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Articles by Irasema Vargas-Arispuro
Total Records ( 2 ) for Irasema Vargas-Arispuro
  Guillermo O. Perez-Tello , Miguel Angel Martinez-Tellez , Irasema Vargas-Arispuro and Gustavo A. Gonzalez-Aguilar
  Problem statement: Cold storage is needed in order to delay senescence and achieve a longer commercial life of tropical fruits like mamey sapote (Pouteria sapota), therefore, the physiological and biochemical responses of this fruit to cold storage were evaluated.
Approach: Samples from different storage temperature (20, 10 and 2°C) were taken at five-day intervals and Chilling Injury Index (CII), decay (%), pulp firmness, weight loss (%), sucrose, fructose and glucose contents, electrolyte leakage (%), ethylene and carbon dioxide production rates and the activities of Peroxidase (POD), Polyphenoloxidase (PPO) and Phenylalanine Ammonia-Lyasa (PAL), were evaluated.
CII of fruit stored at 2 and 10°C was similar and symptoms included abnormal ripening into trimming zones close to the skin and pulp. Development of CI symptoms was more evident after 10 days of storage at 2 and 10°C. This trend may be associated with decrease of sucrose content but not with fructose that increased on fruits stored at 2°C (p<0.05). For mamey fruits stored at 2°C, the PAL activity was significant lower than in the fruits stored at 10°C, but it did not increase in response to the chilling temperature. No appreciable changes on POD activity were observed in fruit stored at 2°C. PPO activity continuously decreased on fruit stored at 2°C and similar behavior was observed on fruit stored either at 10 and 20°C, during the first 15 days of storage.
Our results demonstrated the sensitivity to mamey sapote fruits to low storage temperatures (2 and 10°C). Symptoms developed by fruit include abnormal ripening into trimming zones close to skin, as well as darkened zones into middle pulp. Sucrose content could be a better chilling injury indicator in mamey sapote than electrolyte leakage, ethylene production and POD, PPO and PAL activities.
  Consuelo Corrales-Maldonado , Miguel Angel Martinez-Tellez , Alfonso A. Gardea , Antonio Orozco-Avitia and Irasema Vargas-Arispuro
  Problem statement: In warm-winter regions, the need for intervention of chemical means to break bud rest becomes a dominant factor for maintaining economic production of table grapes. However, the problem is more acute when farmers want to grow organic table grapes in the absence of environmentally-friendly budbreak promoters. Approach: This study aimed to evaluate the effect of a mix of naturally occurring Garlic Compounds (GC) in comparison to the conventional use of hydrogen cyanamide to promote budbreak and its effects on cluster quality in four table grape cultivars field-grown in hot region (Sonora Desert). Results: Four cultivars responded to GC, the vines bursting bud about 3 weeks after application. Quality of fruit from 4 cultivars treated with GC was excellent. Clusters weigh and berry sizes were larger than other treatments. Conclusion: Ability of GC to break dormancy in table grape grown in Sonora Desert has significant implications for organic table grape production in hot regions.
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