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Effects of Exogenous Trehalose on the Metabolism of Sugarand Abscisic Acid in Tomato Seedlings Under Salt Stress 预览
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作者 Yanchun Feng Xiuyu Chen +2 位作者 Yulong He Xiaohong Kou Zhaohui Xue 《天津大学学报:英文版》 EI CAS 2019年第5期451-471,共21页
Salt stress a ects the growth and development of plants, which results in a decrease in crop quality and yield. In this study, we used tomato seedlings treated with salt and trehalose as experimental materials and ana... Salt stress a ects the growth and development of plants, which results in a decrease in crop quality and yield. In this study, we used tomato seedlings treated with salt and trehalose as experimental materials and analyzed them using the technique for order preference by similarity to ideal solution analysis to select the optimal trehalose concentration for treatment. We also determined the contents of sugar and abscisic acid (ABA) and detected the expression of genes involved in the metabolism of sugar and ABA by quantitative real-time PCR. Results showed that the optimal trehalose concentration was 2 mmol/L for tomato seedlings under salt stress. Exogenous trehalose decreased the starch content and increased the soluble sugar con- tent by a ecting the expression of genes related to the metabolism of starch and soluble sugar. Exogenous trehalose altered the accumulation and distribution of sugar by inducing the upregulation of sugar transporter genes. Furthermore, trehalose increased the ABA content to induce salt stress response by regulating the expression of genes related to the synthesis and metabolism of ABA. In conclusion, trehalose can e ectively alleviate salt stress and enhance salt tolerance of tomato. These ndings provide a novel perspective and a better resource to investigate the salt tolerance mechanism and a new method for alleviating salt stress in tomato. 展开更多
关键词 Tomato TREHALOSE Salt stress SUGAR METABOLISM SUGAR TRANSPORTER Abscisic acid
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Pretreatment of agricultural residues by supercritical CO2 at 50–80 °C to enhance enzymatic hydrolysis 预览
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作者 Meng-jiao Zhao Qin-qin Xu +4 位作者 Guo-min Li Qiao-zhi Zhang Dan Zhou Jian-zhong Yin Hua-shu Zhan 《能源化学:英文版》 SCIE EI CAS CSCD 2019年第4期39-45,共7页
Various agricultural crop residues including corn stover,corn cob,and sorghum stalk with a moisture content of 75 wt% were subjected to a long pretreatment (12-60h) with supercritical CO2 (scCO2),at low temperature (5... Various agricultural crop residues including corn stover,corn cob,and sorghum stalk with a moisture content of 75 wt% were subjected to a long pretreatment (12-60h) with supercritical CO2 (scCO2),at low temperature (50-80℃) and a pressure of 