| 不同铝水平胁迫对橡胶树幼苗若干生理指标的影响 |
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| 引用本文： | 张晗,安锋,袁坤,陈秋波,王真辉.不同铝水平胁迫对橡胶树幼苗若干生理指标的影响[J].热带作物学报,2014,35(10):1992-1996. |
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| 作者姓名： | 张晗 安锋 袁坤 陈秋波 王真辉 |
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| 作者单位： | 1. 海南大学环境与植物保护学院,海南海口 570228;中国热带农业科学院橡胶研究所 农业部儋州热带作物野外观测实验站 海南儋州 571737
2. 中国热带农业科学院橡胶研究所 农业部儋州热带作物野外观测实验站 海南儋州 571737 |
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| 基金项目： | 中央级公益性科研院所基本科研业务费专项资金项目(No. 1630022013003、No. 1630022014018)。 |
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| 摘 要： | 研究不同铝水平胁迫(0、50、100、200、400 mmol/L)对橡胶树幼苗过氧化物酶(POD)、超氧化物歧化酶(SOD)、丙二醛(MDA)、叶绿素含量、叶片相对电导率及幼苗地上部与地下部铝含量变化的影响。结果表明,铝胁迫均使橡胶树幼苗生理指标产生一定的变化。在200 mmol/L和400 mmol/L铝水平下橡胶苗叶片POD活性和SOD活性先上升后下降至胁迫前甚至为0;MDA含量则大量增加,而且越来越高;叶绿素总量、叶绿素a和叶绿素b随胁迫时间的推移呈下降趋势,且铝浓度越大下降趋势越明显;相对电导率随胁迫时间的推移均呈现上升趋势,介于60%~100%之间,超过细胞质膜死亡的阈值;橡胶苗地下部铝含量分别约为地上部铝含量的3倍、2倍、1.3倍。不同铝水平胁迫处理中,随着铝浓度越高、胁迫时间越长对橡胶树幼苗生理指标的影响越大。其中在200 mmol/L铝水平下叶片相对电导率大于50%,达到叶片细胞膜透性阈值,MDA则大量增加,SOD和POD急速上升后下降,叶绿素含量极少。因而认为橡胶树幼苗的最高铝耐受浓度为200 mmol/L,地下部铝含量的耐受量为6.2 mg/g,地上部的耐受量为2.9 mg/g。
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| 关 键 词： | 铝水平 橡胶树幼苗 叶绿素含量 抗氧化系统 |
Effects of Aluminum Concentrations on Several Physiological Parameters of Rubber Tree Saplings |
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| ZHANG Han,AN Feng,YUAN Kun,CHEN Qiubo and WANG Zhenhui.Effects of Aluminum Concentrations on Several Physiological Parameters of Rubber Tree Saplings[J].Chinese Journal of Tropical Crops,2014,35(10):1992-1996. |
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| Authors: | ZHANG Han AN Feng YUAN Kun CHEN Qiubo and WANG Zhenhui |
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| Institution: | 1 College of Environment and Plant Protection, Hainan University 2 Rubber Research Institute, Chinese Academy of Tropical Agricultural Sciences / Danzhou Field ObservationStation, of Tropical Crops, Ministry of Agricultur;Rubber Research Institute, Chinese Academy of Tropical Agricultural Sciences / Danzhou Field ObservationStation, of Tropical Crops, Ministry of Agricultur;Rubber Research Institute, Chinese Academy of Tropical Agricultural Sciences / Danzhou Field ObservationStation, of Tropical Crops, Ministry of Agricultur;Rubber Research Institute, Chinese Academy of Tropical Agricultural Sciences / Danzhou Field ObservationStation, of Tropical Crops, Ministry of Agricultur;Rubber Research Institute, Chinese Academy of Tropical Agricultural Sciences / Danzhou Field ObservationStation, of Tropical Crops, Ministry of Agricultur |
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| Abstract: | The aim of the present study was to examine the impacts of aluminum concentrations on some physiological parameters of rubber tree saplings. The plant materials used were young plants from tissue culture of somatic embryos of clone CATAS 7-33-97, which were cultivated in pots filled with river sand added with different aluminum concentrations at 0, 50, 100, 200 and 400 mmol/L. The leaf peroxidase(POD)content, superoxide dismutase(SOD)content, malondialdehyde(MDA)content, chlorophylls contents, cell plasma membrane permeability, and aboveground part and belowground part aluminum contents were measured. It was found that all physiological parameters in question were caused to change by adding aluminum at various concentrations with stress time. At the concentration of 200 mmol/L, the relative electric conductivity reached 50%, a threshold of cell plasma membrane permeability, MDA content increased tremendously, SOP and POD contents went up shortly before a rapid drop, while little chlorophylls were detected. More aluminum was accumulated in belowground part than the aboveground part by 3-fold, 2-fold and 1.3-fold respectively in response to 100 mmol/L, 200 mmol/L and 400 mmol/L concentrations. It is therefore concluded that the adding aluminum disrupted the regular function of rubber tree sapling at all concentrations with larger impacts from higher concentrations and longer expose time. It is suggested that the 200 mmol/L concentration could be the maximum tolerance of rubber tree saplings to aluminum, and correspondingly the maximum aluminum concentration in aboveground part and belowground part should be 2.9 mg/g and 6.2 mg/g respectively. |
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| Keywords: | Aluminium concentration Rubber tree saplings Chlorophyll content Antioxidant enzyme system |
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