Abstract
Summary Plants of Sinapis alba show several characteristics of light- and shadow plants when cultivated under two different light intensities. Changing plants from weak to strong light conditions the rate of photosynthesis increases to a value three times higher than under weak light conditions within a period of five days. The increase of photosynthesis is correlated with an increase of the content of ferredoxin. The different rate of photosynthesis seems to correspond with the variability of the photosynthetic unit. Under strong light conditions smaller chlorophyll antennae are formed while their number of electron transport chains is highly increased.
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