Ecological Importance of Insects in Selenium Biogenic Cycling

Table 1

Peculiarities of Se accumulation by plants and effect on insect pollinators in conditions of high Se status [37].

Parameter	Hyperaccumulators	Secondary accumulators	Nonaccumulators
Biological accumulation level^a	100–1000	3–10	<1
Predominant plant organ of maximum selenium accumulation	Flowers	Leaves	Leaves^b
The main chemical form	MeSeCys	Se^+6, Se^+4, SeCys, MeSeCys	Se^+6, Se-proteins^b
Toxicity to insects-pollinators	+/−	+	++^b

acorresponds to Se plant/Se soil ratio, ^bin conditions of Se-fortification.