EFFECT OF KAOLIN APPLICATIONS ON FRUIT SUNBURN, YIELD AND FRUIT QUALITY OF BALADY MANDARIN (Citrus reticulata, Blanco)

Ennab, H. A.; El-Sayed, Somaia A.; El-Enin, M.M.S. Abo

doi:10.21608/mjppf.2017.176024

Cited by 12 publications

(10 citation statements)

References 4 publications

(7 reference statements)

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“…Kerns and Wright [15] reported that kaolin application on lemon trees lowered the temperature of the fruit surface, reduced sun injuries, and improved yield and fruit quality. Ennab et al [18] mentioned that kaolin foliar spraying at concentrations of 3% and 4% decreased leaf heat and fruit surface temperature and reduced the number of sunburned fruits of 'Balady' mandarin trees. Baiea et al [3] found that kaolin foliar spray at concentrations of 25.5 and 75 g/L reduced fruit sunburn damage and improved the yield and fruit quality of Keitt mango fruits.…”

Section: Introductionmentioning

confidence: 99%

Kaolin Improves Photosynthetic Pigments, and Antioxidant Content, and Decreases Sunburn of Mangoes: Field Study

et al. 2022

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The Keitt mango tree has a low canopy that leads to an increase in sunburned fruits. Hence, the fruit quality is markedly reduced due to the fruit being exposed to physiological disorders. The sunburn injury problem is common due to high levels of solar radiation and the low number of leaves, which minimizes the protection of small, newly formed fruits. Kaolin spray has emerged as a promising approach for mango trees since it improves vegetative growth, yield, and fruit quality in new lands. This search aimed to study the influence of spraying kaolin on Keitt mango trees grafted on ‘Succary’ rootstock. The treatments were as follows: control, 2%, 4%, and 6% of kaolin. Our results indicated that the applications of kaolin significantly improved leaf area, tree canopy volume, photosynthesis pigments such as chlorophyll-a and b, carotenoids of leaf and yield (kg/tree), and the physical and chemical characteristics of Keitt mango cultivar in comparison with the control. A higher concentration of kaolin decreased the leaf content of antioxidants such as total phenolic, total flavonoid, CAT, POX, and PPO enzyme activities. Furthermore, the number of sunburned fruits was significantly reduced after the application of kaolin in comparison to control fruits. Regarding vegetative growth, our results indicated that adding kaolin at 6% enhanced the leaf surface area and tree canopy volume compared to the control and other treatments. A similar trend was noticed regarding yield and fruit quality, whereas the best values were obtained when kaolin was sprayed at a concentration of 6%. In conclusion, the application of kaolin can improve the production and fruit quality of Keitt mango trees by reducing the effects of adverse summer conditions.

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Section: Introductionmentioning

confidence: 99%

Kaolin Improves Photosynthetic Pigments, and Antioxidant Content, and Decreases Sunburn of Mangoes: Field Study

et al. 2022

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“…As a result, it reduces the adverse effects of drought stress. The effects of lowering temperature are reducing water consumption, increasing chlorophyll content, maintaining the quantitative and qualitative characteristics of the product, and preventing bursting and sunburn of citrus fruit, which was found in research conducted on Balady mandarin (Citrus reticulata Blanco) [29] and grapefruit [28] have been evident. Figure 6 shows page mandarin (C. reticulata) trees sprayed with kaolin.…”

Section: Green and Reticular Polyethylene Shades With One (A) Two (B)...mentioning

confidence: 93%

“…Another strategy proposed in recent years to deal with the harmful effects of drought stress and the high summer temperature is using antiperspirant and sunlightreflective compounds, such as kaolin. Kaolin is a natural clay with an aluminum phyllosilicate (Al 2 Si 2 O 5 (OH) 4 ) structure, which is chemically neutral in a wide range of pH changes and does not harm living organisms [28,29].…”

Section: Drought Stress and Its Management And Mitigation Strategiesmentioning

confidence: 99%

“…It can also significantly help to expand the growth of citrus fruits in areas that suffer from summer heat stress. The main effect of kaolin is to increase solar radiation reflection and reduce, consequently, the temperature of the leaves exposed to light in the hottest hours [29,34]. By reflecting a part of the light irradiated to the plant, kaolin significantly reduces the temperature of the leaves.…”

