Levels of (±) Abscisic Acid and Xanthoxin in Spinach under Different Environmental Conditions 1

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RESUMO

The levels of the growth inhibitors(+)-abscisic acid and xanthoxin were determined in the long day plant spinach (Spinacia oleracea L. cv. Savoy Hybrid 612) grown under different environmental conditions. When plants were transferred from light to darkness, the (+)-abscisic acid level always decreased, whereas the xanthoxin content did not change. The (+)-abscisic acid content was higher in plants grown under low than under high relative humidity.

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