Irrigation regimes and bio-stimulant application effects on yield and morpho-physiological responses of strawberry

In the Mediterranean region of Turkey, strawberry production is a vital part of the agricultural sector, providing high rates of employment and farm income. Optimizing water application an effective cultivation practices are of considerable importance in improving strawberry yield. In this study the response of strawberry a cultivar (Fragaria ananassa Duch. cv. Rubygem) to irrigation regimes and bio-stimulant (seaweed extract) use were investigated, by evaluating the yield and morpho-physiological parameters under high tunnel conditions in the Mediterranean environment. The amounts of irrigation water applied were 0.50, 0.75, 1.00 and 1.25 times the water surface evaporation, measured by a standard Class A pan, and the corresponding regimes were denoted as Ir50, Ir75, Ir100, and Ir125, respectively. There was a significant decrease in total berry yield and number of berries in the Ir50 irrigation regime. The maximum total berry yield was attained at Ir75 in both applications (585.7 g/plant and 521.9 g/plant under bio-stimulant and control applications, respectively). However, the results of Ir75, Ir100 and Ir125 did not reveal any significant yield benefit. The bio-stimulant application provided a significant, 17% increase, in berry yield. The stomatal conductance and leaf water potential were reduced as irrigation application rates decreased. Conversely, stomatal conductance and leaf water potential were statistically higher, 41 µmol·m-2·s-1 and 0.5 bar, respectively, after the use of the bio-stimulant, as it alleviated the negative effects of water stress. Bio-stimulant application also significantly increased fruit nitrogen content by approximately 14%. In conclusion, considering the irrigation regimes of strawberries grown under high tunnels in the Mediterranean environment, water use is recommended at around 274 mm (Ir75), along with bio-stimulant application for optimal yield. © 2018 Korean Society for Horticultural Science.Firat University Scientific Research Projects Management Unit: FBA-2016-5542This study was supported by the Coordination Unit of the Scientific Research Projects of the Çukurova University, project FBA-2016-5542, “Effects of Irrigation Regimes and Bio-stimulant on Yield and Morpho-Physiological Responses of Strawberry in High Tunnel Conditions”. The authors thank Dr Paul F. Reich (Paul.Reich@wdc. usda.gov), Geographer, Soil Science Division USDA-NRCS, USA, for th e English editing

Volatile Compounds of Strawberry Varieties

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Effects of various calcium nitrate application on ester profiles of some strawberry cultivars

Strawberry production is increasing year by year in Turkey and commercial growing is done mostly using foreign cultivars. In our country, breeding programmes using aromatic local cultivars and some new cultivars such as 'Ebru', 'Sevgi' and 'Kaşka' were undertaken. However, the fruits firmness of these cultivars were not found satisfying as commercial ones. Therefore, this research aims to investigate the influence of calcium nitrate applications on the ester profiles of 'Osmanli', 'Camarosa', 'Sevgi', 'Ebru' and 'Kaşka'. For this purpose, the effect of various calcium nitrate Ca(NO3)2 (0 (control), 150, 300 and 450 mL 100 L-1) applications on ester profiles of those cultivars were measured by headspace-solid phase micro extraction-gas chromatography-mass spectrometry (HS-SPME-GC-MS)

Characterization of some fruit quality characteristics and flower type in strawberry

Turkey still uses foreign varieties in strawberry growing and pays money for patent rights for each plant. The market requires strawberry varieties with high yield, large fruit, long storage life and having a good appearance and good taste. For these reasons, we aimed to create an F1 population between cultivar 'Ottoman' (male sterile) and cultivar 'Camarosa' (hermaphrodite), which exhibits many opposite characters to eachother. In addition, we aimed to characterize them with important characters for further genetic studies in strawberry which will provide a transition from classical breeding to a modern one in strawberry. In this study, F1 seedlings and their parents were characterized based on the fruit yield, fruit weight, fruit firmness, sugar (fructose, glucose and sucrose), acid (malic, citric and ascorbic) contents and flower type in 200 F1 seedlings