Plant Productions

The Effect of Heat Treatment and UV-C Radiation on Biochemical Compounds, Enzymatic Activity and Decay Rate of Thomson Novell orange fruit

Shohreh Zivdar; Naser Alemzadeh Ansari; Hossein Fereydoni; Hojjatollah Rabbani Nasab; Mohammad Hossein Razzaghi

Articles in Press, Accepted Manuscript, Available Online from 11 September 2022

https://doi.org/10.22055/ppd.2022.39210.2002

Abstract

IntroductionCitrus is one of the most important horticultural products that is mainly produced in the subtropical regions of the world. Citrus fruits are susceptible to a number of ... Read More IntroductionCitrus is one of the most important horticultural products that is mainly produced in the subtropical regions of the world. Citrus fruits are susceptible to a number of fungal diseases that cause significant losses in the citrus industry in the post harvest stage. Worldwide, diseases have been primarily controlled for many years by the application of conventional fungicides. However, human health risks and environmental contamination associated with chemical residues and the proliferation of resistant strains of the pathogens are major problems associated with the continuous and widespread use of conventional post harvest fungicides. Heat and UV radiation treatments are the most common physical means used to control post harvest diseases of fresh fruits. The aim of this study was to investigate the effects of UV-C radiation and Hot Air Flow (HAF) treatment on decay control and some biochemical properties in Thomson navel oranges at cold storage. Materials and MethodsIn this experiment, the effects of heat treatments (37 °C for 24 hours), UV radiation (7.92 kJ / m2) and combination treatment (HAF*UV) on the storage life of Thomson oranges were investigated. The statistical model of factorial experiment was in the form of a completely randomized design in which two factors of storage time and treatments were considered. After treatment, the fruits were stored at 5 ° C for 90 days during the storage period, the percentage of decay, fruit weight loss, and some biochemical properties and enzymatic activity were investigated. Statistical analysis of data was performed using SAS software and the mean data were compared using Duncan's multiple range test at a five percent probability level using MSTATC software.Results and discussion:In this study, the effect of UV-C radiation and hot air flow on the rate of decay, weight loss, biochemical characteristics and activity of a number of enzymes involved in the oxidation of Thomson Novel orange fruit was investigated.Treatments included control (no application of any treatment) radiation (UV-C radiation with an intensity of 7. 98 KJ m2), hot air (hot air 37 °C for 24 hours) and combination (UV-C + hot air) which in The four storage times of zero, 30, 60 and 90 days were examined in factorial format based on a completely randomized design. The results showed that radiation and heat treatment effectively reduced fruit rot . the lowest and highest percentage of cumulative rot was observed in the combined treatment with an average of 3.8% and the control treatment with an average of 12.7%, respectively.The control treatment and the combined treatment with the average of 5.68 and 2.94, respectively, had the highest and lowest fruit weight loss. During fruit storage, TSS, TA, TSS/TA and pH increased and TA decreased The amount of ascorbic acid in fruits treated with hot air flow with an average of 35.54 mg per 100 g of fresh material was higher than the control treatment with an average of 30.67 mg per 100 g of fresh material. Antioxidant activity increased at the beginning of the period, however, the treatments did not have a significant effect on inhibiting DPPH radical activity in fruit flesh The amount of total phenol, peroxidase and polyphenol oxidase enzyme activity in fruit flesh under the influence of heat treatment, initially increased with the period, which the enzyme activity decreased with increasing storage time. According to the evaluated traits, heat and combination treatment succeeded in reducing the rate of rot and increasing the biochemical properties of the fruit during storage, so it can be considered as a suitable practical option.

