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彩色马铃薯块茎形成和贮藏过程中花色苷变化及抗氧化活性分析 总被引:1,自引:0,他引:1
以不同彩色马铃薯基因型为材料,对块茎形成和贮藏过程中花色苷的种类及含量变化进行了研究。结果表明,在块茎发育过程中,不同马铃薯基因型块茎中花色苷出现的时间与含量多少各有差异,颜色较深的基因型花色苷达到最高含量的时间先于颜色浅的基因型,且不同组分的出现与累积变化规律基本上与花色苷合成的先后顺序一致;在常温和低温贮藏过程中,花色苷含量均呈下降趋势,但下降比例并无明显差异。抗氧化活性测定表明,几种彩色马铃薯基因型块茎均有一定的清除DPPH· 和ABTS+能力以及Fe3+ 还原能力,但不同基因型间抗氧化能力存在差异。 相似文献
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花色苷作为一种天然色素及高抗氧化活性物质,具有优良的保健功效。与地上器官相比,块根、块茎等地下器官中的花色苷具有高含量、高产量、易储存等优点,是一种高效、稳定、易于利用的花色苷来源。彩色马铃薯、紫甘薯、紫淮山等植物地下器官富含花色苷,本文对植物花色苷特别是地下器官花色苷的合成及其调控机制进行了综述,并展望了今后的研究重点。 相似文献
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以山葡萄花色素苷提取液为试材,研究了光、热、pH、过氧化氢、抗坏血酸、金属离子、山梨酸钾、黄原胶等不同因素对山葡萄花色苷稳定性的影响.结果表明:光对花色苷稳定性影响较大;温度60℃以上花色苷降解明显;酸性环境中花色苷稳定性显著高于碱性环境;过氧化氢对花色苷具有破坏作用;抗坏血酸可以起到保护花色苷作用,但久置后反向促使花色苷的分解;Fe3+、山梨酸钾增加了花色苷的稳定性;黄原胶对花色苷稳定性影响不显著. 相似文献
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《果树学报》2015,(6)
【目的】中国具有丰富的野生葡萄资源,分析各野生种果皮花色苷的组分,对中国野生葡萄的鉴别、分类及综合开发利用具有重要的意义。【方法】以‘玫瑰香’‘普列文玫瑰’‘赤霞珠’和‘黑比诺’等4个欧亚种品种为对照,以刺葡萄、桑叶葡萄、蘡薁、山葡萄、腺枝葡萄、华东葡萄和1个分类地位未知的野生葡萄等中国野生葡萄为材料,利用14个花色苷标准品,采用高效液相色谱-紫外检测器(HPLC-UV)法分析其果皮中花色苷的组分和含量。【结果】欧亚种葡萄果皮中花色苷以单糖花色苷为主,而除腺枝葡萄外,中国野生葡萄果皮中的花色苷多以双糖花色苷为主;欧亚种葡萄果皮花色苷以二甲基花翠素(Mv)类花色苷为主,花葵素(Pg)类花色苷含量较少,而中国野生葡萄果皮中含有较多Pg类花色苷;除刺葡萄个别株系外,中国野生葡萄果皮中花色苷的总量明显高于欧亚种;中国野生葡萄不同种间花色苷的组分和含量存在较大差异。【结论】中国野生葡萄果皮中花色苷的组分和含量与欧亚种存在显著差异,且各野生种类之间也存在差异,可为野生葡萄的鉴别、分类和利用提供依据。 相似文献
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《中国蔬菜》2021,(7)
采用高效液相色谱-蒸发光散射检测法(HPLC-ELSD)测定我国马铃薯主栽品种块茎糖苷生物碱的含量,并研究不同覆盖方式和烘烤加工对马铃薯块茎糖苷生物碱含量的影响。结果表明:我国51个马铃薯主栽品种块茎糖苷生物碱含量为106.28~3770.50 mg · kg~(-1)(DW),其中有7个品种块茎糖苷生物碱含量超过了安全值1000 mg · kg~(-1)(DW);与未加工处理相比,烘烤后的马铃薯块茎糖苷生物碱含量显著降低,有利于提高马铃薯品种块茎的安全性;黑色地膜覆盖种植的马铃薯块茎糖苷生物碱含量最低,显著低于露地栽培,覆膜后再覆土对块茎糖苷生物碱含量的影响不大,种植马铃薯应采用黑色地膜覆盖方式,从而获得低糖苷生物碱含量的块茎。 相似文献
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研究了花瓣花色苷的提取方法及不同浓度的双氧水、亚硫酸钠、蔗糖、葡萄糖、柠檬酸、Na+、Zn2+、Ca2+、Cu2+溶液及不同pH等对紫叶碧桃花色苷的影响。结果表明:以0.5%HCl和75%乙醇为浸提剂在65℃恒温提取3h,提取效果最好。在影响其稳定性的各因子中,pH对花色苷影响显著,在酸性条件下,花色苷具有良好的热稳定性。金属离子Na+、Zn2+、Ca2+在不同浓度下对花色苷影响不显著,Cu2+较显著。花色苷的还原能力不显著,抗氧化性显著。在自然光和黑暗条件下花色苷吸光度均不显著。蔗糖、葡萄糖、柠檬酸对其颜色与性质的影响均不显著。 相似文献
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Torgils Fossen 《The Journal of Horticultural Science and Biotechnology》2013,88(3):360-363
SummaryThe anthocyanin content of tubers and shoots of the purple potato, Solanum tuberosum cv. Congo has been determined using various chromatographic and spectroscopic techniques to be petanin and the novel 3-O-[6-(4-ferulyl-O-α-rhamnopyranosyl)-β-glucopyranoside]-5-O-β-glucopyranosides of petunidin and malvidin. Acylated pigments constitute more than 98% of the total anthocyanin content both in tubers and shoots. 相似文献
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采用农价云对马铃薯价格的实时监控数据,对河北省马铃薯2019年第一季度价格进行省际横向比较以及近3年同期纵向比较,并分析影响马铃薯价格的因素。结果显示:河北省2019年第一季度马铃薯日均价格呈先上升后下降趋势,最低价格为1月2日的1.78元/kg,最高价格为2月9日的2.90元/kg,但总体波动较为平稳;与山东省、甘肃省相比,河北省第一季度马铃薯价格差距不大,但与全国日均价格存在一定差距。分析结果发现马铃薯库存情况、市场需求、季节因素带来的其他蔬菜价格上升是影响河北省第一季度马铃薯价格的主要原因。 相似文献
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《Scientia Horticulturae》2005,106(3):318-329
