Plants, terrestrial boron

Terrestrial plants, especially nuts and some fruits and vegetables, are rich sources of boron (Table 29.3). Honey is another good source of boron, and concentrations up to 7.2 mg/kg dry weight have been reported (Nielsen 1986). Boron concentrations are also elevated in marine plants, zooplankton, and corals, but are low in hsh and certain marine invertebrates (Table 29.3). No data were found on boron levels in terrestrial mammalian wildhfe. The average daily intake of boron in humans ranges between 1 and 25 mg however, populations residing in areas of the western... 

Table 29.4 Boron Toxicity to Some Terrestrial Plants...

Most bore waters include high concentrations of at least one of the following chemical contaminants (Table 1) lithium (Li), boron (B as H3BO3), arsenic (As), hydrogen sulphide (H2S), mercury (Hg), and sometimes ammonia (NH3). If released into a river or lake, these contaminants can potentially damage aquatic life, terrestrial plants, and/or human health. The disposal of highly saline bore waters can also have an adverse effect on water quality. 

Boron accumulates in both aquatic and terrestrial plants but it does not seem to biomagnify in the food chain. Boron does not biomagnify in aquatic food chains and has low potential to accumulate in aquatic organisms, as judged by studies in the San Joaquin River, California,... 

---