There is no doubt that rare earth elements stand an important position among the essential elements of plant growth and it is long time since they are first used as plant growth promoters. Given their effects on microstructure, most reports are focused on the toxicology rather than promotion. Using cucumis sativus L. (Jin Chun No.5) as experiment material, we try to find out the nutritional effects of low Y3+ concentrations on cucumber seedlings' leaves. The present paper suggests that the rare earth elements act as micronutrients at low concentrations while they give rise to toxicity at high concentration. Benefits defeat toxicity with concentration ranging from 5 to 25μmol·L-1. Through careful study, at the Y (N03)3 concentration of 10μmol·L1 the content of chlorophyll as well as the activities of SOD, Cu-Zn SOD and the POD are the highest. It indicates 10μmol·L-1 is the optimum concentration of yttrium for promoting the cucumber growth.
参考文献
| [1] | 慕康国,张文吉,崔建宇,张福锁,胡林.Review of Studies on Rare Earth against Plant Disease[J].稀土学报(英文版),2004(03):315-318. |
| [2] | Jia Yanxia,Gao Yongsheng,Zeng Fuli.Resistance of LaCl3 to Oxidative Stress Induced by 2, 4-Dichlorophenoxy[J].稀土学报（英文版）,2005(02):240-244. |
| [3] | Hu Q H;Ye Z J .Physiological effects of rare-earth elements on plants[J].Plant Physiology Communications,1996,32:296. |
| [4] | Fang N H;He Y Z;Zhao G W .Advance in study of physiological effects of rare earth elements on plant[J].Chinese Rare Earths,1998,19:66. |
| [5] | Gschneidner Jr K A;Eyring L.Handbook on the Physics and Chemistry of Rare Earths[M].Amsterdam:elsevier Science Publishers,1990:424. |
| [6] | Hu Z;Richter H;Sparovek G;Schnug E .Physiological and biochemical effects of rare elements on plants and their agricultural significance:a review[J].Journal of Plant Nutrition and Soil Science,2004,27:183. |
| [7] | Chen WP;Li PH .Chilling-induced Ca2+ overload enhances production of active oxygenspecies in maize (Zea mays L.) cultured cells: the effect of abscisic acidtreatment[J].Plant, Cell and Environment,2001(8):791-800. |
| [8] | Hu Q H;Zheng S P;Tang S M;Guan L L .Effects of Sm and Y on growth of Chlorella Ellipsoidea,Agra-eviron[J].Prote,2001,20:398. |
| [9] | Shen W Q .The method to the measurement of chlorophyll of wheat[J].Journal of Plant Physiology,1988,14:62. |
| [10] | Saric M .Practikum is fiziologije[J].Naucna Rnjiga,1985,53 |
| [11] | Bradford M M .A rapidand sensitivemethodforthe quantitation of microgram quantities of protein utilizing the principle of proteindye binding[J].Annual Review of Biochemistry,1976,72:248. |
| [12] | Heath R L;Pareker L .Photoperoxidation in isolated chloroplasts kinetics and stoichiometry of fatty acid peroxidation[J].Archives of Biochemistry and Biophysics,1968,25:189. |
| [13] | Zhang Z L;Qu W Q.Laboratory Manual of Plant Physiology[M].北京:高等教育出版社,2003:1. |
| [14] | Mu Kangguo,Zhang Fusuo,Cui Jianyu,Zhang Wenji,Hu Lin.Toxicity of Lanthanum Against Rhizoctonia solani and Its Effect on Disease-Related Enzymes[J].稀土学报（英文版）,2005(02):235-239. |
| [15] | 杜红星,谢孟峡,刘媛.稀土多元植物营养液的研制[J].稀土,2005(06):61-64. |
| [16] | 魏幼璋.植物培养液中稀土元素与磷关系的研究[J].中国稀土学报,2002(01):91-93. |
| [17] | Liang T;Ding S M;Zhang Z L;Yan J C Sun Q Wang L J .Mechanisms of fractionations of rare earth elements in plant[J].Journal of the Chinese Rare Earth Society,2005,23:239. |
| [18] | Velasco J R;Domingo L E;Lansangan A S;Siera Z N .Cultural studies on coconut cadang:reaction of plants to the rare earths,thalium and certain soil samples[J].The Philippine J Coconut Stud,1979,4:1. |
| [19] | Ni J Z.Bioinorganic Chemistry of Rare Earth Elements[M].北京:科学出版社,1995:19. |
| [20] | Wei Y Z .The physiological base on the rare earth applying to the agriculture[J].Journal of Plant Nutrition and Fertilization,2000,6:646. |
| [21] | Wang Y Q;Sun J X;Chen H M .Neutron activation analysis applying to the distribution of rare earth in the plant body[J].Journal of the Chinese Rare Earth Society,1997,15:160. |
| [22] | Wang X R;Gu Z M;Gu X Y.Effect of humic substances on the species and bioavailabilities of extrinsic rare earth element in stimulated soil-plant ecosystem[A].Canada,University of Guelph,Ontario,Canada,2001 |
| [23] | Zhang Z Y;Li F L;Wang Y Q;Xiao H Q Chai Z F .The segregation of rare earth in the soil-plant[J].Journal of the Chinese Rare Earth Society,2002,20:94. |
| [24] | 周正朝,张希彪,上官周平.植物对稀土元素的生理生态响应[J].西北农业学报,2004(02):119-123. |
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