Season-associated modifications in symplasmic organization of the cambium in Populus nigra.

ABSTRACT:

Background and aims

Alterations of plasmodesma (PD) connectivity are likely to be very important for plant development. Here, the repetitive division pattern of cambial initials in Populus nigra 'italica' was studied to follow the development of the PD network during maturation. Furthermore, seasonal changes were investigated in order to trace indications for developmental and functional adaptations.

Methods

Cambium samples of P. nigra twigs, collected in summer, autumn and spring, were chemically fixed for transmission electron microscopy. The parameters, PD density (number of PDs per square micrometre cell-wall area) and PD frequency (total number of PDs per average cell-wall area), were determined for radial and tangential cell interfaces deposited in chronological order.

SUBMITTER: Fuchs M 

PROVIDER: S-EPMC2826250 | biostudies-literature | 2010 Mar

REPOSITORIES: biostudies-literature