Effects of juglone on growth, photosynthesis, and respiration
1993
Hejl, A.M. | Einhellig, F.A. | Rasmussen, J.A.
The impacts of juglone on plant growth and several other physiological functions were evaluated in this study. Juglone inhibited Lemna minor growth, chlorophyll content, and net photosynthesis at treatments between 10 and 40 micromolar. Soybean leaf disks vacuum infiltrated with as little as 10 micromolar juglone had reduced photosynthesis. Oxygen evolution by chloroplasts isolated from Pisum sativum was inhibited by juglone with an I50 of 2 micromolar. Micromolar treatments of juglone stimulated oxygen uptake in mitochondria isolated from Glycine max. These data suggest perturbations of chloroplast and mitochondrial functions may contribute to plant growth reductions observed in juglone-mediated allelopathy.
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