Benzoxazolin-2-(3H)-one (BOA) has been tested in many plants species, but not in soybean (Glycine max). Thus, a hydroponic experiment was conducted to assess the effects of BOA on soybean photosynthesis. BOA reduced net photosynthetic rate, stomatal conductance, and effective quantum yield of PSII photochemistry without affecting intercellular CO2 concentration or maximal quantum yield of PSII photochemistry. Results revealed that the reduced stomatal conductance restricted entry of CO2 into substomatal spaces, thus limiting CO2 assimilation. No change found in intercellular CO2 concentration and reduced effective quantum yield of PSII photochemistry revealed that CO2 was not efficiently consumed by the plants. Our data indicated that the effects of BOA on soybean photosynthesis occurred due to the reduced stomatal conductance and decreased efficiency of carbon assimilation. The accumulation of BOA in soybean leaves reinforced these findings. and Obsahuje bibliografii
Louis Cazamian develops Henri Bergson’s concise remarks, which show humour as a special sort of comical transposition of language. Cazamian stresses that humour is based on transposition, which is inevitably conscious, and he is concerned with the division of humour into four different species according to the modes of transposition. Cazamian focuses especially on the complexity of humour and its impact. Even if a certain view of the world and life, that is, a kind of “matter” of humour, is obviously suggested by the mechanism of transposition, that is, by the “form” of humour, it is impossible to determine any universal rule describing the relationship between matter and form. In that sense Cazamian emphasizes the indefinability of humour, and points to the indeterminability of the humorous effect. These arguments demonstrate the essential influence that many important themes of Bergson’s aesthetics and philosophy have had on Cazamian’s conception of humour, a conception that proves to be integrally Bergsonian.