| 不同紫云英基因型根系分泌物中有机酸成分分析 |
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| 引用本文： | 林新坚,兰忠明,张辉,王飞,何春梅.不同紫云英基因型根系分泌物中有机酸成分分析[J].草业学报,2014,23(4):146-152. |
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| 作者姓名： | 林新坚 兰忠明 张辉 王飞 何春梅 |
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| 作者单位： | 福建省农业科学院土壤肥料研究所农业资源与环境研究中心,福建福州350013 |
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| 基金项目： | 公益性行业(农业)科研专项经费项目(201103005-01-05)资助 |
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| 摘 要： | 土壤有效磷含量低是影响作物生长的重要限制因素之一。作物根分泌有机酸活化难溶性磷对改善其磷素营养具有重要意义。以9个紫云英品种为研究对象,采用土培原位方法收集紫云英根系分泌物(有机酸),利用高效液相色谱(HPLC)测定分泌物中有机酸成分及含量。结果表明,紫云英根系分泌草酸、苹果酸、乳酸、乙酸、柠檬酸、琥珀酸等,品种之间差异明显,但个别品种有机酸变异系数较大。紫云英根系分泌的苹果酸、琥珀酸与生物量拟合相关系数差异达到极显著水平,呈极显著正相关。因此,所分泌的苹果酸和琥珀酸含量的高低可以一定程度上表征紫云英生物量高低。另外,紫云英根系分泌的有机酸总量与生物量呈显著正相关关系(P<0.05)。因此,有机酸分泌的高低,尤其是苹果酸、琥珀酸对紫云英植株生长及生物量影响显著。
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| 关 键 词： | 紫云英 有机酸 生物量 难溶性磷 养分 |
| 收稿时间： | 2013-07-09 |
Organic acid composition analysis of root exudation of Chinese milk vetch genotypes |
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| LIN Xin-jian,LAN Zhong-ming,ZHANG Hui,WANG Fei,HE Chun-mei.Organic acid composition analysis of root exudation of Chinese milk vetch genotypes[J].Acta Prataculturae Sinica,2014,23(4):146-152. |
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| Authors: | LIN Xin-jian LAN Zhong-ming ZHANG Hui WANG Fei HE Chun-mei |
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| Institution: | Institute of Soil and Fertilizer,Fujian Academy of Agricultural Sciences Agricultural Resource and Environmental Centre,Fujian Academy of Agricultural Sciences,Fuzhou 350013,China |
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| Abstract: | A low soil phosphorus content is one of the most important limiting factors affecting crop growth. Root exudations of organic acids which can activate insoluble phosphate have an important effect on enhancing crop P nutrition. Nine Chinese milk vetch (Astragalus sinicus) species were selected as research objects using soil culture in-situ methods to collect root exudates (organic acids) and high performance liquid chromatography (HPLC) was used to measure organic acid compositions and contents. Chinese milk vetch root exudates contain oxalic acid,malic acid,lactic acid,acetic acid,and succinic acid. There were significant differences between species,but the coefficient of individual species had large variations. There were significant positive correlations between malic acid and biomass,and between succinic acid and biomass. Thus,to some extent,the amount of malic and succinic acid secretion could represent the level of Chinese milk vetch biomass. In addition,the correlation between the total amount of organic acids and biomass was significantly (P<0.05) positive. Therefore,the level of exudation of organic acids,malic and succinic acids in particular,has a significant impact on Chinese milk vetch plant growth and biomass. |
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