低磷胁迫对柱花草生长及抗氧化系统的影响  

Effects of Low Phosphorus Stress on the Growth and Antioxidant System of Stylosanthes

作　　者：王金鹏 廖丽[1] 刘国道[2] 罗丽娟[1] 刘攀道[2] 王志勇[3] WANG Jinpeng;LIAO Li;LIU Guodao;LUO Lijuan;LIU Pandao;WAMG Zhiyong(College of Tropical Crops,Hainan University,Haikou,Hainan 570228,China;Tropical Crop Genetic Resources Institute,Chi-nese Academy of Tropical Agriculture Sciences/Key Laboratory of Crop Gene Resources and Germplasm Enhancement in South-ern China,Ministry of Agriculture and Rural Affairs,Haikou,Hainan 571101,China;Key Laboratory of Genetics and Germplasm Innovation of Tropical Special Forest Trees and Ornamental Plants,Ministry of Education/College of Forestry,Hainan University,Haikou,Hainan 570228,China.)

机构地区：[1]海南大学热带作物学院,海南海口570228 [2]中国热带农业科学院热带作物品种资源研究所/农业农村部华南作物基因资源与种质创新重点实验室,海南海口571101 [3]热带特色林木花卉遗传与种质创新教育部重点实验室/海南大学林学院,海南海口570228

出　　处：《热带作物学报》2021年第10期2875-2880,共6页Chinese Journal of Tropical Crops

基　　金：国家自然科学基金国际(地区)合作与交流项目(No.31861143013)。

摘　　要：以基因型TF291柱花草为供试材料,分析低磷处理(5μmol/L)对柱花草生长、抗氧化物质及抗氧化保护酶的影响,探索柱花草抗氧化系统在低磷胁迫下的响应机制。结果表明:(1)与对照磷处理(250μmol/L)相比,低磷处理抑制了柱花草生长,其叶绿素浓度、最大光化学效率、地上部和根部生物量均显著降低(P<0.05)。(2)随着低磷处理时间的增加,15 d时叶片CAT、POD、SOD、ASP、PAL活性和类黄酮含量显著提升(P<0.05);30 d时叶片CAT、SOD、ASP、PPO活性和MDA、H_(2)O_(2)含量显著提高(P<0.05)。本研究结果可为进一步探索低磷胁迫下柱花草抗氧化系统的分子响应机制提供重要依据。Using genotype TF291 as the test material,the effects of low phosphorus treatment(5μmol/L)on the growth,antioxidant and antioxidant enzymes of Stylosanthes were analyzed to explore the response mechanism of the antioxidant system of Stylosanthes under low phosphorus stress.Compared with the control p treatment(250μmol/L),the low p treatment inhibited the growth of stylox,and the chlorophyll concentration,maximum photochemical efficiency,abovementium and root biomass were significantly reduced(P<0.05).With the increase of the treatment time of low phosphorus,the activity of CAT,POD,SOD,ASP,PAL and the content of flavonoids in leaves were significantly increased at 15 d(P<0.05).The activity of CAT,SOD,ASP,PPO and content of MDA and H_(2)O_(2) in leaves were significantly increased at 30 d(P<0.05).The study would provide an important basis for further exploring the molecular response mechanism of the antioxidant system of Stylosanthes cylindrica under low phosphorus stress.

关 键 词：柱花草 活性氧 低磷胁迫 抗氧化系统 

分 类 号：S541[农业科学—作物学]