scholarly journals POSTHARVEST QUALITY AND PH OF FUSARIUM-INOCULATED TOMATO FRUIT UNDER CONTROLLED ATMOSPHERES

HortScience ◽  
1992 ◽  
Vol 27 (6) ◽  
pp. 650c-650
Author(s):  
John C. Beaulieu ◽  
Mikal E. Saltveit
Keyword(s):  
Lycopersicon Esculentum ◽  
Tomato Fruit ◽  
Postharvest Quality ◽  
Temperature Dependent ◽  
Controlled Atmospheres ◽  
Significant Time ◽  
Control Fruit

Tomato (Lycopersicon esculentum Mill., cv. BHN 91) fruit were hand harvested at the pink sage of maturity and stored at 12.5, 20, and 30C in air, 3% O2 + 5% CO2, or 0.5% O2 + 20% CO2 for up to six days. Half of the fruit were inoculated with Fusarium. Control fruit retained the best appearance in 3% O2 + 5% CO2 at both 20 and 30C. Inoculated fruit at 12.5, 20 and 30C in air or 3% O2 + 5% CO2 were acceptable for 12, 3 and 2 days, respectively, but they deteriorated more rapidly compared to fruit held in 0.5% O2 + 20% CO2 as temperature and time increased. Off-odors were present in all 0.5% O2 + 5% CO2 treatments by days 12, 9 and 5 at 12.5, 20 and 30C, respectively. A significant time- and temperature-dependent increase in pH of locular and pericarp tissue, and of supernatant pH occurred in inoculated regions of fruit held in air by days 12, 6 and 3 at 12.5, 20 and 30C, respectively. In contrast, reduced acidity occurred at 9 and 5 days in 3% O2 + 5% CO2 at 20 and 30C, respectively. Generally, increased pH followed a trend with air > 3% O2 + 5% CO2 > 0.5% O2 + 20% CO2.

scholarly journals 127 Ethylene Production in Tomato Fruit in Relation to Postharvest Quality Deterioration

HortScience ◽  
2000 ◽  
Vol 35 (3) ◽  
pp. 411B-411
Author(s):  
Hakim Abdul ◽  
Pehu Eija ◽  
Voipio Irma ◽  
Khatoon Mohfeza
Keyword(s):  
Lycopersicon Esculentum ◽  
Production Rate ◽  
Ethylene Production ◽  
Tomato Fruit ◽  
Fruit Size ◽  
Postharvest Quality ◽  
Maturity Stage ◽  
Quality Deterioration ◽  
Maturity Stages ◽  
Small Fruit

Ethylene is produced by tomato fruit (Lycopersicon esculentum) at a rate that is dependent on fruit size, maturity stage, and adherence of calyxes. Production rate of ethylene declined with increased maturity stages. Small fruit produced higher ethylene compared to medium or large sizes. Ethylene production is positively correlated with rate of respiration, but not with visible pitting. Fruit stored with calyx produced less ethylene than those that were stored without calyxes.

scholarly journals Ēxopolygalacturonase Elicits Ethylene Production in Tomato

HortScience ◽  
1990 ◽  
Vol 25 (7) ◽  
pp. 779-780 ◽  
Author(s):  
Elizabeth A. Baldwin ◽  
Russell Pressey
Keyword(s):  
Lycopersicon Esculentum ◽  
Ethylene Production ◽  
Tomato Fruit ◽  
Control Fruit ◽  
Ethylene Response ◽  
Oak Pollen ◽  
Cherry Tomatoes

Exopolygalacturonase (exo-PG) (EC 3.2.1.67) was investigated for ability to induce ethylene production in green cherry tomatoes (Lycopersicon esculentum Mill.). The fruit were vacuum-infiltrated with various levels of exo-PG from green tomato fruit, squash flower, or oak pollen and compared to boiled enzyme or salt controls for ethylene production. In all cases, fruit treated with active enzymes produced significantly higher levels of ethylene than did control fruit. The ethylene response was evident 2 hours after treatment and was transient in nature, returning to basal levels by 22 hours. The amount of ethylene produced did not appear to be influenced by the source of exo-PG.

