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Articles by H. Ulukan
Total Records ( 5 ) for H. Ulukan
  H. Ulukan
  The objective of this field experiment was to evaluate the effect of humic acid application (2.5 kg ha-1 per plot) on yield components of 18F3 wheat hybrids (Triticum spp.) at four sowing times (St1, St2, St3 and St4) on clay soils of Central Anatolian field conditions in a randomized complete block design with four replications in 1999 and 2001. Genotypes were evaluated for plant height (PH-cm), spike number (SN-no), spikelet number (NSL-no), grain number (GN-no) and 1000-Grain weight (TKW-g). Humic acid (HA) decreased in all yield components in the St2, St3 and St4 dramatically by more than 33.0, 75.0 and 45.0%, respectively. It was observed that separation among the genotypes on the basis of mean values was better under normal than under in any stress factor in this region. Comparison of mean performance under these conditions revealed that the grain number, plant height and spike number were the most sensitive traits followed by rest of them. But, mentioned yield components not always sufficient. They must be supported any kind of soil conditioners such as HA in such regions. Moreover, correlation coefficients findings are being verified that sowing times are crucial importance (esp. first time) and it is being indicated that the most important trait was GN and TKW on the basis of their relationships with other traits. To be able to get higher wheat grain yield under Central Anatolian conditions, all sowing procedures must be done in time, different and soil conditioners (example HA) must be used and proper agronomical precautions must be taken in time and adequately.
  H. Ulukan and M. Ozgen
  This research was carried out to determine if dominant morphological traits can be use instead of the rust resistance tests as marker characters for some agro-morphologic traits both leaf (Puccinia recondita Roberge ex Desmaz. f. sp. tritici.) and yellow rust (Puccinia striiformis Westendorp f. sp. tritici) disease. For this, 13 wheat parent (4 are T. durum Desf. and 9 are T. aestivum L.) were used and three main agro-morphologic traits (Namely, Leaf Colour (LC) (Dark and light green, Dg and Lg, relatively); Auricle Colour (AC) (White and Red, Wh and Re, relatively) and Leaf Waxiness (LW) (Waxy and Non waxy, Wx and Nw, relatively) were investigated at the seedling stage. They were found as dominant and concluded that investigated traits could be used as a morphological marker character for the leaf and yellow rust disease resistance tests under greenhouse conditions without doing complex and risky rust tests. And determined that, these traits may be use effectively without doing the complex rust tests in the limited populations or for the pre-selections. Doing with this, it will be bring a great accuracy, successful, correction and speed to the rust disease studies and provides important and valuable information for the plant breeders and pathologists. In addition, knowing of the resistance type (genetic mechanism etc.) in wheat facilitates it will be make to find out the suit and most appropriate breeding and selection methodology/methodologies.
  H. Ulukan , N. Bayraktar and N. Kocak
  Due to slow growth and weakness of the first development of chickpea (Cicer arietinum L.) plant could not combatted with weeds and easily get caught up by Ascochyta blight (Ascochyta rabiei (Pass) Labr.) disease; esp. under the late sowing and semi-arid conditions, due to effect of biotic and abiotic stress factors, significant yield losses could be arised. To be able to avoid from them is only possible to accelerate the first development of this crop. So, one of the best solutions is to use of “soil conditioner” chemical compounds such as HA at optimum dose. With this aim, it was established in order to find out the optimum dose range of HA. Three doses (D0 = 0 g, D1 = 100 g and D2 = 200 g), four varieties (V1 = Er–99, V2 = Gökçe, V3 = ILC-482 and V4 = Australia) and five yield components (Plant Height (PH), First pod height (FPH), Number of Branches per Plant (NBP), Number of Pods per Plant (NPP) and Number of seeds per pod (NSP) were investigated. Obtained results are: Recommended (Optimum) HA doses and interactions were ranged and found as (V4>V2=V3>V1); (D2>D0=D1); (D1xV4) for the PH and FPH, (D2xV3) for the NBP and (D1xV3) for the NPP, respectively. It was concluded that when the recommended HA dose applied, it was seen that the first development has been clearly accelerated and increased under the semi-arid conditions in terms of investigated traits and cultivars.
  H. Ulukan , N. Bayraktar , A. Oksel , M. Gursoy and N. Kocak
  Due to the slowness growth and weakness of the first developments of chickpea (Cicer arietinum L.), it could not combated with weeds and easiliy caught up by Ascochyta blight (Ascochyta rabiei (Pass) Labr.) disease. Additionally, due to biotic and abiotic stress factors, esp. at the late sowing, important seed yield losses could be happened. To be able to avoid from them is only possible to accelerate of its first development as possible as. So, one of the best solutions to is to use chemical compounds such as Humic Acid (HA) known soil regulator under the semi-arid conditions. With this aim this research was performed in a Randomized Complete Block Design (RCBD) with four replications under semi-arid field conditions during (2008/2009) and (2009/2010) in Turkiye. Two cultivars (V1 = Gokce and V2 = Ispanyol) and four seed imbibition methods (A0 = 0, A1 = Tap Water, A2 = ½ Tap Water + ½ Humic acid (HA), A3 = Full HA, as w/w) and seven yield components Plant Height (PH), Number of Branches per Plant (NBP), Number of Pods per Plant (NPP), First Pod Height (NFP), Number of Seeds per Pod (NSP), Seed Weight per Plant (SWP) and 100-Seed weight (HSW) were investigated. The PH and FPH were affected the A0, the NBP, NPP and NSP were affected the A2 and the SWP and HSW were given the varied but not clear responses according to varieties for all the parameters in A1. The A0 and A1 were encouraged the germination and top soil of the plant but, the A2 to A3 were encouraged root system’s development. It was concluded that the A2 is a promising method which makes the maximum and positive effect to the first development of the chickpea agronomy under the semi-arid conditions.
  M. Gursoy , A. Balkan and H. Ulukan
  Stress (abiotic and biotic) factors reflect and specify the plant morphology and called as “stress” and have negative effect(s) on growth, development, quality, quantity and can reduce average plant productivity by 65 to 87%, depending on the plants and stage(s) and also give various permanent or temporary damage(s) according to length of exposed period, violence/density, developmental stage, age, etc. Researches have revealed that despite the advanced technology levels the fundamental basis of stress have not been understood comprehensively. Firstly taken response(s) has/have not yet fully understood and secondly any “resistance” or “tolerance level of a variety/species” because of their complex structure(s). But, this point is clear that with the help or assistance of “multi-disciplinary” approaches, it will be able to get promising result(s) in near future. This review focuses some of the ecophysiological responses of plants to biotic and abiotic stresses.
 
 
 
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