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薛云红,刘文爱,方超.白骨壤(Avicennia marina)根系锰含量的积累和影响因素[J].广西科学院学报,2024,40(3):258-266. [点击复制]
- XUE Yunhong,LIU Wen'ai,FANG Chao.Accumulation and Influencing Factors of Mn Content in the Roots of Avicennia marina[J].Journal of Guangxi Academy of Sciences,2024,40(3):258-266. [点击复制]
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| 白骨壤(Avicennia marina)根系锰含量的积累和影响因素 |
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薛云红1,2, 刘文爱1,2, 方超1,2
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| (1.广西科学院, 广西海洋科学院(广西红树林研究中心), 广西红树林保护与利用重点实验室, 广西北海 536000;2.自然资源部北部湾滨海湿地生态系统野外科学观测研究站, 广西北海 536015) |
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| 摘要: |
| 锰是一种植物必需元素，但过量会导致植株死亡。本研究在部分白骨壤Avicennia marina疑似出现锰毒症状的广西北海红树林湿地保护区内设立9个样方，测定样方内白骨壤根系生理生化指标和土壤理化因子；通过方差分析、Pearson相关分析和逐步回归分析等方法分析各因子对白骨壤根系锰含量和土壤Mn2+含量的影响，从而探究白骨壤生长衰弱的原因。结果显示，根系锰含量和土壤Mn2+含量与多种根系生理生化指标、土壤理化因子都有显著相关性。多元逐步回归分析表明：对根系锰含量影响显著的是根系活力、须根鲜重、土壤电导率、土壤含水量,以及须根鲜重、土壤电导率分别与土壤含水量的交互项；对土壤Mn2+含量影响显著的是枯枝率、土壤砂、粉砂、潮位，以及土壤砂和潮位的交互项。研究地根系锰含量为74.60-256.05 mg/kg，远低于深圳生长良好的白骨壤根系锰含量(700 mg/kg)，因此该地白骨壤生长衰弱不是由锰过量直接导致的，白骨壤枯梢原因需要进一步研究。 |
| 关键词: 白骨壤 锰积累 影响因素 根系 红树林 |
| DOI：10.13657/j.cnki.gxkxyxb.20241108.005 |
| 投稿时间：2024-04-26修订日期：2024-08-26 |
| 基金项目:国家自然科学基金项目(32060282，U21A2022)和自治区直属公益性科研院所基本科研业务费项目(GMRC-202403)资助。 |
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| Accumulation and Influencing Factors of Mn Content in the Roots of Avicennia marina |
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XUE Yunhong1,2, LIU Wen'ai1,2, FANG Chao1,2
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| (1.Guangxi Key Laboratory of Mangrove Conservationand Utilization, Guangxi Academy of Marine Sciences (Guangxi Mangrove Research Center), Guangxi Academy of Sciences, Beihai, Guangxi, 536000, China;2.Observation and Research Station of Coastal Wetland Ecosystemin Beibu Gulf, Ministry of Natural Resources, Beihai, Guangxi, 536015, China) |
| Abstract: |
| Manganese is an essential element for plants,but excessive Mn can lead to plant death.In this study,nine sample plots were set up in the Guangxi Beihai mangrove wetland reserve,where Avicennia marina was suspected to have Mn poisoning symptoms.The physiological and biochemical indexes of A.marina root system and soil physical and chemical factors were determined.The effects of various factors on the root Mn content and soil Mn2+ content of A.marina were analyzed by variance analysis,Pearson correlation analysis and stepwise regression analysis,so as to explore the reasons for the growth weakness of A.marina.The results showed that root Mn content and soil Mn2+ content was significantly correlated with various root physiological and biochemical indexes and soil physicochemical factors.Multiple stepwise regression analysis showed that root activity,fibrous root fresh weight,soil electrical conductivity,soil water content,and the interaction between fibrous root fresh weight,soil electrical conductivity and soil water content had significant effects on root Mn content.The significant effects on soil Mn2+ content was withered branch rate,soil sand,silt,tidal level,and the interaction term of soil sand and tidal level.The Mn content of the root system in the study area was 74.60-256.05 mg/kg,which was much lower than that of the well-growing A.marina root system in Shenzhen (700 mg/kg).Therefore,the growth and decline of A.marina in this area was not directly caused by excessive Mn.The cause of A.marina withering needs further study. |
| Key words: Avicennia marina Mn accumulation influence factors root mangrove |
