Anthocyanin profi les and color properties of red wines made from Vitis davidii and Vitis vinifera grapes

Spine grape(Vitis davidii Foex.)is an important wild grape species native to China.Fifteen red spine grape clones and three red Vitis vinifera grape varieties were used to evaluate the differences in the anthocyanin profiles and color properties of wines made from V.davidii and V.vinifera grapes.Among spine wines,‘Junzi#2’wine had the highest total phenolic and total anthocyanin,‘Xiangzhenzhu’wine had the highest total flavonoids,and‘Junzi#1’wine had the highest total tannin.The anthocyanin compositions of all of the spine wines were dominated by Mv-3,5-diglucoside.The total individual anthocyanin contents in spine wines,except‘Gaoshan#5’,‘Junzi#5055’,‘Junzi#5061’,and‘Junzi#5044’,were signifi cantly higher than in V.vinifera wines.Most of the spine wines had a stronger red intensity and a brighter chroma with a bluer hue than V.vinifera wines.Correlation analysis revealed that the color properties were closely related to the anthocyanin composition.These results suggest that wines made from spine grapes may be useful for the wine industry for their color properties and high individual anthocyanin contents.

Effects of mesoclimate and microclimate variations mediated by high altitude and row orientation on sucrose metabolism and anthocyanin synthesis in grape berries

Climate change and extreme weather pose significant challenges to the traditional viticulture regions.Emerging high-altitude grape-producing regions with diverse orientations have shown great potential in coping with this challenge.Stable,high-quality wine grape production may be achieved by synchronizing the meso-and microclimate.To clarify the role of high altitude and row orientation in meso-and microclimate and the response of berries to it,we evaluated seven years(2012-2018)of climate data,two years of basic grape(Cabernet Sauvignon,Vitis vinifera L.)quality,and one-year microclimate from veraison to harvest.By comparing two locations(Sidon 2047 m,Sinon 2208 m)in Yunnan Province,China,we found that the average temperature has been stable at approximately 15℃ for seven years,with no extreme weather or,noticeable global warming.The light intensity(LI)in the north-south(NS)was more balanced than the east-west(EW)direction,and the east-west to the south(EW-S)canopy side was almost higher than the other sides.High LI was associated with high photosynthetically active radiation(PAR),ultraviolet(UV),and infrared(IR)light and vice versa.The north-south to the east(NS-E)and east-west to the north(EWN)sides were characterized by lower LI and higher UV and IR light,and higher total anthocyanin content.Most anthocyanin synthesis-related genes,for example,VvF3'H and VvF3'5'H,were highly expressed in NS-E from veraison to maturity.Perhaps UV and IR light induced their expression.This study provides new insights on the role of differently orientated rows in controlling grape quality due to varied light quality.The findings are globally significant,particularly in the context of climate change,and offer fresh insights into berry physiological responses and decision-making for the management of existing vineyards.

三种多酚类物质协同L-精氨酸对冷藏鸡肉糜氧化稳定性和品质的影响

为探讨苹果多酚(Apple polyphenols,Ap)、葡萄籽提取物(Grape seed extraction,GSE)和茶多酚(Tea polyphenols,Tp)分别协同L-精氨酸(L-arginine,L-Arg)对冷藏鸡肉糜氧化稳定性和品质特性的影响,在肉糜中添加5 g/kg L-Arg,再分别加入0.2 g/kg的Ap、GSE、Tp,以添加0.2 g/kg丁基羟基茴香醚(Butylated hydroxy anisole,BHA)作为阳性对照,分别在冷藏1、3、5、7 d时测定各组鸡肉糜硫代巴比妥酸(Thiobarbituric acid reactive substances,TBARS)值、总巯基含量、羰基含量、表面疏水性、pH、蒸煮损失率和色度值。结果表明,与空白(不添加多酚类物质、L-精氨酸及BHA)和BHA相比,L-Arg+Tp可以更好地抑制鸡肉糜的TBARS、羰基含量、pH和表面疏水性的升高,减缓总巯基含量和红度值的降低。L-Arg+Ap和L-Arg+GSE与BHA的抗氧化作用相近。综上所述,在冷藏过程中L-Arg协同3种多酚类物质均可以抑制鸡肉糜的脂肪和蛋白质氧化,改善其品质特性,其中L-Arg+Tp的效果最好。

