| 重金属镉胁迫对黑杨派无性系光合生理及生长的影响 |
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| 引用本文： | 姚俊修,乔艳辉,杨庆山,仲伟国,李庆华,董玉峰,李善文,吴德军.重金属镉胁迫对黑杨派无性系光合生理及生长的影响[J].西北林学院学报,2020,35(2):40-46. |
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| 作者姓名： | 姚俊修 乔艳辉 杨庆山 仲伟国 李庆华 董玉峰 李善文 吴德军 |
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| 作者单位： | (山东省林业科学研究院 山东省林木遗传改良重点实验室，山东 济南 250014) |
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| 基金项目： | 山东省重点研发计划项目(2017GNC11115);山东省林业科技创新项目(LYCX02-2018-08)。 |
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| 摘 要： | 为研究重金属Cd2+胁迫对黑杨派无性系光合作用的影响，为日渐严重的土壤重金属污染治理提供依据。通过不同浓度Cd2+（5、10、15、20、25 mg/L）对黑杨派5个无性系进行胁迫试验，测定其光合作用指标及生长量。研究发现，不同无性系因对Cd2+抗性不一致导致其在不同浓度出现最高光合指标值。在不同浓度Cd2+（0~25 mg/L）胁迫下，不同无性系Pn随浓度升高均呈现先升高后降低的趋势。当Cd2+达到最高浓度25 mg/L时，无性系L35的Pn值较对照有上升趋势，其余无性系Pn值均有下降趋势。各无性系Gs随镉胁迫加强呈先降低后升高再降低趋势。在Cd2+浓度达到25 mg/L时，各无性系Gs值均有下降趋势，其中无性系中菏1号较对照下降最明显，其次为无性系鲁林16号、鲁林9号、L35、I-107。较Pn、Gs 2个指标无性系间Ci变化不大，与CK相比，在Cd2+浓度达到25 mg/L时，无性系中菏1号较对照下降最明显，其次为无性系L35、鲁林9号；而无性系I-107与鲁林16号较对照有上升趋势。Tr在Cd2+ 浓度为5 mg/L时出现降低，随着浓度增加，蒸腾作用出现先升高后降低的趋势。在Cd2+浓度达到25 mg/L时，各无性系Tr值均有下降趋势，其中无性系中菏1号较对照下降最明显；其次为无性系鲁林9号、鲁林16号、L35、I-107。无性系间的地径和苗高在Cd2+胁迫下存在差异，苗高达到显著水平，而地径未达到显著水平，表明参试无性系苗高性状较地径对Cd2+的胁迫更为敏感。相关分析表明，除了胞间CO2浓度与净光合速率、苗高存在微弱的负相关外，其余性状间均存在不同程度的正相关。主成分分析发现，L35、鲁林9号和I-107的抗重金属Cd2+能力较强，可为重金属Cd污染土壤的治理与修复提供试验材料。
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| 关 键 词： | 重金属 镉 黑杨派无性系 光合作用 |
Effects of Cadmium Stress on the Growth and Photosynthesis of Aigeiros Clones |
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| YAO Jun-xiu,QIAO Yan-hui,YANG Qing-shan,ZHONG Wei-guo,LI Qing-hua,DONG Yu-feng,LI Shan-wen,WU De-jun.Effects of Cadmium Stress on the Growth and Photosynthesis of Aigeiros Clones[J].Journal of Northwest Forestry University,2020,35(2):40-46. |
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| Authors: | YAO Jun-xiu QIAO Yan-hui YANG Qing-shan ZHONG Wei-guo LI Qing-hua DONG Yu-feng LI Shan-wen WU De-jun |
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| Institution: | (Key Laboratory for Genetics and Breeding in Forest Trees of Shandong Province，Shandong Academy of Forestry,Jinan 250014,Shandong,China） |
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| Abstract: | In order to study the effects of heavy metal stress on the photosynthesis of Aigeiros clones,and to provide a theoretical basis for solving the increasingly serious soil heavy metal pollution problem,seedlings of 5 Aigeiros clones were stressed under different concentrations of Cd 2+(namely,5,10,15,20,and 25 mg/L)in this test,and the photosynthesis indicators and growth were measured.It was found that different clones showed the highest photosynthetic index at different Cd 2+concentrations because their resistance to Cd 2+was different.With the increase of Cd 2+concentration in the range of 0 to 25 mg/L,the values of P n of different clones increased first and then decreased.When Cd 2+reached the highest concentration,compared with the control,the P n values of‘L35’showed an upward trend,while other clones showed a downward trend.The values of G s of different clones a trend of decrease-increase-decrease with the increase of cadmium stress.When the concentration of Cd 2+was 25 mg/L,the G s values of all clones showed a downward trend.Compared with the control,‘Zhonghe 1’decreased most significantly,followed by‘Lulin 16’,‘Lulin 9’,‘L35’and‘I-107’.Compared with P n and G s,there was little change in C i among clones.Compared with the control,when the concentration of Cd 2+was 25 mg/L,‘Zhonghe 1’decreased most obviously,followed by‘L35’and‘Lulin 9’,while‘I-107’and‘Lulin 16’showed an upward trend.When the concentration of Cd 2+was 5 mg/L,T r values decreased.With the increase of Cd 2+concentration,transpiration increased first and then decreased.When the concentration of Cd 2+reached 25 mg/L,the Tr values of all clones showed a downward trend,and‘Zhonghe 1’showed the most obvious decline compared with the control,followed by‘Lulin 9’,‘Lulin 16’,‘L35’and‘I-107’.There were differences in ground diameter and height among clones under the Cd 2+stress,the height reached a significant level,however,the ground diameter did not reach a significant level,which indicated that the height traits of the tested clones were more sensitive to Cd 2+stress than the ground diameter.The correlation analysis showed that there was a slight negative correlation between C i and P n,height,however,other traits were positively correlated with varying degrees.Principal component analysis showed that‘L35’,‘Lulin 9’and‘I-107’had strong resistance to Cd,which could provide experimental materials for the treatment and remediation of Cd contaminated soil. |
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| Keywords: | heavy metals Cadmium Aigeiros clones photosynthesis |
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