Synergistic Effect of Preharvest Spray Application of Natural Elicitors on Storage Life and Bioactive Compounds of Date Palm (Phoenix dactylifera L., cv. Khesab)

Ahmed, Zienab F. R.; Alblooshi, Shamsa S. N. A.; Kaur, Navjot; Maqsood, Sajid; Schmeda-Hirschmann, Guillermo

doi:10.3390/horticulturae7060145

Cited by 27 publications

(15 citation statements)

References 52 publications

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“…Therefore, plants grown in the organic solution had lower IC 50 value (153.1 ug/mL) which means they had significantly higher antioxidant activity compared to inorganic plants. Higher levels of phenolic, flavonoids, chlorophyll, and carotenoids in the plant were mostly associated with antioxidant activity, which is consistent with our findings [27,47]. Consequently, the higher antioxidant activity observed in lettuce plants growing in organic NS could be due to the higher content of phenolic compounds, flavonoid, chlorophyll and carotenoids obtained in these plants (Tables 2 and 3).…”

Section: Antioxidant Activitysupporting

confidence: 90%

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Evaluation of Lettuce (Lactuca sativa L.) Production under Hydroponic System: Nutrient Solution Derived from Fish Waste vs. Inorganic Nutrient Solution

et al. 2021

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Organic fresh products are appreciated and are gaining a good reputation regarding human health and environmental concerns. Despite the fact that hydroponics are commonly used in vegetable production, growers are looking for sustainable cultivation systems. Therefore, the objective of this study was to investigate the effect of using an organic-based nutrient solution (NS) derived from fish waste in a hydroponic system on the vegetative growth and production of lettuce compared to a conventional inorganic NS. Plant growth, yield, physiological and nutrient content parameters were determined. The results revealed that the overall growth and fresh biomass of the organic NS grown lettuce were relatively lower than those of the inorganic NS. Stomata density was significantly higher in inorganic grown lettuce compared to the organic one. However, the total chlorophyll, carotene, phenolic compounds, and flavonoid contents, as well as antioxidant activity were significantly higher in lettuce grown in organic NS compared to the inorganic one. Leaf nutrient content at harvest was significantly impacted by the type of used fertilizer. Based on these findings, in hydroponic system, organic liquid fertilizer derived from fish waste (as an alternative NS source) requires further improvements to achieve optimal growth and yield comparable to that of conventional inorganic NS.

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Section: Antioxidant Activitysupporting

confidence: 90%

“…Extraction of polyphenols and antioxidants was carried out for the dry leaf samples. The obtained extracts were used in the determinations of total phenolic content, total flavonoids content, and antioxidant activity according to Viacava et al [26] with slight modifications [27].…”

Section: Total Phenolics Flavonoids Content and Antioxidant Activitymentioning

confidence: 99%

Evaluation of Lettuce (Lactuca sativa L.) Production under Hydroponic System: Nutrient Solution Derived from Fish Waste vs. Inorganic Nutrient Solution

et al. 2021

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“…The decayed fruit were visually assessed by counting the fruit with any sign of microbial growth on the surface every other week up to full spoilage. The Rutab and decay percentages were calculated by using the following equations (Ahmed et al, 2021b;Kumar et al, 2013):…”

Section: Physiochemical Analysismentioning

confidence: 99%

“…Another natural elicitor is SA, which is a simple phenolic phytohormone with various roles in plant growth and developmental processes. Pre/ postharvest treatments with SA can dramatically enhance the quality and shelf life, and prevent deterioration in many fruits (Ahmed et al, 2021b;Chen et al, 2020;Gomes et al, 2021;Luo et al, 2011;Mohamed et al, 2014;Sayyari et al, 2009;Zhang et al, 2003). Moreover, Ch, SA, and Ca are wellknown natural elicitors that have an important role in the physiology of plant tissue (Ahmed and Palta, 2017).…”

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Preharvest Applications of Chitosan, Salicylic Acid, and Calcium Chloride Have a Synergistic Effect on Quality and Storability of Date Palm Fruit (Phoenix dactylifera L.)

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Kaur

Maqsood

et al. 2022

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The ‘Khenizi’ date palm is one of the most recognized date palm cultivars. It is commonly consumed at the Bisr, Rutab, and Tamr stages of ripening; however, the fruit has a short shelf/storage life at this stage of maturity even with refrigeration. Preharvest application of a natural elicitor chitosan (Ch) has been reported to have positive influences on quality and shelf life of many fruits; however, synergetic effects of Chand other natural elicitors have not been investigated. Therefore, this study aimed to investigate the synergistic effect of preharvest spray treatments with Ch 1% in combination with calcium chloride (Ca) 3% and salicylic acid (SA) 2 mm on ‘Khenizi’ date fruit quality and storage life. Fruit quality parameters, including physical and physiochemical characteristics, phytochemical content, and bioactive properties, were determined at harvest time and during cold storage at 2 °C for 60 days for 2 months. Our results revealed that a combination of these elicitors had significantly influenced the fruit quality during storage compared with control. For instance, Ch+SA and Ch+Ca+SA treatments improved total phenolic content (TPC), and the antioxidant activity at harvest and at specific times during the postharvest storage period. Furthermore, Ch+SA+Ca treatment significantly delayed senescence in treated fruits during cold storage for 45 days as compared with other treatments and the control. In addition, Ch+Ca-treated fruits had the lowest weight loss after 45 days of cold storage. Ch+SA treatment had the lowest microbial counts as compared with other treatments, including the control. The significance of this study is that it provides evidence that a combination of these elicitors has the potential to improve fruit quality at harvest, as well as during postharvest storage Future studies should be directed to fine tune the concentrations and combinations that may have commercial applications.

