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Humic Acid Enhances Antioxidant and Glyoxalase Systems to Combat Copper Toxicity in Citrus SCIE
期刊论文 | 2025 , 15 (1) | AGRONOMY-BASEL
WoS CC Cited Count: 2
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Abstract :

Most commercial citrus fruits are grown in acidic soils with high copper (Cu) and low organic matter levels in China. Sweet orange (Citrus sinensis (L.) Osbeck cv. Xuegan) seedlings were treated with 0 (HA0), 0.1 (HA0.1), or 0.5 (HA0.5) mM humic acid (HA) and 0.5 (Cu0.5) or 400 (Cu400 or Cu excess) mu M CuCl2 for 24 weeks. The purpose was to validate the hypothesis that HA reduces the oxidative injury caused by Cu400 in roots and leaves via the coordination of strengthened antioxidant defense and glyoxalase systems. Copper excess increased the superoxide anion production rate by 27.0% and 14.2% in leaves and by 47.9% and 33.9% in roots, the malonaldehyde concentration by 199.6% and 27.8% in leaves and by 369.4% and 77.4% in roots, and the methylglyoxal concentration by 18.2% and 6.6% in leaves and by 381.8% and 153.3% in roots, as well as the H2O2 production rate (HPR) by 70.5% and 16.5% in roots, respectively, at HA0 and HA0.5. Also, Cu400 increased the leaf HPR at HA0, but not at HA0.5. The addition of HA reduced the Cu400-induced production and accumulation of reactive oxygen species and methylglyoxal and alleviated the impairment of Cu400 to the antioxidant defense system (ascorbate-glutathione cycle, antioxidant enzymes, sulfur-containing compounds, and sulfur-metabolizing enzymes) and glyoxalase system in roots and leaves. The HA-mediated amelioration of Cu toxicity involved reduced oxidative injury due to the coordination of strengthened antioxidant defense and glyoxalase systems. These findings highlight the promise of HA for sustainable citrus cultivation in heavy metal (Cu)-polluted soils.

Keyword :

antioxidant enzyme antioxidant enzyme ascorbate-glutathione cycle ascorbate-glutathione cycle copper and humic acid treatments copper and humic acid treatments glyoxalase system glyoxalase system methylglyoxal methylglyoxal reactive oxygen species reactive oxygen species sulfur metabolism sulfur metabolism

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GB/T 7714 Huang, Wei-Tao , Chen, Xu-Feng , Huang, Wei-Lin et al. Humic Acid Enhances Antioxidant and Glyoxalase Systems to Combat Copper Toxicity in Citrus [J]. | AGRONOMY-BASEL , 2025 , 15 (1) .
MLA Huang, Wei-Tao et al. "Humic Acid Enhances Antioxidant and Glyoxalase Systems to Combat Copper Toxicity in Citrus" . | AGRONOMY-BASEL 15 . 1 (2025) .
APA Huang, Wei-Tao , Chen, Xu-Feng , Huang, Wei-Lin , Shen, Qian , Lu, Fei , Lai, Ning-Wei et al. Humic Acid Enhances Antioxidant and Glyoxalase Systems to Combat Copper Toxicity in Citrus . | AGRONOMY-BASEL , 2025 , 15 (1) .
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Why is the combined treatment of copper and aluminum more toxic to citrus than single factor treatment? SCIE
期刊论文 | 2025 , 496 | JOURNAL OF HAZARDOUS MATERIALS
WoS CC Cited Count: 1
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Most citrus trees are planted on acidic soils, where aluminum (Al) and copper (Cu) phytotoxicity often coexists. This study investigated the effects of Cu alone, Al alone and combined Cu and Al (Cu+Al) on root exudates, rhizosphere alkalization, photosynthetic performance, oxidative damage, and Cu, Al, and water uptake in hydroponic Citrus sinensis seedlings. Cu-induced exudation of organic acids, amino acids, carbohydrates, fatty acids, nucleotides and derivatives, vitamins, phenolics, alkaloids, and terpenoids might play a role in Cu detoxification. However, Al-induced secretion of flavonoid-type phenolics might play a more important role in Al detoxification than Al-induced secretion of organic acids. Generally viewed, the amounts and types of exudates secreted by the roots treated with Cu alone were greater than those secreted by the roots treated with Al alone. The greater toxicity of Cu alone to citrus than Al alone might be due to the greater oxidative stress and lower water uptake. Al alone and Cu+Al lowered root-induced rhizosphere alkalization more than Cu alone. Cu+Al was more toxic to citrus than Cu or Al alone, as revealed by a greater decrease in water uptake and impairment in photosynthetic performance. The greater toxicity of Cu+Al to citrus than Cu alone might be related to decreased rhizosphere alkalization due to increased exchangeable Al3+ and consequent Al3+ uptake, reduced amounts and types of root exudates, and increased root-to-shoot Cu translocation. The greater toxicity of Cu+Al to citrus than Al alone might be related to greater oxidative damage and increased root-to-shoot Al translocation.

