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1

Response of grapevine (Vitis vinifera L.) leaves to different leaf fertilizers under a semi-arid condition

100%

Dilek M. , Sabir A.

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nr 5

EN

Ever-increasing shortage in global agricultural water sources urged the researchers to investigate sustainable strategies for alleviating the negative effects of drought on plants in semi arid or arid regions. In this sense, foliar fertilization gained particular significance as it supports the plant to cope with water shortage. This study was conducted to investigate the leaf physiological response of the grapevine ‘Narince’ to various organic leaf fertilizers. Leaf protein content was also determined to compare treatment effects on nutritional value of grape leaves since the leaves of this cultivar are consumed in various ways. Both stomatal conductance, leaf chlorophyll and protein content increased in response to leaf fertilizers in varying degrees according to the products used. To illustrate, Herbagreen pulverization resulted in the highest stomatal conductance (gs) (324.7 mmol H₂O m- ² s -¹), and was followed by Cropset (323.5 mmol H₂O m- ² s - ¹) while the lowest gs value was obtained from control vines (295.4 mmol H₂O m- ² s - ¹). The highest chlorophyll and protein contents were obtained from ISR 2000 (32.9 mg kg- ¹) and Maxicrop (21.5%) treatments, respectively. Leaf chlorophyll content had a significant positive correlation with leaf protein content when all the observations were pooled. Therefore, the organic leaf fertilizers can be considered as a safe, sustainable and innovative strategies to support plants to cope with drought.

PL

Zwiększające się niedobory źródeł wody dla rolnictwa skłoniły badaczy do analizowania strategii zrównoważonych w celu zmniejszenia negatywnego wpływu suszy na rośliny w regionach półpustynnych lub pustynnych. W tym kontekście, nawożenie dolistne zyskało szczególne znaczenie, gdyż wspiera roślinę w radzeniu sobie z brakiem wody. W doświadczeniu badano reakcję fizjologiczną liści winorośli ‘Narince’ na różne organiczne nawozy dolistne. Określono też zawartość białka w liściach, aby porównać efekty zabiegów na wartość odżywczą liści winogron, gdyż liście tej odmiany są spożywane na różne sposoby. Przewodność szparkowa (gs) oraz zawartość chlorofilu i białka w liściach zwiększały się w reakcji na nawozy dolistne w różnym stopniu, w zależności od użytych produktów, np. sproszkowany Herbagreen dał najwyższy gs (324,7 mmol H₂O m-² s -¹), na drugim miejscu był Cropset (323,5 mmol H₂O m- ² s - ¹) natomiast najniższą wartość gs osiągnięto z kontrolnych winorośli (295,4 mmol H₂O m- ² s - ¹). Największą zawartość chlorofilu i białka osiągnięto, odpowiednio, z zabiegów ISR 2000 (32,9 mg kg- ¹) i Maxicrop (21,5%). Po zebraniu wszystkich danych okazało się, że zawartość chlorofilu w liściach była pozytywnie skorelowana z zawartością białka w liściach. Organiczne nawozy dolistne mogą więc być uważane za bezpieczne, zrównoważone i innowacyjne strategie wspierania roślin podczas suszy.

2

Long-term impact of deficit irrigation on the physiology and growth of grapevine cv. ‘Prima’ grafted on various rootstocks.

100%

Kucukbasmaci A. , Sabir A.

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tom 18

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nr 4

EN

Testing the globally popular grapevine rootstocks for affinity with new grape cultivars or tolerance potential to stress factors like drought is essential for districts where supplemental irrigation is more frequently needed due to the pressures of a global climate change. In this study, a seasonal evaluation of leaf gas exchange, leaf temperature, leaf greenness (chlorophyll content prediction) and vegetative development of Vitis vinifera L. cv. ‘Prima’ grafted to different rootstock genotypes having great variability in drought tolerance, were investigated. The experiment was conducted in a controlled experimental glasshouse on two-year-old soilless grown ‘Prima’ vines grafted on nine rootstocks [44-53 M, 5 BB, 140 Ru, Ramsey (Syn. Salt Creek), 99 R, Saint George (Syn. Rupestris du Lot), 41 B, 1613 C and 420 A]. A long-term deficit irrigation (DI) was imposed before bud break by reducing water supply to 40% of field capacity derived from concurrent measurements of water content of growth medium and maintained until the end of vegetation period. The rootstocks significantly modulated the physiology and vegetative growth of the scion cultivar in varying degrees according to their genetic features. Among them, 140 Ru rootstock found to be more prominent in terms of mitigating the adverse effect of water deficit on physiology and growth of the scion genotype ‘Prima’ as there were no significant difference between deficit and full irrigation treatments for most of parameters investigated. In general, the ‘Prima’ scion performed better when the rootstocks coming from V. berlandieri × V. rupestris pedigree rather than the others including V. berlendieri × V. riparia.

3

Vine growth and yield response of Alphonse Lavallee (V. vinifera L.) grapevines to plant growth promoting rhizobacteria under alkaline condition in soilless culture

61%

Sabir A. , Karaca U. , Yazar K. , Sabir F. K. , Atilla Yazici M. , Dogan O. , Kara Z.

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nr 4

EN

High carbonate content in soil negatively affect plant growth, because the availability of nutrients is restricted due to high pH. The present investigations were carried out to reveal possible alleviating effects of the exogenous root inoculation PGPRs on development and physiology of soilless-grown grapevines cultivated under alkaline stress in controlled glass house. pH of growth medium was increased from 7.5 to the values ranging from 7.9 (control) to 8.1 (A18) according to the bacterial inoculations by NaHCO3 supplementations. Bacteria inoculations did not result in statistically significant differences in pH values of growth media. The bacterial population density found in the rhizosphere of grapevines ranged from 6 × 108 CFU mL−1 (M-3) to 9 × 108 CFU mL−1 (Ca-637). The highest value of shoot thickness was obtained from Ca-637 (5.3 mm), followed by A18 (5.2 mm), while M3 did not significantly affected the shoot thickness. The greatest pruning residue per vine was obtained from A18 treatment (81.5 g), followed by Ca-637 (80.8 g) while the lowest value was determined in control. Vine yield was the greatest with A18 (1128 g) treatment and was followed by Ca 637 (1059 g). Considering the general observations, root inoculation of PGPRs A18 and Ca-637 may be recommended in enhancing bioremediation of alkali growth media.