Copper-induced chlorosis in Becium Homblei (De Wild.) Duvign. & Plancke

Summary Becium homblei (De Wild.) Duvign. & Plancke can grow on copper-contaminated soil and may accumulate high levels of the metal in its leaves. It is normally resistant to the toxic effects of copper, but some plants may show signs of chlorosis. This was shown to be due to interference by copper with iron accumulation in chloroplasts. Treatment of the soil with iron and nitrogen reduced copper uptake and re-established high levels of iron concentration in chloroplasts and also restored normal levels of chlorophyll. re]19720626