17.5-25.0 MPa.The sugar yields from the enzymatic hydrolysis (EH) of the pretreated samples were as much as three- to fourfold greater than those afforded by the raw materials.However,when pretreatment was conducted within a short time (e.g.0.5 h),as previously reported in the literature,only a slight increase in the EH sugar yields was observed.The proposed scCO2 pretreatment mechanism demonstrated the role of moisture in the system.Wetting,softening,and swelling were observed to mainly affect the lignocellulose when a suitable amount of water was added.Fin ally,the samples were analysed by X-ray diffraction and scan ning electron microscopy,before and after pretreatment,to investigate the changes in the microscopic structure of the biomass. 展开更多
关键词 LIGNOCELLULOSE scCO2 PRETREATMENT ENZYMATIC HYDROLYSIS SUGAR yield Moisture content
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蒸制时间对滇黄精色泽、可溶性成分及糖含量的影响 预览 被引量:1
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作者 刘明研 冯亚娟 +1 位作者 黄秋正 刘品华 《食品工业科技》 CAS 北大核心 2019年第5期37-41,47共6页
黄精炮制的关键工序是蒸制。为此研究了蒸制时间对产品色泽、可溶性成分及糖含量的影响,并模拟胃肠道环境试验了糖含量的变化。结果表明:色泽随蒸制时间的延长而加深;蒸制24 h,80%vol乙醇可溶性成分增加极显著(p <0.01),达到70.79%,... 黄精炮制的关键工序是蒸制。为此研究了蒸制时间对产品色泽、可溶性成分及糖含量的影响,并模拟胃肠道环境试验了糖含量的变化。结果表明:色泽随蒸制时间的延长而加深;蒸制24 h,80%vol乙醇可溶性成分增加极显著(p <0.01),达到70.79%,而水溶性成分减少极显著(p <0.01),降至9.52%;滇黄精不含淀粉;蒸制48 h葡萄糖和还原糖含量分别增加达到4%和47.84%,变化都极显著(p <0.01);蒸制12 h粗多糖含量最高,达到9.73%,继续蒸制到24 h粗多糖含量下降到4.26%,变化极显著(p <0.01);模拟胃肠道环境后,葡萄糖、粗多糖含量变化不显著(p> 0.05),还原糖含量变化显著(p <0.05)。综上,需要得到粗多糖含量高,葡萄糖含量低的黄精产品蒸制时间应小于12 h,需要得到还原糖、可溶性成分多的黄精产品应蒸制24~48 h。 展开更多
关键词 滇黄精 蒸制 可溶性成分 色泽
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High Performance Liquid Chromatography Analysis of Sugars and Acid Components in‘Xintai Tianhong’Hawthorn Fruit 预览
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作者 Shuwei WEI Shaomin WANG 《农业生物技术:英文版》 CAS 2019年第4期163-164,共2页
[Objectives]This study was conducted to provide basic information for the utilization,quality control and deep processing of‘Xintai Tianhong’hawthorn fruit resources.[Methods]The contents of sugar and acid component... [Objectives]This study was conducted to provide basic information for the utilization,quality control and deep processing of‘Xintai Tianhong’hawthorn fruit resources.[Methods]The contents of sugar and acid components in‘Xintai Tianhong’hawthorn fruit were determined by high performance liquid chromatography(HPLC).[Results]‘Xintai Tianhong’hawthorn fruit contained such four kinds of sugar components as fructose,sorbitol,glucose and sucrose,and such six kinds of organic acid components as oxalic acid,tartaric acid,malic acid,acetic acid,citric acid and succinic acid.The fruit had the highest sucrose content,accounting for 70.53%of the total sugar content,followed by fructose,glucose and sorbitol.For the organic acid components,the content of succinic acid was the highest,accounting for 47.32%of the total acid content,followed by citric acid,malic acid,oxalic acid and tartaric acid,and acetic acid had the lowest content.[Conclusions]‘Xintai Tianhong’hawthorn should be a succinic acid-type hawthorn variety,which can be used as a parent in genetic research and breeding practice. 展开更多
