Diversity of epiphytic fungi on the surface of Kyoho grape berries during ripening process in summer and winter at Nanning region, Guangxi, China

2019 ◽  
Vol 123 (4) ◽  
pp. 283-289 ◽  
Author(s):  
Su Ding ◽  
Nan Li ◽  
Muming Cao ◽  
Qiufeng Huang ◽  
Guopin Chen ◽  
...  
Keyword(s):  
Ripening Process ◽  
Grape Berries ◽  
Epiphytic Fungi

scholarly journals Fungicide and Clay Treatments for Control of Powdery Mildew Influence Wine Grape Microflora

HortScience ◽  
2006 ◽  
Vol 41 (1) ◽  
pp. 176-182 ◽  
Author(s):  
Peter Sholberg ◽  
Colleen Harlton ◽  
Julie Boulé ◽  
Paula Haag
Keyword(s):  
Powdery Mildew ◽  
Growing Season ◽  
Management Program ◽  
Detectable Effect ◽  
Wine Grape ◽  
Fruit Tissue ◽  
Grape Berries ◽  
Epiphytic Fungi ◽  
Clay Treatment ◽  
Better Than

There is very little information on the interaction of wine grape microflora with fungicides used to control grape diseases. The objective of this study was to determine how fungicides used in a standard grape pest management program and an experimental clay being developed for control of powdery mildew affect grape microflora. Grape leaves and fruit were surveyed for bacteria, fungi and yeast six times over the growing season in 2000 after treatment with clay or fungicides. In 2001 only clay was studied for control of powdery mildew in `Chancellor' grapes. The total number of propagules present on untreated leaf and fruit tissue were 76% bacteria, 14% yeast, and 9% fungi. Fungicides used for grape disease control significantly reduced epiphytic fungi (P < 0.0001), bacteria (P = 0.03), and yeast (P = 0.0001) on grape berries and epiphytic fungi (P < 0.0001), and yeast (P = 0.03) on leaves. The clay treatment had no detectable effect on grape microflora because no significant differences were recorded between clay or untreated grape berries or leaves on any of the sampling dates. Over the growing season the fungicide spray program reduced incidence and severity of powdery mildew better than clay. Clay controlled powdery mildew on `Chancellor' fruit in 2000 and 2001.

Influence of the farming system on the epiphytic yeasts and yeast-like fungi colonizing grape berries during the ripening process

2014 ◽  
Vol 177 ◽  
pp. 21-28 ◽  
Author(s):  
Guilherme Martins ◽  
Jessica Vallance ◽  
Anne Mercier ◽  
Warren Albertin ◽  
Panagiotis Stamatopoulos ◽  
...  
Keyword(s):  
Farming System ◽  
Ripening Process ◽  
Grape Berries

Effect of abrasive pre‐treatment on drying rate of grape berries and raisin quality

2021 ◽  
Author(s):  
Dilip Ananda Pawar ◽  
Saroj Kumar Giri ◽  
Ajay Kumar Sharma ◽  
Nachiket Kotwaliwale
Keyword(s):  
Drying Rate ◽  
Grape Berries ◽  
Pre Treatment

scholarly journals Characterization and Action Mechanism Analysis of VvmiR156b/c/d-VvSPL9 Module Responding to Multiple-Hormone Signals in the Modulation of Grape Berry Color Formation

Foods ◽  
2021 ◽  
Vol 10 (4) ◽  
pp. 896
Author(s):  
Ziwen Su ◽  
Xicheng Wang ◽  
Xuxian Xuan ◽  
Zilu Sheng ◽  
Haoran Jia ◽  
...  
Keyword(s):  
Color Change ◽  
Grape Berry ◽  
Anthocyanin Synthesis ◽  
Structural Genes ◽  
Expression Levels ◽  
Color Formation ◽  
Grape Berries ◽  
Ripening Stages ◽  
Color Conversion ◽  
Hormone Signals

In recent years, more and more reports have shown that the miR156-SPL module can participate in the regulation of anthocyanin synthesis in plants. However, little is known about how this module responds to hormonal signals manipulating this process in grapes. In this study, exogenous GA, ABA, MeJA, and NAA were used to treat the ‘Wink’ grape berries before color conversion, anthocyanin and other related quality physiological indexes (such as sugar, aroma) were determined, and spatio-temporal expression patterns of related genes were analyzed. The results showed that the expression levels of VvmiR156b/c/d showed a gradually rising trend with the ripening and color formation of grape berries, and the highest expression levels were detected at day 28 after treatment, while the expression level of VvSPL9 exhibited an opposite trend as a whole, which further verifies that VvmiR156b/c/d can negatively regulate VvSPL9. Besides, VvmiR156b/c/d was positively correlated with anthocyanin content and related genes levels, while the expression pattern of VvSPL9 showed a negative correlation. Analysis of promoter cis-elements and GUS staining showed that VvmiR156b/c/d contained a large number of hormone response cis-elements (ABA, GA, SA, MeJA, and NAA) and were involved in hormone regulation. Exogenous ABA and MeJA treatments significantly upregulated the expression levels of VvmiR156b/c/d and anthocyanin structural genes in the early stage of color conversion and made grape berries quickly colored. Interestingly, GA treatment downregulated the expression levels of VvmiR156b/c/d and anthocyanin structural genes in the early color-change period, but significantly upregulated in the middle color-change and ripening stages, therefore GA mainly modulated grape berry coloring in the middle- and late-ripening stages. Furthermore, NAA treatment downregulated the expression levels of VvmiR156b/c/d and anthocyanin structural genes and delayed the peak expression of genes. Meanwhile, to further recognize the potential functions of VvmiR156b/c/d, the mature tomato transient trangenetic system was utilized in this work. Results showed that transient overexpression of VvmiR156b/c/d in tomato promoted fruit coloring and overexpression of VvSPL9 inhibited fruit coloration. Finally, a regulatory network of the VvmiR156b/c/d-VvSPL9 module responsive to hormones modulating anthocyanin synthesis was developed. In conclusion, VvmiR156b/c/d-mediated VvSPL9 participated in the formation of grape color in response to multi-hormone signals.

