annals-of-botany

Aluminium (Al) toxicity is one of the factors limiting crop production on acid soils and various resistance mechanisms have evolved in plant species. Cell-wall pectin content is generally lower in Al-resistant than in Al-sensitive cultivars, and the degree of methylation of the pectins may play an i

The nectary spur is a characteristic feature of Aeridinae; a large, orchid subtribe displaying diverse pollination strategies.  Stpiczyńska et al. describe and compare its anatomy for a range of entomophilous and ornithophilous species. Structural nectary features shared by Asiatic Ascocentrum and c