关键词 High performance liquid chromatography HAWTHORN SUGAR Organic acid
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Effects of Seaweed Extracts on Promoting Growth and Improving Stress Resistance in Sugarcane 预览
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作者 Diwen CHEN Ying HUANG +6 位作者 Dachun SHEN Wenling ZHOU Junhua AO Yong JIANG Zhenrui HUANG Hassan Munir Fahd Rasul 《亚洲农业研究:英文版》 2019年第4期69-72,76共5页
A field investigation was executed in sugarcane producing area of Zhanjiang,Guangdong Province with YT03-373 as the test variety to understand the possible impacts of seaweed extracts on phenology,yield and quality at... A field investigation was executed in sugarcane producing area of Zhanjiang,Guangdong Province with YT03-373 as the test variety to understand the possible impacts of seaweed extracts on phenology,yield and quality attributes of sugarcane. Foliar application of seaweed extracts were carried out on sugarcane at seedling and tillering stages. Agronomic traits,yield,sugar content,leaf drought resistance and pest resistance of sugarcane were analyzed for optimization of application time at proper phenological stages. The results that compared to the control,the application of seaweed extracts at different stages of sugarcane enhanced production of sugarcane with increase rate of 10. 83%-12. 87%,and improved theoretical sugar yield of sugarcane up to 1. 9 t/ha while enhancing water retention capacity and water content of sugarcane leaves that consequently led to wilting risk reduction by escaping drought and improved resilience to drought impact on sugarcane. Seaweed extracts also performed excellent in pest management of sugarcane,and they exerted different control effects on sugarcane borers,aphids and thrips. An increase in output of sugarcane was observed to be 15. 09% compared to control,while the net income was improved by up to 32. 64% in the seaweed extracts application treatment. Foliar application of seaweed extracts not only enhanced growth,cold resistance,pest resistance,output value but also improved economic returns,giving a positive affirmation for the recommendation of seaweed extract application. 展开更多
关键词 SEAWEED extracts FOLIAR application SUGAR recovery DROUGHT RESISTANCE Pest RESISTANCE
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Effect of Salinity and Potassium Enrichment on Some Growth Attributes in Sugar Beet (Beta vulgaris L.) 预览
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作者 Fadi Abbas Entessar Al-Jbawi 《农业科学与技术:B》 2019年第3期152-159,共8页