Keyword :

Aluminum toxicity Aluminum toxicity Copper toxicity Copper toxicity Flavonoid-type phenolics Flavonoid-type phenolics Rhizosphere alkalization Rhizosphere alkalization Root exudates Root exudates

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GB/T 7714 Chen, Wen-Shu , Wu, Ti , Xia, Tian-Tian et al. Why is the combined treatment of copper and aluminum more toxic to citrus than single factor treatment? [J]. | JOURNAL OF HAZARDOUS MATERIALS , 2025 , 496 .
MLA Chen, Wen-Shu et al. "Why is the combined treatment of copper and aluminum more toxic to citrus than single factor treatment?" . | JOURNAL OF HAZARDOUS MATERIALS 496 (2025) .
APA Chen, Wen-Shu , Wu, Ti , Xia, Tian-Tian , Tong, Liang-Yuan , Lu, Fei , Ye, Xin et al. Why is the combined treatment of copper and aluminum more toxic to citrus than single factor treatment? . | JOURNAL OF HAZARDOUS MATERIALS , 2025 , 496 .
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“万物土中生、人才土中育”的土壤学课程教学改革探索与实践
期刊论文 | 2025 , PageCount-页数: 9 (03) , 89-97 | 高等农业教育
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Abstract :

土壤学是高等农林院校农林相关专业的核心基础课,旨在通过系统的理论知识学习和实践技能训练,培养符合农林业发展需求和服务乡村振兴的高素质人才。新农科建设背景下,破解土壤学传统教学中存在的“六重六轻”痛点,强化思政融入和引领作用,推行科研反哺教学改革,探索“用爱教学、用情引领、用心垂范、用行指导、用智培优、用责笃行”的“六用”教学模式创新,构建“悯农学农”方能“知农爱农”才能“强农兴农”的“六农”人才培养路径,实现了“万物土中生、人才土中育”的新时代农林特色课程教育教学改革目标。

Keyword :

