Aras, S. | Arıkan, Ş. | İpek, M. | Eşitken, A. | Pırlak, L. | Dönmez, M.F. | Turan, M.

Article | 2018 | Acta Physiologiae Plantarum40 ( 6 )

Iron chlorosis in the calcareous soils is one most important stress factors worldwide that limits photosynthesis and decreases fruit yield and quality. Certain soil rhizobacteria produce organic compounds such as plant acids and they may reduce the soil rhizosphere pH and affect ferric chelate reductase (FC-R) activity in root. However, there is no knowledge regarding changes in organic acids content and FC-R activities of leaf due to rhizobacterial root inoculation. Therefore, the efficiency of six plant growth promoting rhizobacteria (PGPR) were tested on apple cv. Braeburn on M9 and MM106 rootstocks. The results of the experiment . . . showed leaf organic acid contents, iron quantity of soil, root and leaf and root and leaf FC-R activity were significantly affected via rhizobacteria applications in apple plants. In MM106 and M9, there was a remarkable increase in Fe in M3 inoculated soil by 95 and 89%, respectively, compared to control. Average increases in citric, malic, malonic, butyric and lactic acid in the leaf were obtained from rhizobacterial root inoculations of 25.1, 21.8, 29.6, 18.0 and 18.2% in Braeburn/MM106, respectively. In Braeburn/M9, MFDCa1 application increased all organic acid concentrations compared to the control. MFDCa2 treatment caused the maximum leaf FC-R activity in Braeburn on M9 and MM106 (60.9 and 50.3 nmol Fe+2 g-1 FW h-1, respectively) while the least values were determined in the control (33.5 and 29.9 nmol Fe+2 g-1 FW h-1, respectively). This study showed the bacterial strains tested in our study may be used as a biofertilizer instead of Fe fertilizers. © 2018, Franciszek Górski Institute of Plant Physiology, Polish Academy of Sciences, Kraków Daha fazlası Daha az

Sahin, U. | Ekinci, M. | Ors, S. | Turan, M. | Yildiz, S. | Yildirim, E.

Article | 2018 | Scientia Horticulturae240 , pp.196 - 204

To understand the effects of salt and drought stress factors on the growth, physiological and biochemical responses of cabbage (Brassica oleracea var. capitata), a greenhouse experiment was conducted with different levels of salinity (S0: tap water, S1: tap water containing extra 75 mM dose of NaCl, and S2: tap water containing extra 150 mM dose of NaCl), irrigation quantity (W0: Full-irrigation, W1: irrigation with 80% of the W0, and W2: irrigation with 60% of the W0), and their combinations. The results showed that antioxidant activity, proline and sucrose contents increased under both salinity and drought stress as well as their . . .combination. Moreover, oxidative damage indicating parameters such as electrical leakage (EL), malondialdehyde (MDA), and hydrogen peroxide (H2O2) increased as well. Increased level of salinity and drought stress caused a decrease in chlorophyll content (SPAD), leaf relative water content (LRWC), stomatal conductance (gs), net photosynthetic activity (An), intercellular CO2 content (Ci) and transpiration rate (Tr). We observed that proline and sucrose contents could not stimulate the growth of plant under increased levels of salinity and drought stress. Individual drought and salt stress conditions have negatively affected plant growth including the shoot, root fresh and dry weights when applied separately. On the other hand, the combination of drought and salinity enhanced the adverse effects of each stress factor. © 2018 Elsevier B.V Daha fazlası Daha az

Ozdemir, G. | Kitir, N. | Turan, M. | Ozlu, E.

Article | 2018 | Acta Scientiarum Polonorum, Hortorum Cultus17 ( 3 ) , pp.91 - 100

A present study was conducted to determine the impacts of organic and organo-mineral fertilizers on total phenolic, flavonoid, anthocyanin and antiradical activities of Okuzgozu (Vitis vinifera L. cv.) grapes. Study treatments included organic fertilizers (green fertilizer (vetch), green fertilizer (barley), green fertilizer (vetch + barley), farmyard manure, bactoguard, lifebac NP, humanica) and organo-mineral fertilizers (bac-tolife quality organo, bactolife high organo, bactolife high organo, bactolife super organo power). The control treatment did not receive any application. The organic, and organo-mineral fertilizers applicati . . .ons positively influenced the total phenolic, flavonoid and anthocyanin productions, and antiradical activity (DPPH). The maximum total phenolic production was significantly higher under Bactolife Super Organo Power (785.49 µg GAE/mg in pulp) application, followed by those under bactolife high organo 5-5-5 (780.40 µg GAE/mg in pulp). The total flavonoid production in berry skin (34.26 µg QUE/mg), pulp (137.00 µg QUE/mg) and seed (23.52 µg QUE/mg) were the highest under the bactolife super organo power whereas the antiradical activities (DPPH) of berry pulp and seed were at the maximum level under the bactolife quality organo treatment. Total anthocyanin content of berry skin and pulp of Okuzgozu grape cultivar was the highest under the organic humanica. © by Wydawnictwo Uniwersytetu Przyrodniczego w Lublinie Daha fazlası Daha az