196份葡萄属(Vitis L.)种质资源耐热性评价

以国家果树种质郑州葡萄圃保存的196份代表性葡萄属种质为试材,利用叶绿素荧光参数法对其耐热性进行了鉴定评价。结果表明:196份葡萄属植物的耐热性叶绿素荧光参数Fv/Fm数值在0.0792~0.6836之间,品种间抗性存在差异,耐热性服从正态分布,表现为多基因控制的数量性状。利用有序样品最优分割聚类法,将其耐热性分为弱、中、强3种类型,叶绿素荧光参数分级阈值分别对应≤0.3、(0.3,0.5]、>0.5,利用该分级标准筛选出了腺枝葡萄双溪03、刺葡萄梅岭山1301、菱叶葡萄0945和和田绿葡萄等48份耐热性强的葡萄种质,起源于我国的野生葡萄耐热性整体上高于其他类群或品种。研究结果对于利用抗性亲本选育耐热葡萄新品种和葡萄抗热机理研究具有参考意义。

葡萄属植物(Vitis L.)再生系统的研究进展

阐述了葡萄属植物再生系统的研究进展,论述和分析了影响葡萄属植物离体再生的主要因素,包括葡萄基因型、外植体类型、外植体生理状态、培养基类型、植物激素种类及浓度、培养方式、培养条件等,并对其研究现状、存在问题及应用前景作了简要概述。

浙江葡萄属(Vitis L.)植物新资料

该文报道了在浙江葡萄属(Vitis L.)分类研究中的新发现:(1)描述了开化葡萄(V.kaihuaica Z.H.Chen,F.Chen et W.Y.Xie)、秀丽葡萄(V.amoena Z.H.Chen,F.Chen et W.Y.Xie)2新种和腺枝龙泉葡萄(V.longquanensis var.glandulosa Z.H.Chen,F.Chen et W.Y.Xie)1新变种;(2)将V.adenoclada Hand.-Mazz.作为毛葡萄(V.heyneana Roem.et Schult.)的变种处理,即腺枝毛葡萄[V.heyneana Roem.et Schult.var.adenoclada(Hand.-Mazz.)Z.H.Chen,F.Chen et W.Y.Xie];(3)报道了蓝果刺葡萄[V.davidii(Roman.Du Caill.)Foex var.cyanocarpa(Gagnep.)Sarg.]在浙江的分布新记录。

葡萄(Vitis vinifera L.)试管繁殖中芽增殖能力衰减的原因及其防治方法的研究

以20个葡萄品种试管苗作为实验材料,经四年、四十多代的继代培养反复对比实验发现:在葡萄试管繁殖中,连续恒温(25±1℃)条件下培养或只采用固体培养方法,不适期进行继代培养均会导致芽增殖能力的衰减,根据生物统计分析,当继代培养超过16～17代后,芽增殖能力即随着继代培养次数的增加而逐渐下降,采取变温培养、变换培养方法、适期继代培养或在增殖培养基中附加适量的椰子乳汁等方法均可防治芽增殖能力的哀减,保持高的芽增殖能力。

葡萄(Vitis Vinifera L.)X-射线能谱元素微区污染分析研究

对葡萄果实不同处理的细胞组织多位点进行X -射线能谱微区元素分析。结果 :葡萄不同处理的细胞组织中共发现Mg、Al、Si、P、S、Cl、K、Ca、Fe、Cu十种元素。且不同处理的组织细胞中各元素含量分布有差异 ,未清洗果实表皮处理的Al、Si、S、Ca、Cu含量均显著高于对照 。

VitisMod:一个葡萄基因共表达数据库

葡萄转录组已在各种组织、发育阶段、生物胁迫、非生物胁迫和其他条件下被测定。目前,仍没有简单实用的网络工具来探索这些宝贵的数据。本文从美国国立生物技术信息中心的基因表达数据库(NCBI GEO)下载1019个基因表达芯片数据,进行权重基因共表达网络分析(WGCNA)。鉴定到41个基因共表达模块。功能富集分析发现这些模块具有不同的功能,并与实验/表型相关。通过模块内连接度筛选枢纽基因,这些基因可能具有重要功能。通过关联推定(Guilt-by-association)原理对模块内功能未知的基因进行功能预测。最后,构建了免费的网络工具VitisMod,为葡萄的基因功能研究提供新资源,网址为:http://bioinformatics.fafu.edu.cn/grape。

The potential role of grape (Vitis vinifera L.) in prevention of threatened abortion via immunomodulatory and anti-inflammatory abilities: a hypothesis

