HETEROBLASTIC DEVELOPMENT IN PLANTS
139
direct investigation of the effect of various nutrients on heteroblastic
development. (For a recent summary of this work see Allsopp, 1963.)
a. Culture Conditions. Under the culture conditions adopted, with a
light intensity of 100 foot candles at the level of the cultures, the nutriFIG. 3. Marsilea drummondii. Sporeling after 6 weeks in 3% glucose medium.
Successive leaves are numbered. X 5.40. (From Allsopp, 1952.)
tion of the Marsilea sporelings was largely heterotrophic, for although
they would grow well in the presence of a suitable organic carbon source,
in the absence of an organic nutrient, growth was almost entirely
suppressed.
139
direct investigation of the effect of various nutrients on heteroblastic
development. (For a recent summary of this work see Allsopp, 1963.)
a. Culture Conditions. Under the culture conditions adopted, with a
light intensity of 100 foot candles at the level of the cultures, the nutriFIG. 3. Marsilea drummondii. Sporeling after 6 weeks in 3% glucose medium.
Successive leaves are numbered. X 5.40. (From Allsopp, 1952.)
tion of the Marsilea sporelings was largely heterotrophic, for although
they would grow well in the presence of a suitable organic carbon source,
in the absence of an organic nutrient, growth was almost entirely
suppressed.