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“…Firmness retention during chilling and shelf life is associated with higher structural cell wall integrity and reduced decay Gang et al, 2015). Lower weight loss is thought to be related to higher membrane integrity leading to less decay (Saphiro and Cohen, 1994;Ali et al, 2019;Ahmed et al, 2021). Finally, a higher SSC could also lead to increased osmolarity, retaining more water resulting in higher firmness Lahaye et al, 2013).…”

Section: Cold Tolerance Might Be Related To Membrane Integrity Whereas Cold Sensitivity Might Be Related To Lack Of Ros Scavenging Capacimentioning

confidence: 99%

Reducing chilling injury in tomato: bridging the gap between cultivation and postharvest storage

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Temperature is the most important factor in extending shelf life and maintaining quality in horticultural products (Paul, 1999). Low-temperature storage has been considered to be the most effective method for maintaining the quality of many fruits and vegetables due to its effect on slowing down respiration, ethylene production, ripening, senescence, volatile alteration, and decay. In cold environment the physiological process in plants could be substantially retarded or even completely inhibited . Temperature has a profound effect on the rates of biological reaction (e.g. metabolism and respiration) because enzymes which take part in this process are extremely temperature dependent (Nunes and Emond, 2003). It has also been proved that the growth and proliferation of microorganisms which cause rotting are limited at temperature around 0°C. Moreover, at the same relative humidity, weight loss resulting from moisture loss is reduced at low temperatures. However, instead of getting benefit from low temperature storage, some fruit and vegetable experience detrimental effects known as chilling injury (CI). CI manifests as pitting, uneven and delay of colouring, development of brown areas in the peel, grainy and brown regions in tissues in the outer pericarp, and pathogen proliferation (Maa et al., 2014). CI is a disorder caused by prolonged storage at low temperature and occurs mostly in tropical and sub-tropical fruit and vegetables . Fruit such as mango, banana, papaya, guava, pineapple and tomato are chilling sensitive (Kader, 1999). Numerous intrinsic (e.g., cultivar, preharvest conditions) and extrinsic (e.g., temperature, exposure time to chilling temperatures, air humidity) factors influence severity of CI . CI induced disorders reduces quality and consumer acceptability especially for fruit and vegetables grown in tropical and sub-tropical regions as well as hamper the possibility for transportation to an extended export destination. CI leads to substantial economic losses in the horticultural chain, especially to fruit and vegetables from tropical and sub-tropical origin . The FAO stated fruit and vegetable losses in South-and Southeast Asia can reach up to 51% with more than 35% of those losses during the postharvest and distribution stages of the supply chain (FAO, 2011).Tomato (Solanum lycopersicum) is among the most produced and consumed crops in the world (FAO, 2014). However, post-harvest losses of tomato fruit can reach about 25-42% globally which represents not only quantitative but also qualitative losses (consumer acceptability and fruit nutritional content) (Arah et al., 2015). Tomato fruit quality is dependent on cultivar growing conditions and postharvest handling. The post-harvest life of tomatoes is limited by colour and firmness, and these two attributes determine the acceptance period of fresh tomatoes . In Southeast Asian countries, tomatoes are usually harvested immature, at the mature green or breaker stage which allows storage and transport over longer distance (Chomchalow et al., 2002)...

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Synergistic Effect of Preharvest Spray Application of Natural Elicitors on Storage Life and Bioactive Compounds of Date Palm (Phoenix dactylifera L., cv. Khesab)

Cited by 27 publications

References 52 publications

Evaluation of Lettuce (Lactuca sativa L.) Production under Hydroponic System: Nutrient Solution Derived from Fish Waste vs. Inorganic Nutrient Solution

Evaluation of Lettuce (Lactuca sativa L.) Production under Hydroponic System: Nutrient Solution Derived from Fish Waste vs. Inorganic Nutrient Solution

Preharvest Applications of Chitosan, Salicylic Acid, and Calcium Chloride Have a Synergistic Effect on Quality and Storability of Date Palm Fruit (Phoenix dactylifera L.)

Reducing chilling injury in tomato: bridging the gap between cultivation and postharvest storage

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