叶施和根灌ALA对香蕉幼苗冷害的缓解效应

用4种不同浓度ALA分别叶施和根灌巴西蕉幼苗后置于人工气候箱中7℃下模拟低温胁迫,研究ALA不同处理方式对巴西蕉幼苗冷害的影响。结果表明,无论叶施或根灌,ALA均可提高低温胁迫下香蕉幼苗叶片超氧化物歧化酶（SOD）、过氧化物酶（POD）活性,降低超氧阴离子产生速率、MDA含量及相对电导率,同时还可增加脯氨酸、可溶性蛋白含量及相对含水量（RWC）,维持叶绿素的稳定性。以叶施0.50～5.00 mg/L ALA效果最好,与同浓度根灌相比,叶施处理的叶绿素含量均显著增加,相对电导率、丙二醛含量均显著降低,5 mg/L ALA叶施比根灌SOD和POD活性提高了64.5%、12.3%,RWC提高了12....

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Published in西南农业学报 Vol. 25; no. 5; pp. 1781 - 1785
Main Author 黄芳 李茂富 汪良驹 李绍鹏 何娟
Format Journal Article
LanguageChinese
Published 热带园艺植物种质资源与遗传改良教育部重点实验室,海南大学园艺园林学院,海南海口571737%热带园艺植物种质资源与遗传改良教育部重点实验室,海南大学园艺园林学院,海南海口571737 2012
南京农业大学园艺学院,江苏南京210095%南京农业大学园艺学院,江苏南京,210095
Subjects
ALA
冷害
叶施
巴西蕉
根灌
叶施
ALA
冷害
根灌
巴西蕉
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ISSN1001-4829

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Summary:用4种不同浓度ALA分别叶施和根灌巴西蕉幼苗后置于人工气候箱中7℃下模拟低温胁迫,研究ALA不同处理方式对巴西蕉幼苗冷害的影响。结果表明,无论叶施或根灌,ALA均可提高低温胁迫下香蕉幼苗叶片超氧化物歧化酶（SOD）、过氧化物酶（POD）活性,降低超氧阴离子产生速率、MDA含量及相对电导率,同时还可增加脯氨酸、可溶性蛋白含量及相对含水量（RWC）,维持叶绿素的稳定性。以叶施0.50～5.00 mg/L ALA效果最好,与同浓度根灌相比,叶施处理的叶绿素含量均显著增加,相对电导率、丙二醛含量均显著降低,5 mg/L ALA叶施比根灌SOD和POD活性提高了64.5%、12.3%,RWC提高了12.1%,差异均达显著水平。由此表明,ALA叶面喷施可更好地减缓低温胁迫对香蕉造成的冷害。
Bibliography:5-aminolevulinic acid; Brazil banana; Cold damage; Foliar spraying; Root application
51-1213/S
After being foliar sprayed and root applicated with four different 5-aminolevulinic acid（ALA） concentration,Brazil banana seedlings was placed in an artificial climate box with 7 ℃ under low temperature stress to study the effects of different Exogenous ALA treatments on chilling-tolerance of banana.The results showed that treatment of foliar spraying and root application could increase significantly SOD and POD activities,decrease significantly leaves generation rate of superoxide free radical（O-2）,plasmamembrane permeability and MDA content of Brazil banana plant,and enhance significantly the content of proline and soluble protein,maintain the stability of chlorophyll.The 5-aminolevulinic acid concentration was expected to be 0.50 to 5.00 mg/L,compared with the same concentration of root application,the chlorophyll content was significantly increased,plasmamembrane permeability and MDA content were significantly red
ISSN:1001-4829