REDUCING THE SALINITY IMPACT ON SOILLESS CULTURE OF TOMATOES USING SUPPLEMENTAL CA AND FOLIAR MICRONUTRIENTS

Salt stress is known as one of the most severe abiotic factors limiting the plant production all over the world. In this study, three additives: (i) supplemental Ca (5 mmol L–1) to nutrient solution, (ii) foliar application of micronutrients (Fe, Mn and Zn at 60, 160 and 110 mg L–1, respectively), and (iii) combination of both of them were evaluated aiming to reduce the negative impact of salt stress on tomato plants cultivated in a soilless culture and improve the internal quality of fruits. The obtained results show that salinity reduced vegetative growth and physiological parameters, fruit yield and its components, and even more lowered fruit market classification of tomatoes. Salinity treatment reduced most of essential macro- and micronutrients in tomato fruit, whilst Na content was increased. Tomato productivity and fruit quality were ameliorated under saline conditions by increasing Ca into nutrient solution and applying a foliar application of micronutrients. A com- bination of both additives ranked the first to alleviate the adverse effects of salinity on tomatoes, followed by solo supplemental Ca into saline nutrient solution. On the other hand, the internal fruit quality of antioxidant compounds, such as vitamin C, lycopene, α-carotene, β-carotene and lutein as well as acidity, total soluble solid and dry matter percent, were increased under saline conditions.

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The Application of a Plant Biostimulant Based on Seaweed and Yeast Extract Improved Tomato Fruit Development and Quality

Biomolecules ◽

10.3390/biom10121662 ◽

2020 ◽

Vol 10 (12) ◽

pp. 1662

Author(s):

Giuseppe Mannino ◽

Cristina Campobenedetto ◽

Ivano Vigliante ◽

Valeria Contartese ◽

Carla Gentile ◽

...

Keyword(s):

Fruit Quality ◽

Tomato Fruit ◽

Antioxidant Properties ◽

Fruit Size ◽

Bioactive Compound ◽

Proximate Analysis ◽

Nutritional Composition ◽

Point Of View ◽

Plant Production

Plant biostimulants are under investigation as innovative products to improve plant production and fruit quality, without resulting in environmental and food contaminations. Here, the effects of the application of Expando, a biostimulant based on seaweed and yeast extracts, on plant productivity, fruit ripening times, and fruit quality of Solanum lycopersicum var. Micro-Tom were evaluated. After biostimulant treatment, a two-week reduction of ripening times and a concomitant enhancement of the production percentage during the earliest ripening times, in terms of both fruit yield (+110%) and size (+85%), were observed. Concerning fruit quality, proximate analysis showed that tomatoes treated with the biostimulant had better nutritional composition compared to untreated samples, since both the quality of unsatured fatty acids (C16:3ω3: +328%; C18:2ω6: −23%) and micronutrients essential for human health (Fe: +14%; Cu: +21%; Zn: +24%) were increased. From a nutraceutical point of view, despite strong changes in bioactive compound profile not being observed, an increase of the antioxidant properties was recorded in fruits harvested by plants treated with the biostimulant (2,2’-azino-bis(3-ethylbenzothiazoline-6-sulphonic acid (ABTS): +38%; 2,2-diphenyl-1-picrylhydrazyl (DPPH): +11%). In conclusion, the biostimulant application was able to reduce the ripening times and fruit size, while slightly increasing nutritional and nutraceutical values, leading to more marketable tomato fruits.

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Characterization of tomato growth and fruit quality under foliar ammonium sprays

Open Agriculture ◽

10.1515/opag-2017-0055 ◽

2017 ◽

Vol 2 (1) ◽

Cited By ~ 1

Author(s):

Mohammad Kazem Souri ◽

Sara Dehnavard

Keyword(s):

Plant Growth ◽

Ammonium Sulfate ◽

Fruit Quality ◽

Foliar Application ◽

Tomato Fruit ◽

Nitrogen Concentration ◽

Titratable Acidity ◽

Soluble Solids ◽

Quality Factors

AbstractThis study was done to evaluate the effects of foliar application of ammonium sulfate on growth and fruit quality of tomato plants under hydroponic culture system. Over four months of tomato plant growth, plants were sprayed once per week with different concentrations of ammonium sulfate (0, 50, 100 and 200 mM), as well as with 50 mM every second day. Foliar application of ammonium sulfate led to reductions in many growth and quality parameters, and higher ammonium concentrations exerted greater reductions. Number of leaves, fresh weight of shoots, percentage of leaf dry weight and fruit yield were negatively associated with the treatment with ammonium sulfate. However, leaf nitrogen concentration, fruit diameter and fruit length increased significantly by the application of ammonium. Fruit quality factors were also affected by ammonium sulfate spray treatments. The maximum pH, titratable acidity and total soluble solids (TSS) were obtained from the lowest (50 mM) weekly application of ammonium sulfate. The results indicate that foliar application of ammonium in moderate concentrations could have beneficial effects on plant growth and quality of tomato fruit.