Mycorrhizal fungi serve as biofertilizers, reduce plant stress, and can increase plant productivity. Since the potato originated from the highlands of Peru and Bolivia, a goal of this research was to utilize indigenous Peruvian mycorrhizal populations to enhance crop productivity in a subsistence production site. The field study was also conducted to test the effectiveness of the flavonoid, formononetin, to stimulate native mycorrhizal activity and subsequent yield of six Andean potato (Solanum tuberosum L.) cultivars. The subsistence site was located at an altitude of 3900 m (61 kPa) in San Jose de Aymara (Department of Huancavelica), in the central highlands of Peru. This is approaching the highest altitude in the world that potatoes are grown. The site had a sandy–loam soil with pH 3.6, low phosphorus (P) availability and high aluminum (Al). Tubers were planted in November 1999, and grown during the rainy season. Minimal organic fertilizer was applied and the potato crop received no supplementary irrigation. Formononetin was applied as a soil drench when shoots from tubers began to emerge. At the end of the 6.5 month study, formononetin increased either potato tuber dry mass and/or Nos. 1 and 2 grade tubers in three of the six cultivars. Soil sporulation of indigenous mycorrhizae was increased more than three-fold by formononetin. There were differences in total mycorrhizal colonization among the six cultivars. The predominant arbuscular mycorrhiza genera at the site were Gigaspora, Glomus and Scutellosporas. 相似文献
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Treatment of potato (Solanum tuberosum L.) with chlorocholine chloride (CCC) applied twice as a foliar spray 25 and 30 days after planting has shown to decrease shoot and stolon growth but increase tuber yield. However, the regulatory role of CCC on translocation of recently fixed photoassimilates into different parts of potato plants has not been fully illustrated. In this study, 14C-isotope labelling technique was used to estimate the photosynthetic capacity and photoassimilate partitioning among leaves, stems, roots + stolons, and tubers of potted potatoes treated with 1.5 g l−1 CCC. CCC treatment significantly increased tuber dry mass but reduced leaf dry mass. CCC-treated leaves had significantly higher chlorophyll and carotenoid contents and assimilated 22.0% more 14CO2 per leaf dry mass than the controls. Compared with the control, CCC treatment reduced the translocation of 14C-photoassimilates into leaves, stems and roots + stolons but increased that into tubers. CCC-treated leaves exported 14.6% more 14C-photoassimilates into other parts of the plants. In addition, CCC treatment reduced 14C-soluble sugar and 14C-starch accumulation in leaves and stems but enhanced them in tubers and roots + stolons. Collectively, the results indicate that CCC treatment significantly improves the photosynthetic capacity of potato leaves and promotes photoassimilates partitioning into tubers thereby enhancing tuber growth. 相似文献