Sulfur Dioxide Inhibition of Translocation in Bean Plants 1
AUTOR(ES)
Teh, Kwang Ho
RESUMO
Exposure of the source leaf of bean (Phaseolus vulgaris L. cv. Black Valentine) for 2 hours to 2.9 microliters per liter SO2 inhibited the net photosynthetic rate an average of 75% and, simultaneously, the translocation rate an average of 45%. Calculations indicated that the experimentally determined translocation rates from SO2-stressed leaves were lower than were the rates expected on the basis of the observed reductions in photosynthesis. It is inferred that, under SO2 stress, the phloem-loading system becomes a major limiting step in controlling the translocation rate.
ACESSO AO ARTIGO
http://www.pubmedcentral.nih.gov/articlerender.fcgi?artid=426151Documentos Relacionados
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