2007, Volume 1, Issue 1 (Volume 1, Issue 1, January-December 2007)

Comparative effects of some plant growth regulators on the germination of barley and radish seeds under high temperature stress
Kursat Cavusoglu, Kudret Kabar

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Abstract

The effects of gibberellic acid, kinetin, benzyladenine, ethylene, 24-epibrassinolide, triacontanol and polyamines (cadaverine, putrescine, spermidine, spermine), alone or in combinations, on germination and early seedling growth under high temperature conditions of barley and radish seeds were studied. High temperature both delayed and inhibited the germinations of both the species. Only three of the single applications gibberellic acid, kinetin and 24-epibrassinolide could alleviate the effects of high temperature on germination of barley seeds. All the combinations composed of these three growth regulators removed more successfully this adverse effect on germination. High temperature effect on the germination of radish seeds was overcome by all the pretreatments alone or in combinations to varying degrees. Although the mentioned regulators carried on their success on the early growth of barley seedlings, the regulators used for radish had no effect on the seedlings in general.

Keywords: high temperature stress, plant growth regulator, seed germination, seedling growth

Citation: Cavusoglu K, Kabar K. Comparative effects of some plant growth regulators on the germination of barley and radish seeds under high temperature stress. Eurasia J Biosci. 2007;1(1):1-10.

Comparison of antagonisms between abscisic acid and various growth stimulators during germination of barley and radish seeds
Kursat Cavusoglu, Kudret Kabar

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Abstract

In this work, antagonism among abscisic acid preventing seedling growth and germination of barley and radish seeds and gibberellic acid, kinetin, benzyladenine, ethylene, brassinosteroid, triacontanol and polyamines (cadaverine, putrescine, spermidine, spermine) was studied. Although many stimulators mentioned were not able to overcome the radicle elongation preventive effect of abscisic acid, the seeds reached 100% germination in this hormone medium. In the seedlings of barley, only benzyladenine, kinetin and gibberellic acid alleviated abscisic acid inhibition on coleoptile emergence and elongation. As for radish, all the stimulators except triacontanol could not overcome abscisic acid inhibition of hypocotyl elongation, while they promoted hypocotyl emergence. The barrier of abscisic acid on the fresh weight of the seedlings was passed by all the stimulators at varying levels. But, only benzyladenine was partly successful in the case of radish.

Keywords: abscisic acid, germination, Hordeum vulgare, plant growth regulators, Raphanus sativus, seedling growth

Citation: Cavusoglu K, Kabar K. Comparison of antagonisms between abscisic acid and various growth stimulators during germination of barley and radish seeds. Eurasia J Biosci. 2007;1(1):11-21.

An electrophoretic taxonomic study on serum proteins of Acanthobrama marmid,
Leuciscus cephalus, and Chondrostoma regium
Muhittin Yilmaz, H. Ramazan Yilmaz, Ali Alas

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Abstract

In this study, native polyacrylamide gel electrophoresis (Native-PAGE) and sodium dodecyl sulfate-polyacrylamide gel electrophoresis (SDS-PAGE) were applied to the serum proteins of Leuciscus cephalus, Acanthobrama marmid and Chondrostoma regium (Cyprinidae) fish taken from) the Karakaya Dam (Malatya, Turkey). The electrophoregrams showed that there were similarities and differences in the molecular weight (MW) of the serum proteins among the three species. In the Native-PAGE, the total number of serum protein bands of L. cephalus, A. marmid and C. regium were 5, 8, 7, respectively. In the SDS-PAGE, 13 protein bands were obtained in L. cephalus, 11 in A. marmid and 11 in C. regium. In the electrophoregrams obtained from native-PAGE, the MW of the protein bands were found to be different in the fish species except the 80.3 kD protein band which was detected in the three fish species. In the SDS-PAGE, the protein band of 21.7 kD was observed in the three fish species. Protein bands of 63.4, 52.3 and 49.5 kD were present only in L. cephalus and C. regium. On the other hand, it was seen that other protein bands had similar molecular weights.

