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001-es BibID:BIBFORM095583
035-os BibID:(cikkazonosító)1361 (WoS)000675934700001 (Scopus)85110324174
Első szerző:Ezzat, Gaballa Kassem Ahmed (agrár)
Cím:Deficit Irrigation Strategies on Tree Physiological and Chemical Properties: Treatment Effects, Prediction Based Model Analyses and Inter-Correlations / Ahmed Ezzat, Abdel-Moety Salama, Szilárd Szabó, Arshad Abdulkhalq Yaseen, Bianka Molnár, Imre J. Holb
Dátum:2021
ISSN:2073-4395
Megjegyzések:Irrigation is a key factor for different physiological aspects of fruit trees. Therefore, such irrigation protocols that can save water consumption during irrigation and maintain fruit trees productivity are an essential goal especially under semiarid climate conditions. The aim of this 3-year apricot study was to investigate the effect of four deficit irrigation (DI) treatments (control, moderate regulated deficit irrigation: RDIm, severe RDI: RDIs and continuous DI: CDI) on 15 tree physiological properties (chilling requirement?CR, heat requirement?HR, days from end?dormancy until fruit harvest?DEDFH, sum of growing degree days?sGDD, total number of buds?TNB, number of flower buds?NFB, number of vegetative buds?NVB, starting date of flowering?SDF, number of opened flower buds?NOFB, flower bud abscission?FBA, fruit set?FS, seasonal vegetative growth?SVG, fruit number per tree?FNT, fruit weight?FW, fruit yield?FY), and on two tree chemical properties (total soluble carbohydrates?TSC and total proline content?TPC) on apricot cultivars ♭Ninfa' and ♭Canino' in Egypt. Results showed that both DI treatments and cultivars significantly influenced the values of CR, HR, TNB, SDF, NOFB, FS, SVG, FNT, FY, TSC, and TPC. Values of FBA were significantly affected by years and DI treatments, while sGDD by years and cultivars. Values of DEDFH, NFB, and FW were significantly influenced only by cultivars, while NVB only by DI treatments. The RDIm treatment gave the most acceptable values for most measured properties compared to the fully irrigated control treatment. Prediction based model analysis demonstrated that generalized linear models (GLMs) can be predictors for the measured tree properties in the DI treatments. The best goodness-of-fit of the predicted GLMs was reached for HR, NOFB, FS, SVG, FNT, TSC, and TPC. In all the four DI treatments, 22 pair-variables (TNB versus (vs.) NFB, TNB vs. NOFB, TNB vs. NOFB, NFB vs. NOFB, NFB vs. FNT, NFB vs. FY, NFB vs. FW, NOFB vs. SVG, NOFB vs. FNT, NOFB vs. FY, FS vs. FNT, FS vs. FY, SVG vs. FNT, SVG vs. FY, SVG vs. TSC, FNT vs. FY, FY vs. FW, CR vs. TSC, HR vs. TNB, HR vs. NFB, HR vs. FNT, HR vs. FY, and NOFB vs. FBA) correlated significantly in Pearson correlation and regression analyses. Principal component analyses explained 82% of the total variance and PC1, PC2, and PC3 explained 23, 21, and 15% of the total variance and correlated with the HR, TNB, FS, FNT and FY; FBA, SVG, TSC, and TPC; and NFB, NVB and NOFB, respectively, indicating strong connections among tree physiological and chemical properties. In conclusion, DI techniques using moderate water deficits can be managed successfully in apricot production under semiarid Mediterranean climate conditions such as the one in Egypt.
Tárgyszavak:Agrártudományok Növénytermesztési és kertészeti tudományok idegen nyelvű folyóiratközlemény külföldi lapban
folyóiratcikk
chilling requirement
bud number
shoot growth
flowering
fruit set
yield
soluble carbohydrates
proline content
prediction based GLMs
regression analyses
PCA
Megjelenés:Agronomy-Basel. - 11 : 7 (2021), p. 1-34. -
További szerzők:Salama, Abdel-Moety Szabó Szilárd (1974-) (geográfus) Yaseen, Arshad Abdulkhalq (1986-) (Agricultural Engineer) Molnár Bianka Holb Imre (1973-) (agrármérnök)
Pályázati támogatás:Bolyai János Kutatási Ösztöndíj
Egyéb
NKFI K 131478
Egyéb
TÁMOP-4.2.4.A/2-11/1- 2012-0001
TÁMOP
TKP2020-NKA-04
Egyéb
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DOI
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2.

