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...
Excised apical stem tips (2-5 mm) of grape cultivars grew well
on Murashige and Skoog's (1962) medium for tobacco callus. Additions
of glycine were not essential but gave a slight stimulus to growth.
Naphthalene acetic acid slightly reduced growth rates but reductions
were not statistically significant. Kinetin and coconut milk...
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....
Fucus distichus L. Powell zygotes were used to investigate
cell wall synthesis and development and to construct a model of
cell wall structure.
Alginate synthesis was investigated. Zygotes were cultured
in seawater containing ¹⁴C-bicarbonate. Alginate represented
12%, 37%, and 1.7% of the label recovered from whole zygotes,
wall, and cytoplasm,...