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Home » Archive » 2013

TDK conference 2013

Viability measurments on the seeds of the royal hungarian veterinarian college
Tóth Kata Mária - year 2
SzIU, Faculty of Veterinary Science, Department of Botany
Supervisors: Cserhalmi Dániel, Endrédi Anett

Abstract:

Due to the increasing human effect, more and more species are getting close to extiction. The disappearance of a species can lead to the extinction of other ones and degradation of the habitat as these biotopes are quite complex systems. Considering these factors and the increasing extiction rate the protection of the species came to the focus in the last few years. The knowledge of plant biology and reproduction seems to be essential for the effective protection work, what helps to predict the succession patern and the regeneration ability. The regeneration of a plant community always base on the natural seed bank,and it can be described with the seed viability and germination ability.

The aim of the research is the seed viability measurement of four species belong to the Fabaceae family (Astragalus cicer, Astragalus contortuplicatus, Astraglus glycyphyllos, Trifolium arvense). The main experiments were focused on the seed longevity and its dependence on the seed weight. The decreasing of hardseedness was also tested.

The seeds were collected from the herbarium of the Rolyal Hungarian Veterinary College and the Institute of Botany and Ecophysiology (Gödöllő). Fresh seed were collected for control samples. Altogether 3 seed samples (1918, 1925, 1940) were used for Astragalus cicer, 3 (1914, 1918, 2011) for Astragalus contortuplicatus, 3 (1908, 1909, 1915) for Astragalus glycyphyllos and 9 (1897, 1900, 1910, 1913, 1922, 1929, 1943, 2012 from two locations) for Trifolium arvense. Germination was tested in Petri dishes with blotting paper. For the harseedness test scarificated seeds were used as well.

The germination rate was 9.6% for Astragalus contortuplicatus seeds of 1914, 11,1% for Astragalus cicer seeds of 1925, and 10% for Astragalus glycyphyllos seeds of 1917. For the other samples only turgid seeds were recorded and there was no germination detected for Trifolium arvensis seeds at all. Differences for the thousand seed weight was also detected which can be an explanation for the different germination rates.

The preliminary results show that there are species in the Fabaceae family which can keep the germination ability after 90 years, and the germinated embryos can develop and stay viable. This can lead to new questions to be answered and a possibility to use other species for the same measurements.



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