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The normal phosphorus (NP, 1.0 mmol·L-1 KH2PO4) and low phosphorus (LP, 0.01 mmol·L-1 KH2PO4) stresses were imposed by nutrient solution sand culture method. Five different concentrations of MT were applied to the roots of alfalfa seedlings under LP stress to determine their morphology and physiological indicators. The results show that: 90 μmol·L-1 MT has the best effect in alleviating low phosphorus stress in alfalfa. The plant height, leaf area, aboveground and underground biomass, relative water content, root vitality, transpiration rate, stomatal conductance, net photosynthetic rate, contents of chlorophyll a, chlorophyll b, carotenoids, chlorophyll, proline, soluble sugar and soluble protein, as well as the activities of superoxide dismutase, peroxidase and catalase were all significantly increased. The concentrations of malondialdehyde and intercellular CO2 were significantly reduced. Principal component analysis indicated that chlorophyll content, soluble sugar content, and leaf stomatal conductance could be used as key indicators for the growth and development of alfalfa under low phosphorus stress by MT. In conclusion, exogenous MT can enhance the activity of antioxidant enzymes and the content of osmotic regulatory substances in alfalfa seedlings under LP stress, and improve their tolerance to low phosphorus., authors=HE Rong1, NAN Li-li1, GUO Jia-yu1, TIAN Ge1, YANG Li-li1, authorsList=HE Rong, NAN Li-li, GUO Jia-yu, TIAN Ge, YANG Li-li, authorCompany=1 College of Pratacultural Science/Gansu Agricultural University/Key Laboratory of Grassland Ecosystem, Ministry of Education/Key Laboratory of Forage Gerplasm Innovation and New Variety Breeding of Ministry of Agriculture and Rural Affairs, Lanzhou, Gansu Province 730070, China, correspAuthors=null, authorNote=null, correspAuthorsNote=null, copyrightStatement=null, copyrightOwner=null, extLink=null, articleAbsUrl=null, sourceXml=null, magXml=null, pdfUrl=null, pdf=null, pdfFileSize=null, pdfExtLink=null, richHtmlUrl=null, mobilePdfUrl=null, reviewReport=null, pdfFirstPage=null, abstractGraph=null, abstractGraphContent=null, abstractVideo=null, citation=null, cebUrl=null, magXmlContent=null, mapNumber=null, fund=null), CN=ArticleExt(id=1309569657250603755, articleId=1309569656973779690, tenantId=1146029695717560320, journalId=1308397196074385509, language=CN, title=外源褪黑素对低磷胁迫下紫花苜蓿生长及生理特性的影响, columnId=1309565024058835950, journalTitle=草地学报, columnName=研究论文, runingTitle=null, highlight=null, articleAbstract=为研究外源褪黑素(Melatonin,MT)对低磷胁迫下紫花苜蓿(Medicago sativa)生长及生理特性的影响,以种质‘7890’和‘15578’为材料,采用营养液砂培法进行常磷(Normal phosphorus,NP 1.0 mmol·L⁻¹ KH₂PO₄)和低磷(Low phosphorus,LP 0.01 mmol·L⁻¹ KH₂PO₄)胁迫,对LP胁迫下苜蓿幼苗根灌5种不同浓度MT,测定其形态及生理指标。