Ataturk Tea and Horticulture Research Institute

Rize, Turkey

Ataturk Tea and Horticulture Research Institute

Rize, Turkey

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Beris F.S.,Recep Tayyip Erdoğan University | Pehlivan N.,Recep Tayyip Erdoğan University | Kac M.,Recep Tayyip Erdoğan University | Haznedar A.,Ataturk Tea and Horticulture Research Institute | And 2 more authors.
Genetika | Year: 2016

Tea is the most globally consumed drink after spring water and an important breeding plant with high economical value in Turkey. In half a century, various kinds of tea cultivars have been bred in Turkey to improve the quality and yield of tea plants. Since tea reproduces sexually, tea fields vary in quality. Thus, determining the genetic diversity and relationship of the plants to support breeding and cultivation is important. In this study we aimed to determine the genetic diversity of tea cultivars breeding in the Eastern Black Sea coast of Turkey and the genetic relationship between them, to verify whether the qualitative morphological designations of the clones are genetically true by the ISSR markers. Herein, the genetic diversity and relationships of 18 Turkish tea cultivars were determined using 15 ISSR markers with sizes ranging from 250 to 3000 base pairs. The similarity indices among these cultivars were between 0.456 and 0.743. Based on cluster analysis using UPGMA, some of tea cultivars originating from the same geographical position were found to be clustered closely. Our data provide valuable information and a useful basis to assist selection and cloning experiments of tea cultivars and also help farmers to find elite parental clones for tea breeding in the Eastern Black Sea coast of Turkey.


Erturk Y.,Ispir Hamza Polat Vocational School | Ercisli S.,Atatürk University | Haznedar A.,Ataturk Tea and Horticulture Research Institute | Cakmakci R.,Atatürk University
Biological Research | Year: 2010

The effects of plant growth promoting rhizobacteria (PGPR) on the rooting and root growth of semi-hardwood and hardwood kiwifruit stem cuttings were investigated. The PGPR used were Bacillus RC23, Paenibacillus polymyxa RC05, Bacillus subtilis OSU142, Bacillus RC03, Comamonas acidovorans RC41, Bacillus megaterium RC01 and Bacillus simplex RC19. All the bacteria showed indole-3-acetic acid (IAA) producing capacity. Among the PGPR used, the highest rooting ratios were obtained at 47.50% for semi-hardwood stem cuttings from Bacillus RC03 and Bacillus simplex RC19 treatments and 42.50% for hardwood stem cuttings from Bacillus RC03. As well, Comamonas acidovorans RC41 inoculations indicated higher value than control treatments. The results suggest that these PGPR can be used in organic nursery material production and point to the feasibility of synthetic auxin (IBA) replacement by organic management based on PGPR.


Kibar A.K.,Black Sea Agricultural Research Institute | Eken C.,Suleyman Demirel University of Turkey | Guclu S.,Bozok University | Genc T.,Igdr University | Sekban R.,Ataturk Tea and Horticulture Research Institute
Egyptian Journal of Biological Pest Control | Year: 2014

Conidiobolus coronatus is a major opportunistic insect pathogen belongs to order Entomophthorales which is distributed worldwide. Effect of C. coronatus against nymphs of Ricania simulans (Walker) (Recaniidae: Hemiptera) was studied under laboratory and field conditions. In laboratory, three isolates (Cc1, Cc2 and Cc3) of C. coronatus were assessed against nymphs of R. simulans, at a single dose (1x107 conidia mL-1) on tea leaflets. Mortality percentage after a six-day period reached 100% and the median lethal time (LT50) values ranged from 3.19 to 3.66 days. In a field, C. coronatus strain Cc3 was assessed against nymphs of this pest, at a single dose (1x107 conidia mL-1) on apple plants. The LT50 values for nymphs were 4.33 days. Obtained findings suggest that C. coronatus strain Cc3 is a potent entomopathogenic agent that could be included against R. simulans in IPM programs. ©, 2014 Egyptian Society for Biological Control of Pests, All right reserved.


Guclu S.,Atatürk University | Ak K.,Black Sea Agricultural Research Institute | Eken C.,Atatürk University | Eken C.,Ardahan University | And 4 more authors.
Bulletin of Insectology | Year: 2010

Lecanicillium muscarium (Petch) Zare et Gams is a widely occurring entomopathogenic fungus. The effect of L. muscarium against Ricania simulans (Walker) (Rhynchota Ricaniidae) was studied under laboratory and field conditions. In laboratory studies, six isolates of L. muscarium were assessed against nymphs of R. simulans, at a single dose (1 × 107 conidia/ml) on tea leaflets. Mortality percentage caused by L. muscarium isolates after a seven-day period varied from 50.95 to 74.76% and median lethal time (LT50) values ranged from 2.34 to 3.90 days. In a field experiment, L. muscarium strain Lm4 was assessed against nymphs and adults of R. simulans, at a single dose (1 × 107 conidia/ml) on kiwifruit plants. The LT50 values for nymphs and adults of R. simulans were 4.18 days and 6.49 days, respectively. The results of the field study indicated that R. simulans nymphs were more susceptible to the fungus than adults. L. muscarium strain Lm4 could be considered as an environmentally friendly alternative for biocontrol of R. simulans.

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