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铜、锰、锌对麦冬光合特性和矿质元素的影响
余史丹,邱佳妹,王康才,李雨晴,李柯妮,李丽
0
(南京农业大学园艺学院,南京 210095)
摘要:
研究不同浓度Cu2+、Mn2+、Zn2+处理对川麦冬光合特性的影响,以及Cu、Mn、Zn各元素在川麦冬植株体内累积分布规律,以期为麦冬营养调控提供技术依据。采用盆栽试验,在改良Hoagland基本营养液的基础上,设置不同浓度水平的Cu2+、Mn2+、Zn2+处理,测定麦冬光合生理指标,采用电感耦合等离子发射光谱法测定各元素在麦冬地上部分及地下部分的分布情况。结果显示,Cu2+、Mn2+、Zn2+对麦冬光合特性和矿质元素在麦冬植株体内的分布有一定程度的影响。其中,每盆Cu2+ 0.25 mg、Mn2+ 5 mg和Zn2+ 1 mg的处理对麦冬光合色素含量及光合速率提高最显著;Cu2+、Mn2+处理能提高麦冬植株中铜和锌累积量,而施Zn2+时,麦冬植株中锰和锌累积量大幅度增加,这可能与植物体内铜锰锌互作效应有关。不同浓度Cu2+、Mn2+和Zn2+处理对麦冬叶片及地下根系的锌铜比有提高作用,以每盆1 mg Cu2+、10 mg Mn2+和1 mg Zn2+处理为最好。
关键词:  麦冬  微量元素  光合特性  矿质元素
DOI:10.13610/j.cnki.1672-352x.20141225.030
投稿时间:2014-06-23
基金项目:江苏省镇江市农业项目(R0201100292)资助。
Effects of Cu2+, Mn2+, and Zn2+ on photosynthetic characteristics and mineral elements of Ophiopogon japonicus
YU Shidan,QIU Jiamei,WANG Kangcai,LI Yuqing,LI Keni,LI Li
(College of Horticulture, Nanjing Agricultural University, Nanjing 210095)
Abstract:
In order to provide a theoretical basis for nutritional regulation, effects of copper (Cu2+), manganese (Mn2+), and zinc (Zn2+) on photosynthetic physiology and their distribution in Ophiopogon japonicus were investigated in this study. A pot culture experiment was set up in which different concentrations of Cu2+, Mn2+ and Zn2+ in the improved Hoagland nutrient solution were applied. The photosynthetic indexes and the distribution of Cu, Mn and Zn in both aboveground and underground parts of Ophiopogon japonicus were determined using ICP-AES. The results showed that all treatments affected the photosynthetic characteristics and element distribution in Ophiopogon japonicas. The chlorophyll content and photosynthetic rate significantly increased in the treatment of 0.25 mg Cu2+, 5 mg Mn2+ and 1 mg Zn2+. The Cu2+ and Mn2+ treatments improved the accumulation of Cu and Zn in the plant, while Zn2+ treatment significantly increased the accumulation of Mn and Zn. This phenomenon may be caused by the interactive effect of Cu, Mn, and Zn in the plant. Treatments with different levels of Cu2+, Mn2+, and Zn2+ enhanced the ratio of Zn to Cu in both aboveground and underground parts of Ophiopogon japonicus and the treatment with 1 mg Cu2+, 10 mg Mn2+, and 1mg Zn2+ were the best.
Key words:  Ophiopogon japonicus  trace elements  photosynthetic characteristics  mineral element

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