Nectar secretion is complicated to study from the ultrastructural point of view because it is a
dynamic process involving many tissues simultaneously. dures, although this problem can …

The adverse consequences of pollution impact on terrestrial ecosystems have been under
careful investigation since the beginning of the twentieth century. Several thousand case …

All animal-pollinated plants must solve the problem of attracting pollinators while remaining
inconspicuous to herbivores, a dilemma exacerbated when voracious larval-stage …

Buckwheat cultivation has been declining worldwide since the last two to three decades
because of low and erratic yield. Several physiological and ecological traits appear to be …

ABSTRACT Common buckwheat (Fagopyrum esculentum Moench) is widely cultivated but
the floral biology of this auto-incompatible distylous species was poorly documented. This …

Plants growing in heavy-metal-rich soils can accumulate metals into their nectar. Nectar
chemical composition can alter foraging behavior of floral visitors (including pollinators and …

Abstract Background and Aims The mechanisms of floral nectar production in buckwheat
(Fagopyrum esculentum, Polygonaceae), a distylous pseudo-cereal, have received …

Several phylogeographic studies in northern Mesoamerica have examined the influence of
Pleistocene glaciations on the genetic structure of temperate tree species with their southern …

Factors that contribute to variation in nectar sugar composition, nectar concentration and
volume have been a central concern in studies of pollinator assemblages in angiosperms. In …

The adaptiveness of distyly has been typically investigated in terms of its female function,
specifically pollen receipt. However, pollen loads on stigmas can only provide moderate …