结果表明:90 μmol·L⁻¹ MT缓解苜蓿低磷胁迫效果最佳,其株高、叶面积、地上及地下生物量、相对含水量、根系活力、蒸腾速率、气孔导度、净光合速率、叶绿素a、叶绿素b、类胡萝卜素、叶绿素、脯氨酸、可溶性糖和可溶性蛋白含量及超氧化物歧化酶、过氧化物酶、过氧化氢酶活性均显著升高,丙二醛和胞间CO₂浓度显著降低。主成分分析表明,叶绿素含量、可溶性糖含量、叶片气孔导度可作为MT对低磷胁迫下苜蓿生长发育的关键指标。综上,外源MT能增强LP胁迫下苜蓿幼苗抗氧化酶活性和渗透调节物质含量,提高其耐低磷性。, authors=何蓉1, 南丽丽1, 郭佳雨1, 田戈1, 杨丽丽1, authorsList=何蓉, 南丽丽, 郭佳雨, 田戈, 杨丽丽, authorCompany=1 甘肃农业大学草业学院/草业生态系统教育部重点实验室/农业农村部饲草种质创新与新品种选育重点实验室, 甘肃 兰州 730070, correspAuthors=null, authorNote=何蓉(1999-),女,汉族,贵州龙里人,硕士研究生,主要从事牧草栽培与育种研究,E-mail:1015268173@qq.com, correspAuthorsNote=null, copyrightStatement=null, copyrightOwner=null, extLink=null, articleAbsUrl=null, sourceXml=null, magXml=null, pdfUrl=null, pdf=VLccO3A5132gdcv+i44uoA==, pdfFileSize=1548727, pdfExtLink=null, richHtmlUrl=null, mobilePdfUrl=null, reviewReport=null, pdfFirstPage=null, abstractGraph=null, abstractGraphContent=null, abstractVideo=null, citation=null, cebUrl=null, magXmlContent=null, mapNumber=null, fund=国家自然科学基金 (32160327); 财政部和农业农村部:国家现代农业产业技术体系 (CARS-34))}, authors=null, keywords=[Keyword(id=1309569657477096173, tenantId=1146029695717560320, journalId=1308397196074385509, articleId=1309569656973779690, language=CN, orderNo=1, keyword=苜蓿), Keyword(id=1309569657544205038, tenantId=1146029695717560320, journalId=1308397196074385509, articleId=1309569656973779690, language=CN, orderNo=2, keyword=褪黑素), Keyword(id=1309569657623896815, tenantId=1146029695717560320, 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草地学报 | 研究论文 2026,34(2): 632-642
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草地学报 |研究论文 2026 , 34 (2) : 632 -642
外源褪黑素对低磷胁迫下紫花苜蓿生长及生理特性的影响
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何蓉1, 南丽丽1, 郭佳雨1, 田戈1, 杨丽丽1
作者信息
    1 甘肃农业大学草业学院/草业生态系统教育部重点实验室/农业农村部饲草种质创新与新品种选育重点实验室, 甘肃 兰州 730070
作者简介:
何蓉(1999-),女,汉族,贵州龙里人,硕士研究生,主要从事牧草栽培与育种研究,E-mail:1015268173@qq.com
Effects of Exogenous Melatonin on the Growth and Physiological Characteristics of Alfalfa under Low Phosphorus Stress
  • HE Rong1, NAN Li-li1, GUO Jia-yu1, TIAN Ge1, YANG Li-li1
  • Affiliations
      1 College of Pratacultural Science/Gansu Agricultural University/Key Laboratory of Grassland Ecosystem, Ministry of Education/Key Laboratory of Forage Gerplasm Innovation and New Variety Breeding of Ministry of Agriculture and Rural Affairs, Lanzhou, Gansu Province 730070, China
    doi: 10.11733/j.issn.1007-0435.2026.02.025
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    为研究外源褪黑素(Melatonin,MT)对低磷胁迫下紫花苜蓿(Medicago sativa)生长及生理特性的影响,以种质‘7890’和‘15578’为材料,采用营养液砂培法进行常磷(Normal phosphorus,NP 1.0 mmol·L⁻¹ KH₂PO₄)和低磷(Low phosphorus,LP 0.01 mmol·L⁻¹ KH₂PO₄)胁迫,对LP胁迫下苜蓿幼苗根灌5种不同浓度MT,测定其形态及生理指标。结果表明:90 μmol·L⁻¹ MT缓解苜蓿低磷胁迫效果最佳,其株高、叶面积、地上及地下生物量、相对含水量、根系活力、蒸腾速率、气孔导度、净光合速率、叶绿素a、叶绿素b、类胡萝卜素、叶绿素、脯氨酸、可溶性糖和可溶性蛋白含量及超氧化物歧化酶、过氧化物酶、过氧化氢酶活性均显著升高,丙二醛和胞间CO₂浓度显著降低。主成分分析表明,叶绿素含量、可溶性糖含量、叶片气孔导度可作为MT对低磷胁迫下苜蓿生长发育的关键指标。综上,外源MT能增强LP胁迫下苜蓿幼苗抗氧化酶活性和渗透调节物质含量,提高其耐低磷性。
    苜蓿  /  褪黑素  /  低磷胁迫  /  过氧化物酶