scholarly journals Postharvest Attributes of `Virosa' Tomato Fruit Produced in an Enriched Carbon Dioxide Environment

HortScience ◽  
1995 ◽  
Vol 30 (3) ◽  
pp. 490-491 ◽  
Author(s):  
M. Hossein Behboudian ◽  
Colin Tod
Keyword(s):  
Carbon Dioxide ◽  
Lycopersicon Esculentum ◽  
Ethylene Production ◽  
Tomato Fruit ◽  
Soluble Sugars ◽  
Soluble Solids ◽  
Postharvest Quality ◽  
Total Soluble Solids ◽  
Postharvest Ripening

The effect of preharvest CO2 enrichment (1000 μl·liter–1) on postharvest quality of tomato fruit (Lycopersicon esculentum Mill. `Virosa') was studied with an emphasis on soluble sugars, ripening, and mineral composition. High-CO2 fruit had higher concentrations of sucrose, glucose, fructose, and total soluble solids than ambient-CO2 fruit. High-CO2 fruit also ripened more slowly and was characterized by lower respiration and ethylene production rates than ambient-CO2 fruit. Concentrations of N, P, and K were lower in the high-CO2 fruit than in the ambient-CO2 fruit, whereas those of S, Ca, and Mg were the same for both treatments. Preharvest CO2 enrichment of `Virosa' tomato enhances fruit desirability in terms of slower postharvest ripening and higher concentrations of soluble sugars and total soluble solids.

EFFECT OF IRRIGATION AND PLANT POPULATION ON YIELD, FRUIT SPECK AND BLOSSOM-END ROT OF PROCESSING TOMATOES

1985 ◽  
Vol 65 (4) ◽  
pp. 1011-1018 ◽  
Author(s):  
C. S. TAN ◽  
B. N. DHANVANTARI
Keyword(s):  
Soil Moisture ◽  
Lycopersicon Esculentum ◽  
Pseudomonas Syringae ◽  
Tomato Fruit ◽  
Plant Population ◽  
Southern Ontario ◽  
Available Soil Moisture ◽  
Blossom End Rot ◽  
Irrigation Effects ◽  
Processing Tomatoes

Two tomato (Lycopersicon esculentum Mill.) cultivars, Heinz-2653 and Campbell-28, were grown on Fox loamy sand in the subhumid region of southern Ontario from 1979 to 1982. Irrigation increased the marketable yields of H-2653 in a dry year, 1982, but not in the other years. Irrigation substantially increased marketable yields of C-28 in 1979 and 1982. Irrigation, when the available soil moisture (ASM) level reached 50%, was no more effective than when the ASM level in the soil was allowed to drop to 25%. Without irrigation yield increased as plant population increased in normal and wet years, but not in a dry year. Blossom-end rot (BER) of C-28 cultivar was markedly reduced by irrigation. Effects of irrigation or plant population treatments on the incidence of fruit speck did not appear to be significant.Key words: Available soil moisture, Lycopersicon esculentum, Pseudomonas syringae pv. tomato, fruit speck

Comparison of optical and physical measurements with sensory assessment of the ripeness of tomato fruit Lycopersicon esculentum

1990 ◽  
Vol 2 (4) ◽  
pp. 243-254 ◽  
Author(s):  
Mandy J. Hetherington ◽  
Alan Martin ◽  
Douglas B. MacDougall ◽  
Keith R. Langley ◽  
Nick Bratchell
Keyword(s):  
Lycopersicon Esculentum ◽  
Tomato Fruit ◽  
Sensory Assessment ◽  
Physical Measurements

scholarly journals PEMANFAATAN RADIASI GAMMA Co-60 DALAM PEMULIAAN TANAMAN TOMAT (Lycopersicon esculentum L.) DENGAN METODE MUTAGEN FISIK