001-es BibID:BIBFORM093928
035-os BibID:(cikkazonosító)341 (WoS)000654309100001 (Scopus)85105797365
Első szerző:Ezzat, Gaballa Kassem Ahmed (agrár)
Cím:Temporal Patterns and Inter-Correlations among Physical and Antioxidant Attributes and Enzyme Activities of Apricot Fruit Inoculated with Monilinia laxa under Salicylic Acid and Methyl Jasmonate Treatments under Shelf-Life Conditions / Ahmed Ezzat, Szilárd Szabó, Zoltán Szabó, Attila Hegedűs, Dorina Berényi, Imre J. Holb
Dátum:2021
ISSN:2309-608X
Megjegyzések:Monilinia laxa causes serious postharvest damage on apricot fruits under shelf-life storage conditions. Plant elicitors of methyl jasmonate (MeJA) and salicylic acid (SA) can reduce this damage, and their research can explain the background of the plant defense physiological processes in M. laxa-infected fruits. The aims of this study were: (i) to evaluate the effect of various concentrations of MeJA and SA on brown rot incidence (BRI) and lesion diameter (LD) of apricot fruits; (ii) to measure the temporal patterns for the effect of 0.4 mmol L?1 MeJA and 2 mmol L?1 SA treatments on BRI, LD and seven fruit measures (fruit firmness (FF), lignin content (LC), total soluble phenol content (TSPC), total antioxidant capacity (TAC) and enzyme activities of PAL, POD and SOD) in treatments of M. laxa-inoculated versus (vs.) non-inoculated fruits over an eight-day shelf-life storage period; and (iii) to determine inter-correlations among the seven fruit measures for MeJA and SA treatments. Both MeJA and SA significantly reduced BRI and LD. LC, FF, TAC, TSPC, as well as SOD and PAL activities in the MeJA and SA treatments were higher than the water-treated control in most assessment days and both inoculation treatments. In both inoculation treatments, the activity of POD in the SA-treated fruits was higher than MeJA-treated and control fruits at all dates. In MeJA vs. SA and inoculated vs. non-inoculated treatments, six variable pairs (FF vs. TSPC, FF vs. TAC, TAC vs. PAL, PAL vs. POD, PAL vs. SOD, and POD vs. SOD) showed significant inter-correlation values. Principal component analyses explained 96% and 93% of the total variance for inoculated and non-inoculated treatments, respectively. In inoculated treatments, both PC1 and PC2 explained 41% of the total variance and correlated with FF, TSPC and TAC and with PAL, SOD and POD, respectively. In non-inoculated treatments, PC1 and PC2 explained 49% and 44% of the total variance and correlated with LC, PAL, POD and SOD and with FF, TSPC and TAC, respectively. It can be concluded that MeJA and SA are useful in the practice to enhance the plant defense system against brown rot by reducing fungal growth and by improving physical and antioxidant attributes (FF, LC, TAC and TSPC) and the activity of defense-related enzymes (PAL, POD and SOD) in apricot fruits during shelf-life storage conditions.
Tárgyszavak:Agrártudományok Növénytermesztési és kertészeti tudományok idegen nyelvű folyóiratközlemény külföldi lapban
folyóiratcikk
brown rot
lesion diameter
lignin
fruit firmness
phenol content
antioxidant capacity
defense related enzymes
Pearson correlation
regression analyses
PCA
Megjelenés:Journal of Fungi. - 7 : 5 (2021), p. 1-24. -
További szerzők:Szabó Szilárd (1974-) (geográfus) Szabó Zoltán (1960-) (kertészmérnök) Hegedűs Attila Berényi Dorina Holb Imre (1973-) (agrármérnök)
Pályázati támogatás:K 131478
OTKA
TÁMOP-4.2.4.A/2-11/1-2012-0001
TÁMOP
TKP2020-NKA-04
Egyéb
Internet cím:Szerző által megadott URL
DOI
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3.

001-es BibID:BIBFORM089332
035-os BibID:(cikkazonosító)8071 (Scopus)85096134949 (WOS)000594158400001
Első szerző:Ezzat, Gaballa Kassem Ahmed (agrár)
Cím:Temporal Changes and Correlations between Quality Loss Parameters, Antioxidant Properties and Enzyme Activities in Apricot Fruit Treated with Methyl Jasmonate and Salicylic Acid during Cold Storage and Shelf-Life / Ahmed Ezzat, Attila Hegedűs, Szilárd Szabó, Amin Ammar, Zoltán Szabó, József Nyéki, Bianka Molnár, Imre J. Holb
Dátum:2020
ISSN:2076-3417
Megjegyzések:The apricot storability is one of the largest challenges, which the apricot industry has to face all over the world; therefore, finding options for prolonging fruit quality during cold storage (CS) and shelf-life (SL) will help to decrease postharvest losses of apricot. The aim of this apricot fruit work was to study the temporal changes and correlations of 10 quality parameters (quality losses, antioxidant properties and enzyme activities) in the postharvest treatments of methyl jasmonate (MeJA) and salicylic acid (SA) under 1 °C CS (7, 14 and 21 days) and 25 °C SL (4 and 8 days after the 21-day CS) treatments. MeJA and SA significantly decreased the quality loss of chilling injury (CI) and fruit decay (FD) at all dates for both storage conditions. MeJA- and SA-treated fruits increased total antioxidant capacity (TAC), total soluble phenolic compounds (TSPC) and carotenoids contents (TCC) at all dates of both storage treatments. In contrast, the ascorbic acid content (AAC) increased only until days 14 and 4 in the CS and SL treatments, respectively. Among enzyme activity parameters, the activities of phenylalanine ammonia-lyase (PAL), peroxidase and superoxide dismutase (SOD) were significantly increased in the MeJA and SA treatments in all dates of both storage treatments. Catalase (CAT) activity increased in the SA and control treatments, while it decreased in the MeJA treatment in both storage conditions. In both the MeJA and the SA treatments, six pair-variables (FD vs. CI, PAL vs. CAT, PAL vs. SOD, TAC vs. SOD, TAC vs. FD, and AAC vs. CI) were significant in Pearson correlation and regression analyses among the 45 parameters pairs. Principal component analyses explained 89.3% of the total variance and PC1 accounted for 55.6% of the variance and correlated with the CI, FD, TAC, TSPC, TCC, PAL and SOD, indicating strong connections among most parameters. In conclusion, MeJA and SA are practically useful and inexpensive techniques to maintain quality attributes of CI, FD, TAC, TSPC, TCC, PAL, POD and SOD in apricot fruit during both CS and SL conditions.
