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Agata Leszczuk, Monika Chylińska, Emil Zięba, Tomasz Skrzypek, Ewa Szczuka, Artur Zdunek
The cell wall is an essential framework determining the overall form of the plant cell. Our study was focused on the distribution of arabinogalactan proteins (AGPs), arabinan, and homogalacturonan in fruit cells during ripening and storage with emphasis on quantitative analysis of their presence in particular regions of the cell wall - plasma membrane. The localization of the examined compounds was determined with immunohistochemistry techniques and immunogold labelling. Spatio-temporal colocalization between AGPs epitopes - [βGlcA(1→3)-αGalA(1→2)Rha] recognized by JIM13 and MAC207 antibodies, and arabinan labelled by the LM16 antibody was detected in the inner cell wall layer, in association with the plasma membrane...
October 2018: Plant Science: An International Journal of Experimental Plant Biology
Yu-Lin Hsu, Su-Chin Chen, Kao-Wei Lin, Ching-Chang Shiesh, Chih-Hsiang Lin, Wen-Bin Yeh
The presence of quarantine insect pests in fruit export can impede trade with other countries. Therefore, to reduce the risk of possible quarantine pests in exported fruit, postharvest disinfestation treatment is essential. This study investigated the effects of vapor heat treatment (VHT) on oriental fruit fly (Bactrocera dorsalis Hendel (Diptera: Tephritidae)) and melon fly (Bactrocera cucurbitae Coquillett (Diptera: Tephritidae)) which are major pests for papaya fruits. For inoculated papaya fruits weighing 550 ± 100 g, the optimal egg-inoculation density, rearing conditions, and heat tolerance for each developmental stages of both fruit flies were determined, and then analyzed to determine their survival, and assess papaya fruit quality after treatment...
August 11, 2018: Journal of Economic Entomology
Savvas Constantinou, Ana Maria Gómez-Caravaca, Vlasios Goulas, Alberto Fernandez-Gutierrez, Stefanos Koundouras, George A Manganaris
BACKGROUND: The effect of leaf removal on postharvest performance of dehydrated grapes has been poorly analyzed. The aim of this study was to evaluate the effect of leaf removal at veraison stage on the metabolites of fresh and dehydrated grapes of two indigenous Cypriot cultivars ('Mavro' and 'Xynisteri') that are destined for the production of 'Commandaria', a protected designation of origin (PDO) premium sweet wine. RESULTS: Leaf removal led to a reduction of soluble solids, titratable acidity, aroma potential and most of the phenolic groups of musts of both cultivars...
August 9, 2018: Journal of the Science of Food and Agriculture
Antje Fröhling, Antje Rademacher, Birgit Rumpold, Michael Klocke, Oliver Schlüter
In this study, the composition of the microbial community on endive lettuce ( Cichorium endivia ) was evaluated during different postharvest processing steps. Microbial community structure was characterized by culture-dependent and culture-independent methods. Endive lettuce was sampled exemplarily at four different stages of processing (raw material, cut endive lettuce, washed endive lettuce, and spin-dried (ready to pack) endive lettuce) and analysed by plate count analysis using non-selective and selective agar plates with subsequent identification of bacteria colonies by matrix-assisted laser desorption/ionization time-of light mass spectrometry (MALDI-TOF MS)...
July 2018: Heliyon
Antoine Sanon, Ilboudo Zakaria, Dabire-Binso Clémentine L, Ba Malick Niango, Nébié Roger Charles Honora
Cowpea is an essential food legume in the tropics and particularly for sub-Saharan African populations. Postharvest grain storage, however, is a major constraint for crop expansion and year-round availability due to the cowpea weevil, Callosobruchus maculatus F., the main storage pest of cowpeas in West Africa. The use of chemicals for cowpea storage is a common practice which represents, however, a risk for consumers, environment, and could also exacerbate pest control. In Burkina Faso, since the early 2000s, several scientific investigations have focused on the control of C maculatus using botanicals considered as promising and safe alternatives to chemicals...
2018: International Journal of Insect Science
Yizhong He, Jingwen Han, Runsheng Liu, Yuduan Ding, Jinqiu Wang, Li Sun, Xiaoming Yang, Yunliu Zeng, Weiwei Wen, Juan Xu, Hongming Zhang, Xiang Yan, Zhaoxing Chen, Zuliang Gu, Hong Chen, Huanqing Tang, Xiuxin Deng, Yunjiang Cheng
Naturally, resistant crop germplasms are important resources for managing the issues of agricultural product safety and environment deterioration. We found a spontaneous mutant of 'Newhall' navel orange ( Citrus sinensis Osbeck) (MT) with broad-spectrum protections against fungal pathogens in the orchard, postharvest-storage, and artificial inoculation conditions. To understand the defense mechanism of MT fruit, we constructed a genome-scale metabolic network that integrated metabolome and transcriptome datasets...