2017 ◽  
Vol 18 (1) ◽  
pp. 12
Author(s):  
I Gusti Agung Ngurah Ari Kusuma Putra ◽  
I Gusti Ngurah Sutapa ◽  
I Gde Antha Kasmawan
Keyword(s):  
Lycopersicon Esculentum ◽  
Gamma Radiation ◽  
Tomato Plant ◽  
Vitamin B1 ◽  
Radioactive Material ◽  
Tomato Fruits ◽  
Induced Mutation ◽  
Control Fruit ◽  
Human Effort ◽  
Radiation Genetic

A research on Co-60 gamma radiation effect of induced mutation in physiological growth of tomato plant (Lycopersicon Esculentum L.) has been done. Tomato plant quality can be improved through induced mutation Co-60 gamma radiation. Genetic change could be caused by induced mutation from radioactive material as a human effort. IRPASENA plant with Co-60 gamma radiation source exposed with dosage treatment of 50 Gy, 100 Gy, 150 Gy, 200 Gy and 250 Gy in tomato seeds. The measurement carried out against the physiological growth of plant height, leaves width, amount and weight of tomato fruits at the first week until harvest time. Result shows that the correct radiation dosage for tomato breeding is 100 Gy. Radioactivity concentration in improved tomato fruits after radiation exposure is less than 1.00 Bq/kg. Vitamins content on improved tomato fruits after exposure, particularly on vitamin C is 130.000 mg/kg compared to control fruit that is 70.000 mg/kg, the vitamin B1 also shows increased value (0.63 mg/kg) compared with control fruit (0.496%).

scholarly journals Effect of short-term controlled atmospheres on the postharvest quality and sensory shelf life of red raspberry (Rubus idaeus L.)

2020 ◽  
Vol 18 (1) ◽  
pp. 352-358 ◽  
Author(s):  
Brianda D. González-Orozco ◽  
Edmundo M. Mercado-Silva ◽  
Eduardo Castaño-Tostado ◽  
Ma. Estela Vázquez-Barrios ◽  
Dulce M. Rivera-Pastrana
Keyword(s):  
Shelf Life ◽  
Rubus Idaeus ◽  
Postharvest Quality ◽  
Red Raspberry ◽  
Short Term ◽  
Controlled Atmospheres

FRUIT DISORDER OF GLASSHOUSE TOMATOES CAUSED BY A TOBACCO FORM OF TOBACCO MOSAIC VIRUS

1975 ◽  
Vol 55 (2) ◽  
pp. 597-604
Author(s):  
W. R. ALLEN ◽  
K. C. CHADHA
Keyword(s):  
Lycopersicon Esculentum ◽  
Tobacco Mosaic Virus ◽  
Mosaic Virus ◽  
Tomato Fruit ◽  
Cross Protection ◽  
Mature Fruit ◽  
Leaf Stage ◽  
Lycopersicon Esculentum Mill ◽  
Dark Green

A severe fruit disorder of tomato (Lycopersicon esculentum Mill.) was induced with a tobacco form of tobacco mosaic virus isolated from blemished tomato fruit (cv. Ohio WR25) from a glasshouse crop in southwestern Ontario. Symptoms on green tomatoes consisted of slightly sunken, pale or yellowish-brown lesions with a thin, dark green margin. Lesions frequently expanded and coalesced along the flutes. The shoulders of the fruit were the most extensively affected areas. On mature fruit, the lesions appeared either silvery or silvery-brown and generally had a scabby appearance due to cracking and lifting of the surface tissues. Lesions were superficial and internal symptoms were not detected. First-truss inoculations prevented or delayed the fruit disorder. Inoculations at truss stages two, three, and four, however, resulted in development of affected fruit on inoculated as well as lower and subsequent trusses with the exception of the first truss. Similar susceptibilities to the fruit disorder occurred among the glasshouse cultivars Michigan Ohio (Burghart strain), Ohio WR25, Vantage, Veegan, and Vendor. No cross protection against the fruit disorder was provided by a mild tomato form of TMV introduced at the second-leaf stage.

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