Cataphyll Ontogeny in Pinus Lambertiana

Sacher, Joseph A.

doi:10.1002/j.1537-2197.1955.tb11096.x

Cited by 21 publications

(6 citation statements)

References 25 publications

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“…Foliar development in Dacrydium taxoides has been studied by Lee (1952), and Sacher (1955) de-scribed eataphyll ontogeny in Pinus lambertiana. Additional information on the ontogeny of leaves in this group of plants is necessary before broad comparisons within the group as well as with angiospermous plants can be made.…”

Section: Foliar Ontogeny In Podocarpus Macrophyllus With Special Refmentioning

confidence: 99%

Foliar Ontogeny in Podocarpus Macrophyllus, With Special Reference to Transfusion Tissue

Griffith

1957

American J of Botany

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Section: Foliar Ontogeny In Podocarpus Macrophyllus With Special Refmentioning

confidence: 99%

Foliar Ontogeny in Podocarpus Macrophyllus, With Special Reference to Transfusion Tissue

Griffith

1957

American J of Botany

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“…Al-Sherifi (1952) and Sacher (1955) found that leaves of several species of the Cupressaceae have the typical gymnosperm pattern of leaf development: an initial phase of apical growth, followed by a prolonged second phase in which the apical meristem is replaced with a nearly basal intercalary meristem. Al-Sherifi (1952) and Sacher (1955) found that leaves of several species of the Cupressaceae have the typical gymnosperm pattern of leaf development: an initial phase of apical growth, followed by a prolonged second phase in which the apical meristem is replaced with a nearly basal intercalary meristem.…”

Section: Discussionmentioning

confidence: 99%

“…Leaf development in J. chinensis 'Torulosa variegata' appears to be typical of junipers in general. Al-Sherifi (1952) and Sacher (1955) found that leaves of several species of the Cupressaceae have the typical gymnosperm pattern of leaf development: an initial phase of apical growth, followed by a prolonged second phase in which the apical meristem is replaced with a nearly basal intercalary meristem. The juniper stem establishes files of cells below the apex that extend down the stem, resulting in subtending leaves coming from common cell files and sharing any sectors.…”

Section: Discussionmentioning

confidence: 99%

Chimeric patterns in Juniperus chinensis ‘Torulosa Variegata’ (Cupressaceae) expressed during leaf and stem formation

Korn

2002

American J of Botany

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Juvenile leaves of the variegated Hollywood juniper, Juniperus chinensis 'Torulosa Variegata', have sectorial chimeras of variable widths and lengths. Sectors extend over several nodes often as small as 1/24 the circumference of the leaf. Other chimeras appear as light green to yellow streaks but are actually internal, dark green corpus sectors often occupying less than 1/20 of the cross sectional area of a leaf. On the basis of the sizes of these two types of sectors, there seems to be ideally about 168 founder cells comprising 63 tunica cells and 105 corpus cells; 49 of the latter are contiguous with the tunica and 66 are located deeper in the corpus. Similarly, sectoring in axillary branches of original chimeric sprays have the same types of sectoring. It is hypothesized that the outer rings of founder cells form two arcs of 12 cells around the stem apex, one for each of two leaves at a node of the decussate shoot, of a circumference of about 50 cells.

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“…In T. dolabrata, however, even the development of two buds side by side in one axil was observed occasionally. DISCUSSION -Whereas the histology of the shoot apex ofconifers always has received considerable attention, only a few investigations have been made on the ontogeny of axillary buds in conifers (Koch, 1891;Cross, 1939;Sterling, 1945;Sacher, 1955;Seeliger, 1955;Guttenberg, 1961). This may be partly due to the difficulty of encountering different developmental stages of axillary bud initiation at a shoot tip of most conifers since normal axillary buds are formed in the axils of only a few leaves.…”

Section: Sequoia Sempervirens-unlikementioning

confidence: 99%

Some Cases of Delayed or Induced Development of Axillary Buds From Persisting Detached Meristems in Conifers

Fink

1984

American J of Botany

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In the apparently “empty” axils of the needles of Taxus baccata, Sequoia sempervirens, Sequoiadendron giganteum, Cryptomeria japonica, Thuja occidentalis, and Thujopsis dolabrata persisting detached meristems were found, which are derived from superficial layers of the apical eumeristem. In T. baccata delayed development of minute axillary buds occurs from these meristems after 1–4 yr on the intact plant. In the other conifers, development of additional axillary buds from these meristems was induced by natural frost damage or by artificial pruning and disbudding. The discovery of these detached meristems is discussed with regard to the regenerative capacity of the conifers in comparison to other plants.

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Cataphyll Ontogeny in Pinus Lambertiana

Cited by 21 publications

References 25 publications

Foliar Ontogeny in Podocarpus Macrophyllus, With Special Reference to Transfusion Tissue

Foliar Ontogeny in Podocarpus Macrophyllus, With Special Reference to Transfusion Tissue

Chimeric patterns in Juniperus chinensis ‘Torulosa Variegata’ (Cupressaceae) expressed during leaf and stem formation

Some Cases of Delayed or Induced Development of Axillary Buds From Persisting Detached Meristems in Conifers

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