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TRACHEARY OCCLUSION IN FRONDS OF PTERIDIUM AQUILINUM (L.) KUHN SHOWING APOSPORY
Author(s) -
SHEFFIELD E.,
BELL P. R.,
LAIRD S.
Publication year - 1982
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.1469-8137.1982.tb03264.x
Subject(s) - pteridium aquilinum , frond , tracheid , botany , biology , fern , xylem
S ummary The occlusion of tracheids in aposporous fronds of Pteridium aquilinum attached to parent plants was found to account for the failure of dye to penetrate to the leaf extremities. The agent responsible for this blockage was seen as an electron‐opaque layer covering the walls and areas of overlap between tracheids. The aposporous behaviour of attached leaves is attributed to the discontinuation in supply of some influence from the parent plant which results from the tracheary occlusion observed.