Threatened abortion is a common problem in early pregnancy. This early vaginal bleeding happens in about 25% of pregnant women. The medications including progesterone, uterine muscle relaxant or human chorionic gonadotropin have essential effects in developing pregnancy, but the clinical data are insufficient to prescribe them. In recent decades, medicinal herbs can help us to present new treatments. Grape (Vitis vinifera L.) can protect the fetus from the perspective of Persian medicine. So, we hypothesize about the salutary effects of grape in miscarriage prevention. We found five standard expected mechanisms of grape to prevent threatened abortion: immunomodulatory and anti-inflammatory, anti-oxidant, anti-contraction, hormonal and anti-stress activities. Grape reduces nitric oxide, prostaglandin E2, expression of nuclear factor κB and other pro-inflammatory cytokines like IL (Interleukin)-1β, IL-6, IL-8, and tumor necrosis factor-α. It also elevates anti-inflammatory mediators and expression of peroxisome proliferator-activated receptor-γ. Grape polyphenols have a crucial role in fetus protection with high antioxidant power and other functions such as prevention of stress-triggered abortion with proanthocyanidins, or hormonal effects and inhibition of uterine contractions with resveratrol. So according to these studies, grape probably has effects on the immune and endocrine factors involved in threatened miscarriage.

The Establishment of an Agrobacterium-Mediated Transformation Platform for the Non-Embryogenic Calli of Vitis vinifera L.

Non-embryogenic calli （NEC） was inevitably and heavily produced when grape embryogenic calli （EC） was induced from explants or during the subculture of EC.A stable and highly efficient NEC transformation platform is required to further sort out and verify key genes which determine/switch the identity of NEC and EC.In this research,a vector pA5 containing a chitinase signal sequence fused to gfp （green fluorescent protein） and an HDEL motive was used to target and immobilize into Agrobacterium strain EHA105 to establish a transformation platform for Vitis vinifera L.cv.Chardonnay NEC.It was determined that NEC 10 d after subculture was the best target tissue;30 min for inoculation followed by 3 d co-cultivation with the addition of 200 μmol L-1 acetosyringone （AS） was optimized as protocol.The use of bacterial densities as 1.0 at OD600 did not result in serious tissue hypersensitive reaction and it had higher efficiency.Kanamycin at 200 mg L-1 was picked for positive expression selection.The stable transformation of NEC was proved by reverse transcription-polymerase chain reaction techniques （RT-PCR） and fluorescent microscopy after three sub-cultures of the selected cell line.Highly efficient genetic transformation protocol of grape NEC was achieved and some of the optimized parameters were different from that reported for EC.This transformation platform could facilitate the verification of candidate somatic embryogenesis （SE） decisive genes,and the successfully transformed NEC with certain genes can also be used as bioreactors for the production of functional products,as NEC not only proliferates fast,but also keeps in a rather stable condition.

Somatic embryogenesis and histological analysis from zygotic embryos in Vitis vinifera L.‘Moldova’

We examined the somatic embryogenesis from and histological studies of zygotic embryos of seeds in European Grape ＇Moldova＇ （Vitis vinifera U ＇Moldova＇）. Primary calli were initiated on Nitsch and Nitsch （NN） medium supplemented with 1.0 mg·L^-1 2,4-D and 0.5 mg·L^-1 6-BA. Embryogenic calli were produced upon transfer to a NN medium with 0.5 mg·L^-1 6-BA and 2 mg·L^-1 NAA and somatic embryos were obtained on a half strength MS medium without plant growth regulators. During the somatic embryo germination, an addition of 1.0 mg·L^-1 6-BA in the medium could accelerate somatic embryos to develop into normal plants and increase the conversion rate from 0 to 43.3%. Histological studies of embryogenic calli and somatic embryos demonstrated dynamic changes of proteins and starch grains. The developmental processes of somatic embryos were similar to those of zygotic embryos, including typical epiderma, cotyledon primordium and vascular tissue.

A novel glycoside hydrolase 74 xyloglucanase CvGH74A is a virulence factor in Coniella vitis