2018: Horticulture Research
Qiuyan Ban, Ye Han, Yiheng He, Mijing Jin, Shoukun Han, Jiangtao Suo, JingPing Rao
Cell wall metabolism during fruit ripening is a highly organized process that involves complex interplay among various cell wall hydrolases. Among these cell wall hydrolases, β-galactosidase has been identified to participate in cell wall metabolism via its ability to catalyze galactosyl metabolism from the large and complex side chains of cell walls. In this study, the galactose content in the pericarp increased during persimmon fruit ripening, but cell wall galactosyl residues decreased, indicating a relationship between galactose metabolism and persimmon fruit ripening...
September 2018: Plant Science: An International Journal of Experimental Plant Biology
Adrienne E H Shearer, Kalmia E Kniel
Viral contamination can compromise the safety of water utilized for direct consumption, produce irrigation, and postharvest washing of produce. Zero-valent iron (ZVI) is used commercially for chemical remediation of water and has been demonstrated to remove some biological contaminants from water in laboratory and field studies. This study investigated the efficacy of ZVI to remove human norovirus surrogates, Tulane virus (TV) and murine norovirus (MNV), from water and to characterize the reversibility and nature of viral association with ZVI...
August 3, 2018: Journal of Food Protection
Libin Wang, Min Ma, Yanru Zhang, Zhangfei Wu, Lin Guo, Weiqi Luo, Li Wang, Zhen Zhang, Shaoling Zhang
In this study, five genes involved in malic acid (MA) metabolism, including a cytosolic NAD-dependent malate dehydrogenase gene (cyNAD-MDH), a cytosolic NADP-dependent malic enzyme gene (cyNADP-ME), two vacuolar H+-ATPases gene (vVAtp1 and vVAtp2) and one vacuolar inorganic pyrophosphatase gene (vVPp), were characterized from pear fruit based on bioinformatic & experimental analysis. Their expression profile in 'Housui' pear was tissue-specific, and their expression patterns during fruit development were diverse...
August 3, 2018: Journal of Agricultural and Food Chemistry
Qian Ma, Jingli Yang
Hydrogen sulfide (H2 S), a small bioactive gas, has been proved functioning in plant growth and development as well as alleviation of abiotic stresses, which including promoting seed germination, accelerating embryonic root growth, regulating flower senescence, inducing stomatal closure, and defending drought, heat, heavy metals and osmotic stresses etc. However, the molecular functioning mechanism of H2 S was still unclear. The primary objective of this research was to analyze the transcriptional differences and functional genes involved in the H2 S responses...
August 2, 2018: Genes & Genomics
Marjan Sadat Hosseini, Seyed Morteza Zahedi, Javier Abadía, Mahdieh Karimi
Chitosan (1.0% and 2.0%) and putrescine (1.0 and 2.0 mmol/L) treatments were used to investigate the effects of these compounds on the postharvest quality and shelf-life of two banana cultivars, "Native" and "Cavendish." Fruits were stored at 15 ± 2°C and a relative humidity of 85%-90% during a 20-day period. In the controls, increases in weight loss, microbial population, total soluble solids, and ethylene production and decreases in firmness, ascorbic acid contents, and fruit lightness occurred gradually during storage...
July 2018: Food Science & Nutrition
Kangliang Sheng, ShanShan Shui, Ling Yan, Changhong Liu, Lei Zheng
Ultraviolet (UV) irradiation has been related to the extension shelf-life and maintenance of postharvest quality in fruits. However, the comparison of UV-B and UV-C treatment on the biosynthesis of phenolic compounds of grape remain unclear. This study provides a comparison on the mechanism of phenolic secondary metabolism at the same dose of 3.6 kJ m-2 UV treatment. Total phenolic compounds, total flavonoid, total flavanol, and total anthocyanin content and antioxidant activities of grapes after UV-C treatments were higher than those of the control and UV-B treatment...
August 2018: Journal of Food Science and Technology
Carmen Lopez-Joven, Ignacio de Blas, Ana Roque
Bivalve storage at inadequate temperatures contains greater densities of Vibrio parahaemolyticus. The objective of the present study was to determine if there were any differences in growth and survival of potentially pathogenic V. parahaemolyticus (tdh positive) in relation to nonpathogenic V. parahaemolyticus (tdh-trh negative) levels in Manila clams (Ruditapes philippinarum) when exposed to different postharvest temperatures. Clams were depurated then exposed to known doses of both potential pathogenic and nonpathogenic V...
