Influence of abiotic stresses on the content of net energy in winter wheat (Triticum aestivum) grains
2000
Hnilicka, F, | Novak, V. (Ceska Zemedelska Univ., Prague-Suchdol (Czech Republic)) | Blaha, L. | Zamecnik, J. | Ottova, M.
Net energy content was studied in grains of representative cultivars of wheat: Astella, Olga, Plodna, Patria and Zdar. Grains were taken from plants cultivated under controlled glasshouse conditions and under conditions with mutual combination of three representative abiotic stresses - low pH, high temperature and drought. The grains from stressed conditions had 11.06 % lower values of combustion heat. The individual cultivars of wheat did not react to combustion of abiotic stress equally. The values of measured combustion heat are different. In that case to some extent occurred influence of genotype, i.e. the ability of a certain cultivar to adapt towards unsuitable life conditions. Energetic value of plant material is the function of genotype and it depends on conditions of external surroundings. That is why we suppose, that combustion heat values can to some extent represent one of the limiting factors for finding out of adaptability of certain cultivars for abiotic stresses. Besides the genotype and the variants of experiment, the influence of the year of experiment and provenance of seeds participated in the amount of rich in energy matters accumulated into wheat grains, too. Abiotic stresses during growth and development of seeds influence basal metabolic paths and majority of seed characters. Yield of grains was lower with the stressed variant compared with the control variant for 5.9 g per pot.
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