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首页> 外文期刊>Field Crops Research >Evaluation of direct and indirect effects of flavonoids, mineral elements and dry weight on antiradical scavenging activity in leaf material of field-grown Trifolium pratense cultivars using Path Analysis
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Evaluation of direct and indirect effects of flavonoids, mineral elements and dry weight on antiradical scavenging activity in leaf material of field-grown Trifolium pratense cultivars using Path Analysis

机译：用路径分析法评估黄酮，矿质元素和干重对田间种植的三叶草栽培品种叶片材料清除自由基的直接和间接影响

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In recent years, considerable interest has been focused on the antioxidant potential (including antiradical activity) of crops. Antiradical power (ARP) is influenced by antioxidant compounds, which in turn are controlled by mineral element status. There are relatively few studies considering the variation of assimilated mineral element content (with respective synergies and antagonisms) on secondary metabolites and resultant ARP in plants grown under open-field conditions. The present study was aimed at identifying variables affecting ARP in leaf material of Trifolium pratense L. using Path Analysis as an analytical processing tool. Variation in leaf ARP (2,2-diphenyl-1-picrylhydrazyl scavenging activity), total phenol, flavonoid, mineral element (macro- and micro-elements), and dry weight (DW) content was obtained by growing three T. pratense cultivars (Altaswede, Lucrum and Kvarta) in two non-irrigated, open-field sites (Florence and Consuma) over two consecutive years. Path Analysis then permitted the dissection of genotypic variation (for each locality) in total phenol and flavonoid, mineral element and DW effects on ARP, as well as the underlying mechanisms contributing to the associations between the respective variables and their relative importance in determining ARP. ARP, attributable to effects of DW, and flavonoid and non-flavonoid phenols, was genotype-dependent. Changing tissue DW from hydrated to intermediate levels (Florence), was the greatest positive determinant of ARP in Lucrum and Kvarta in Florence. In the intermediate to more water-stressed tissues, characteristic of Consuma, the flavonoids were direct, positive predictors of ARP in all varieties with N exercising both a negative and the greatest overall effect on ARP through the flavonoids. Altaswede was characterised by higher ARP, flavonoid and Al content than Kvarta, with Lucrum displaying intermediate levels. After more established growth (2007), the indirect impact of N, Ca and DW on both biomass and ARP via chlorophyll and flavonoid content is presented for each locality.
机译：近年来，人们对农作物的抗氧化潜力（包括抗自由基活性）产生了浓厚的兴趣。抗自由基能力（ARP）受抗氧化剂化合物的影响，而抗氧化剂化合物又受矿物质元素状态的控制。很少有研究考虑在田间条件下生长的植物中次生代谢物的同化矿物质元素含量（具有协同作用和拮抗作用）的变化以及由此产生的ARP。本研究旨在使用路径分析作为分析处理工具，确定影响三叶草叶片材料中ARP的变量。通过种植三个鼠尾草（T. pratense）品种获得叶片ARP（2,2-二苯基-1-吡啶并肼基清除活性），总酚，类黄酮，矿质元素（宏和微量元素）和干重（DW）含量的变化。 （Altaswede，Lucrum和Kvarta）连续两年在两个非灌溉的开放场地（佛罗伦萨和Consuma）中。然后，路径分析允许剖析总酚和类黄酮的基因型变异（针对每个位置），矿物质元素和DW对ARP的影响，以及有助于各个变量之间的关联及其在确定ARP中的相对重要性的潜在机制。可归因于DW以及类黄酮和非类黄酮酚的作用的ARP是基因型依赖性的。将组织DW从水合水平改变为中等水平（佛罗伦萨），是Lucrum和佛罗伦萨Kvarta中ARP的最大决定因素。在Consuma特有的水分紧张的中间组织中，类黄酮是所有品种中ARP的直接，积极的预测因子，其中N通过类黄酮对ARP产生负作用和最大的整体作用。 Altaswede的ARP，类黄酮和Al含量高于Kvarta，Lucrum的含量中等。在更加确定的增长之后（2007年），每个地方都呈现出氮，钙和DW通过叶绿素和类黄酮含量对生物量和ARP的间接影响。

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