A pot experiment was conducted during winter growing season of 2014 at Homs Agriculture Research Center, General Commission for Scientific Researches (GCSAR), Syria. A factorial experiment arranged according to comple... A pot experiment was conducted during winter growing season of 2014 at Homs Agriculture Research Center, General Commission for Scientific Researches (GCSAR), Syria. A factorial experiment arranged according to complete randomized block design with six replications was used. A combination of four levels of saline irrigation water (tap water, 2,000, 4,000 and 6,000 ppm), with three K levels (180, 360 and 540 ppm), was used to evaluate the effects of saline irrigation water and K enrichment on some growth attributes of two sugar beet varieties (Semper and Alligator). Results showed that all studied growth attributes, i.e., leaf area (LA), leaf number (LN), total dry matter (TDM) and net assimilation rate (NAR) were decreased under salinity stress conditions compared to the control, while K enrichment significantly increased some of the studied characters such as LA, TDM and NAR, but the differences in LN were apparent according to increase in K levels. The variety Semper surpassed significantly the variety Alligator in LA, TDM and NAR. Results also indicated a significant interaction between salinity×potassium enrichment, varieties×potassium enrichment and salinity ? varieties. 展开更多
关键词 SALINITY POTASSIUM ENRICHMENT GROWTH traits sugar BEET (Beta VULGARIS L.)
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GB 2760-2014《食品安全国家标准食品添加剂使用标准》中食糖二氧化硫最大使用量的修改建议 预览
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作者 余娟 余构彬 +3 位作者 高裕锋 王桂华 黄雪影 郭剑雄 《甘蔗糖业》 2019年第3期52-55,共4页
通过查阅国内外文献资料及有关标准,科学合理地对GB2760-2014《食品安全国家标准食品添加剂使用标准》中食糖二氧化硫最大使用量提出几点修改建议。
关键词 GB2760-2014 食糖 二氧化硫 建议
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蜂蜜中糖类的高效液相色谱测定及其在蜂蜜品质控制中的应用研究 预览
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作者 张晓华 《食品研究与开发》 CAS 北大核心 2019年第16期74-79,共6页
蜂蜜营养价值丰富,糖类是其最主要的成分,约占总量的百分之七十五以上。利用高效液相色谱示差折光检测器法检测3个品种、9个产地来源的真蜂蜜和两种掺假蜂蜜中果糖、葡萄糖、蔗糖、麦芽糖和乳糖的含量。然后,基于定量检测结果,利用“简... 蜂蜜营养价值丰富,糖类是其最主要的成分,约占总量的百分之七十五以上。利用高效液相色谱示差折光检测器法检测3个品种、9个产地来源的真蜂蜜和两种掺假蜂蜜中果糖、葡萄糖、蔗糖、麦芽糖和乳糖的含量。然后,基于定量检测结果,利用“简单聚类”分析方法进行蜂蜜产地溯源和掺假鉴别研究。试验结果表明:蜂蜜中糖类含量最高的为果糖,其次是葡萄糖和蔗糖,麦芽糖和乳糖含量较低。掺假蜂蜜以及不同品种、不同产地的真蜂蜜中糖类的含量具有明显差异性,为其产地溯源和掺假鉴别研究奠定基础。基于蜂蜜中糖类的定量结果,来自不同产地的3种蜂蜜都得到了很好的区分,且对于果葡糖浆掺假蜂蜜和真蜂蜜区分效果也令人满意,该方法可行有效,适用于推广使用。 展开更多
关键词 蜂蜜 糖类 产地溯源 掺假鉴别 简单聚类
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糖类在饼干烘烤过程中生成丙烯酰胺和5-羟甲基糠醛的作用研究 预览
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作者 沈成蕊 《广州化工》 CAS 2019年第16期105-108,共4页
制备四种含不同类型糖的饼干:蔗糖、葡萄糖和果糖、仅含果糖、仅含葡萄糖。研究了糖类在饼干烘烤过程中形成丙烯酰胺和5-羟甲基糠醛(HMF)的作用。结果表明,葡萄糖和果糖饼干中HMF浓度最高,而葡萄糖饼干中丙烯酰胺浓度最高。研究表明HMF... 制备四种含不同类型糖的饼干:蔗糖、葡萄糖和果糖、仅含果糖、仅含葡萄糖。研究了糖类在饼干烘烤过程中形成丙烯酰胺和5-羟甲基糠醛(HMF)的作用。结果表明,葡萄糖和果糖饼干中HMF浓度最高,而葡萄糖饼干中丙烯酰胺浓度最高。研究表明HMF是通过焦糖化形成的,丙烯酰胺的形成遵循特定的氨基酸途径。果糖在所有四种饼干类型中通过焦糖化对丙烯酰胺形成和HMF形成起到了相当大的作用。研究结果有助于优化食品配方,选择糖的种类,降低烘焙过程中生成丙烯酰胺和HMF的含量。 展开更多