Section: Green and Reticular Polyethylene Shades With One (A) Two (B)...mentioning

confidence: 99%

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Abiotic Stresses Management in Citrus

Rafie-Rad¹,

Moradkhani²,

Golchin³

et al. 2023

Citrus Research - Horticultural and Human Health Aspects

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Citrus production is affected globally by several environmental stresses. Some citrus-producing regions suffer from severe ecological abiotic stresses, including cold, soil salinity and sodicity, extreme temperature, and drought. These abiotic stresses can alleviate the growth, fruit yield, and quality of citrus. Strategies that attempt to sustain and increase tolerance of citrus against the negative effect of abiotic stresses are the use of antiperspirant compounds, phytohormones, synthetic and natural growth regulators, soil and plant moisture retaining tools and structures, nutrition management, application of organic fertilizers, rootstocks breeding in citriculture, and others. These strategies increase the yield and growth of the plant along with the relative improvement of the fruit quality during the growth and fruiting period, increasing the absorption of water and nutrients, the extensive accumulation of osmolytes and the increase of antioxidant enzymes, changes in the amount of signaling substances, and the expression of genes under stress, increase tolerance to abiotic stresses in citrus fruits. In this review, we tried to provide a summary of the abiotic stress management in citrus by literature.

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“…Therefore, sunburned satsuma mandarin fruits are undesirable among farmers and consumers. Although previous citrus studies to suppress sunburn using kaolin, calcium carbonate, and shading treatment have been conducted [ 18 , 19 , 20 ], few systematic studies showed the effect of sunburn on anatomical difference and physiological responses to satsuma mandarin quality.…”

Section: Introductionmentioning

confidence: 99%

The Anatomical Differences and Physiological Responses of Sunburned Satsuma Mandarin (Citrus unshiu Marc.) Fruits

Kim

Park

Yun

et al. 2022

Plants

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Sunburn causes fruit browning and other physiological symptoms, reducing fruit production and quality. Therefore, we aimed to investigate the anatomical differences and abiotic stress responses in ‘Nichinan 1 gou’ satsuma mandarin (Citrus unshiu Marc.) according to the severity of sunburn damage (five grades: control, no sunburn; I to IV, increasing severity of sunburn). Additionally, the quality of sunburned and non-sunburned fruits was compared, and the sunburn-inducing temperature was estimated. Anatomical observations confirmed that with increased severity of symptoms, the damage to fruit rind surface and oil glands was increased. In the analysis of peel pigments, chlorophyll content in the rind gradually decreased compared with IV, whereas the carotenoid content gradually increased up to III. The flavonoid content in the peel and pulp was the highest in III. In the 1,1-diphenyl-2-picrylhydrazyl and 2,2′-azinobis (3-ethylbenzothiazoline-6-sulfonic acid) radical analyses, the IC50 (the concentration of compound at which the percentage of inhibition is 50%) value was the lowest in grade III in peel or IV in pulp, indicating a high free radical scavenging ability. The fruit quality analysis between sunburned and non-sunburned fruits showed differences in total soluble solid content, total acidity, firmness, coloration, and free sugar and organic acid contents, indicating a significant effect on fruit quality. In the heat tolerance tests on fruit rind in the laboratory and field, the damage was confirmed at temperatures above 47 °C.

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EFFECT OF KAOLIN APPLICATIONS ON FRUIT SUNBURN, YIELD AND FRUIT QUALITY OF BALADY MANDARIN (Citrus reticulata, Blanco)

Cited by 12 publications

References 4 publications

Kaolin Improves Photosynthetic Pigments, and Antioxidant Content, and Decreases Sunburn of Mangoes: Field Study

Kaolin Improves Photosynthetic Pigments, and Antioxidant Content, and Decreases Sunburn of Mangoes: Field Study

Abiotic Stresses Management in Citrus

The Anatomical Differences and Physiological Responses of Sunburned Satsuma Mandarin (Citrus unshiu Marc.) Fruits

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