Fluorescência da clorofila a e liberação de O2 em diferentes variedades de feijão (Phaseolus vulgaris) e soja (Glycine Max(L.)Merr.) após aplicação de sulfato de amônio
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2006-11-25
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Universidade Federal de Goiás
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The productivity of vegetables is influenced by weather, physiology and genetics associated by photosynthesis, by the division of photoassimilated, and by the fixation of N. The analysis of fluorescence of clorophyll allows the study of the characteristics related with the capability of absorption and transference of the luminous energy in the chain of electron transport.
The aim of the present research was to test three varieties of kidney bean and three varieties of soy bean influenced by nitrogen in the exchanges of O2 and the fotochemical efficiency (Ef), using techniques of emission of fluorescence and O2 envolved during photosynthesis, comparing each other.
The determinated variants were: minimum fluorescence (F0), maximum fluorescence (Fm), terminal fluorescence (Ft), variable fluorescence (Fv), efficiency quencher (Eq) and fotochemical efficiency (Ef). The O2 envolved during photosynthesis was avaliated. The plants were submitted to the recommended level of N and the determinations of fluorescence emission (F0, Fm, Ft, Fv, Fv/Fm) and the O2 envolved during photosynthesis were realized one day after the application of NH4+ like ammonium sulfate.
Related to fluorescence there was not difference between the varieties of kidney bean and soy bean. When it was analised the application of NH4+ it was observed that there was difference in the statistic of soy bean.
It was observed the O2 envolved during photosynthesis in the variety of kidney bean Pérola ( 1,50 mol de O2 m –2 s –1) was greater than the other and in the variety of soy bean Monsoy ( 1,58 mol de O2 m –2 s –1) was greater than the other.
Additional index terms: O2 evolution, Phaseolus vulgaris, Glycine Max, fluorescence, fotochemical efficiency, quencher efficiency.
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SILVA, K. P. Fluorescência da clorofila a e liberação de O2 em diferentes variedades de feijão (Phaseolus vulgaris) e soja (Glycine Max(L.)Merr.) após aplicação de sulfato de amônio. 2006. 46 f. Dissertação (Mestrado em Ciências Biológicas) - Universidade Federal de Goiás, Goiânia, 2006.