关键词 丙烯酰胺 5-羟甲基糠醛 烘焙食品
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MdSWEET17,a sugar transporter in apple,enhances drought tolerance in tomato 预览
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作者 LU Jing Sun Mei-hong +4 位作者 MA Qi-jun KANG Hui LIU Ya-jing HAO Yu-jin YOU Chun-xiang 《农业科学学报:英文版》 SCIE CAS CSCD 2019年第9期2041-2051,共11页
Sugars are important energy source and signaling molecule in plant,and sugar transporters such as SWEET(sugars will eventually be exported transporters)play important roles in plant growth and development as well as b... Sugars are important energy source and signaling molecule in plant,and sugar transporters such as SWEET(sugars will eventually be exported transporters)play important roles in plant growth and development as well as biotic and abiotic stresses.In this study,a gene named MdSWEET17 was isolated from apple(Malus×domestic).Expression analysis suggested that MdSWEET17 expressed in all tested tissues(root,stem,leaf,flower and fruit)and the transcript levels were different.Furthermore,MdSWEET17 transgenic tomatoes and wild type were treated with drought.The results showed transgenic lines had higher drought tolerance and accumulated more fructose.Taken together,these findings indicated that MdSWEET17 take part in drought stress response and the regulation of fructose. 展开更多
关键词 APPLE MdSWEET17 DROUGHT SOLUBLE SUGAR TOMATO
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糖磨砂滋养洗面奶配方设计 预览
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作者 任英杰 姜宽宏 +2 位作者 孔光华 顾飞燕 杨晶 《广东化工》 CAS 2019年第12期51-53,共3页
为了制得兼具磨砂和滋养效果的洗面奶,通过使用罗氏泡沫仪、对糖溶解度、光学显微镜、成分分析等手段研究了表面活性剂的泡沫量、稳泡性、溶剂选择、颗粒外貌和糖的营养成分和十六种氨基酸含量。结果表明:表面活性剂椰油酰甘氨酸钾泡沫... 为了制得兼具磨砂和滋养效果的洗面奶,通过使用罗氏泡沫仪、对糖溶解度、光学显微镜、成分分析等手段研究了表面活性剂的泡沫量、稳泡性、溶剂选择、颗粒外貌和糖的营养成分和十六种氨基酸含量。结果表明:表面活性剂椰油酰甘氨酸钾泡沫量最高、稳泡性最好;二丙二醇对糖溶解度最低,以其为溶剂,糖颗粒保存最久;白砂糖颗粒最为均匀,齐整,可用作磨砂粒子;古方红糖蛋白质、氨基酸含量最高,可用于滋养皮肤。基于这些结果,成功制得兼具磨砂和滋养效果的洗面奶。 展开更多
关键词 磨砂 滋养 洗面奶
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番茄果实品质形成及其分子机理研究进展 预览
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作者 尚乐乐 宋建文 +2 位作者 王嘉颖 张余洋 叶志彪 《中国蔬菜》 北大核心 2019年第4期21-28,共8页
番茄营养丰富、风味独特,是世界上消耗量最大的蔬菜之一,近年来人们对番茄品质有着越来越高的要求。影响番茄品质的化学组分包括糖、有机酸、VC、类胡萝卜素等代谢物,它们决定番茄果实独特的风味、营养和外观品质,影响番茄产品的商品性... 番茄营养丰富、风味独特,是世界上消耗量最大的蔬菜之一,近年来人们对番茄品质有着越来越高的要求。影响番茄品质的化学组分包括糖、有机酸、VC、类胡萝卜素等代谢物,它们决定番茄果实独特的风味、营养和外观品质,影响番茄产品的商品性。本文论述了这些物质的代谢途径及其内在调控机制,旨在为番茄品质改良提供新的思路和方法。 展开更多
关键词 番茄 品质 VC 类胡萝卜素 综述
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不同果实发育期干旱胁迫对温州蜜柑果实品质形成的影响 预览
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作者 潘斌 李菲菲 +7 位作者 文斌 熊江 马小川 唐超兰 刘恋 李泽航 卢晓鹏 谢深喜 《果树学报》 CAS CSCD 北大核心 2019年第6期729-737,共9页