农林专业 农林专业 土壤学 土壤学 教学改革 教学改革 新农科 新农科

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GB/T 7714 郭九信 , 蒋芳市 , 张黎明 . “万物土中生、人才土中育”的土壤学课程教学改革探索与实践 [J]. | 高等农业教育 , 2025 , PageCount-页数: 9 (03) : 89-97 .
MLA 郭九信 et al. "“万物土中生、人才土中育”的土壤学课程教学改革探索与实践" . | 高等农业教育 PageCount-页数: 9 . 03 (2025) : 89-97 .
APA 郭九信 , 蒋芳市 , 张黎明 . “万物土中生、人才土中育”的土壤学课程教学改革探索与实践 . | 高等农业教育 , 2025 , PageCount-页数: 9 (03) , 89-97 .
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Mechanisms of coumarin against copper toxicity in citrus leaves based on physiological, transcriptomic, and metabolomic analysis SCIE
期刊论文 | 2025 , 237 | INDUSTRIAL CROPS AND PRODUCTS
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Citrus trees are mainly cultivated in acidic soil with high available Cu. The objective of this study was to reveal the mechanisms of coumarin (COU) against Cu toxicity in citrus leaves. 'Xuegan' (Citrus sinensis (L.) Osbeck) seedlings were submitted to 100 (COU100) or 0 (COU0) mu M COU and 400 (Cu400) or 0.5 (Cu0.5) mu M CuCl2 for 24 weeks. Thereafter, the study used widely targeted metabolome, RNA-Seq, Fourier transform infrared (FTIR) spectroscopic analysis, and physiological methods to examine metabolite abundances, gene expression levels, and some related physiological parameters (electrolyte leakage, nonstructural carbohydrates (NCs), total free amino acids, total soluble proteins, total flavonoids, and total phenolics) in leaves; FTIR spectra in leaf cell wall (CW) materials (CWMs); and Ca and Cu concentrations in leaves and CWMs. The results suggested that COU100 alleviated Cu toxicity in leaves by a combination of factors: (a) maintaining the homeostasis of Ca and Cu, as well as the structure and function of CWs and plasma membranes; (b) alleviating Cu400-induced leaf senescence and growth inhibition due to less damages to CWs, cell division, and cell growth; (c) enhancing the capability to keep a balance between reactive oxygen species formation and scavenging; and (d) reducing Cu400-induced alterations in primary and secondary metabolisms. Leaves of COU0-treated seedlings (LCOU0) exhibited some adaptive responses to Cu400. For example, Cu400 increased the fractions of Ca, Cu, and pectin in CWs and the accumulation of NCs and secondary metabolites, and upregulated some antioxidants and genes related to antioxidant defense in LCOU0.

Keyword :

Citrus sinensis Citrus sinensis Copper Copper Coumarin Coumarin Fourier transform infrared Fourier transform infrared Leaf senescence Leaf senescence Secondary metabolites Secondary metabolites

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GB/T 7714 Huang, Wei-Lin , Wu, Ti , Xie, Rong-Rong et al. Mechanisms of coumarin against copper toxicity in citrus leaves based on physiological, transcriptomic, and metabolomic analysis [J]. | INDUSTRIAL CROPS AND PRODUCTS , 2025 , 237 .
MLA Huang, Wei-Lin et al. "Mechanisms of coumarin against copper toxicity in citrus leaves based on physiological, transcriptomic, and metabolomic analysis" . | INDUSTRIAL CROPS AND PRODUCTS 237 (2025) .
APA Huang, Wei-Lin , Wu, Ti , Xie, Rong-Rong , Xia, Tian-Tian , Tong, Liang-Yuan , Chen, Xu-Feng et al. Mechanisms of coumarin against copper toxicity in citrus leaves based on physiological, transcriptomic, and metabolomic analysis . | INDUSTRIAL CROPS AND PRODUCTS , 2025 , 237 .
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Boron reduces the damage of copper toxicity to Citrus sinensis cell wall structure and function via maintaining copper, calcium, magnesium, potassium and phosphorus homeostasis in subcellular fractions SCIE
期刊论文 | 2025 , 45 (10) | TREE PHYSIOLOGY
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Commercial citrus trees are predominantly grown in acidic soils with low boron (B) and high copper (Cu) concentrations. There are limited data on how B-Cu treatments affect the concentrations and distributions of nutrients in leaf and root subcellular fractions. Citrus sinensis seedlings were exposed to 2.5 (B2.5) or 25 (B25) mu M H3BO3 x 0.5 (Cu0.5) or 350 (Cu350) mu M CuCl2 for 24 weeks. Thereafter, we assayed the concentrations of Cu, calcium, magnesium, potassium and phosphorus in leaf and root cell wall (CW) fraction, organelle fraction and soluble fraction, as well as the expression levels of genes related to their homeostasis. B25 reduced Cu350-induced damage of CW structure and function via alleviating Cu350-induced increment in the Cu concentration and decrements in the calcium, magnesium, potassium and phosphorus concentrations, as well as Cu350-induced alterations of their distributions in root and leaf subcellular fractions, thereby promoting seedling growth. Also, leaves and roots of B2.5-treated seedlings displayed some adaptive responses to Cu350. Cu350 increased the distribution of Cu in CW fraction to prevent it from entering more sensitive targets, and the distributions of calcium, magnesium and potassium in CW fraction to maintain CW structure and function. However, Cu350 decreased the distribution of phosphorus in CW fraction, but increased the release of phosphate from organic-phosphate compounds and the conversion of pyrophosphate into phosphate to maintain phosphate homeostasis. Therefore, the study provided novel evidence for B alleviating Cu toxicity in citrus via maintaining the Cu, calcium, magnesium, potassium and phosphorus homeostasis in subcellular fractions, and a scientific basis for the rational application of calcium, magnesium, potassium and phosphorus fertilizers in woody crops (citrus) to prevent Cu toxicity.