Keywords: fish, native-PAGE, SDS-PAGE, serum proteins, taxonomy

Citation: Yilmaz M, Yilmaz HR, Alas A. An electrophoretic taxonomic study on serum proteins of Acanthobrama marmid,
Leuciscus cephalus, and Chondrostoma regium. Eurasia J Biosci. 2007;1(1):22-7.

Antimicrobial activities and usage in folkloric medicine of some Lamiaceae species growing in Mugla, Turkey
Nurdan Sarac, Aysel Ugur

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Abstract

In this study; 23 selected plant species belonging to the Lamiaceae family, used in traditional treatments, were collected from different localities of Mugla, dried and extracted with ethanol using the soxhlet extraction apparatus. The antimicrobial activities of the plant extracts on the various test microorganisms, including multiple antibiotic resistant bacteria, were investigated. Antimicrobial activities of the extracts were determined by the disc diffusion method. Test microorganisms were; 7 Gram positive, 7 Gram negative bacteria and Candida albicans. Also different standart antibiotic discs were used for comparison for the inhibition zones. The antimicrobial activities of the ethanolic extracts of Salvia verbenaca, Teucrium chamaedrys ssp. lydium, Teucrium divaricatum ssp. villosum, Teucrium polium, Stachys annua ssp. annua var. annua, Sideritis albiflora, Sideritis leptoclada and Prunella vulgaris demonstrated the inhibition effects against Gram positive bacteria including multiple antibiotic resistant Staphylococcus strains. The ethanolic extract of S. leptoclada was the most effective extract. On the contrary, all of the ethanolic extracts were not effective on Gram negative bacteria and C. albicans. The ethanolic extracts of the plants, which inhibited the bacteria, mostly inhibited the growth of Staphylococcus aureus ATCC 25923, MU 38, MU 44 and Staphylococcus epidermidis. Even the inhibition zone of S. leptoclada on S. aureus ATCC 25923 was greater than the inhibition zone of oxacillin on the same bacteria.

Keywords: antibiotic resistant bacteria, antimicrobial activity, folkloric medicine, Lamiaceae

Citation: Sarac N, Ugur A. Antimicrobial activities and usage in folkloric medicine of some Lamiaceae species growing in Mugla, Turkey. Eurasia J Biosci. 2007;1(1):28-37.

Diversity of the vascular flora of Mt. Zlatar (Southwest Serbia)
Dragica Obratov-Petkovic, Ivana Popovic, Zora Dajic-Stevanovic

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Abstract

The mountain system Starovlaške Planine, which includes Mt. Zlatar, is located at the transition line between the plant-geographical Moesian and the Illyric Provinces. This mountain massif of south-western Serbia has a specific floristic and vegetation composition. The cumulative relationships of the general ecological factors of both pre- and post-diluvium periods have formed special conditions for the development of plant species and communities.The purpose of this investigation was to examine the floristic diversity of the above mentioned region. This is very important for the conservation of flora in Serbia in particular, and the Balkan Peninsula in general. After having collected the plant species, the determination was performed using standard floristic methods. The flora of Mt. Zlatar consists of cca 856 identified species, which taxonomically belong to 92 families and 370 genera. The study of flora indicates that there are 38 significant and rare species and 12 relicts and endemics. According to the plant-geographical analysis, 61 different geoelements were recorded. Based on this data, it was determined that the Moesian Province has the greater impact on the flora on Mt. Zlatar than the Illyric Province.

Keywords: floristic diversity, plant geographic characteristics, Zlatar

Citation: Obratov-Petkovic D, Popovic I, Dajic-Stevanovic Z. Diversity of the vascular flora of Mt. Zlatar (Southwest Serbia). Eurasia J Biosci. 2007;1(1):35-47.