•Hyperspectral image technique was applied for detection of fungal infection in fruits.•The performance of several supervised classification models was compared.•19 wavelengths were significant for ...discrimination of infections in strawberries.•The BNN model gave the best accuracy for discrimination of fungal infected fruits.
Early stages of fungal infections in strawberry fruit are difficult to detect by the majority of commonly used manual and automatic sorting methods In this study, hyperspectral imaging was applied for detection of fungal infections causing fruit spoilage. Fruit of two cultivars: ‘Senga Sengana’ and ‘Honeoye’, were individually inoculated with pathogenic fungi of Botrytis cinerea and Collatotrichum acutatum, while non-inoculated fruit were used as a control. The reflectance spectra of fruit were acquired during four days after inoculation. Based on the second derivative of the original spectra, 19 wavelengths were selected as the most appropriate for discrimination of infections in strawberries and were used to construct supervised classification models. Among all the studied classifiers, the best prediction accuracies for discriminating fungi species were obtained by using the backpropagation neural network (BNN) model. The accuracy of distinguishing between inoculated and control fruit was higher than 97%. The method presented in this study also allowed early detection of fungal infection, starting 24 h from inoculation when the symptoms of fungal infection are invisible. Multiple linear regression was used to create total anthocyanin content (AC), soluble solid content (SSC) and total phenolic content (TPC) models. Two wavelengths (681 and 1292 nm) were selected to create the AC model and four wavelengths (705, 842, 1162 and 2239 nm) were indicated as the most suitable for the SSC model. The coefficients of determination of the created models were R2 = 0.65 and R2 = 0.85 for AC and SSC, respectively. The results demonstrated that hyperspectral imaging technique has potential for rapid and non-invasive detection of fungal infection and for predicting and visualizing AC and SSC in strawberry fruit during storage.
The enduring relationship between dietary patterns and human health has led us to investigate the bioactive components present in fruits and vegetables for a very long time. Berries, notably the ...popular ones such as strawberry, raspberry, blueberry, blackberry, and the Indian gooseberry, are among the best known dietary sources due to the presence of a wide range of bioactive nutritive components. Bioactive components in berries include phenolic compounds, flavonoids, and tannins apart from vitamins, minerals, sugars, and fibers. Individually or synergistically, these have been shown to provide protection against several disorders. Mounting evidence suggests that consumption of berries confer antioxidant and anticancer protection to humans and animals. Free radical scavenging, protection from DNA damage, induction of apoptosis, and inhibition of growth and proliferation of cancer cells are just to name a few. This review comprehensively summarizes the key phytochemicals present in berries and their biological action in preventing oxidative stress and carcinogenesis.
딸기 탄저병: 병원·생태학적 특징 및 방제 남명현; 유제혁; 윤덕상 ...
Sigmulbyeong yeon'gu,
09/2023, Letnik:
29, Številka:
3
Journal Article
Recenzirano
Odprti dostop
Anthracnose caused by Colletotrichum spp. is a major disease of strawberry plants worldwide. The anthracnose of strawberries in Korea has occurred in most cultivated strawberry varieties since its ...first report in 1990. Although many studies and efforts have been made to control the disease, anthracnose continues to affect strawberry yields in Korea. In this review, we introduced various management methods to control anthracnose in strawberries, such as identifying pathogens and environmental factors involved in this disease, understanding the importance of latent infection, and developing diagnostic techniques and control methods. Through this review, we propose that researchers can elucidate a comprehensive and practical approach to control anthracnose by understanding this disease and developing strategies to prevent its spread, ultimately benefiting strawberry farmers. Colletotrichum spp.에 의해 발생하는 딸기 탄저병은 전 세계적으로 문제가 되는 중요한 병해이다. 우리나라 딸기 탄저병은 1990년에 최초 보고된 이후 현재까지 재배되고 있는 대부분 딸기 품종에 발생하여 피해를 주고 있다. 현재 딸기 탄저병을 효과적으로 방제하기 위한 많은 노력과 연구들이 진행되고 있지만 지속적으로 발병되고 있어 탄저병 방제를 위한 종합적 검토가 필요한 실정이다. 본 리뷰에서는 현재까지 연구된 논문들을 기초로 탄저병에 관여하는 병원균, 잠재감염주 중요성과 진단기술, 탄저병 발생에 미치는 환경요인 및 방제 방법 등 다양한 딸기 탄저병 관리방법을 소개하였다. 본 리뷰를 통해 딸기 탄저병을 더 이해하고 최신 방제와 관련된 연구들을 살펴봄으로써 딸기 재배농가들과 연구자들이 종합한 탄저병 방제를 위해 종합적이고 효과적인 접근에 도움이 되길 기대한다.
