High surface area and mesoporous activated carbon from KOH-activated dragon fruit peels for methylene blue dye adsorption:Optimization and mechanism study

In this study,an alternative precursor for production of activated carbon was introduced using dragon fruit(Hylocereus costaricensis)peel(DFP).Moreover,KOH was used as a chemical activator in the thermal carbonization process to convert DFP into activated carbon(DFPAC).In order to accomplish this research,several approaches were employed to examine the elemental composition,surface properties,amorphous and crystalline nature,essential active group,and surface morphology of the DFPAC.The BrunauerEmmettTeller test demonstrated a mesoporous structure of the DFPAC has a high surface area of 756.3 m2g 1.The cationic dye Methylene Blue(MB)was used as a probe to assess the efficiency of DFPAC towards the removal of MB dye from aqueous solution.The effects of adsorption input factors(e.g.DFPAC dose(A:0.040.12 g L 1),pH(B:310),and temperature(C:3050℃))were investigated and optimized using statistical analysis(i.e.BoxBehnken design(BBD)).The adsorption kinetic model can be best categorized as the pseudofirst order(PFO).Whereas,the adsorption isotherm model can be best described by Langmuir model,with maximum adsorption capacity of DFPAC for MB dye was 195.2 mg g 1 at 50℃.The adsorption mechanism of MB by DFPAC surface was attributed to the electrostatic interaction,pp interaction,and Hbonding.Finally,the results support the ability of DFP to be a promising precursor for production of highly porous activated carbon suitable for removal of cationic dyes(e.g.MB).

Insights into flavonoid biosynthesis during cucumber fruit peel coloration based on metabolite profiling and transcriptome analyses

The fruit peel color is a crucial trait of cucumber.To better understand the molecular mechanisms underlying cucumber peel coloration,we compared the UPLC-ESI-MS/MS-based flavonoid metabolomic and RNA sequencing-based transcriptomic profiling of the brown peeled cucumber line‘PW’at six developmental stages.A total of 210 flavonoid metabolites were identified.Of which,117 flavonoid metabolites were differentially accumulated.In this study,weighted gene co-expression network analysis combined with Kyoto Encyclopedia of Gene and Genomes enrichment analysis revealed key genes coding for seven enzymes and eight transcription factors(TFs)associated with flavonoid biosynthesis.Among them,the R2R3MYB CsaV3_4G001130 is the best candidate gene that is responsible for controlling mature fruit colors in cucumber.Sanger sequencing revealed one nonsynonymous SNP in the exon of CsaV3_4G001130 among the selected 11 cucumber lines,which introduced a premature stop codon,generating a truncated protein in pale yellow or creamy peeled fruits.Yeast two-hybrid assays showed a direct interaction of CsaV3_4G001130 with the bHLH TF CsaV3_1G002260 and the WD40 protein CsaV3_5G001800.However,the interactions were influenced by the nonsynonymous SNP we identified.Our finding revealed that the integrated transcriptome and metabolome analysis further demonstrated that the abundance of some pigmented flavonoids(especially anthocyanins and chalcones)contributed to the coloration of‘PW’fruits.These findings pave the way for elucidation of flavonoid biosynthesis and improvement of cucumber peel color in the future.

Studies on Changes of Phenolics in the Apple Fruit Peel in Response to Light Intensity

Fruits from 9-year-old apple trees (Malus domestic Borkh. cv. Fuji) were wrapped by two-layerbag in middle of June, and bags were removed in middle of September. The bag-removed treatmentwas performed in following three ways: once-removing all inner and outer bags; twice-removingbag (removing inner bag 3 d after removing outer bag); dipping 5 s in 1 mM salicylic acid (SA)after once-removing all bags. Changes of phenolic compounds in fruit peel in response to lightenvironment were studied before or after removing bag. The results showed that the baggedtreatment could significantly decrease the contents of UV (ultraviolet)absorbing compounds,rutin and anthocyanins of the fruit peel, but increased chlorogenic acid level. After removalof bag, the level of SA and quercetin in the fruit peel appeared peak 1 d after bag-removed,except that quercetin was decreased in SA-treated fruits. UV absorbing compounds, anthocyaninsand rutin were kept increasing all along after the removal of bag, except that chlorogenic acidwas decreased during being retained inner bag in the treatment of twice removing bag. Thepositive correlations existed between changes of UV absorbing compounds and changes ofanthocyanins or rutin. It was suggested that light played an important role in phenolicsmetabolism.