Keyword :

boron deficiency boron deficiency organelle fraction organelle fraction pyrophosphate pyrophosphate

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GB/T 7714 Chen, Xu-Feng , Huang, Wei-Lin , Tong, Liang-Yuan et al. Boron reduces the damage of copper toxicity to Citrus sinensis cell wall structure and function via maintaining copper, calcium, magnesium, potassium and phosphorus homeostasis in subcellular fractions [J]. | TREE PHYSIOLOGY , 2025 , 45 (10) .
MLA Chen, Xu-Feng et al. "Boron reduces the damage of copper toxicity to Citrus sinensis cell wall structure and function via maintaining copper, calcium, magnesium, potassium and phosphorus homeostasis in subcellular fractions" . | TREE PHYSIOLOGY 45 . 10 (2025) .
APA Chen, Xu-Feng , Huang, Wei-Lin , Tong, Liang-Yuan , Xia, Tian-Tian , Wu, Ti , Lu, Fei et al. Boron reduces the damage of copper toxicity to Citrus sinensis cell wall structure and function via maintaining copper, calcium, magnesium, potassium and phosphorus homeostasis in subcellular fractions . | TREE PHYSIOLOGY , 2025 , 45 (10) .
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Nitrate improves plant growth by promoting nitrogen assimilation and photosynthetic performance in citrus seedlings SCIE
期刊论文 | 2025 , 25 (1) | BMC PLANT BIOLOGY
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Background Nitrate (represented by NN or NO3--N) and ammonium (represented by AN or NH4+-N) are the two predominant nitrogen (N) forms utilized by plants; however, the physiological mechanisms underlying citrus response to different N forms are still poorly understood. In this study, seedlings of two citrus varieties (Citrus reticulata Blanco cv. Lugan and Citrus sinensis (L.) Osbeck cv. Xuegan) were cultivated under two N forms (NN and AN, at 4 mmol L-1) to investigate their ultrastructural, physiological, and biochemical characteristics. Results Compared with AN treatment, NN treatment significantly promoted plant growth by regulating the physiological and morphological characteristics of roots and leaves. Under AN conditions, there was an excessive accumulation of free amino acids and soluble proteins in both leaves and roots, which suppressed the activity of N assimilation enzymes and consequently reduced plant N uptake. Furthermore, AN treatment inhibited photosynthetic performance by decreasing chlorophyll content, damaging chloroplast structure, and disrupting photosynthetic electron transport chain. Consequently, this led to the accumulation of non-structural carbohydrates in both leaves and roots, ultimately affecting the morphogenesis of citrus plants. Additionally, AN treatment induced an oxidative stress response, increasing malondialdehyde (MDA) levels and eliciting an antioxidant response in citrus seedlings. Moreover, based on measured physiological parameters, principal component analysis showed an obvious separation between AN and NN treatments. Conclusions Our findings demonstrated that NN supply enhanced plant growth owing to the improved coordination of carbon and N metabolism in citrus plants, thereby providing a basis for optimizing N management strategies in sustainable citrus production.

Keyword :

Citrus plants Citrus plants N assimilation N assimilation N forms N forms Photosynthesis Photosynthesis Ultrastructure Ultrastructure

