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【目的】分析铜川、天水和乐都3个生态区内5个甜樱桃品种的品质,比较果实品质存在的差异。【方法】利用果实品质评价的外观指标和功能营养成分指标,结合主成分分析和聚类分析对甜樱桃果实品质进行综合评价。【结果】不同品种的甜樱桃在不同生态区种植时,外观品质、功能营养成分含量、果形指数和单果质量均存在差异。其中,天水生态区甜樱桃果实硬度要大于其他生态区。乐都生态区樱桃总糖含量最高。铜川生态区除美早外,其他品种可滴定酸含量均高于铜川、天水生态区。不同生态区不同品种维生素C、总酚、总黄酮和原花青素含量均存在差异。【结论】铜川生态区的萨米脱、红灯和雷尼和天水生态区的萨米脱的主要特点为:果型较小,总糖、原花青素和总黄酮含量低,维生素C和总酚含量高。天水生态区的美早、红灯和雷尼,乐都生态区的萨米脱和铜川生态区的美早的主要特点为:单果质量小,硬度大,可滴定酸含量低,糖酸比小。铜川生态区的布鲁克斯,乐都生态区的布鲁克斯、红灯、雷尼、美早和天水生态区的布鲁克斯的主要特点为:果型较大、单果质量大、糖酸比大,总糖、总黄酮和原花青素含量高,可滴定酸和总酚含量低。 相似文献
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30个猕猴桃品种(单株)主要果实品质特征的综合评价 总被引：1，自引：0，他引：1
【目的】通过开展猕猴桃品种(单株)果实品质特征的综合评价,为本地野生猕猴桃资源开发利用、品种选择和品种选育提供科学依据。【方法】以30个猕猴桃品种(单株)果实为材料,测定单果质量、果形指数,以及干物质、可溶性固形物、维生素C、总糖、总酸含量等主要果实品质性状,对其进行主成分分析、综合得分排序和系统聚类分析。【结果】不同猕猴桃品种(单株)果实品质性状差异明显,变异系数为10.95%~53.89%,其中维生素C含量变异程度最大,可溶性固形物含量变异程度最小。主成分分析提取了3个主成分,其累积贡献率为75.675%,根据主成分分析结果计算各品种(单株)综合得分并排序。聚类分析将30个猕猴桃品种(单株)分为5个类群,且主成分分析和聚类分析结果基本一致,红阳、翠玉、晚红、金红50、金桃、米良1号、东红、桂海4号、SZ-07、金艳的综合分值排名靠前,果实品质综合表现较好。【结论】30个猕猴桃品种(单株)的果实品质存在差异,此结果为宜昌猕猴桃产业可持续发展奠定了理论基础。 相似文献
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甜樱桃和酸樱桃品种果实性状的综合评价 总被引：6，自引：0，他引：6
以‘早大果’、‘红灯’等14个生产上早栽培甜樱桃品种和1个酸樱桃品种‘CAB'为试材,研究了不同品种间形态性状、内在品质和主要内含物含量的差异显著性,并对各项测定指标进行相关性检验.结果表明:15个樱桃品种以单果均重、总酸、还原糖、可溶性固形物、花色苷、总酚和维生素C含量差异最明显,可见樱桃果实大小、风味和内含物含量受品种影响显著.相关性检验显示,总酚与总酸;花色苷与还原糖、可溶性固形物;果形指数与总酸、pH值;单果均重与单核均重;果实汁液色泽与糖酸、可溶性固形物、花色苷和总酚呈显著相关关系. 相似文献
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以‘潍科红1号’、‘潍科红3号’和‘潍科红5号’系列番茄为试材,通过对不同品种植株性状、果实性状、果实商品品质和果实营养品质的比较,研究了不同品种在抗性、耐贮运性、适应性、品质等方面的差异性。结果表明:3个番茄新品种在植株性状、果实性状、果实商品品质和营养品质这4个方面明显都优于对照,是3个优良的新品种。‘潍科红1号’番茄红素含量特别高,可达111mg/kg;‘潍科红3号’萼片平展,商品性好,畸形果及裂果率极低;‘潍科红5号’硬度强,可达3.9kg/cm2,货架期可达33d,其中维生素C含量可达288mg/kg,而可溶性固形物含量可达5.8%。 相似文献
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《北方园艺》2020,(13)
以引种的11株‘Hort-16A’黄金猕猴桃和4个野生猕猴桃株群为试材,研究果实的表型性状变异及单果质量、果实硬度、可溶性固形物含量、还原糖含量、可滴定酸含量和维生素C含量的差异,并进行主成分分析,以期改良品种的栽培技术。结果表明:有果形、被毛量、果脐性状3种果实表型性状的变异;果实糖酸含量变异系数较小,维生素C含量变异系数较大,且维生素C含量与糖含量呈负相关;不同的野生型植株在不同的营养品质中其变异系数不一样。野生型猕猴桃和变异株猕猴桃在维生素C含量上有很大差异,但随果实在树上蓄留时间的延长维生素C含量均会降低,可以明显发现变异株猕猴桃的维生素C含量下降的速度比较快;野生型猕猴桃和突变型猕猴桃总酸含量变化差异较小,成熟后均随时间的延长含量下降。利用主成分分析将6个果实性状简化成相对独立的2个主要因子,这2个主成分对变异的累计贡献率可以达74.5%。第1主成分为营养品质因子,方差贡献率为54.84%,第2主成分定义为外形指标因子,方差贡献率为19.65%。 相似文献
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基于主成分与聚类分析综合评价杨凌地区红色鲜食葡萄果实品质 总被引：1，自引：0，他引：1
《果树学报》2020,(4)
【目的】果实品质评价是果树品种优选的基础和前提,比较杨凌地区不同红色鲜食葡萄品种的果实品质差异,可为筛选适合该地区栽培的红色鲜食葡萄品种提供参考。【方法】采用描述性统计、相关性分析、主成分与聚类分析法对该地区12种红色鲜食葡萄果实的22个主要品质性状(单粒质量、果形指数、L~*、a~*、b~*、硬度、脆性、黏着性、弹性、凝聚性、胶黏性、耐咀性、回复性、可溶性固形物含量、还原糖含量、可滴定酸含量、糖酸比、可食率、含水率、出汁率、蛋白质含量、维生素C含量)进行分析,并对各品种果实进行感官品评。【结果】12种红色鲜食葡萄果实各品质性状存在显著差异,部分品质性状间存在相关性;主成分分析提取的前5个主成分累积方差贡献率达88.55%,能够反映果实的基本品质性状;通过系统聚类分析12种红色鲜食葡萄分为4大类;感官评价结果表明‘,无籽红提‘’美人指‘’夏黑’和‘蜜光’果实肉质细脆、汁液丰富、香味浓郁,品质性状较佳‘,京亚‘’摩尔多瓦’和‘早巨选’果实肉质粗糙、口感酸涩,品质相对较差,其他品种居中。【结论】研究结果初步判定了杨凌地区不同品种红色鲜食葡萄果实品质差异,可为进一步选育或生产利用提供参考。 相似文献
