱法测定植物体铁芒萁中的稀土元素[J].分析化学,1992,20(08):981. |
| [8] | Chao-Yang Wei;Cheng Wang;Xin Sun;Wu-Yi Wang .Arsenic accumulation by ferns: a field survey in southern China[J].Environmental geochemistry and health,2007(3):169-177. |
| [9] | 洪法水,魏正贵,陶冶,宛寿康,杨跃涛,曹心德,赵贵文.天然植物铁芒萁体内稀土元素的分布及其叶绿素镧的结构表征[J].植物学报,1999(08):851. |
| [10] | 季宏兵 .江西南部（赣南）富稀土景观中稀土元素的分布、分异机制及生态效应[D].中国科学院地理科学与资源研究所,2003. |
| [11] | 魏正贵,宛寿康,张巽,洪法水,赵贵文,陶冶,汪振立,谢先求.感耦等离子体发射光谱法研究土壤-铁芒萁系统中稀土元素的分布、累积和迁移特征[J].应用生态学报,2001(06):863-866. |
| [12] | 魏正贵,尹明,张巽,洪法水,李冰,陶冶,赵贵文,汪振立,谢先求.稀土元素在赣南非稀土矿区和不同稀土矿区土壤-铁芒萁（ Dicranopteris linearis ）系统中的分布、累积和迁移[J].生态学报,2001(06):900-906. |
| [13] | Wei Zhenggui;Yin Ming;Zhang Xun .Rare earth elements in naturally grown fern Dicranopteris linearis in relation to their variation in soils in South-Jiangxi region (southern china)[J].Environmental Pollution,2001(3):345-355. |
| [14] | 郭繁清,王玉琦,孙景信,陈红民,许雷,曹国印.天然植物铁芒萁叶中稀土结合蛋白的初步研究[J].核化学与放射化学,1996(03):133. |
| [15] | 王玉琦;许雷;孙景信;郭繁清,陈红民,曹国印 .分子活化分析研究铁芒萁叶中稀土结合多糖[J].中国科学B辑,1997,27(06):517. |
| [16] | 王玉琦,江平,郭繁清,张智勇,孙景信,许雷,曹国印.天然植物体中与稀土元素结合的DNA[J].中国科学B辑,1999(04):373-378. |
| [17] | 张智勇,王玉琦,孙景信,李福亮.稀土超量积累植物铁芒萁中稀土元素的赋存状态[J].稀土,2000(03):42-45,58. |
| [18] | 洪法水,魏正贵,陶冶,宛寿康,杨跃涛,曹心德,赵贵文.天然植物铁芒萁体内稀土元素的分布及其叶绿素镧的结构表征[J].植物学报,1999(08):851. |
| [19] | 洪法水,魏正贵,赵贵文.稀土在天然植物铁芒萁体内结合形式的光谱学研究[J].高等学校化学学报,2001(11):1790-1794. |
| [20] | Li XL;Cheng X;Yang LM;Wang RR;Zheng YT;Xiao WL;Zhao Y;Xu G;Lu Y;Chang Y .Dichotomains A and B: Two new highly oxygenated phenolic derivatives from Dicranopteris dichotoma[J].Organic letters,2006(9):1937-1940. |
| [21] | Li XL;Yang LM;Zhao Y;Wang RR;Xu G;Zheng YT;Tu L;Peng LY;Cheng X;Zhao QS .Tetranorclerodanes and clerodane-type diterpene glycosides from Dicranopteris dichotoma.[J].Journal of natural products,2007(2):265-268. |
| [22] | Wang L F;Ji H B;Bai K Z;Li L B;Kuang T Y .Photosystem 2 activities of hyper-accumulator Dicranopteris dichotoma Bernh from a light rare earth elements mine.[J].Photosynthetica: International Journal for Photosynthesis Research,2006(2):202-207. |
| [23] | Photosynthetic Characterization of the Plant Dicranopteris dichotoma Bernh. in a Rare Earth Elements Mine[J].植物学报,2005(09):1092-1100. |
| [24] | Jarvis K E.Inductively Coupled Plasma-mass Spectrometry(ICP-MS)[A].Singapore:Longman Singapore Publishers Ltd,1997:171. |
| [25] | Thayer S S;Bj(o)rkman O .Leaf xanthophyll content and composition in sun and shade determined by HPLC[J].Photosynthesis Research,1990,23:331. |
| [26] | Xiao-ping Wang;Xiao-quan Shan;Shu-zhen Zhang;Bei Wen .Distribution of rare earth elements among chloroplast components of hyperaccumulator Dicranopteris dichotoma[J].Analytical and bioanalytical chemistry,2003(6):913-917. |
| [27] | Wei ZG;Hong FH;Yin M;Li HX;Hu F;Zhao GW;WoonchungWong J .Subcellular and molecular localization of rare earth elements and structural characterization of yttrium bound chlorophyll a in naturally grown fern Dicranopteris dichotoma[J].Microchemical Journal: Devoted to the Application of Microtechniques in all Branches of Science,2005(1):1-8. |
| [28] | 程时;彭学敏.生物医学电子显微镜技术[M].北京:北京医科大学中国协和医科大学联合出版社,1997:176. |
| [29] | Hall A E;William W T;Charles W A;Platt-Aloia K,Leonard RT .Stomatal response to humidity and lanthanum[J].Physiologia Plantarum,1977,41:89. |
| [30] | 周世恭,刘敏.镧在小麦不同部位组织细胞中X射线能谱分析[J].植物学报,1998(02):180. |
| [31] | 周世恭 .小麦不同部位组织中镧和其他元素分布的X射线能谱分析[J].植物学报,1995,37(11):889. |
| [32] | Peterson T A;Swanson E S;Hull R J .Use of lanthanum to trsce apoplastic solute transport in intact plants[J].Journal of Experimental Botany,1986,37(179):807. |
| [33] | 高小彦;郭一松;吴敦肃 .研究镧在水稻幼苗组织分布中的冰冻转换法[J].植物生理学通讯,1998,34(04):270. |
| [34] | Bayer M E;Bayer M H .Lanthanide accumulation in the periplasmic space of Escherichia coli[J].B J Bacteriol,1991,173:141. |
| [35] | 胡勤海.新月藻对稀土元素镧（La）的吸收富集[J].浙江农业大学学报,1996(03):241. |
| [36] | 沈志强,康琳,金承志.轻稀土钕离子Nd3+可以被纤细裸藻（Euglena gracilis） 277摄入细胞内部[J].科学通报,1999(15):1590-1598. |
| [37] | Merroun M L;Chekroun K B;Arias J M;Munoz M T G .Lanthanum fixation by Myxococcus xanthus:cellular location and extracellular polysaccharide observation[J].CHEMOSPHERE,2003,52:113. |
| [38] | Baker A J M .Accumulators and excluders strategies in the response of plants to heavy metals[J].Journal of Plant Nutrition and Soil Science,1981,3:643. |
| [39] | Bilger W.;Brummet W.;Kossmann J.;Willmitzer L.;Fisahn J. .VIOLAXANTHIN CYCLE PIGMENT CONTENTS IN POTATO AND TOBACCO PLANTS WITH GENETICALLY REDUCED PHOTOSYNTHETIC CAPACITY[J].Plant physiology,1995(4):1479-1486. |
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