scholarly journals Interplay between Abscisic Acid and Gibberellins, as Related to Ethylene and Sugars, in Regulating Maturation of Non-Climacteric Fruit

2021 ◽  
Vol 22 (2) ◽  
pp. 669
Author(s):  
Fernando Alferez ◽  
Deived Uilian de Carvalho ◽  
Daniel Boakye
Keyword(s):  
Abscisic Acid ◽  
Molecular Level ◽  
Economic Importance ◽  
Sugar Signaling ◽  
Citrus Species ◽  
Endogenous Factors ◽  
Grape Berries ◽  
Climacteric Fruit ◽  
Agronomic Management ◽  
Management Techniques

In this review, we address the interaction between abscisic acid (ABA) and gibberellins (GAs) in regulating non-climacteric fruit development and maturation at the molecular level. We review the interplay of both plant growth regulators in regulating these processes in several fruit of economic importance such as grape berries, strawberry, and citrus, and show how understanding this interaction has resulted in useful agronomic management techniques. We then relate the interplay of both hormones with ethylene and other endogenous factors, such as sugar signaling. We finally review the growing knowledge related to abscisic acid, gibberellins, and the genus Citrus. We illustrate why this woody genus can be considered as an emerging model plant for understanding hormonal circuits in regulating different processes, as most of the finest work on this matter in recent years has been performed by using different Citrus species.

Improving the ripening process after 1-MCP application: Implications and strategies

2021 ◽  
Author(s):  
Cindy Dias ◽  
Tânia Ribeiro ◽  
Ana Cristina Rodrigues ◽  
António Ferrante ◽  
Marta W. Vasconcelos ◽  
...  
Keyword(s):  
Ripening Process

Salicylic acid and oxalic acid in enhancing the quality and extending the shelf life of grape cv. Thompson seedless

2021 ◽  
pp. 108201322110206
Author(s):  
TK Hazarika ◽  
Tangkasil Marak
Keyword(s):  
Salicylic Acid ◽  
Oxalic Acid ◽  
Shelf Life ◽  
Titratable Acidity ◽  
Ethylene Biosynthesis ◽  
Fungal Decay ◽  
Grape Berries ◽  
Overall Acceptability ◽  
Table Grapes ◽  
Acid Ratio

Postharvest life of table grapes is usually shortened by berry softening, berry drop, stem browning, fungal decay. Salicylic acid reduces fruit respiration and ethylene biosynthesis, during storage of fruits. Similarly, application of oxalic acid is a secure and hopeful postharvest handling technology for keeping quality and prolonging storage life of fruit. To study the effect of Salicylic acid and oxalic acid in enhancing the quality and extending the shelf life of grape, the present investigation was conducted. The grape berries were treated with Oxalic acid (OA) (1, 2, 3, 4, and 5 mM) and Salicylic acid (SA) (0.5, 1, 1.5 and 2 mM). The treatments were compared within 16th days at an interval of 4 days. Among the treatments, SA (2 mM) showed superiority in different quality attributing characters like physiological loss in weight (PLW), berry firmness, rachis browning, berry appearance, fungal decay, berry shattering, TSS, ascorbic acid, titratable acidity, total sugars, reducing sugars, TSS: acid ratio, taste, overall acceptability and shelf life. Hence, SA (2 mM) can be used as an effective strategy for maintaining quality of table grapes.

scholarly journals Insights in genetic diversity of German and Italian grape berry moth (Eupoecilia ambiguella) populations using novel microsatellite markers

2021 ◽  
Vol 11 (1) ◽  
Author(s):  
Annette Reineke ◽  
Alberto Pozzebon ◽  
Olivia Herczynski ◽  
Carlo Duso
Keyword(s):  
Population Genetics ◽  
Microsatellite Markers ◽  
Isolation By Distance ◽  
Resistance Management ◽  
Grape Berry ◽  
Grape Berries ◽  
Eupoecilia Ambiguella ◽  
Significant Damage ◽  
Significant Divergence ◽  
Lepidopteran Pest

AbstractThe grape berry moth Eupoecilia ambiguella (Lepidoptera: Tortricidae) is causing significant damage to grape berries, however, little is known on population genetics of this lepidopteran pest insect, hindered so far by the lack of suitable molecular markers. Here we report on the development of ten microsatellite markers of which six were used to characterise 21 E. ambiguella populations obtained from two viticultural regions in Germany and Italy. Moths were sampled during two subsequent generations (flights) in the same vineyard as well as in vineyards surrounded by different landscape types. German and Italian populations were genetically differentiated and a significant isolation by distance was evident. No significant divergence was observed among the populations from first or second flight moths, however, inbreeding was higher in first than in second flight populations. Moreover, inbreeding was influenced by habitat composition and complexity of landscape around vineyards, being positively associated with the percentage of area covered by grapevine. Population genetics of E. ambiguella could thus be affected by the presence of alternative host plants in viticultural landscapes, which is important in the light of both insecticide resistance management and sustainable pest management.

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