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Reduction of Chilling Injury and Ultrastructural Damage in cherry tomato Fruits After Hot Water Treatment

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Agricultural Sciences in China 2009年第3期8卷 304-310页

作者： YANG Jing, FU Mao-run, ZHAO Yu-ying and MAO Lin-chun Department of Food Science and Nutrition, College of Biosystem Engineering and Food Science, Zhejiang University, Hangzhou 310029, P.R.China Department of Food Science and Nutrition College of Biosystem Engineering and Food Science Zhejiang University Hangzhou 310029 P.R. China

The effects of hot water treatment in alleviating chilling injury and reducing ultrastructural damage of mature-green cherry tomatoes （Lycopersicun esculentum cv. cerasiform Alef） were investigated. Mature-green cherry tomato fruits were treated in water at 40℃ or 45℃ for 5 min or 15 min, and then stored at 5℃ for 19 days followed by ripening at 20℃. Water treatment at 40℃ for 15 min increased tolerance of cherry tomato fruits to chilling stress, indicating as low outbreak of skin lesion, high color a＊ value, and low electrolyte leakage. Treated fruits showed typical climacteric respiration and developed normal red color with chlorophyll degradation and lycopene accumulation during ripening, while fruits without treatment failed to develop red color and suffered skin lesion. After 19 days of chilling, heated fruits showed the conversion of chloroplast to chromoplast with the disappearance of thylakoids. Mitochondria and other cell organelles were not adversely affected in treated fruits. However, ultrastructures in pericarp cells in control fruits severely damaged with extensive disorganization of cytoplasm, swelled chloroplasts, distorted and unstacked thylakoids. Chloroplast was the first and most severely impacted organelle by chilling stress. Hot water treatment （40℃ for 15 min） before storage alleviated chilling injury in cherry tomato fruits. The results suggest that chilling injury is related with the damage of cell structure under chilling stress.

关键词： cherry tomato chilling injury heat treatment ultrastructure

Design and test of robotic harvesting system for cherry tomato

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International Journal of Agricultural and Biological Engineering 2018年第1期11卷 96-100页

作者： Qingchun Feng Wei Zou Pengfei Fan Chunfeng Zhang Xiu Wang Beijing Research Center of Intelligent Equipment for Agriculture Beijing Academy of Agriculture and Forestry SciencesBeijing 100097China National Research Center of Intelligent Equipment for Agriculture Beijing 100097China Beijing Key Laboratory of Intelligent Equipment Technology for Agriculture Beijing 100097China

Harvesting of fresh-eating cherry tomato was highly costly on labor and *** order to achieve mechanical harvesting for the fresh-eating tomato,a new harvesting robot was designed,which consisted of a stereo visual unit,an end-effector,manipulator,a fruit collector,and a railed *** robot configuration and workflow design focused on the special cultivating *** key parts were introduced in detail:a railroad vehicle capably moving on both ground and rail was adopted as the robot’s carrier,a visual servo unit was used to identify and locate the mature fruits bunch,and the end-effector to hold and separate the fruit bunch was designed based on the stalk’s mechanical *** field test of the new developed robot was conducted and the results were *** successful harvest rate of the robot was 83%,however,each successful harvest averagely needed 1.4 times attempt,and a single successful harvesting cycle cost 8 s excluding the time cost on moving.

关键词： cherry tomato harvesting robot visual servo configuration design field test

Antibacterial Activities of Three Kinds of Plant Extracts against Ralstonia solanacearum of cherry tomato

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Plant Diseases and Pests 2016年第2期7卷 15-17页

作者： Chen Yinhua Cao Pengfei Lishui Institute of Agricultural Science Lishui 323000 China

Bacterial wilt has become an important obstacle restricting high quality and high yield of cherry tomato. In this paper, the antibacterial activities of ex- tracts from Allium sativum, Ginkgo biloba and Lygodium japonicum against Ralstonia solanacearum were compared. The results indicated that with the increasing concentrations of three extracts, the antibacterial effect enhanced gradually. The lowest concentrations of three extracts with the inhibitory effects significantly higher than that of pesticide control were 20% A. sativum extract, 40% G. biloba extract and 60% L japonicum extract, and the antibacterial effect of 20% A. sativum extract was significantly higher than those of other two plant extracts. The inhibition zone diameters of R. solanacearum strains B2. 1.2.2, I1.2. 1.1, KS. 1.1.1 and 1.***.3.1.2 were 9.23, 8.30, 8.12 and 9.19 mm, respectively. The antibacterial effects of three plant extracts reached the maximums when the concentration was 100%, but A. sativum extract had the strongest antibacterial effect against test strains. Therefore, A. sativum can be used as the main raw material for development of plant protectant for cherry tomato.

关键词： cherry tomato Ralstonia solanacearum Antibacterial activity

Effects of Different Soil Nutrient on the Soluble Solids Content of cherry tomato

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Agricultural Science & Technology 2015年第1期16卷 136-139页

作者：万学闪周才旻陈青陵水县农业技术管理局海南陵水572400

In order to choose main factors of soil nutrient affecting cherry tomato fruit quality, the soil nutrient content and total soluble solids （TSS） content of cherry tomato in different regions of Lingshui County in Hainan Province was determined, with Millennium cherry tomato as material. The results showed that the TSS content in mature cherry tomato fruit was extremely significant positive to available potassium and exchangeable calcium content in soil, with correlation coefficients of 0.587＊＊ and 0.514＊＊, respectively. The TSS content was significant positive to zinc content, with a correlation coefficient of 0.324＊, And the TSS content showed extremely significant negative to copper content with correlation coefficient of-0.613＊＊ and significant negative to sulfur content with a correlation coefficient reaching -0.332＊. In certain range of contents, the quality of cherry tomato fruit in Lingshui County could be improved through increasing the content of available potassium, exchangeable calcium and zinc in soil, as well as control copper and sulfur content.

