Plant Productions

Effects of Aloe vera Gel and Storage Duration on Some Biochemical Indices in Minimally Processed Pomegranate Fresh Arils

Madineh Taheri; Mokhtar Heidari; Mehdi Zarei

Volume 42, Issue 4 , December 2019, , Pages 495-508

https://doi.org/10.22055/ppd.2019.25498.1591

Abstract

Abstract Background and Objectives The effect of different physical and chemical treatments on quality of pomegranate fruit at postharvest has been studied, but little information ... Read More Abstract Background and Objectives The effect of different physical and chemical treatments on quality of pomegranate fruit at postharvest has been studied, but little information is available in the case of pomegranate fresh aril postharvest as a ready-to-eat product. Coating is one of the treatments to preserve the postharvest quality of the pomegranate fresh aril. Since consumer health is impotant in the selection of postharvest treatment, the use of compounds extracted from plants as wax or coating agent is a safe treatment for fresh arils. Extracted gel from leaf tissue of Aloe vera L. is an herbal gel that can be used as coating agent. The objective of the present experiment was to evaluate the effects of Aloe vera gel on the postharvest quality of pomegranate fresh arils. Materials and Methods Pomegranate Fruits (known as ‘Malas Poost Zard’) were harvested from a commercial orchard located in Baghmalek, Khuzestan. Fresh arils were removed manually from fruits and treated with Aloe vera gel (0, 2.5, 5 and 10%). Fresh arils were stored at 7 oC, RH = 90% for 4, 8 and 12 days. Some biochemical characteristics including ascorbic acid, total soluble solids, titratable acidity, total phenolics, color intensity, anthocyanins and browning index were evaluated. Results Results showed that the interaction of Aloe vera gel concentration and storage duration had a significant effect on ascorbic acid, titratable acidity, total phenolics, color intensity, anthocyanins and browning index. All concentrations of Aloe vera gel decreased total soluble solids. The highest concentration of Aloe vera gel (10%) significantly increased anthocyanins/browning ratio. The quality of pomegranate fresh arils significantly decreased with the increase in the duration of storage. During storage condition of fresh arils, Aloe vera gel (2.5 – 5%) improved the color intensity of fresh arils after 4 days. Also, results showed that all concentrations of Aloe vera gel helped to preserve higher ascorbic acid after 8 and 12 days. Discussion Aloe vera gel improved the quality of pomegranate fresh arils. Aloe vera gel contains the different antioxidant and nutrients which may be responsible for the positive effects on quality of pomegarnate arils. Results showed that Aloe vera gel is a promising herbal product for coating pomegranate fresh arils. More research needs to be undertaken on the efficacy of Aloe vera gel on postharvest quality of pomegranate fresh arils and other minimally processed products.

Effects of Harvest Time and Storage Duration on Some Physical and Biochemical Indices in Pomegranate (Punica granatum L.) Fruits

F. Paimard; M. Heidari

Volume 41, Issue 1 , June 2018, , Pages 57-68

https://doi.org/10.22055/ppd.2018.13550

Abstract

Abstract Background and Objectives Preharvest and harvest conditions can affect quality and biochemical composition of fruit during storage. Pomegranate (Punica granatum L.) is a non-climactric ... Read More Abstract Background and Objectives Preharvest and harvest conditions can affect quality and biochemical composition of fruit during storage. Pomegranate (Punica granatum L.) is a non-climactric fruit and there is no clear physiological index to determine the proper harvest time. Lack of standard maturity index results in prolonged period of picking pomegranate fruit within the season. The effects of different physical or chemical treatments on postharvest quality of pomegranate fruit have been investigated in many studies, but our knowledge on the pre-harvest and harvest aspects that influence pomegranate fruit postharvest physiology is scarce. The objective of the present experiment was to determine how qualitative indices of pomegranate fruit in ‘Bagmalek’ (Khuzestan, southwest of Iran) are affected by maturity stages at harvest and storage duration. Materials and Methods A factorial design including three harvesting times and three storage durations with three replications was used for statistical analysis. Fruits of ‘Malas Post Zard’ as an important pomegranate cultivar were harvested from a commercial orchard in ‘Bagmalek’ (150 Km Ahwaz, Khuzestan, southwest of Iran). Fruits were harvested at three harvest times at 14-day intervals (14 September, 29 September and 13 October 2011) and stored for 40 and 80 days at +7 oC. Some physical (weight, surface color, decay and shriveling) and biochemical characteristics (ascorbic acid, total soluble solids, titratable acidity, pH, anthocyanin index and browning index) were evaluated. The factors were evaluated at harvest time and after 40 and 80 days. Results Regardless of storage durations, pomegranate fruit showed significant variations in total soluble solids, titratable acidity, pH and anthocyanins. Interactions of the harvest time and storage duration (for 40 and 80 days) were significant on gravity, surface color changes, shriveling, ascorbic, acid, pH, titratable acidity and fruit juice pigments (anthocyanin index and browning index). Results showed that the period 29 September until 13 October 2011 and storage duration for 40 days are the best treatments to maintaining postharvest quality of ‘Malas Post Zard’ fruits in ‘Bagmalek’ (Khuzestan, Iran). Discussion Results showed that quantity and quality indices of the pomegranate could be improved through the selection of proper harvesting time. Harvest of pomegranate fruit at different maturity stages altered fruit appearance quality indices and biochemical characteristics under ‘Bagmalek’ geographic condition, and at early harvest time (14 September), it reduced fruit quality but did not make its consumption unacceptable. More research needs to assess the effect of different climatic parameters such as temperature and light intensity on the postharvest quality of pomegranate fruits in Khuzestan.