Adsorption Isotherm Study of Activated Fruit Peels for Copper Removal

Heavy metal polluted water threatens the integrity of ecosystem.The use of agricultural waste as adsorbent becomes popular due to its biodegradability and availability.However,limited research works has been done to process agricultural waste for heavy metal adsorption purpose.The objective of this study is to propose a new approach to treat banana peel using ZnCl_(2) prior to alkali and acid treatment and explore the potential of dragon fruit peels as the adsorbent for Cu^(2+)adsorption.Seven adsorption isotherm was adopted to identify the adsorption mechanism and four statistical parameters were calculated for model verification purpose.The experiment was conducted by dispersing ZnCl_(2) treated and untreated adsorbents into Cu^(2+) solution.Results showed that ZnCl_(2) treated adsorbents performed better in terms of Cu^(2+) removal compared with untreated adsorbents due to higher surface area for Cu^(2+) adsorption.The treated banana peel(Act.-B)performed approximately 30%better than the treated dragon fruit peel(Act.-D)due to the presence of hydroxyl and carboxyl groups.The equilibrium adsorptive capacity of Act.-B was 1872.8 mg Cu^(2+)/g and the experimental data fitted Freundlich isotherm well with R^(2)=0.9978,0.0161 of residual sum of error(SSE),0.0068 of χ^(2),and 0.0567 of root mean square error(RMSE)values.This suggests non⁃linear adsorption and multilayer adsorption on heterogenous surfaces.Thus,it is recommended to further improve the surface properties of Act.-B by steam pyrolysis and surface modification.

基于Mask-RCNN的自然场景下油茶果目标识别与检测

针对我国油茶果采摘过程中存在的自动化水平落后、采摘效率低、适采周期短的现状,应用于机器人收获技术的机器视觉技术受限于真实场景中复杂背景干扰从而导致识别精度较低的问题。以自然场景下的油茶果为研究对象,提出一种基于Mask-RCNN的自然场景下油茶果目标识别与检测算法,首先获取油茶果图像并建立数据集,利用ResNet卷积神经网络提取油茶果果实图片的特征,获得果实目标分割结果,再采用RPN对所得到的特征图进行操作,并增加全连接层,提取每个样本mask像素面积,并对目标类别进行预测。利用测试集分别测试油茶果的分割网络模型及目标识别算法,结果表明,网络模型的分割准确率为89.85%,油茶果目标识别的平均检测精度为89.42%,召回率为92.86%。本算法能够自动检测油茶果目标,并有效降低不同光照情况下叶片与花苞遮挡、果实重叠、果实色泽等因素干扰,为自然场景中果实自动化采摘提供可靠的视觉支持。

采用改进Mask R-CNN算法定位鲜食葡萄疏花夹持点

为实现鲜食葡萄疏花机械化与自动化,该研究提出了一种鲜食葡萄疏花夹持点定位方法。首先基于ResNeXt骨干网络并融合路径增强,改进MaskR-CNN模型,解决鲜食葡萄花穗、果梗目标较小难以检测的问题;进而针对花穗、果梗生长姿态的复杂性与不确定性,提出一种集合逻辑算法,该算法采用IoU函数剔除重复检测的花穗与果梗,建立花穗、果梗对,并对果梗掩模进行形态学开运算,利用集合关系获取主果梗掩模,确定以主果梗质心附近的中心点为果梗的夹持点。最后,随机选取测试集中的图像进行试验。试验结果表明:果梗夹持点平均定位准确率为83.3%,平均定位时间为0.325 s,夹持点x、y方向定位误差及定位总误差最大值分别为10、12和16像素,能够满足鲜食葡萄疏花的定位精度与速度要求,可为实现鲜食葡萄疏花机械化与自动化提供理论支撑。

In vitro antioxidant activity and potential inhibitory action against α-glucosidase of polysaccharides from fruit peel of tea(Camellia sinensis L.)