Postharvest decay is the leading constraint for extension of shelf life and marketing of strawberry fruit. In this work, strawberry fruit were treated with DENBA+ (0, control; 500 or 1200 V) and ...stored at 4 ℃ for 11 d to investigate its effect on postharvest quality. DENBA+ treated fruit showed reduced decay index, weight loss, firmness and pH value, compared to control. DENBA+ treatment had higher contents of soluble solids, total sugar, total phenol and anthocyanin, compared to control. In conclusion, DENBA+ could be considered an ecofriendly non-chemical alternative treatment for postharvest quality management of strawberry fruit.
•Impact of DENBA+ on the storage life of strawberry fruit was studied.•Decay index and weight loss were lower in treated strawberries compared to control.•DENBA+ treatment maintained total sugar, total phenol and total anthocyanin content.•The best results were obtained at voltage strength of 500 V.
Summary
The RAV (related to ABI3/viviparous 1) group of transcription factors (TFs) play multifaceted roles in plant development and stress responses. Here, we show that strawberry ...(Fragaria × ananassa) FaRAV1 positively regulates anthocyanin accumulation during fruit ripening via a hierarchy of activation processes. Dual‐luciferase assay screening of all fruit‐expressed AP2/ERFs showed FaRAV1 had the highest transcriptional activation of the promoter of FaMYB10, a key activator of anthocyanin biosynthesis. Yeast one‐hybrid and electrophoretic mobility shift assays indicated that FaRAV1 could directly bind to the promoter of FaMYB10. Transient overexpression of FaRAV1 in strawberry fruit increased FaMYB10 expression and anthocyanin production significantly. Correspondingly, transient RNA interference‐induced silencing of FaRAV1 led to decreases in FaMYB10 expression and anthocyanin content. Transcriptome analysis of FaRAV1‐overexpressing strawberry fruit revealed that transcripts of phenylpropanoid and flavonoid biosynthesis pathway genes were up‐regulated. Luciferase assays showed that FaRAV1 could also activate the promoters of strawberry anthocyanin biosynthetic genes directly, revealing a second level of FaRAV1 action in promoting anthocyanin accumulation. These results show that FaRAV1 stimulates anthocyanin accumulation in strawberry both by direct activation of anthocyanin pathway gene promoters and by up‐regulation of FaMYB10, which also positively regulates these genes.
Strawberry (
spp.) has emerged as a model system for various fundamental and applied research in recent years. In total, the genomes of five different species have been sequenced over the past 10 y. ...Here, we report chromosome-scale reference genomes for five strawberry species, including three newly sequenced species' genomes, and genome resequencing data for 128 additional accessions to estimate the genetic diversity, structure, and demographic history of key
species. Our analyses obtained fully resolved and strongly supported phylogenies and divergence times for most diploid strawberry species. These analyses also uncovered a new diploid species (
Jia J. Lei). Finally, we constructed a pan-genome for
and examined the evolutionary dynamics of gene families. Notably, we identified multiple independent single base mutations of the
gene associated with white pigmented fruit shared by different strawberry species. These reference genomes and datasets, combined with our phylogenetic estimates, should serve as a powerful comparative genomic platform and resource for future studies in strawberry.
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