Influence of lead on the chlorophyll content and on initial steps of its synthesis in greening cucumber seedlings [activity of delta-aminolevulinic acid dehydratase]
1985
Burzynski, M. (Wroclaw Univ., Wroclaw (Poland). Dept. of Plant Physiology)
Lead uptake by young cucumber (Cucumis sativus L.) seedlings growing in 10 exp. (-4) and 10 exp. (-3) MPbC12 solution caused delta-aminolevulinic acid dehydratase and the chlorophyll content in the cotyledons. Lead mainly accumulated in the roots (ca 93-96% of Pb uptake) and hypocotyls (ca 4-6%) whereas only trace Pb amounts were found in the cotyledons when 10 exp. (-3) M solution was used. The direct effect of lead on the examined steps of chlorophyll synthesis cannot, however, be ruled out
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