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GB/T 7714 Xu, Hao , Hu, Wenlang , Du, Kaiyuan et al. Nitrate improves plant growth by promoting nitrogen assimilation and photosynthetic performance in citrus seedlings [J]. | BMC PLANT BIOLOGY , 2025 , 25 (1) .
MLA Xu, Hao et al. "Nitrate improves plant growth by promoting nitrogen assimilation and photosynthetic performance in citrus seedlings" . | BMC PLANT BIOLOGY 25 . 1 (2025) .
APA Xu, Hao , Hu, Wenlang , Du, Kaiyuan , Dong, Yan , Fan, Qingru , Huang, Zengrong et al. Nitrate improves plant growth by promoting nitrogen assimilation and photosynthetic performance in citrus seedlings . | BMC PLANT BIOLOGY , 2025 , 25 (1) .
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琯溪蜜柚地上部新生器官生物量和钙镁养分累积特征
期刊论文 | 2024 , 41 (01) , 101-112 | 果树学报
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【目的】针对琯溪蜜柚[Citrus grandis(L.)Osbeck‘Guanximiyou’]生产中钙(Ca)和镁(Mg)养分严重缺乏的现状,通过解析树体周年地上部新生器官生长发育动态,定量分析其不同生育期Ca和Mg的累积特性,为钙镁养分优化管理、助力蜜柚提质增效生产提供理论依据。【方法】于2019—2020年,在琯溪蜜柚原产地福建省平和县,选取10年生盛果期红肉蜜柚树为试验材料,分别在春梢萌发期、开花期、幼果期、果实膨大期和果实成熟期进行周年5次地上部新生器官样品采集,并测定其叶片(挂果叶和未挂果叶)、枝条(挂果枝和未挂果枝)、果实(果肉和果皮)和落花落果的生物量及其Ca、Mg养分吸收的动态特性。【结果】蜜柚地上部新生器官生物量随生育进程逐渐增加,2019和2020年成熟期蜜柚地上部新生器官生物量平均为17.12 kg·株~(-1),其叶片、枝条和果实分别占24.14%、3.89%和71.97%,并以未挂果叶(23.19%)、未挂果枝(3.56%)和果肉(44.54%)部分为主,而开花期落花落果生物量为0.57 kg·株~(-1)。除果肉Ca含量(w,后同)逐渐下降和未挂果枝Mg含量逐渐增加外,蜜柚各新生器官的Ca含量均随生育进程呈上升趋势,而Mg含量则整体呈现出下降变化,成熟期各器官Ca和Mg含量整体上呈现出未挂果枝>未挂果叶>挂果枝>挂果叶>果皮>果肉。同时,除成熟期叶片Mg累积量有所降低外,蜜柚地上部各新生器官Ca和Mg累积量均随生育进程逐渐增加,其中,叶片和枝条中的Ca和Mg累积分配量逐渐下降而果实中逐渐增加,且主要分配在未挂果叶和果皮中。2019和2020年成熟期蜜柚地上部新生器官Ca和Mg累积量平均分别为223.58和25.34 g·株~(-1),其叶片、枝条和果实Ca累积量分别占63.10%、11.03%和25.87%,而Mg累积量则分别占42.75%、7.92%和49.33%。表观养分平衡估算指出,以750株·hm~(-2)计,盛果期蜜柚周年地上部新生器官需要吸收Ca 169.18 kg·hm~(-2)和Mg 19.78 kg·hm~(-2),而落花落果的养分损失或归还为Ca 1.50 kg·hm~(-2)和Mg 0.77 kg·hm~(-2)。【结论】定量了盛果期琯溪蜜柚地上部新生器官的生物量以及Ca和Mg养分的含量、累积与分配特性,并估算了Ca和Mg养分的表观平衡,结果可为琯溪蜜柚养分优...

Keyword :