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The effect of two hydroponic systems on physical, chemical and fruit yield of two greenhouse tomato cultivars

Mohammad Reza Fayezizadeh; Naser Alemzadeh Ansari; Esmail Khaleghi; Mohamad Albaji

Volume 46, Issue 1 , June 2023, , Pages 11-23

https://doi.org/10.22055/ppd.2021.35144.1943

Abstract

IntroductionTomato is an economical high value product which is used fresh or processed. Having compound such as fibers, vitamin A, vitamin B, lycopene, carotenoids, ascorbic acid and ... Read More IntroductionTomato is an economical high value product which is used fresh or processed. Having compound such as fibers, vitamin A, vitamin B, lycopene, carotenoids, ascorbic acid and polyphenols in this product leads to prevent the cancer and cardiovascular diseases. Even though biosynthesis and accumulation of this biochemical matter in tomato fruit when growing is affected by the production conditions such as methods of production environmental factors and plant genetics. Tomatoes produced in a closed hydroponic system have better flavor and marketability. This research is done to show the affects to the physical and chemical characteristics and productivity of two greenhouse tomato cultivars in two open and closed systems. Materials and MethodsIn this research the effects of two open (drip) and closed (modified nutrient film technique) hydroponic systems on physical and chemical characteristics and productivity of two greenhouse tomato cultivars (V4-22 cultivar breaded in Shahid Chamran University of Ahvaz and Amira cultivar from Rijkzwaan company of Netherland) was studied as split plot based on a randomized complete block design with three replications in agricultural faculty of Shahid Chamran University of Ahvaz. The information gathered and correlation between characteristics were analyzed statically by MSTAT-C 1.2 software. To compare the means, Duncan's multi domain test in 5% level was used. Some of the quantitative and qualitative characteristics include productivity, fruit length, fruit diameter and fruit volume, fruit firmness, pH, titratable acidity, total soluble solid, fruit dry matter, lycopene, fruit carotenoids, antioxidant capacity, polyphenols content, concentration of fruit elements such as potassium, sodium, calcium and magnesium were analyzed. Results and DiscussionThe results of the experiment showed that the most fruit length, fruit firmness, and calcium concentration were recorded in the plants cultivated in open system and the highest total soluble solid, lycopene, carotenoids and fruit sodium concentration were seen in the closed system. The most antioxidant capacity, polyphenols content, concentration of calcium and sodium were observed in Amira cultivar and the most titratable acidity was recognized in V4-22 cultivar. The maximum yield belonged to V4-22 cultivar (3847/29 g per plant) and minimum yield belonged to Amira cultivar (3648/70 g per plant). The interaction effect of hydroponic system and cultivar on concentration of magnesium and potassium in 1% level and dry matter in 5% level were significantly different. The correlation between Antioxidant capacity, fruit total soluble solids content, vitamin C, lycopene and polyphenols content with potassium concentration was positive and significant. ConclusionThe results showed that V4-22 cultivar had higher yield than Amira cultivar and this is due to the adaptation of this cultivar to the environmental conditions of Ahvaz greenhouse. In this study, crop yield in both open and closed systems was not significantly different and the closed system increased the quality characteristics of fruit including total soluble solids, lycopene and carotenoids compared to the open system. This can be due to the most availability of nutrient solution in the closed system compared to the open system. The lowest capacity of antioxidant and total polyphenols were obtained in V4-22 cultivar. The decrease in production of these secondary metabolites indicates that this cultivar is more compatible with production conditions.

Evaluation of the Accumulation of Nitrate and Nitrite in Vegetables Grown in Different Regions of Ahvaz