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The effects of combinations of salinity (no salt, 2000 p.p.m. or 4000 p.p.m. of CaCl2 and NaCl, 1:1) and water table (30 cm, 60 cm or 90 cm from the soil surface), on the vegetative growth and tolerance of ‘Golden Japanese’ plum and ‘Mit Ghamre’ and ‘Balady’ peaches were studied. The plants were grown in lysimeters. The growth of the trunk, total shoot length, the increase in shoot length per cm and the fresh weight of top, root and total plant were reduced with increasing salinity of the irrigation water. The effect was accentuated when the plants were maintained at high water table level. The salinity treatments resulted in the death of 43%, 73% and 76% of the plants in the plum, and the ‘Mit Ghamre’ and ‘Balady’ peaches, respectively, indicating that the plum is more tolerant to salinity than the peach. The plants of the salinity treatments showed various symptoms of salt injury, such as leaf burn, defoliation, shoot die-back and finally death. In the peaches, salt injury started to occur in the first growing-season, whereas the salt injury appeared in the plum in the second growing-season. The symptoms were more pronounced in the 4000 p.p.m. treatment than in the 2000 p.p.m. treatment and were more pronounced at the high water table level. The salinity level was the predominant factor and the effect of the water table on the vegetative growth diminished with increase in the salinity level of the irrigation water. 相似文献
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AIM：To establish a fast, accurate and economical technique for culturing mouse pulmonary arteriolar smooth muscle cells (PASMCs), and to explore the effects of hypoxia on the proliferation and apoptosis of the PASMCs. METHODS：In sterile condition, the pulmonary artery was isolated from the male BALB/c mice by digesting with collagenase I, and the cells were cultured in fetal bovine serum-coated flask. Centrifugal procedure was not used during the cell passage. The cell morphology was observed under an inverted phase-contrast microscope. α-Smooth muscle actin was identified by immunocytochemistry and immunofluorescence. The effects of hypoxia on the proliferation and apoptosis of the PASMCs were detected by CCK-8 assay and TUNEL assay. RESULTS：PASMCs were identified by the methods of immunocytochemistry, immunofluorescence staining and observation of morphology. Unlike the rat PASMCs with typical subcultured peak-vally pattern, the mouse PASMCs showed a lot different without a peak-vally pattern. The cells could