地上部新生器官 地上部新生器官 琯溪蜜柚 琯溪蜜柚 生物量 生物量 表观养分平衡 表观养分平衡 钙镁养分 钙镁养分

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GB/T 7714 陶晶霞 , 王玉雯 , 李晓娜 et al. 琯溪蜜柚地上部新生器官生物量和钙镁养分累积特征 [J]. | 果树学报 , 2024 , 41 (01) : 101-112 .
MLA 陶晶霞 et al. "琯溪蜜柚地上部新生器官生物量和钙镁养分累积特征" . | 果树学报 41 . 01 (2024) : 101-112 .
APA 陶晶霞 , 王玉雯 , 李晓娜 , 张利军 , 张建翔 , 张华 et al. 琯溪蜜柚地上部新生器官生物量和钙镁养分累积特征 . | 果树学报 , 2024 , 41 (01) , 101-112 .
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基于土壤质量指数法省级尺度耕地土壤质量评价及空间分布特征研究——以福建省为例
期刊论文 | 2024 , 55 (02) , 310-320 | 土壤通报
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【目的】探讨福建省土壤常规五项指标的土壤质量评价及其空间分布状况,为因地制宜地保护和提升省域耕地土壤质量提供科学依据。【方法】以2019年福建省4756组耕地土壤常规五项指标(包括土壤pH值、有机质、碱解氮、有效磷和速效钾)数据为基础,应用土壤质量指数(Soil quality index,SQI)方法和GIS技术进行土壤质量评价和空间分布图绘制。【结果】福建省土壤常规五项指标的平均值分别为pH值5.48、有机质23.01 g kg~(-1)、碱解氮146.69 mg kg~(-1)、有效磷74.00 mg kg~(-1)、速效钾145.74 mg kg~(-1),表现出省域土壤酸化严重、有效磷和速效钾丰富、有机质和碱解氮适中的现状,且“闽东南”的土壤pH、有效磷和速效钾高于“闽西北”,而有机质和碱解氮则是“闽西北”高于“闽东南”。土壤质量评价结果显示,福建省SQI的平均值为0.637,其中,厦门市SQI最高为0.671,泉州市SQI最低为0.558;有效磷在SQI中的贡献最大26.20%,而pH值则最小11.07%,且SQI与各土壤指标均显著正相关。同时,福建省SQI空间分布整体上呈“闽西北”高于“闽东南”的变化趋势。【结论】福建省耕地土壤质量整体以中高等水平为主,严重的土壤酸化和过量的有效磷是关键限制因子,建议积极开展以土壤酸化改良和磷肥减施为核心的土壤质量提升研究,推动农业绿色发展。

Keyword :

土壤养分 土壤养分 土壤质量指数 土壤质量指数 土壤质量评价 土壤质量评价 福建省 福建省 空间分布 空间分布

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GB/T 7714 吴文元 , 金海涛 , 王玉雯 et al. 基于土壤质量指数法省级尺度耕地土壤质量评价及空间分布特征研究——以福建省为例 [J]. | 土壤通报 , 2024 , 55 (02) : 310-320 .
MLA 吴文元 et al. "基于土壤质量指数法省级尺度耕地土壤质量评价及空间分布特征研究——以福建省为例" . | 土壤通报 55 . 02 (2024) : 310-320 .
APA 吴文元 , 金海涛 , 王玉雯 , 张卫清 , 张华 , 廖文强 et al. 基于土壤质量指数法省级尺度耕地土壤质量评价及空间分布特征研究——以福建省为例 . | 土壤通报 , 2024 , 55 (02) , 310-320 .
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基于土壤质量指数法省级尺度耕地土壤质量评价及空间分布特征研究
期刊论文 | 2024 , 55 (2) , 310-320 | 土壤通报
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[目的]探讨福建省土壤常规五项指标的土壤质量评价及其空间分布状况,为因地制宜地保护和提升省域耕地土壤质量提供科学依据.[方法]以2019年福建省4756组耕地土壤常规五项指标(包括土壤pH值、有机质、碱解氮、有效磷和速效钾)数据为基础,应用土壤质量指数(Soil quality index,SQI)方法和GIS技术进行土壤质量评价和空间分布图绘制.[结果]福建省土壤常规五项指标的平均值分别为pH值5.48、有机质23.01 g kg-1、碱解氮146.69 mg kg-1、有效磷74.00 mg kg-1、速效钾145.74 mg kg-1,表现出省域土壤酸化严重、有效磷和速效钾丰富、有机质和碱解氮适中的现状,且"闽东南"的土壤pH、有效磷和速效钾高于"闽西北",而有机质和碱解氮则是"闽西北"高于"闽东南".土壤质量评价结果显示,福建省SQI的平均值为0.637,其中,厦门市SQI最高为0.671,泉州市SQI最低为0.558;有效磷在SQI中的贡献最大26.20%,而pH值则最小11.07%,且SQI与各土壤指标均显著正相关.同时,福建省SQI空间分布整体上呈"闽西北"高于"闽东南"的变化趋势.[结论]福建省耕地土壤质量整体以中高等水平为主,严重的土壤酸化和过量的有效磷是关键限制因子,建议积极开展以土壤酸化改良和磷肥减施为核心的土壤质量提升研究,推动农业绿色发展.