Köse, C. | Güneş, A. | Kaya, Ö. | Kıtır, N. | Turan, M. | Şahin, Fikrettin

Article | 2018 | Erwerbs-Obstbau60 , pp.3 - 10

This study was conducted to determine the effects of plant growth promoting bacteria (PGPR) and boron (Bio-B) on the plant freeze injury, antioxidant enzyme activity and fruit yield of grapevine cultivar. The experimental plot was a completely randomized design with 5 replicates. As a trial model Bio-B and control were used as fertilizer agent. Bio-B fertilizer has been applied in different ways as soil?+ foliar, soil and foliar application methods to grapevine plants. Data through 2 years trials results showed that the use of Bio-B significantly decreased freeze injury and increased antioxidant enzyme activity of grapevine leaf. Th . . .e highest damage rate at control group occurred with -20?°C and 94.89% ratio. In the same temperature degree at grape plant, the damage ratio of the Bio-B application from soil decreased by 21.55%; the application from leaf by 25.53% and with the application from soil?+ leaf by 26.24%. In addition to this, compared with control, in the CAT, POD and SOD enzyme activities increases occurred with the ratios as 28.57%, 22.05% and 39.25%, respectively. Generally, as results of this study under field conditions, Bio-B fertilizer application decreased freeze injure and increased antioxidant enzyme activity of the grapevine plant. © 2018, Springer-Verlag GmbH Deutschland, ein Teil von Springer Nature Daha fazlası Daha az

Ekinci, M. | Örs, S. | Turan, M. | Yildirim, E.

Review | 2018 | Yuzuncu Yil University Journal of Agricultural Sciences28 ( 2 ) , pp.254 - 265

Due to the major environmental stress factors that limit crop production today, finding suitable areas where the plant can reach the normal crop potential in cultivation has become very difficult. Abiotic stress is a significant factor in decreasing the agricultural production as compared to the other stress factors. Abiotic stress factors, such as drought, salinity, high temperature, low temperature, flooding, radiation, pollutants, oxidative stress, wind and lack of nutrients in the soil, can negatively affect the growth, development and productivity of plants. Among the compounds with different gas contents, external application . . .of nitric oxide (NO) to plants has gained more importance in recent years. NO plays a protective role against different abiotic stresses such as metal toxicity, temperature, drought and salinity, as well as regulatory roles in improvement of germination and seedling growth. This paper discusses the effects of NO applications on abiotic stress conditions such as drought, salinity, high and low temperature and heavy metals on plants. © 2018, Centenary University. All rights reserved Daha fazlası Daha az

Arıkan, Ş. | Eşitken, A. | İpek, M. | Aras, S. | Şahin, M. | Pırlak, L. | Turan, M.

Article | 2018 | Journal of Plant Nutrition41 ( 17 ) , pp.2141 - 2150

The effects of Alcaligenes 637Ca, Agrobacterium A18, Staphylococcus MFDCa1, MFDCa2, Bacillus M3 and Pantoea FF1 were tested on peach cv. ‘Elegant Lady’ on GF677 and Nemaguard rootstocks. Average increases in citric, malic, oxalic, butyric and fumaric acid in the leaf were obtained from rhizobacterial root inoculations of 33.1, 17.5, 21.7, 26.5, and 44.7% in Elegant Lady/Nemaguard, respectively. FF1 showed the highest FC-R activity in the roots of Nemaguard (112.4 nmol FW gr-1 hr-2) and GF677 (162 nmol FW gr-1 hr-2). The highest FC-R activity in the leaf was with MFDCa2 in Elegant Lady/Nemaguard (57.1 nmol FW gr-1 hr-2) and 637Ca in . . .Elegant Lady/GF677 (87.9 nmol FW gr-1 hr-2). PGPR strains used in this study expressed increased leaf organic acid content, FC-R activity in the roots and leaf, increased active Fe content in the leaf, and possessed a great potential for the improvement of iron availability to plants. © 2018, © 2018 Taylor & Francis Group, LLC Daha fazlası Daha az

Erdogan, U. | Turan, M. | Ates, F. | Kotan, R. | Çakmakçi, R. | Erdogan, Y. | Tüfenkçi, S.

Article | 2018 | Communications in Soil Science and Plant Analysis49 ( 14 ) , pp.1731 - 1738

The objective of this study was to evaluate the effects of seven nitrogen (N2)-fixing and/or phosphorus (P)-solubilizing and siderophore-producing microorganism based bio-fertilizers in single and triple strain combinations isolated from the acidic rhizospheric soil of native tea, grapevine, and wild red raspberries. As a result of this study, bacterial efficiency was found to be variable and depended on the bacterial strains and evaluated growth parameters. Plant growth-promoting rhizobacteria (PGPR) has improved macro- and micro-nutrient concentrations in grapevine leaves, and stimulated plant growth. Triple inoculation and single . . . inoculation based bio fertilizers were found to stimulate overall plant growth, including shoot and leaf weight, main shoot length, leaf ground index, chlorophyll, nitrogen, zinc and iron content of grapevine cv ‘Italy’. Bio-fertilizers increased the nutrients such as nitrogen, zinc and iron concentrations and consequently increased the chlorophyll content of the leaves. © 2018, © 2018 Taylor & Francis Daha fazlası Daha az