Naser Alemzadeh Ansari; Dariush Sharif Manesh; Sadegh Mousavi fard

Volume 42, Issue 3 , December 2019, , Pages 333-344

https://doi.org/10.22055/ppd.2019.26457.1626

Abstract

Abstract Background and Objectives Khuzestan Province is one of the most important areas that provide vegetables throughout winter and spring in Iran. The vegetables are ... Read More Abstract Background and Objectives Khuzestan Province is one of the most important areas that provide vegetables throughout winter and spring in Iran. The vegetables are mainly picked up in the afternoon, so it cannot be supplied to the market. In this time of the day, the minimum amount of nitrate is accumulated in leafy vegetables, with a gradual increase throughout the night. On the other hand, its highest level is in the early hours in the morning. The purpose of this study is to evaluate nitrate and nitrite accumulation in vegetables produced in different areas of Ahwaz during winter and spring. Materials and Methods This experiment was conducted in a randomized complete block design arranged in a split-split-plot design with three replications in the Department of Horticulture, College of Agriculture, Shahid Chamran University of Ahvaz. In the treatments viz. first to third harvest dates (1): February 6, 2016, (2):March 4, 2016 and (3): April 7, 2016 respectively were the main factors and nine vegetable species (including coriander, parsley, mint, fenugreek, chard, spinach, leeks, dill and watercress) kept in sub plot, three vegetable production areas in Ahvaz were arranged in sub plot in sub plots and three fields were selected in each of these areas. Before and after cultivation, all planting, harvesting and harvesting operations were carried out on the same field in the selected fields. The concentration of nitrate was measured by the method introduced by Cataldo et al. (1975) and the nitrite concentation was measured via the method of Abu-Dayeh (2009). The data were analyzed using SAS software and the mean comparison was calculated using Duncan's multiple range tests at a probability level of 5%. Results Nitrate and nitrite contents of the produced vegetables were different depending on various regions, harvesting time and vegetable species. The highest nitrate content was observed in parsley fromthe first harvest in the southern region of Ahwaz (4.4 mg/kg-1 dry matter) and the lowest amount of nitrate was recorded in watercress from the third harvest in the northern region of Ahvaz (1.4 mg/kg-1 dry matter). Also, the highest nitrite content was observed at the first harvest in the westhern region of Ahwaz in mint and the lowest amount of nitrate was recorded in the second harvest in the northern region of Ahvaz in chard. In winter, the environmental conditions in Ahwaz are suitable for the growth and development of leafy vegetables (Boroujerdnia et al., 2007); however, soil conditions provide manganese uptake by plants. Moreover, high light intensity is another factor which can decrease nitrate in leafy vegetables. The number of cloudy days in Ahwaz is very low; therefore, the number of sunny days with high radiation intensity is high in winter. This phenomenon greatly reduces the content of nitrate in leafy vegetables. Discussion The amounts of nitrate and nitrite content in various species of vegetables produced in three regions of Ahvaz during the cold season were much lower than the standard figures. Therefore, we can conclude that the quality of vegetables produced in Ahvaz is very high in terms of nitrite and nitrate contents.

Effects of drought stress and mycorrhizal fungi on some morphophysiological characteristics of lettuce (Lactuca sativa L.)

H. Badvi; N. Alemzade Ansari; M. Mahmoodi sorestani; F. Eskandari

Volume 38, Issue 3 , December 2015, , Pages 27-39

https://doi.org/10.22055/ppd.2015.11444

Abstract

Arbuscular mycorrhizal fungi benefit from a symbiotic relationship with the plant, which is currently one of the strategies used to reduce stress. The experiment was factorial in a ... Read More

The influence of foliar application of nano zinc chelate and zinc sulfate on morphological traits of holy basil (Ocimum sanctum)

Z. Moghimi pour; M. Mahmoodi Sourestani; N. Alemzadeh Ansari; Z. Ramezani

Volume 38, Issue 3 , December 2015, , Pages 41-53

https://doi.org/10.22055/ppd.2015.11446

Abstract

Holy Basil is a perennial shrub plant that belongs to Lamiaceae family. Aerial parts of this plant have been used in food, pharmaceuticals, cosmetics and perfumery industries. Leaves ... Read More

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Author = Naser Alemzadeh Ansari

The Effect of Heat Treatment and UV-C Radiation on Biochemical Compounds, Enzymatic Activity and Decay Rate of Thomson Novell orange fruit

Abstract

The effect of two hydroponic systems on physical, chemical and fruit yield of two greenhouse tomato cultivars

Abstract

Evaluation of the Accumulation of Nitrate and Nitrite in Vegetables Grown in Different Regions of Ahvaz

Abstract

Effects of drought stress and mycorrhizal fungi on some morphophysiological characteristics of lettuce (Lactuca sativa L.)

Abstract

The influence of foliar application of nano zinc chelate and zinc sulfate on morphological traits of holy basil (Ocimum sanctum)

Abstract