October 2018: Food Microbiology
Silvia E Langer, Natalia C Oviedo, María Marina, José Luis Burgos, Gustavo A Martínez, Pedro M Civello, Natalia M Villarreal
Modification of cell wall polymers composition and structure is one of the main factors contributing to textural changes during strawberry (Fragaria x ananassa, Duch.) fruit ripening and storage. The present study aimed to provide new data to understand the molecular basis underlying the postharvest preservation of strawberry cell wall structure by heat treatment. Ripe fruit (cv. Aroma) were heat-treated in air oven (3 h at 45 °C) and then stored 8 days at 4 °C + 2 days at 20 °C, while maintaining a set of non-treated fruit as controls...
July 20, 2018: Plant Physiology and Biochemistry: PPB
Mekhala D K Vithana, Zora Singh, Stuart K Johnson, Ritu Gupta
BACKGROUND: Mango fruit harvested at green mature stage were treated with methyl jasmonate (MeJA), nitric oxide (NO) or salicylic acid (SA) to investigate their effects on phytochemical concentration in ripe fruit. RESULTS: MeJA-fumigated fruit showed the highest increase in the concentrations of gallic acid (33.0%), caffeic acid (80.0%), total phenols (38.4%) and total antioxidant capacity (20.9%) in the peel and total carotenoids (48.7%) in the pulp compared to control...
July 25, 2018: Journal of the Science of Food and Agriculture
D Rongai, N Sabatini, P Pulcini, C Di Marco, L Storchi, A Marrone
In Italy Botrytis cinerea represents the most significant disease in strawberry crops and causes major quality and quantity losses in postharvest storage. An alternative strategy to the synthetic fungicides in crop defence could be the use of bioactive compounds with high antifungal activity. This research regards the use of Punica granatum peel extract to extend the shelf life of strawberry and the proposal of a possible mechanism for its antifungal activity. In vitro and in vivo tests showed the ability of pomegranate peel extract to control strawberry gray mould...
July 2018: Journal of Food Science and Technology
Penta Pristijono, Michael C Bowyer, Christopher J Scarlett, Quan V Vuong, Costas E Stathopoulos, John B Golding
The green Tahitian limes ( Citrus latifolia ) were exposed to 7.2 kJ m-2 UV-C and 0.5 μL L-1 1-methylcyclopropene (1-MCP) treatments both separately and in combination. After treatment, fruit were stored in ethylene free (i.e. air containing < 0.005 μL L-1 ) or 0.1 μL L-1 ethylene at 20 °C and 100% RH. The results showed that UV-C treatment delayed skin degreening and reduced endogenous ethylene production compared to untreated control fruit, however these effects reduced over the storage time...
July 2018: Journal of Food Science and Technology
Li Wang, Libin Wang, Qian Chen, Guodong Chen, Shaoling Zhang, Juyou Wu, Sutian Tao
Mitochondrial calcium uniporter (MCU) plays an important role in cell senescence and aging in mammals. However, the function of MCU homologs during the ripening and senescence of postharvest fruit had not been characterized until recently. In this study, a comprehensive study was conducted on the characteristics of the MCU family genes in the pear genome. In total, seven PbrMCU genes were identified and classified into two subgroups. Whole-genome duplication (WGD)/segmental duplication is the main driving force behind their expansion...
July 20, 2018: Journal of Plant Physiology
Dinah Kirigia, Traud Winkelmann, Remmy Kasili, Heiko Mibus
Cowpea ( Vigna unguiculata ) plays an important role in sustainable food security and livelihood improvement in Sub-Saharan Africa (SSA). The crop is rich in phytonutrients and minerals, which are key in solving malnutrition and hunger crisis, a major challenge in SSA. However, physiological status, storage temperature and duration affect phytonutrient levels and postharvest life of the leafy vegetable. Despite the significant importance of cowpeas, the maturity and postharvest storage effects on quality of the leafy vegetable remains unrevealed...
June 2018: Heliyon
Nan Zhu, Di Wu, Kunsong Chen
Background: Flesh lignification, leading to increased fruit firmness, has been reported in several kinds of fruit. Understanding the mechanisms underlying fruit lignification is important to optimize the postharvest storage strategies and reduce the quality deterioration of postharvest fruit. Especially cellular level investigation of lignin deposition in fruits provides novel insight for deciphering the mechanisms underlying fruit lignification. The primary objective of this study was to establish a procedure of using Raman microspectroscopy technique to depict fruit lignification at the cell level...
2018: Plant Methods
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