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土壤养分 土壤养分 土壤质量指数 土壤质量指数 土壤质量评价 土壤质量评价 福建省 福建省 空间分布 空间分布

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GB/T 7714 吴文元 , 金海涛 , 王玉雯 et al. 基于土壤质量指数法省级尺度耕地土壤质量评价及空间分布特征研究 [J]. | 土壤通报 , 2024 , 55 (2) : 310-320 .
MLA 吴文元 et al. "基于土壤质量指数法省级尺度耕地土壤质量评价及空间分布特征研究" . | 土壤通报 55 . 2 (2024) : 310-320 .
APA 吴文元 , 金海涛 , 王玉雯 , 张卫清 , 张华 , 廖文强 et al. 基于土壤质量指数法省级尺度耕地土壤质量评价及空间分布特征研究 . | 土壤通报 , 2024 , 55 (2) , 310-320 .
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Boron-mediated amelioration of copper toxicity in Citrus sinensis seedlings involved reduced concentrations of copper in leaves and roots and their cell walls rather than increased copper fractions in their cell walls SCIE
期刊论文 | 2024 , 467 | JOURNAL OF HAZARDOUS MATERIALS
WoS CC Cited Count: 12
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Abstract :

Little information is available on how boron (B) supplementation affects plant cell wall (CW) remodeling under copper (Cu) excess. 'Xuegan' (Citrus sinensis) seedlings were submitted to 0.5 or 350 mu M Cu x 2.5 or 25 mu M B for 24 weeks. Thereafter, we determined the concentrations of CW materials (CWMs) and CW components (CWCs), the degree of pectin methylation (DPM), and the pectin methylesterase (PME) activities and PME gene expression levels in leaves and roots, as well as the Cu concentrations in leaves and roots and their CWMs (CWCs). Additionally, we analyzed the Fourier transform infrared (FTIR) and X-ray diffraction (XRD) spectra of leaf and root CWMs. Our findings suggested that adding B reduced the impairment of Cu excess to CWs by reducing the Cu concentrations in leaves and roots and their CWMs and maintaining the stability of CWs, thereby improving leaf and root growth. Cu excess increased the Cu fractions in leaf and root pectin by decreasing DPM due to increased PME activities, thereby contributing to citrus Cu tolerance. FTIR and XRD indicated that the functional groups of the CW pectin, hemicellulose, cellulose, and lignin could bind and immobilize Cu, thereby reducing Cu cytotoxicity in leaves and roots.

Keyword :

Boron Boron Cell wall Cell wall Citrus sinensis Citrus sinensis Copper toxicity Copper toxicity Pectin Pectin

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GB/T 7714 Chen, Huan-Huan , Zheng, Zhi-Chao , Hua, Dan et al. Boron-mediated amelioration of copper toxicity in Citrus sinensis seedlings involved reduced concentrations of copper in leaves and roots and their cell walls rather than increased copper fractions in their cell walls [J]. | JOURNAL OF HAZARDOUS MATERIALS , 2024 , 467 .
MLA Chen, Huan-Huan et al. "Boron-mediated amelioration of copper toxicity in Citrus sinensis seedlings involved reduced concentrations of copper in leaves and roots and their cell walls rather than increased copper fractions in their cell walls" . | JOURNAL OF HAZARDOUS MATERIALS 467 (2024) .
APA Chen, Huan-Huan , Zheng, Zhi-Chao , Hua, Dan , Chen, Xu-Feng , Huang, Zeng-Rong , Guo, Jiuxin et al. Boron-mediated amelioration of copper toxicity in Citrus sinensis seedlings involved reduced concentrations of copper in leaves and roots and their cell walls rather than increased copper fractions in their cell walls . | JOURNAL OF HAZARDOUS MATERIALS , 2024 , 467 .
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