【目的】研究不同时期干旱胁迫对果实品质的影响,为提升果实品质及节水灌溉提供理论依据。【方法】以‘山下红’温州蜜柑(Citrus unshiu Marc.)为材料,分析了果实发育过程中细胞分裂期、果实膨大期及较长时期连续干旱后果实外在和内在... 【目的】研究不同时期干旱胁迫对果实品质的影响,为提升果实品质及节水灌溉提供理论依据。【方法】以‘山下红’温州蜜柑(Citrus unshiu Marc.)为材料,分析了果实发育过程中细胞分裂期、果实膨大期及较长时期连续干旱后果实外在和内在品质的变化。【结果】与对照相比,不同果实发育阶段干旱胁迫后果实体积均呈下降趋势,细胞分裂期、果实膨大期、连续干旱期果实体积分别下降22.5%、49.6%、65.7%。对各处理成熟果实分析显示,连续干旱期处理总酸较对照升高86%,总糖升高6.5%,细胞分裂期干旱总酸较对照升高37.3%,总糖下降6%,果实膨大期干旱总酸较对照升高31.8%,总糖升高26.1%。发育过程中果实分析显示,细胞分裂期、果实膨大期和连续干旱严重阻碍了果实中柠檬酸降解,使果实中柠檬酸含量显著升高。【结论】综合不同果实发育阶段干旱胁迫后果实外在与内在品质的响应特点,不同时期干旱胁迫均导致温州蜜柑果实柠檬酸含量升高,细胞分裂期干旱导致果实品质发生高酸低糖的不可逆劣变,果实膨大期干旱对果实体积、糖和酸含量均有巨大影响。 展开更多
关键词 温州蜜柑 干旱胁迫
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Identification of a sugar gustatory receptor and its effect on fecundity of the brown planthopper Nilaparvata lugens
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作者 Wei-Wen Chen Kui Kang +1 位作者 Pan Yang Wen-Qing Zhang 《昆虫科学:英文版》 SCIE CAS CSCD 2019年第3期441-452,共12页
In insects, the gustatory system plays a crucial role in multiple physiological behaviors, including feeding, toxin avoidance, courtship, mating and oviposition. Gustatory stimuli from the environment are recognized b... In insects, the gustatory system plays a crucial role in multiple physiological behaviors, including feeding, toxin avoidance, courtship, mating and oviposition. Gustatory stimuli from the environment are recognized by gustatory receptors. To date, little is known about the function of gustatory receptors in agricultural pest insects. In this study, we cloned a sugar gustatory receptor gene, N/Gr11, from the brown planthopper (BPH), Nilaparvata lugens (Stal), a serious pest of rice in Asia;we then identified its ligands, namely, fructose, galactose and arabinose, by calcium imaging assay. After injection of N/Gr11 doublestranded RNA, we found that the number of eggs laid by BPH decreased. Moreover, we found that N/Gr11 inhibited the phosphorylation of adenosine monophosphate-activated protein kinase (AMPK) and promoted the phosphorylation of protein kinase B (AKT). These findings demonstrated that N/Gr11 could accelerate the fecundity of BPH through AMPK- and AKT-mediated signaling pathways. This is the first report to indicate that a gustatory receptor modulates the fecundity of insects and that the receptor could be a potential target for pest control. 展开更多
关键词 brown PLANTHOPPER FECUNDITY GUSTATORY receptors LIGANDS SUGAR
Correlation between intakes of carbohydrates,protein,and fat with random blood sugar levels in menopausal women 预览
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作者 Ni Wayan Suniyadewi G.N Indraguna Pinatih 《护理前沿(英文)》 CAS 2019年第1期77-80,共4页
