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CESSATION OF VASCULAR ACTIVITY CORRELATED WITH APOSPOROUS DEVELOPMENT IN PTERIDIUM AQUILINUM (L.) KUHN
Author(s) -
SHEFFIELD E.,
BELL P. R.
Publication year - 1981
Publication title -
new phytologist
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 3.742
H-Index - 244
eISSN - 1469-8137
pISSN - 0028-646X
DOI - 10.1111/j.1469-8137.1981.tb04096.x
Subject(s) - pteridium aquilinum , frond , botany , biology , regeneration (biology) , bracken , chemistry , fern , microbiology and biotechnology
SUMMARY Apospory has been found to occur on leaves of Pteridium aquilinum still attached to parent plants, although previous work had indicated that detachment was a prerequisite for regeneration. It is clear, however, that such recrudescence occurs only in leaves where active vascular flow has ceased, and which are also in contact with a moist surface. It is proposed that the cessation of an active vascular supply has an inductive effect. The inability of mature fronds to behave aposporously is attributed to the presence of a thick cuticle external to the superficial cells, which is thought to prevent the exchange of metabolites between frond and medium.