Grape white rot is a destructive fungal disease occurring worldwide.Recently,Coniella vitis was identified as the predominant pathogen causing this disease in China.As the periderms of grape shoots are severely degraded by C.vitis,it was speculated that cell wall-degrading enzymes(CWDEs)might play a key role in the pathogenesis of this disease.Therefore,this study aimed to examine the hydrolytic activity of the CWDEs of C.vitis.The results showed that xylanase(Xy)and xyloglucanase(XEG)had high levels of hydrolytic activity both in vitro and in vivo.Furthermore,a high-virulence fungal strain exhibited higher levels of Xy and XEG activities compared with a low-virulence strain.The genome of the fungus was found to harbor two XEG-coding genes CvGH74A and CvGH74B,which belonged to the glycoside hydrolase(GH)74 family.The expression level of CvGH74A was found to be high during pathogen infection.CvGH74A gene deletion mutants were generated using the split-marker method.The deletion of CvGH74A decreased both the hydrolytic activities of XEG and Xy and also the ability of the fungus to infect the grape leaves.No differences in the hyphal growth,morphology of colonies,or conidiation were found between theΔCvGH74A mutant strains and the wild-type strain.Together,these results suggested that CvGH74A acted as an important virulence factor,and its enzymatic activity might regulate the virulence of the pathogen.This study was novel in reporting that GH74 XEG acted as a virulence factor in C.vitis.

Not All Shrivels Are Created Equal—Morpho-Anatomical and Compositional Characteristics Differ among Different Shrivel Types That Develop during Ripening of Grape (<i>Vitis vinifera</i>L.) Berries

An understanding of physiological disorders associated with ripening of fruits triggered by abiotic stress relies on anatomical and physico-chemical analyses, as it provide insights into their origin and probable causes. The objective of this study was to analyze different ripening disorders of grape (Vitis vinifera L.) berries by dissecting their morpho-anatomy, shriveling nature, and composition. Four well-defined disorders—sunburn, prolonged dehydration (PD), late-season bunch stem necrosis (LBSN), and berry shrivel (BS) were analyzed in field-grown grapevines of the cultivar Cabernet Sauvignon. Early bunch stem necrosis (EBSN) that occurred before ripening was also included in the study. Unlike healthy spherical berries, the pericarp of disordered berries except for sunburn shriveled causing concomitant reductions in fresh weight and volume. The exocarp of PD berries developed well-ordered indentations as distinct from the wrinkles in LBSN berries, whereas BS berries were flaccid with numerous skin folds. The epicuticular wax occurred as upright platelets in all shrivel forms excluding the sun-exposed hemisphere of sunburned berries. A chlorophyllous inflorescence framework persisted in all shrivel forms but in LBSN, wherein the necrotic regions developed tylosis. Unlike the translucent mesocarp of healthy, sunburned, and PD berries, the mesocarp was collapsed in BS and LBSN berries, nevertheless all had well-developed seeds. The composition of healthy berries was optimal, whereas the disordered berries were compositionally distinct from each other, which as a whole differed from the healthy berries. The BS berries had the lowest sugar content, and although sugar concentration was higher in LBSN, sunburned and PD berries, sugar amount per berry was highest in the healthy berries, the same was true for hexoses. Healthy and BS berries exhibited highest amounts of tartaric acid followed by sunburn and PD berries, whereas the LBSN berries had the lowest values. Conversely, healthy and PD berries had the highest amounts of malic acid followed by LBSN, sunburn and BS berries, which collectively displayed similar amounts. The PD berries exhibited the highest calcium content followed by LBSN, healthy, and finally BS and sunburned berries. A linear relationship existed between potassium (K) and pH of the berries. The PD berries had the highest amounts of K followed by healthy, sunburn, LBSN, and BS berries. Overall, the results reported here provided combined morpho-anatomical and compositional analyses of different shrivel types that occurred during a single growing season. Such analysis is needed to make a progress on understanding these ripening disorders culminating in the development of remedial measures.

Bioactive compounds of red grapes from Dao region(Portugal):Evaluation of phenolic and organic profile

Objective:To improve the knowledge on the metabolite profile of five red grapes from D?o region(Portugal),concerning to the phenolic characteristics(coloured and non-coloured phenolics) and organic acid composition.Methods:Five red grapes collected from D?o region were studied.The profiles of phenolic compounds and organic acids were estimated by high-performance liquid chromatography with diode-array detection and high-performance liquid chromatography with UV detector,respectively.Results:Totally 24 phenolic compounds were identified,and distributed by several classes:8 anthocyanins,1 hydroxybenzoic acid,4 hydroxycinnamic acids,1 stilbene,4flavan-3-ols,6 flavonols.Additionally,10 organic acids were detected in all samples.Total contents of each phenolic class and organic acids amounts varied significantly among the different grape cultivars investigated.The principal components analysis differentiates the Touriga Nacional from the other varieties due to their high contents in anthocyanins,non-coloured phenolics and organic acids.Touriga Nacional is an important red grape cultivar,highly esteemed in D?o region for its ability to produce high quality wines.Conclusions:The results suggest that the red grapes from D?o region present a good composition in bioactive compounds,being important for the production of wines with superior quality.