The conditions for extracting polysaccharides from tea （Camellia sinensis L.） fruit peel （TFPPs） were studied. Three parameters （temperature, time, and liquid/solid ratio） affecting the extraction of TFPP were optimized using response surface methodology （RSM）. Under the optimized conditions, the yield of TFPP was predicted to be 4.98%. The physicochemical properties, in vitro antioxidant activities, and inhibitory effects on α-glucosidase of frac- tionated TFPPs （TFPP-0, TFPP-20, TFPP-40, and TFPP-60） were investigated. We found that the TFPPs were all acid protein-bound heteropolysaccharides, although with different chemical compositions. They had not only re- markable scavenging activity on 2,2＇-azinobis（3-ethylbenzothiazoline-6-sulfonic acid） diammonium salt （ABTS） and reducing activity, but also excellent inhibitory potential against α-glucosidase in vitro. Our results suggest that tea fruit peel could be treated as a potential bioresource for the development of polysaccharide antioxidants.

Characterization of Potential Cellulose from Hylocereus Polyrhizus(Dragon Fruit)peel:A Study on Physicochemical and Thermal Properties

The strict environmental regulations to overcome the drawbacks of consumption and disposal of non-renewable synthetic materials have motivated this investigation.The physical,chemical,morphological,and thermal properties of Hylocereus Polyrhizus peel(HPP)powder obtained from the raw materials were examined in this study.The physical properties analyzes of Hylocereus Polyrhizus peel(HPP)powder discovered that the moisture content,density,and water holding capacity were 9.70%,0.45 g/cm^(3),and 98.60%,respectively.Meanwhile,the chemical composition analysis of Hylocereus Polyrhizus peel(HPP)powder revealed that the powder was significantly high in cellulose contents(34.35%)from other bio-peel wastes.The crystallinity index of Hylocereus Polyrhizus peel(HPP)powder was 32.76%,according to further X-ray diffraction(XRD)analysis.The thermal stability of Hylocereus Polyrhizus peel(HPP)powder was examined using thermogravimetric analysis(TGA)and found thermally stable at 204℃.The morphological study via scanning electron microscopy(SEM)showed a shriveled and irregular geometry surface.Hylocereus Polyrhizus peel(HPP)powder demonstrated the peak in the range representing the major functional groups responsible for pectin’s properties.Thus,the findings revealed that the Hylocereus Polyrhizus peel(HPP)powder has the potential for the development of biodegradable and renewable materials.

Effect of Pre-Harvest Application of Gibberellic Acid on Fruit Quality and Shelf Life of Mandarin (Citrus reticulata Blanco)

Mandarin (Citrus reticulata Blanco) is a promising fruit crop gaining popularity for its human nutrition and economic importance in Nepal. The qualitative losses during pre-harvest stage hinder the productivity and subsequently shorten the on-tree storability. An experiment was conducted to assess the effect of gibberellic acid on quality and shelf life of the mandarin fruit. GA3 at 10, 20, and 30 ppm as against of control were evaluated. Observations on fruit weight (g), fruit firmness (kg/cm2), rind colour (1 - 5 index), juice recovery (%), TSS/acid ratio, PLW (%), decay loss (%), and ascorbic acid (mg/100 ml) were recorded at three harvesting dates i.e. 20 Nov, 5 Dec, and 20 Dec and storage condition. It has been revealed that the fruits treated with GA3 at 20 ppm retained higher fruit weight (128.6 g), more firmness (3.54 kg/cm2), better juice recovery (57.75%), and greater TSS/acid ratio (21.24) at the end of study (20 December). The PLW was found less with GA3 at 30 ppm in both ambient (5.17%) and cellar (6.69%) condition as against untreated fruits (9.52% and 11.76%). Similarly, the decay loss was minimum in the fruits treated with GA3 at 30 ppm both with ambient (1.02%) and cellar condition (8.21%) as against control with ambient (5.54%) and cellar (21.58%).

Determination of the Antioxidant Potentials of Two Different Varieties of Banana Peels in Two Different Solvents

Fruit wastes which are perishable pose a big problem to pollution monitoring agencies;however these problems can be reduced by utilizing the high value compounds present in the food waste. Banana peels contain a reasonable number of antioxidant compounds such as gallocatechin and dopamine. This paper investigates the anti-oxidant potential of two different varieties of Banana peels (Dwarf cavandish and Musa omini). The peels were extracted with two different solvents (Methanol and Ethanol) using the soxhlet extractor. The results show that ethanolic extracts have higher phenolics and flavonoid contents (336.83 - 383.83 mgGAE/100g, 242.83 - 252.82 mgRutin/100g) compared to the methanolic extracts of the same banana varieties (299.42 - 344 mgGAE/100g, 240.77 - 241.23 mgRutin/100g). However methanolic extracts exhibit higher DPPH Antioxidants Activity (30.82% - 51.66%) compared to ethanolic extracts (25.44% - 30.27%). This implies that antioxidative compounds other than phenolics and flavonoids were also involved in inhibiting the DPPH Radicals. It was also observed that at any concentration between 0.5 - 2.5 mg, ethanol extracts of both dwarf cavandish and musa omini had higher reducing power than the other two varieties.