Objective:Carbohydrates,proteins,and fats are energy sources needed by the body for performing daily activities and generating primary energy substances.In women who have undergone menopause,the function of thyroid ho... Objective:Carbohydrates,proteins,and fats are energy sources needed by the body for performing daily activities and generating primary energy substances.In women who have undergone menopause,the function of thyroid hormone in their body begins to decline and thus affects the ability of the body to produce energy.The purpose of this study was to determine the correlation between the intakes of carbohydrates,proteins,and fats and random blood sugar levels in menopausal women.Methods:This study was a correlational analytical research with a cross-sectional design,which was conducted in 72 menopausal women recruited by the purposive sampling technique.In this study,a 24-hour food recall form was used,and randomized blood sugar levels were measured using a glucometer.The analysis of the data was performed using a Pearson product moment and multiple linear regression.Results:Carbohydrates and fats together affected random blood sugar levels with an F-value of 25.810 and a p-value of 0.000.Meanwhile,adjusted R2 showed the value of 0.411,indicating that the difference in the intake of carbohydrates and fats together affected random blood sugar levels by 41.1%.Conclusions:Intake of carbohydrates and fats affected random blood sugar levels,whereas the rest were influenced by other factors,and protein intake was unrelated to random blood sugar levels in menopausal women. 展开更多
关键词 CARBOHYDRATE intake fats MENOPAUSAL women PROTEIN RANDOM blood sugar LEVELS
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光质对火龙果糖分积累及其代谢酶活性的影响 预览
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作者 陈心源 殷益明 +3 位作者 朱利鑫 陶宁颖 满坤 贾惠娟 《浙江农业学报》 CSCD 北大核心 2019年第7期1079-1085,共7页
以红肉火龙果紫蜜龙为试材,采用蓝光与红光比例为1 ∶4和1 ∶2两种光质的发光二极管(light emitting diode,LED)进行补光处理,以不补光为对照,测定果实发育过程中蔗糖、葡萄糖和果糖含量以及蔗糖代谢相关酶——酸性转化酶(AI)、中性转化... 以红肉火龙果紫蜜龙为试材,采用蓝光与红光比例为1 ∶4和1 ∶2两种光质的发光二极管(light emitting diode,LED)进行补光处理,以不补光为对照,测定果实发育过程中蔗糖、葡萄糖和果糖含量以及蔗糖代谢相关酶——酸性转化酶(AI)、中性转化酶(NI)、蔗糖合成酶(SS)和蔗糖磷酸合成酶(SPS)的活性,并对果实中糖积累与酶活性的关系进行分析。结果表明,蓝红光比例1 ∶2处理的成熟果实中可溶性固形物、蔗糖含量、SPS和SS活性显著高于其他处理,且AI和NI活性在幼果期后始终显著低于其他处理;除1 ∶4处理成熟果实中果糖含量和AI活性低于CK处理,其他无显著差异。1 ∶2的LED补光处理可以在提高春季首批火龙果产量的同时保持品质稳定,实现优质稳产。光质对糖积累的调控机制可能是,红光较少的光质抑制火龙果果实中AI活性,减少蔗糖分解为葡萄糖和果糖,同时调控SPS和SS合成方向的活性,从而促进果实中蔗糖积累,提高可溶性固形物的含量。 展开更多
关键词 火龙果 发光二极管 果实品质 代谢酶
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Changes in Sugar Metabolism and Fruit Quality of Diff erent Pear Cultivars During Cold Storage 预览
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作者 Yanan Zhao Jinhui Geng +3 位作者 Ying Zhang Kyongil Nam Zhaohui Xue Xiaohong Kou 《天津大学学报:英文版》 EI CAS 2019年第4期389-399,共11页