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Nondestructive Quality Evaluation of Tomatoes

HortScience ◽

10.21273/hortsci.33.3.544c ◽

1998 ◽

Vol 33 (3) ◽

pp. 544c-544

Author(s):

A. Hakim ◽

A. Purvis ◽

E. Pehu ◽

I. Voipio ◽

E. Kaukovirta

Keyword(s):

Quality Evaluation ◽

Tomato Fruit ◽

Quality Attributes ◽

Internal Quality ◽

Attractive Alternative ◽

Fluorescence Techniques ◽

Nondestructive Quality ◽

Alternative Techniques ◽

Evaluation Techniques

Both external and internal quality of fruits such as tomatoes can be evaluated by different methods, but all most all of the methods are destructive. For this reason, there is a need to reassess some of the alternative techniques. Nondestructive quality evaluation is an attractive alternative. The principles of different nondestructive quality evaluation techniques such as optical, physical, and fluorescence techniques applied to tomato fruit is explained. Successful application of these techniques that could be used for evaluation of different quality attributes are illustrated. The advantages of nondestructive quality evaluation techniques are that they are very fast, easy, labor- and time-intensive, and inexpensive. These techniques could also be useful to evaluate the quality of other vegetables.

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Efficacy of Zinc Foliar Application from Different Sources on Productivity and Fruit Quality of Wonderful Pomegranate trees

Arab Universities Journal of Agricultural Sciences ◽

10.21608/ajs.2020.22511.1153 ◽

2020 ◽

Vol 0 (0) ◽

pp. 0-0

Author(s):

Ramy Amer ◽

Nazmy Abdelghany ◽

Laila Haggag ◽

Noha Mansour ◽

Abdallah Korayem

Keyword(s):

Fruit Quality ◽

Foliar Application ◽

Different Sources

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FOLIAR APPLICATIONS OF ZINC, IRON AND MANGANESE INFLUENCE THE PLANT GROWTH AND FRUIT QUALITY OF PAPAYA CV. RED LADY

Journal of Experimental Biology and Agricultural Sciences ◽

10.18006/2020.8(5).551.557 ◽

2020 ◽

Vol 8 (5) ◽

pp. 551-557

Author(s):

Gurjot Singh Pelia ◽

◽

A K Baswal ◽

Keyword(s):

Plant Growth ◽

Fruit Quality ◽

Foliar Application ◽

Ascorbic Acid Content ◽

Titratable Acidity ◽

Fruit Weight ◽

Soluble Solids ◽

Total Carotenoids ◽

Heavy Soil

Prevalence of heavy soil is a major problem for fruit cultivation under Punjab conditions consequently leading to deficiency of several micro-nutrients including zinc (Zn), iron (Fe), and manganese (Mn) which adversely affects the growth and productivity. In this view, a study was planned to investigate the effect of foliar applications of zinc sulphate (ZnSO4), iron sulphate (FeSO4), and manganese sulphate (MnSO4) on vegetative growth, reproductive growth and fruit quality of papaya cv. Red lady. Plants sprayed with ZnSO4 (0.4 %) exhibited significantly highest plant height, plant girth, number of leaves, petiole length; initiated an earliest flowering and fruiting; and improved fruit quality viz., fruit weight, fruit length, titratable acidity, soluble solids concentrations, ascorbic acid content, total phenols content, and total carotenoids content as compared with the control and all other treatments. In conclusion, foliar application ZnSO4 (0.4 %) significantly improved plant growth and fruit quality in papaya cv. Red lady.

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New Insights of Potassium Source Impacts as Foliar Application on the Yield and Fruit Quality of Barhee Date Palms

Middle East Journal of Agriculture Research ◽

10.36632/mejar/2021.10.4.88 ◽

2021 ◽

Keyword(s):

Fruit Quality ◽

Foliar Application ◽

Date Palms

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Effect of boron nutrition on nutrient uptake and fruit quality of tart cherry in Eastern Hungary

International Journal of Horticultural Science ◽

10.31421/ijhs/17/1-2./943 ◽

2011 ◽

Vol 17 (1-2) ◽

Author(s):

P. T. Nagy ◽

J. Nyéki ◽

M. Soltész ◽

T. Szabó ◽

Z. Szabó

Keyword(s):

Nutrient Uptake ◽

Fruit Quality ◽

Foliar Application ◽

Sour Cherry ◽

Early Spring ◽

Prunus Cerasus ◽

Tart Cherry ◽

Full Bloom ◽

Year Effect

Effect of the foliar boron (B) application on nutrient uptake and fruit quality of tart cherry (Prunus cerasus L.) was investigated from 2008 to 2009 on mature four favourite Hungarian tart cherry cultivars like ‘Oblacsinszka’, ‘Érdi bôtermő’, ‘Újfehértói fürtös’ and ‘Petri’. Tart cherry trees grown in Eastern Hungary (Újfehértó) on an acidic sandy soil with low B content. Trees were treated with B by foliar application (0.5% B) at full bloom and untreated with B served as a control. B sprays strongly affected on B content of inflorescences. However, B sprays had no consistent effect on summer leaf B status. In our experiment stronger year effect was observed at leaf B status than flower B status. The effectiveness of early spring boron applications are limited and mostly affected the flower B status only. Moreover, treatments had inconsistent effect on studied fruit inner parameters. Monosaccharides, vitamin C and organic acid contents of sour cherry were stronger affected by cultivars than applied treatments.

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