Tárgyszavak:Agrártudományok Növénytermesztési és kertészeti tudományok idegen nyelvű folyóiratközlemény külföldi lapban
folyóiratcikk
apricot
methyl jasmonate
salicylic acid
antioxidant property
enzyme activity
postharvest quality
Megjelenés:Applied Sciences-Basel. - 10 : 22 (2020), p. 1-22. -
További szerzők:Hegedűs Attila Szabó Szilárd (1974-) (geográfus) Ammar, Amin Szabó Zoltán (1960-) (kertészmérnök) Nyéki József (1944-2022) (kertészmérnök) Molnár Bianka Holb Imre (1973-) (agrármérnök)
Pályázati támogatás:NKFI K 131478
Egyéb
Bolyai János Kutatási Ösztöndíj
Egyéb
TÁMOP-4.2.4.A/2-11/1-2012-0001 A2-SZJ-TOK-13-0061
TÁMOP
Thematic Excellence Programme of the Ministry for Innovation and Technology in Hungary (ED_18-1-2019-0028)
Egyéb
Internet cím:Szerző által megadott URL
DOI
Intézményi repozitóriumban (DEA) tárolt változat
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4.

001-es BibID:BIBFORM088524
Első szerző:Ezzat, Gaballa Kassem Ahmed (agrár)
Cím:A comparison of fruit and leaf parameters of apple in three orchard training systems / Ezzat Ahmed, El-Sherif Ali R., Elgear Doaa, Szabó Szilárd, Holb Imre J.
Dátum:2020
ISSN:1392-3196 2335-8947
Megjegyzések:In a two-year study, the effects of three training systems on apple fruit and leaf parameters: 9 fruit yield, 8 physico-chemical and 4 antioxidant capacity related parameters and the relationships among 11 yield quality parameters, of the apple cultivar ♭Royal Gala' were studied. In addition, light penetration into the tree canopy was determined. The investigated three training systems were Oblique Palmette (1250 trees ha-1), Bibaum (1923 trees ha-1) and Slender Spindle (1666 trees ha-1). Light penetration into the tree canopy, fruit number per tree, fruit weight, fruit yield, fruit skin colour, fruit firmness, starch index of fruit, N- and K-contents of leaves as well as ascorbic acid content, total anthocyanins and total antioxidant capacity of fruit indicated significant differences (P < 0.05) amongst the training systems, but the differences were not significant between experimental years. The Bibaum gave the highest values for light penetration into the tree canopy, fruit number per tree, fruit yield, fruit skin colour, starch index of fruit, N- and K-contents of leaves and total anthocyanins, which were significantly different from those of the Oblique Palmette or the Slender Spindle. The Slender Spindle gave the highest values for fruit weight, fruit firmness and total antioxidant capacity, which were significantly different from those of the Bibaum. Fruit of the Oblique Palmette trained trees showed the highest ascorbic acid content, which was significantly different from that of the Slender Spindle but not from the Bibaum. From the 55 correlation pairs of each training system, 27, 17 and 15 were significant at P < 0.05 in the Oblique Palmette, the Bibaum and the Slender Spindle, respectively. Only five correlation pairs were significant in all the three training systems. This study clearly demonstrated that most of the parameters were largely affected by the training systems, which may influence apple growing practices and fruit quality in a given orchard training system.
Tárgyszavak:Agrártudományok Növénytermesztési és kertészeti tudományok idegen nyelvű folyóiratközlemény külföldi lapban
folyóiratcikk
antioxidant capacity
fruit quality parameters
light penetration
plant health status
training system
yield parameters
Megjelenés:Zemdirbyste-Agriculture. - 107 : 4 (2020), p. 373-382. -
További szerzők:El-Sherif, Ali R. Elgear, Doaa Szabó Szilárd (1974-) (geográfus) Holb Imre (1973-) (agrármérnök)
Pályázati támogatás:NKFI K 131478
Egyéb
TÁMOP-4.2.4.A/ 2-11/1-2012-0001 National Excellence Program
TÁMOP
Thematic Excellence Programme of the Ministry for Innovation and Technology in Hungary (ED_18-1- 2019-0028)
Egyéb
Internet cím:Szerző által megadott URL
DOI
Intézményi repozitóriumban (DEA) tárolt változat
Borító:
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