This study evaluated the changes in sugar metabolism and fruit quality of diff erent pear cultivars during cold storage using seven major commercial pear cultivars belonging to diff erent Pyrus species, such as P. bre... This study evaluated the changes in sugar metabolism and fruit quality of diff erent pear cultivars during cold storage using seven major commercial pear cultivars belonging to diff erent Pyrus species, such as P. bretschneideri Rehd.("Huangguan,""Yali"), P. pyrifolia Nakai.("Wonhwang,""Hosui"), P. ussuriensis Maxim.("Jingbai,""Nanguo"), and P. communis L.("Bartlett"). The fi rmness, respiration rate, titratable acidity, total soluble solids, sugar content, and enzyme activity of the seven pear cultivars were investigated. SPSS was used for analyzing the signifi cance of diff erent indexes. Results showed that fructose was the dominant sugar, accounting for > 60% of total sugars, followed by glucose and sucrose. The respiration peak of almost all cultivars appeared within 60 days. The levels of fructose, glucose, sucrose, and total soluble solids increased within 90 days and then generally decreased. Acid invertase showed the highest activity among all pear cultivars, followed by neutral invertase, sucrose synthetase, and sucrose phosphate synthetase during storage. 展开更多
关键词 PEAR CULTIVAR SUGAR METABOLISM ENZYME activity Quality change
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甜高粱茎秆持汁性研究进展 预览
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作者 冷传远 郝怀庆 景海春 《生物技术通报》 CAS CSCD 北大核心 2019年第5期9-14,共6页
甜高粱是一种新型的能源作物,其显著特点是茎秆中含有大量的水分和糖分,茎秆中水分的含量对于甜高粱的糖产量有重要影响。近年来随着植物分子生物学和大规模重测序技术的发展,对于甜高粱茎秆中持汁性的研究取得了一系列进展。综述了关... 甜高粱是一种新型的能源作物,其显著特点是茎秆中含有大量的水分和糖分,茎秆中水分的含量对于甜高粱的糖产量有重要影响。近年来随着植物分子生物学和大规模重测序技术的发展,对于甜高粱茎秆中持汁性的研究取得了一系列进展。综述了关于甜高粱茎秆持汁性方面的研究进展,并对今后的研究进行了展望,旨为全面了解甜高粱茎秆持汁性的调控机理以及为精准分子育种提供理论依据。 展开更多
关键词 甜高粱 茎秆 水分 糖分
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壶瓶裂枣制作枣酱的工艺优化研究 预览
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作者 王晓婧 《粮食科技与经济》 2019年第5期117-120,133共5页
本文以微波处理后的壶瓶裂枣为原材料,加工制作成枣酱,通过正交优化试验,通过成品的感官评定,确定枣酱的最佳工艺条件。通过单因素及正交优化,得出结论:枣酱成品的最佳工艺为白砂糖160g、柠檬酸0.7g、浓缩时间18min,在此条件下,获得的... 本文以微波处理后的壶瓶裂枣为原材料,加工制作成枣酱,通过正交优化试验,通过成品的感官评定,确定枣酱的最佳工艺条件。通过单因素及正交优化,得出结论:枣酱成品的最佳工艺为白砂糖160g、柠檬酸0.7g、浓缩时间18min,在此条件下,获得的枣酱品质最好,感官评分最高。 展开更多
关键词 裂枣 枣酱 白砂糖 柠檬酸 浓缩时间 感官评定
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寄主和非寄主种子分泌物中游离氨基酸和可溶性糖含量及其对大豆疫霉的作用 预览
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作者 文景芝 高新颖 +7 位作者 赵钰琦 于涵 张卓群 徐莹 宋光梅 陈宇飞 贾梦瑱 阴勃廷 《东北农业大学学报》 CAS CSCD 北大核心 2019年第5期1-7,共7页
采用HPLC技术分析大豆疫霉抗病品种Williams82、感病品种Sloan及非寄主菜豆紫花油豆、玉米绥玉23种子分泌物中游离氨基酸和可溶性糖种类和含量,测定相对原位浓度氨基酸混合液和糖混合液对大豆疫霉菌丝生长、卵孢子形成及游动孢子趋化性... 采用HPLC技术分析大豆疫霉抗病品种Williams82、感病品种Sloan及非寄主菜豆紫花油豆、玉米绥玉23种子分泌物中游离氨基酸和可溶性糖种类和含量,测定相对原位浓度氨基酸混合液和糖混合液对大豆疫霉菌丝生长、卵孢子形成及游动孢子趋化性的影响。结果表明,不同作物品种种子分泌物中氨基酸和糖的种类及含量差异显著。其中,大豆抗病品种种子分泌物中氨基酸和可溶性糖含量显著高于感病品种Sloan和其他两种非寄主作物。对于菌丝生长,除Williams82氨基酸处理表现为抑制外,其他处理均有促进。对于卵孢子形成,氨基酸处理表现为紫花油豆=Williams82>Sloan=绥玉23,可溶性糖处理表现为紫花油豆>Sloan>Williams82>绥玉23。对于游动孢子趋化性,表现为Sloan>紫花油豆>Williams82>绥玉23。4个品种种子分泌物差异主要表现在对游动孢子差异性趋化作用上,表明种子分泌物中游离氨基酸和可溶性糖在一定程度上作为信号分子参与大豆疫霉寄主选择性和寄主抗病性,研究为防治大豆疫霉根腐病提供理论依据。 展开更多
关键词 大豆疫霉 种子分泌物 游离氨基酸 可溶性糖 寄主抗病性 非寄主抗病性
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