响应面法优化石榴皮百香果果皮复合饮料发酵工艺及抗疲劳功能评价

本研究以石榴皮和百香果果皮为原料,进行石榴皮及百香果果皮(Pomegranate and passion fruit peel,PPFP)复合发酵饮料的研制,通过单因素及响应面试验优化复合饮料发酵工艺条件,并探讨其对小鼠运动耐力的影响。结果表明:复合饮料最佳发酵工艺条件为:石榴皮汁添加量20%、百香果果皮汁添加量24%、发酵时间36 h、发酵温度40℃,感官评分为(94.05±1.85)分,活菌数为(8.5±0.2)lg(CFU/g),在此发酵工艺条件下研制的复合饮料色泽均一,具有石榴皮混合发酵后的独特风味,酸甜适口,无明显分层现象。小鼠试验结果表明:与空白对照组相比,低、中、高剂量组可显著延长小鼠负重力竭游泳时间,小鼠肝糖原和肌糖原储备显著增加,显著降低小鼠血清中乳酸和尿素氮含量(P<0.05)。说明PPFP复合发酵饮料有利于提高小鼠机体运动耐力。

甘草柑橘皮果醋发酵工艺研究

以柑橘皮为主料,甘草为辅料,采用液态发酵法制备甘草柑橘皮果醋。先以总黄酮含量为指标,在单因素试验的基础上通过响应面法优化酒精液制备工艺;再在最佳酒精液制备条件下,以总酸含量和感官评分为指标,通过响应面法优化果醋制备工艺,并对其理化及微生物指标进行分析。结果表明:酒精液最佳工艺参数为酵母菌接种量0.5%(以原料液体积为基准)、原料液糖度16%、发酵时间9 d,在此条件下果醋总黄酮含量为5.37%。最佳果醋制备参数为醋酸菌接种量2.0%(以酒精液体积为基准)、发酵温度35℃、初始乙醇体积分数8.5%、发酵时间9 d,在此条件下果醋总酸含量为5.61 g/100 mL,感官评分为8.74,微生物指标符合相关标准要求。

基于生物网络对柑橘属植物果皮预防高尿酸血症的研究

初步阐明柑橘属植物果皮预防高尿酸血症的药效物质基础与作用机制。通过体外测定柑橘属植物果皮对黄嘌呤氧化酶的抑制作用,评价其预防高尿酸血症的效果,通过网络药理学预测柑橘属植物果皮预防高尿酸血症的物质基础及其潜在作用机制,通过分子对接以验证结果。柑橘属植物果皮对黄嘌呤氧化酶有一定的抑制作用,且在线性范围内呈现量效关系。网络药理学和分子对接技术预测结果显示,柚皮素和桔皮素为主要活性成分,可能通过脂质代谢、血管功能等途径抑制高尿酸血症。芸香科柑橘属植物果皮可应用于大健康产业,用于预防高尿酸血症。

火龙果果皮天然色素提取及羊绒纤维染色

从火龙果果皮中提取天然色素并对羊绒纤维进行染色,通过调整火龙果果皮天然色素用量、染色温度、染色时间、染液pH、媒染剂用量与媒染方法等进行工艺优化。结果表明,当火龙果果皮天然色素体积分数为8%,染色温度55℃,染色时间40 min,染液pH为5,采用2%(omf)硫酸铝为媒染剂的后媒染法染色,羊绒纤维上染率最高。染色羊绒纤维颜色接近火龙果紫红色色光,上染率在75%以上,耐皂洗色牢度达到4级,纤维机械性能符合可纺性要求。