The Effect of Sample Date and Timing of Cuttings for Maximum Propagation Efficiency of the Grape, <i>Vitis aestivalis</i>“Norton/Cynthiana”

Vitis aestivalis “Norton/Cynthiana” is a grape native to North America and utilized in the commercial wine industry. The purpose of this research was to determine the appropriate time of year and/or time after last freeze that will yield the most successful propagation rate for Vitis aestivalis. It was hypothesized that the highest rate of propagation would be in early summer. During a year-long study (2015-2016), forty cuttings were taken semi-monthly from a vineyard, treated with 0.1% IBA and placed in a plant growth room set to spring conditions. Daily temperatures were recorded every day as well. In a follow-up study, cuttings were taken weekly from early spring before vine budding until late fall (2017) and treated as previous. After six weeks, cuttings were evaluated for root production. In both studies, rooting success rates were the highest in the month of June at 10.0% - 27.5%, with rates less than 7.5% for all other sampling dates. It was determined that the best time to propagate Vitis aestivalis is in June, 10 - 12 weeks after the last temperature below 0°C or eight to ten weeks after the first budding.

Rooting Abilities in <i>Vitis vinifera</i>L.: Total Lipid and Fatty Acids Evolution in Perle Noir Cutting

Rooting ability in Vitis vinifera L. is the phenomena studied. The evolution of the total lipids contents and fatty acids amount of cuttings during the rooting were determined. Total lipid extraction was carried out by an extraction solvent consisting of a mixture of chloroform and methanol. Methylation of fatty acids was carried out by the boron trifluoride methanol complex. Their analysis is performed by gas chromatography. We have obtained a content of merithallus lipids equivalent with then in bibliography. In other hand 3 fatty acids were obtained: eicosapentaenoic acid, oleic acid and docosanoic acid. Among the studied of rooting abilities, we observed decreased levels of total lipids and in the essential fatty acids: eicosapentaenoic acid C20:5 n-3 and oleic acid C18:1 n-9. Minor fatty acids cuttings experimental have a variable evolution. Lipids and certain fatty acids may be markers of rooting in the vine.

Evolution of the Maturation Point of Wine Grapes Intended for Juice Processing

Rainy years especially in the ripening period end up weakening grape quality, thus making it unsatisfactory for winemaking. The possibility of using wine grape varieties in the preparation of juices presents an alternative to the grapes that do not reach ideal harvest for winemaking. Assuming that the preparation of juice from wine grapes can be an alternative to these grapes which in harvests are considered poor for winemaking and can be harvested in advance, thus preventing losses from late cycle disease and excessive spending on phytosanitary treatments, the present study aimed to evaluate the juices made from “Cabernet Sauvignon”，“Merlot” and “Chardonnay” grapes harvested at different points of maturation, and subsequently compare with current legislation. Physicochemical analysis of titratable acidity (TA), soluble solids (SS), relative density, total sugar, alcohol, volatile acidity and SS/TA ratio was carried out on the juices produced at three sampling points (15, 17 and 19 °Brix). The results showed variability between treatment factors (cultivars and points of maturation). Analyses of titratable acidity, soluble solids, SS/TA ratio, relative density, total sugars and volatile acidity showed significance for the interaction between the tested treatment factors. For the variable alcohol, there was no significance for the effect of variety, maturation stage or the interaction between the factors of treatment. It was concluded that Cabernet Sauvignon juice met the parameters set by law at 17 °Brix, while Chardonnay and Merlot juices showed consistent results only at harvest point 19 °Brix.

不同初始场条件对GRAPES模式数值预报的影响

利用中国新一代数值预报模式GRAPES(Global/Regional Assimilation and Prediction Enhanced System),分别使用T213 L31及NCEP FNL 6 h间隔的资料作为初始和边界条件,对2005年7月9—10日淮河流域一次致洪暴雨过程进行了个例试验,初步探讨了GRAPES模式的数值预报产品对不同初始场的敏感程度,以及三维变分同化对数值预报结果的可能影响。结果表明,T213和NCEP初始场中存在着差异较大的次天气尺度特征,并由此造成了此后GRAPES模式预报场的差异,且此差异不会随时间消失;同化对GRAPES模式积分结果的影响主要表现在最初的24 h内;模式对此次致洪暴雨过程的暴雨区分布、强度均有一定的模拟能力,但模拟的强暴雨区与实况仍存在着较大差异。由此可知,GRAPES模式的数值预报能力对不同的初始场和侧边界条件存在不同程度的依赖性,初始场的差异决定了模拟结果的差异。