Influence of mycorrhizal symbiosis on growth and proline content in Leek (Allium porrum L.) and two genotypes of persian Leek (Allium ampeloprasum ssp. persicum L.) under drought stress

N. Ghasem Jokar; H. Nadian; B. Khalil Moghaddam; M. Heidary; M.H. Gharineh

Volume 38, Issue 1 , May 2015, , Pages 15-26

https://doi.org/10.22055/ppd.2015.11115

Abstract

In recent years, biological approaches such as mycorrhizal symbiosis have been used to alleviate the detrimental effects of drought stress. In a pot experiment the responses of three ... Read More

The effects of different levels of sodium chloride and mycorrhizal colonization on growth, P, K and Na uptake by saffron (Crocus sativus L.)

H. Nadian; M. Heidari; M.H. Gharineh; M.H. Daneshvar

Volume 36, Issue 2 , September 2013, , Pages 49-59

Abstract

The effect of different levels of salinity arising from sodium chloride on plant growth parameters, phosphorus, potassium and sodium uptake by saffron plant with and without mycorrhiza ... Read More

Effect of row planting design and planting distance on flowering and quality of gladiolus cut flower (Gladiolus hybrida cv. Oscar (

M.H. Daneshvar; M. Heidari

Volume 36, Issue 1 , June 2013, , Pages 129-140

Abstract

The increasing of planting density of bulbous flowers is one of the most important step for more production of ornamental plants. One of the possible methods for increasing density, ... Read More The increasing of planting density of bulbous flowers is one of the most important step for more production of ornamental plants. One of the possible methods for increasing density, is cultivation of bulb plants in multiple rows pattern. In this research, the effect of one, two, and three row planting design bed were investigated on flowering and quality of Gladiolus (Gladiolus hybrida cv.Oscar) cut flower in climatic condition of Mollasani in Khuzestan province, located in south west of Iran on 1388 through 1389.. The treatments were the cultivation of corms in on row of 30 × 20 cm (control) and two and three-bed row (20 cm on row, 30 cm between main row and/or pattern with distance of 15, 20 and 25 cm between subordinate row). The results showed that cultivation of corm in three-row bed pattern with distance of 25 cm between subordinate row and/or cultivation of two-bed and three-bed row in distance between subordinate rows of 15 and 20 cm causes significant decreases on weight of cut flower, stem diameter and height of spike. Height of cut flower was not significantly different only in treatment of two-bed row with distance of 25 cm between subordinate rows when compared to control. The number of cormels were significantly decreased In treatment of three-bed cultivation pattern with distance of 25 cm between subordinate rows, as compared to control. The number of floret, only, in cultivation pattern of two-bed and three-bed row with distance of 15 cm between rows had significantly decreased when compared to control treatment. These treatments had no significant effect on diameter of cut flower, height of spike, diameter, width and weight of corms. The results indicated that the cultivation of gladiolus in pattern of multiple rows is possible but the decrease of distance between rows, reduce the quality of cut flower. It strongly suggested that more researches require to accomplish on various distances on subordinate rows.

Preliminary Evaluation of Fruits Characteristics in Selected Mango (Mangifera indica L.) Trees in Minab, (Hormozgan Province), Iran

M. Abbasy; M. Heidari; M.H. Daneshvar

Volume 35, Issue 4 , March 2013, , Pages 117-129

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Author = M. Heidari

Effects of Aloe vera Gel and Storage Duration on Some Biochemical Indices in Minimally Processed Pomegranate Fresh Arils

Abstract

Effects of Harvest Time and Storage Duration on Some Physical and Biochemical Indices in Pomegranate (Punica granatum L.) Fruits

Abstract

Influence of mycorrhizal symbiosis on growth and proline content in Leek (Allium porrum L.) and two genotypes of persian Leek (Allium ampeloprasum ssp. persicum L.) under drought stress

Abstract

The effects of different levels of sodium chloride and mycorrhizal colonization on growth, P, K and Na uptake by saffron (Crocus sativus L.)

Abstract

Effect of row planting design and planting distance on flowering and quality of gladiolus cut flower (Gladiolus hybrida cv. Oscar (

Abstract

Preliminary Evaluation of Fruits Characteristics in Selected Mango (Mangifera indica L.) Trees in Minab, (Hormozgan Province), Iran

Abstract