不同青贮时间、水分和添加剂对百香果果皮发酵品质的影响

研究旨在探讨不同青贮时间、水分和添加剂对百香果果皮发酵品质的影响。研究分两个试验进行,试验一:取48个聚乙烯青贮袋,分别装入100 g切碎的百香果果皮混匀后真空密封发酵,然后于发酵第1、3、7、14、21、28、42、56天各开袋6袋,比较营养成分和发酵品质的变化。试验二设定不同水分含量(75%组和85%组)与添加剂(T1为对照组、T2为1/1000 g乳酸菌组和T3为3 mL糖蜜组),以试验一相同方法制备6个青贮发酵处理组,每个处理3个重复,发酵60 d后,分析发酵品质,再用瘤胃体外模拟方法对上述样品进行培养,分析干物质消化率和瘤胃液发酵参数。结果表明:随着发酵时间延长,pH逐渐下降,并在21天时基本达到稳定,乳酸含量逐渐升高,在56天时达到最高。85%组的青贮百香果果皮pH显著低于75%组;两个水分条件下,各处理组乳酸含量均呈现T2>T1>T3(P<0.05)。经体外培养后,尽管75%水分条件下的青贮百香果果皮的干物质消化率显著偏高(P<0.05),但影响程度较小,水分和添加剂不影响瘤胃液发酵参数。综上,百香果皮营养价值较高,易制备青贮,且发酵品质在42 d左右趋于稳定。在85%水分含量下,适当添加乳酸菌后,青贮百香果果皮表现了更加优异的发酵特性和干物质消化率,可以更大发挥其饲料价值。

百香果皮细胞壁多糖的顺序提取与理化性质分析

本文采用水、反式-1,2-环己二胺四乙酸(CDTA)、Na_(2)CO_(3)和不同浓度的NaOH溶剂从百香果皮中依次提取出5种细胞壁多糖,并分析其组成、结构和物理特性。结果表明,水提取多糖得率最高,占果皮醇不溶物干重的9.04%。其次为4mol/LNaOH提取多糖(8.15%)、 0.05mol/LCDTA提取多糖(7.38%)、 0.05mol/L Na_(2)CO_(3)提取多糖(5.36%)和1 mol/L NaOH提取多糖(3.89%)。水提取多糖和0.05 mol/L CDTA提取多糖为以同型半乳糖醛酸聚糖为主的果胶类多糖,其分子量分别为198.46 kDa和73.67 kDa。而0.05 mol/L Na_(2)CO_(3)提取多糖具有高的鼠李半乳糖醛酸聚糖占比(53.47%)和最低的分子量(30.29 kDa)。1 mol/L NaOH提取多糖和4 mol/L NaOH提取多糖属于木糖、葡萄糖、甘露糖和半乳糖等组成的半纤维素类多糖。五种多糖溶液均呈现出剪切稀化特征,其中0.05 mol/L Na_(2)CO_(3)提取多糖表现出最高的表观粘度,并呈现弹性行为,其弹性模量G′大于粘性模量G″。水提取多糖和0.05 mol/L CDTA提取多糖分别在角频率1.10和0.43 rad/s附近出现凝胶向溶胶的转变。此外,0.05 mol/L Na_(2)CO_(3)提取多糖展现出卓越的乳化能力和稳定性。半纤维素类多糖具有较低的粘度和更高的热稳定性。综上,百香果皮含有丰富的细胞壁多糖,且不同多糖在制备乳液和改善食品质构方面展示出不同的潜力。该研究为深度提取和开发果皮多糖提供参考。

27份新疆苹果种质资源果实多酚组分及其含量分析

利用超高效液相色谱法及质谱联用技术,对来源于新疆的27份苹果种质资源果皮、果肉多酚组成及其含量进行测定,并进行聚类分析。结果表明,除石路边3外,26份苹果种质资源果皮总酚含量均高于果肉。在果皮和果肉中均检测到5类多酚,但果皮与果肉的多酚类组分数量不同,果皮为15种组分,果肉为14种组分,芦丁未在果肉中检测到。果皮多酚组分主要为表儿茶素和根皮苷,果肉多酚组分主要为表儿茶素和绿原酸。地方品种多酚含量特异性不强,野生种质资源多样性丰富。聚类分析结果表明:所有供试地方品种和4份野生种质资源聚为1类,其余野生种质资源聚为4类。筛选总酚含量最高的3024为优异种质资源。研究结果为新疆苹果种质资源遗传背景研究提供理论依据,为果实多酚利用和高多酚苹果品种培育提供基础材料。

