Under defined cultural conditions, large populations of zygotes
of the brown algae Fucus vesiculosus L. and F. distichus L. Powell
synchronously form a cell wall shortly after fertilization. Intact cell
walls, free of cytoplasm and maintaining shape properties of early
stages of embryo development, have been isolated from these zygotes....
Abies lasiocarpa (Hook.) Nutt. (sub-alpine fir) trees of comparable
vigor growing in eastern British Columbia were studied in
order to determine the effects of cork bark disease on phellogen and
vascular cambium activity.
Diseased trees form hard deeply fissured rhytidome several
inches thick over large areas of the bole when...