    To investigate the effects of exogenous Melatonin (MT) on the growth and physiological characteristics of alfalfa (Medicago sativa) under low phosphorus stress, germplasms ‘7890’ and ‘15578’ were used as materials. The normal phosphorus (NP, 1.0 mmol·L-1 KH2PO4) and low phosphorus (LP, 0.01 mmol·L-1 KH2PO4) stresses were imposed by nutrient solution sand culture method. Five different concentrations of MT were applied to the roots of alfalfa seedlings under LP stress to determine their morphology and physiological indicators. The results show that: 90 μmol·L-1 MT has the best effect in alleviating low phosphorus stress in alfalfa. The plant height, leaf area, aboveground and underground biomass, relative water content, root vitality, transpiration rate, stomatal conductance, net photosynthetic rate, contents of chlorophyll a, chlorophyll b, carotenoids, chlorophyll, proline, soluble sugar and soluble protein, as well as the activities of superoxide dismutase, peroxidase and catalase were all significantly increased. The concentrations of malondialdehyde and intercellular CO2 were significantly reduced. Principal component analysis indicated that chlorophyll content, soluble sugar content, and leaf stomatal conductance could be used as key indicators for the growth and development of alfalfa under low phosphorus stress by MT. In conclusion, exogenous MT can enhance the activity of antioxidant enzymes and the content of osmotic regulatory substances in alfalfa seedlings under LP stress, and improve their tolerance to low phosphorus.
    Alfalfa  /  Melatonin  /  Low phosphorus stress  /  Peroxidase
    何蓉, 南丽丽, 郭佳雨, 田戈, 杨丽丽. 外源褪黑素对低磷胁迫下紫花苜蓿生长及生理特性的影响. 草地学报, 2026 , 34 (2) : 632 -642 . DOI: 10.11733/j.issn.1007-0435.2026.02.025
    HE Rong, NAN Li-li, GUO Jia-yu, TIAN Ge, YANG Li-li. Effects of Exogenous Melatonin on the Growth and Physiological Characteristics of Alfalfa under Low Phosphorus Stress[J]. Acta Agrestia Sinica, 2026 , 34 (2) : 632 -642 . DOI: 10.11733/j.issn.1007-0435.2026.02.025

      国家自然科学基金 (32160327); 财政部和农业农村部:国家现代农业产业技术体系 (CARS-34)

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    2026年第34卷第2期
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    2种不同金属材料的力学参数
    科
    Family
    属数
    Number of
    genus
    种数
    Number of
    species
    占总种数比例
    Percentage of
    total species (%)
    属
    Genus
    种数
    Number of
    species
    占总种数比例
    Percentage of total
    species (%)
    鹅膏菌科Amanitaceae 2 11 5.26 鹅膏菌属 Amanita 10 4.78
    小菇科 Mycenaceae 2 12 5.74 丝盖伞属 Inocybe 5 2.39
    多孔菌科 Polyporaceae 8 14 6.70 蜡蘑属 Laccaria 5 2.39
    红菇科 Russulaceae 3 23 11.00 小皮伞属 Marasmius 6 2.87
    小菇属 Mycena 11 5.26
    光柄菇属 Pluteus 5 2.39
    红菇属 Russula 17 8.13
    栓菌属 Trametes 5 2.39
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