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Effects of juglone on growth, photosynthesis, and respiration

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Abstract

The impacts of juglone on plant growth and several other physiological functions were evaluated in this study. Juglone inhibitedLemna minor growth, chlorophyll content, and net photosynthesis at treatments between 10 and 40μM. Soybean leaf disks vacuum infiltrated with as little as 10μM juglone had reduced photosynthesis. Oxygen evolution by chloroplasts isolated fromPisum sativum was inhibited by juglone with an I50 of 2μM. Micromolar treatments of juglone stimulated oxygen uptake in mitochondria isolated fromGlycine 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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This study was supported by National Science Foundation grant STI-8902066.

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Hejl, A.A.M., Einhellig, F.A. & Rasmussen, J.A. Effects of juglone on growth, photosynthesis, and respiration. J Chem Ecol 19, 559–568 (1993). https://doi.org/10.1007/BF00994325

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  • DOI: https://doi.org/10.1007/BF00994325

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