TY - JOUR
T1 - Vessel origins in Nymphaeaceae
T2 - Euryale and Victoria
AU - Schneider, Edward L.
AU - Carlquist, Sherwin
PY - 1995/11
Y1 - 1995/11
N2 - Metaxylem tracheary elements of roots have differentiation between end walls and lateral walls in both Euryale and Victoria. End walls have narrower, more closely spaced bars and scalariform plates. Primary walls of end walls (and, to a lesser extent, lateral walls) have striations that are thickened primary wall portions orientated in an axial direction. These striations are less common in Victoria than in Euryale. Although secondary wall strands between perforations occur in some dicotyledons, the report of primary wall striations is new; these can be seen with scanning electron microscopy (SEM) but not with light microscopy. Perforations occur irregularly and sometimes sparsely on end walls of tracheary elements of Victoria, but perforations were not observed in Euryale. Thus, Euryale satisfies one criterion for the presence of vessel (end wall different from lateral wall), whereas Barclaya satisfies another (perforations in end walls) and Victoria satisfies both. Vessel origins in Nymphaeaceae are important in illustrating that there may be multiple vessel origins in dicotyledons.
AB - Metaxylem tracheary elements of roots have differentiation between end walls and lateral walls in both Euryale and Victoria. End walls have narrower, more closely spaced bars and scalariform plates. Primary walls of end walls (and, to a lesser extent, lateral walls) have striations that are thickened primary wall portions orientated in an axial direction. These striations are less common in Victoria than in Euryale. Although secondary wall strands between perforations occur in some dicotyledons, the report of primary wall striations is new; these can be seen with scanning electron microscopy (SEM) but not with light microscopy. Perforations occur irregularly and sometimes sparsely on end walls of tracheary elements of Victoria, but perforations were not observed in Euryale. Thus, Euryale satisfies one criterion for the presence of vessel (end wall different from lateral wall), whereas Barclaya satisfies another (perforations in end walls) and Victoria satisfies both. Vessel origins in Nymphaeaceae are important in illustrating that there may be multiple vessel origins in dicotyledons.
KW - angiosperms
KW - aquatic
KW - roots
KW - tracheids
KW - vessel evolution
KW - xylem
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U2 - 10.1016/S0024-4074(95)80005-0
DO - 10.1016/S0024-4074(95)80005-0
M3 - Review article
AN - SCOPUS:0000619582
SN - 0024-4074
VL - 119
SP - 185
EP - 193
JO - Botanical Journal of the Linnean Society
JF - Botanical Journal of the Linnean Society
IS - 3
ER -