关键词： cherry tomato Soil nutrient Fruit quality Correlation

Grafting and Seedling Cultivation Technology of cherry tomato for Disease Prevention in Hainan

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Plant Diseases and Pests 2022年第3期13卷 29-30页

作者： Ziji LIU Weixia LIU Yuling QIN Yan YANG Tropical Crops Genetic Resources Institute Chinese Academy of Tropical Agricultural SciencesHaikou 571101China

In order to reduce the occurrence of soil-borne diseases,such as tomato bacterial wilt and Fusarium wilt,and to improve the yield of cherry tomato in Hainan,the paper had summarized grafting and seedling technology of cherry tomato from the aspects of rootstock selection,rootstock seedling cultivation,scion seedling cultivation,preparation before grafting,grafting method and seedling management after *** was found that the technique could significantly improve the yield and disease resistance of cherry tomato.

关键词： cherry tomato Casing grafting Grafting and seedling cultivation

Effects of biofertilizer and water-saving irrigation interactions on the leaf photosynthesis and plant growth of tomatoes

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International Journal of Agricultural and Biological Engineering 2024年第2期17卷 177-185页

作者： Danyan Chen Yuchun Ai Peizhe Li Yue Dong Hailing Li Changyi Wang Xiaorui Jiang Shilong Li Yan Shen Aijun Dai Yuanyuan Feng College of Horticulture Jinling Institute of TechnologyNanjing 210038China Co-Innovation Center for Sustainable Forestry in Southern China College of Forestry and GrasslandCollege of Soil and Water ConservationNanjing Forestry UniversityNanjing 210037China Institute of Agricultural Resources and Environment Jiangsu Academy of Agricultural SciencesNanjing 210014China Agriculture Exchange and Cooperation Center of Shandong Province Jinan 250100China Murdoch Applied Innovation Nanotechnology Research Group College of ScienceHealthEngineering and EducationMurdoch UniversityPerthWA 5150Australia

Irrigation and fertilizer interaction is an efficient cultivation management strategy for facility ***,the effects of irrigation and fertilizer management on tomato growth and its physiological factors remain *** this study,two irrigation patterns(W1,conventional irrigation;W2,water-saving irrigation)and four fertilizer application patterns(CF,chemical fertilizer;BOF,biological organic fertilizer;NPK,nutrient compound fertilizer;BOF+NPK)were selected to observe the effects of their interaction on cherry tomato plant growth,leaf photosynthesis and fruit quality through pot *** results showed that W2 treatments promoted plant height growth compared to W1 under the same fertilizer ***,irrigation and fertilizer management had significant effects on net photosynthetic rate,intercellular oxidation concentration,stomatal conductance and transpiration rate at the first sequence flowering and fruiting *** maximum tomato plant height(99.0 cm)was achieved under the irrigation and fertilizer pattern of BOF and W2,along with the highest fruit yield of 1.98 kg/plant,which was approximately 31.1%higher than the minimum yield under the combined CF and W2 *** W2 treatments,the application of either NPK or BOF increased the soluble sugar content of *** structural equation models showed that the soil alkali hydrolyzed nitrogen could directly significantly affect the yield and soluble *** findings suggest that optimization of irrigation-fertilizer interactions positively regulates tomato growth,providing an efficient model for tomato irrigation and fertilizer management and a reference for sustainable development of facility agriculture.

关键词： irrigation-fertilization interaction cherry tomato plant height leaf photosynthesis fruit yield and quality

Enzymatic Characterization of Pectinex XXL,a Pectinase Produced by Aspergillus niger,and Its Application in Fruit Juice Production

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现代食品科技 2024年第7期40卷 81-88页

作者： ZHU Furong LIANG Xiaomei WEI Zhifu LI Li HE Fengyuan CHENG Zhong College of Food and Quality Engineering Nanning UniversityNanning 530200China Guangxi Bingke Food Co.Ltd. Nanning 530100China

Pectinex XXL,a commercially prepared pectinase,was investigated for its potential application in the fruit juice *** acid was used as the substrate for determining the enzymatic properties of Pectinex XXL using the DNS *** to the results,the optimal pH for Pectinex XXL activity was 4.5,and the enzyme was stable in the pH range of 3.0~*** optimal pH and pH stability range are consistent with those of some tropical and subtropical *** optimal temperature for Pectinex XXL activity was 60℃,and the enzyme remained stable after one hour in a water bath set at 40℃.Additionally,the enzymatic activity was not inhibited in the presence of 1 mmol/L of Na^(+),Mg^(2+),Ba^(2+),Co^(2+),Zn^(2+),and Fe^(2+),whereas it was slightly inhibited in the presence of 2 mmol/L of K^(+)and Fe^(2+)and partially inhibited in the presence of 1 and 2 mmol/L of Ca^(2+)and Mn^(2+),demonstrating its good stability in acids and excellent thermal catalytic *** on the above experimental results,depectinization experiments were performed on plantain and cherry tomato juices using different amounts of Pectinex *** one hour reaction with 16 U/mL of the enzyme,the yields of the plantain and cherry tomato juices were substantially increased by 119.03%and 15.97%,respectively,while their light transmittance was remarkably enhanced by 37.65%and 12.35%,***,the enzyme reduced the viscosity of the plantain and cherry tomato juices by 88.29%and 29.50%,*** juice production experiments confirmed that this enzyme can significantly improve the yield and light transmittance of plantain juice,while effectively reducing its *** findings indicate the potential of Pectinex XXL in the industrial production of plantain juice.

关键词： plantain cherry tomato fruit juice Aspergillus niger pectinase