plants
Zinc hyperaccumulation in Thlaspi caerulescensas a chemical defence against herbivory Thlaspi caerulescens is one of several plant species known to accumulate heavy metals in excess of 2% of their above ground plant biomass. The reasons for hyperaccumulation are unknown, but several studies conclude that it may be a plant chemical defence. This has been of interest to biologists because these metals are usually toxic. The accumulation of these metals may serve as a model for coevolution. We examined the effects of zinc hyperaccumulation in Thlaspi on Xanthomonas campestris and found that the plants containing zinc thrived when inoculated with this bacteria, while plants not containing zinc showed signs of There are several wild plant species that have the ability to accumulate high quantities of heavy metals in their above ground biomass, up to three percent or more. Many of these plants are found in the Brassicaceae family throughout Europe and the British Isles. These plants thrive on mineral outcrops with calamine and serpentine soils rich with high levels of zinc, cadmium, and nickel (Baker et al, 1994). Several theories have been advanced on the
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Some common words found in the essay are:
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Approximate Word count = 1199
Approximate Pages = 5 (250 words per page double spaced)
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