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    MAINTENANCE OF POSTHARVEST QUALITY OF BLACKBERRY (Rubus fructicosus L.) FRUITS THROUGH SALICYLIC ACID AND CaCl2 IMMERSIONS
    (WYDAWNICTWO AKAD ROLNICZEJ W LUBLINIE, 2019) Sabir, Ferhan; Sabir, Ali; Ozcelik, Sevil; Kucukbasmaci, Alper
    Blackberries (Rubus spp.) have significant nutraceutical properties, providing phenolic compounds for the consumers. These compounds are useful to human health due to their high antioxidant activity. However, most blackberries destined for fresh markets become unmarketable in 2 to 3 days due to decay and leakage, because they have thin and fragile skin. The present study was aimed to investigate the effect of salicylic acid (SA) and calcium chloride (CaCl2) on extending the postharvest quality and bioactive compounds of blackberry during refrigerated storage. Blackberry fruits cv. 'Jumbo' were dipped in 2% CaCl2 or in 2.0 mM salicylic acid (SA) for 10 min. Total soluble solids contents, titratable acidity, pH, ascorbic acid contents, total phenolics contents, and total antioxidant activity were investigated initially on 4th, 7th, or 10th day (d) of storage. Changes in fresh weight, titratable acidity, ascorbic acid and total phenol contents were markedly delayed by both treatments. Berries treated with 2 mM SA or 2% CaCl2 exhibited markedly better visual quality during the storage period. Considering the overall findings, this study revealed that postharvest SA or CaCl2 applications maintained the storage-life and conserved the valuable marketing features of blackberries over 10 d in cold storage, presumably due to their inhibitory effects on fruit senescence.
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    Vine growth, yield, berry quality attributes and leaf nutrient content of grapevines as influenced by seaweed extract (Ascophyllum nodosum) and nanosize fertilizer pulverizations
    (ELSEVIER SCIENCE BV, 2014) Sabir, Ali; Yazar, Kevser; Sabir, Ferhan; Kara, Zeki; Yazici, M. Atilla; Goksu, Nihal
    Environmental stress factors such as drought, salinity, and temperature extremes can reduce the yield of major crops and limit agricultural production worldwide. Therefore, research into developing sustainable methods to alleviate such stresses should be a priority. However, experimental studies to detect evidence and the effects of macro- and micro-element deficiencies in grapes are still insufficient to match necessity of clear knowledge to solve problems related with vineyard nutrition practice under stress conditions. This study was thus conducted on the investigation of the physiological, growth, mineral acquisition, yield and quality responses of grapevine, grown on alkaline soil, to seaweed extract (Ascophyllum nodosum) and nanosize fertilizer over two years. Leaf investigations revealed that the existence of nano-size Ca-based fertilizer led to remarkable enhancements in foliar development and chlorophyll concentration of the vines cultivated on alkaline soil. Seaweed also enhanced the leaf Zn chlorophyll content of the grapes. Most of macro- and micro-elements determined across the vines were in, or near, normal levels, except for Zn which varied around questionable levels. The treatments, particularly nano-fertilizer, considerably increased the Zn acquisition. Certain berry characteristics and the yield also increased with especially nano-fertilizer alone or with sea weed (A. nodosum) plus nano-fertilizer treatment. Overall investigations revealed that nano-fertilizer had particular contribution to improvement of vine growth, yield, berry quality attributes and leaf nutrient content of grapevines (cv. 'Narince') grown under alkaline soil condition. Therefore this product would be recommended to use for alleviating the adverse effects of such abiotic stress condition for sustainable grape production. (C) 2014 Elsevier B.V. All rights reserved.