TY - JOUR
AU - IMAICHI,, RYOKO
AB - Abstract The morphogenesis of the leaf sheath was studied in Botrychium strictum and B. virginianum of subgenus Osmundopteris. In the two species, the leaf primordium is initiated on the lowest part of a ridge which is formed by partial growth of the shoot apex. The leaf primordium first grows to cover the shoot apex almost entirely except for a slit-like opening. The opening is formed by the frontal rim of the growing leaf primordium, i.e. the leaf margin, and the rear part of the shoot apex. As the leaf grows, the leaf margin elongates and takes a reverse V-shape. On both lateral edges of the leaf margin, marginal growth occurs to form the lobes of the leaf sheath. Such marginal growth and a small amount of growth on the uppermost portion of the sheath is involved in the leaf sheath formation in B. cirginianum, while only marginal growth takes place in B. strictum. The leaf sheath of Botrychium virginianum, in comparison to that of B. strictum, has a morphogenesis which is more similar to the completely covering leaf sheath of subgenera Botrychium and Sceptridhim. Based on the morphogenesis of the leaf sheath, systematic relationships in subgenus Osmundopteris are discussed Botrychium virginianum, B. strictum, subgenus Osmundopteris, leaf ontogeny, leaf sheath formation, scanning electron microscopy, light microscopy This content is only available as a PDF. © 1989 Annals of Botany Company
TI - Early Leaf Development and Leaf Sheath Formation of Botrychium strictum and B. virginianum (Ophioglossaceae)
JF - Annals of Botany
DO - 10.1093/oxfordjournals.aob.a087739
DA - 1989-02-01
UR - https://www.deepdyve.com/lp/oxford-university-press/early-leaf-development-and-leaf-sheath-formation-of-botrychium-ZM7N6ymRRU
SP - 249
EP - 256
VL - 63
IS - 2
DP - DeepDyve
ER -