be subcultured after 5 d to 7 d and there was 3 to 5 generations depending on the activity of the cells. CCK-8 assay demonstrated that the A values of PASMCs exposed to hypoxia increased after 24 h (P＜0.05) as compared with normoxia. TUNEL result showed that the apoptotic index of the PASMCs in hypoxia decreased after 24 h (P<0.05). CONCLUSION：This technique for obtaining cultured mouse PASMCs is simple, fast, accurate and economical. The digestion time is easy to control. Hypoxia promotes the proliferation and inhibits the apoptosis of PASMCs. 相似文献
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小檗碱和壳聚糖抗蔬菜病原真菌活性测定及复合膜制备 总被引：2，自引：0，他引：2
研究了小檗碱和壳聚糖对几种常见蔬菜病原真菌的抑制活性,以及以小檗碱和壳聚糖为主料制备复合膜的方法,并测定了该膜的药物释放效果。试验表明:低浓度(0.234 mg/mL)小檗碱即可抑制辣椒炭疽病菌(Vermicularia capsici)等5种蔬菜病原真菌的生长。20 mg/mL浓度壳聚糖对番茄灰霉病菌(Botrytis cinerea)的抑制率高达65%,而对其余4种果蔬病原真菌也有一定的抑制作用。为了集成这2种天然化合物的优点,制备了小檗碱-壳聚糖复合膜,该膜具有缓释功能,在模拟外部环境(磷酸缓冲液,pH 6.8)条件下,20 d小檗碱累计释放率接近25%,提示其在果蔬贮藏抗菌中的应用价值。 相似文献
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Fresh onion seeds desiccated to 6.0% seed moisture content (SMC) were stored in various packaging materials under different storage conditions. Seeds packed in aluminum-laminated pouches beside those stored with silica gel at 25 °C maintained satisfactory germinability and vigour after 12 months. Desiccated seeds stored in moisture impervious containers produced more vigourous seedlings. Germination potential of onion seeds increased with reduced SMC besides storage in moisture impervious packets along with desiccants as physiological and biochemical attributes are regulated. Seed viability and vigour decreased with accelerated ageing due to increased lipid peroxidation, decreased activities of several free radical and peroxide scavenging enzymes. Electrical conductance of seed leachates also increased with ageing. Thus, adoption of appropriate storage temperature and moisture control techniques would significantly affect onion seed quality, which was due to minimum accumulation of free peroxide radicals and enhanced activity of free radical scavenging enzymes. 相似文献
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以大荔县冬枣种植区采集的发病枣果为试材,采用常规组织分离法进行病原菌的分离纯化,通过柯赫氏证病法则、形态学观察及分子生物学分析,研究鉴定了冬枣黑斑病和炭疽病的病原菌种类,并采用田间调查法对2种病害为害特征进行比较分析,以期为田间有效区分冬枣黑斑病和炭疽病为害症状,并快速判断其病原类型,及进一步深入开展精准防控提供参考和指导.结果表明:陕西大荔冬枣黑斑病的病原菌为细极链格孢(Alternaria tenuissima),炭疽病的病原菌为胶孢炭疽菌(Colletotrichum gloeosporioides).2种病害均主要为害枣果实,在枣果果腰或果肩上形成黑褐色病斑,可能同时存在且症状相近极易混淆,但在病斑表面、皮下及久置表型3个方面存在明显区别. 相似文献
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钾肥在小白菜和萝卜上的施用效果 总被引：6，自引：0，他引：6
采用盆栽试验方法研究了施用钾肥对小白菜、萝卜生长发育、产量、品质及钾素含量的影响。结果表明 ,施用钾肥对小白菜和水萝卜的株高、叶片数无显著的影响 ,但可提高水萝卜块根的产量 ,提高幅度为 31.0 4 %～ 97.93%。施用钾肥可提高小白菜和萝卜的蛋白质和VC含量 ,降低硝酸盐含量 ,增加植株的钾素含量 相似文献