宁夏枸杞果实性状和预处理对果实制干的影响

【目的】探究不同品种(系)宁夏枸杞果实性状和预处理对果实制干的影响,为枸杞制干工艺提供有价值的理论依据。【方法】以制干差异较大的不同品种(系)宁夏枸杞为试验材料,采用称重法、石蜡切片和扫描电镜等方法,对果实加工性状、果皮及角质层结构、果皮蜡质微形态和不同预处理枸杞果实制干时间进行探究,明确不同品种(系)宁夏枸杞果实性状和预处理对果实制干的影响。【结果】1)不同品种(系)枸杞果实纵径、百粒质量、单果体积存在显著差异,‘16-23-7-8’横径、纵径、百粒质量、单果体积均最高,‘宁杞1号’最低。2)随着果实发育,果皮和角质层厚度逐渐增加且存在显著差异。‘宁杞5号’果皮厚度最大,达768.273μm;‘宁杞1号’果皮厚度最小,为445.100μm。‘14-402’角质层最厚,达9.420μm;‘16-23-7-8’最低,为7.528μm。3)成熟期枸杞果实表皮被束状蜡质层覆盖,蜡质晶体呈无规则片状,片状蜡质层较厚,排列较紧密。4)不同品种(系)枸杞果实制干时间存在显著差异,由易到难依次为‘宁杞1号’、‘Z44’、‘16-23-7-8’、‘14-402’、‘宁杞5号’。与对照相比,碱处理后,平均制干时间缩短4.10 h;氯仿处理后,平均制干时间缩短16.94 h。【结论】枸杞果皮结构通过影响水分运输进而影响枸杞果实制干过程;预处理可破坏枸杞表皮蜡质层缩短制干时间。本研究5个枸杞品种(系)中,‘宁杞5号’不易制干,‘宁杞1号’最易制干,在枸杞制干时,应用的预处理方式必须考虑品种间存在的组织和形态解剖学特征的差异。

不同比例百香果皮对发酵型全混合日粮品质和干物质消化率的影响

试验旨在探究不同比例百香果皮对发酵全混合日粮(FTMR)发酵品质和干物质消化率的影响。试验设定FTMR粗精比为7∶3,粗蛋白含量理论值为13%。各处理组百香果皮分别替代0(对照组,T0)、5%(T1)、10%(T2)和15%(T3)的王草。密封发酵60 d,使用体外瘤胃液培养方法测定干物质消化率及瘤胃发酵参数。结果表明:各处理组pH值、乙酸含量和氨态氮/总氮无显著差异(P>0.05),添加5%、10%和15%百香果皮的FTMR的乳酸含量均显著升高(P<0.05)。经6 h体外培养后,各组瘤胃液pH值在6.970~6.997之间(P>0.05)。当百香果皮添加量达到15%(T3)时,瘤胃产气量和干物质消化率均达到最高。研究表明,百香果皮可以作为发酵全日粮中的优质原料,具有促进发酵和提升干物质消化率的效果,添加量最高可达15%。

乙烯和1-甲基环丙烯对椪柑采后浮皮及白皮层细胞壁代谢的影响

【目的】浮皮是宽皮柑橘Citrus reticulata果实在成熟后期或采后储藏过程中普遍发生的一种生理性障碍。椪柑C.reticulata‘Ponkan’在采后储藏中极易发生浮皮,严重影响商品价值。通过采后处理,为椪柑果实采后浮皮的防范、储藏保鲜技术提供理论依据。【方法】利用乙烯和1-甲基环丙烯(1-MCP)处理椪柑采后果实,测定椪柑在储藏期间果实主要品质指标及浮皮指数的变化,分析果皮白皮层细胞形态和生理变化特征。【结果】①乙烯处理促进了储藏期果实可溶性固形物质量分数的提高;加速了果皮白皮层细胞密度、纤维素质量分数、果胶质量分数的下降,促使木质素质量分数及细胞壁降解酶(纤维素酶、果胶酯酶、多聚半乳糖醛酸酶)活性上升。②1-MCP处理减缓了果皮白皮层细胞密度及纤维素质量分数下降;延缓了木质素质量分数及细胞壁降解酶(纤维素酶、果胶酯酶、多聚半乳糖醛酸酶)活性上升;减缓了椪柑果实浮皮指数的上升。【结论】乙烯处理可加速椪柑果实采后生理代谢水平,加重果实浮皮的发生。1-MCP处理可抑制储藏期果皮的生理代谢水平,减轻浮皮障碍的发生。生产中可通过乙烯和1-MCP处理来控制椪柑果实剥皮的难易程度。