phyllotaxy


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Related to phyllotaxy: alternate phyllotaxy

phyllotaxy

the arrangement of leaves on a stem.
Collins Dictionary of Biology, 3rd ed. © W. G. Hale, V. A. Saunders, J. P. Margham 2005
References in periodicals archive ?
It explains the impact of the tree phyllotaxy and the sling size on the protection of the populations and their reproduction, against climatic factors that can create a specific microclimate (Tab.2).
By subtracting the information entropies of these subclasses from that of original training example set, ID3 derives the information gain of the feature "angiosperm." In a similar way, the information gains for testing "phyllotaxy" and "shape of leaf" can be obtained, respectively.
In the Pooideae in contrast, the distichous phyllotaxy of the leaves continues into the inflorescence; the distichy of the primary inflorescence branches thus appears to be a synapomorphy for Pooideae (Evans, 1940).
The architectural routine builds the 3-D plant architecture from organ lengths and diameters, the phyllotaxy angles, insertion angles, and deviation angles.
These principles were hypothesized to stem from physical and biological constraints and were reflected in mathematical regularities such as phyllotaxy, allometry, morphology, branching patterns, and numerous other aspects of whole organism anatomy and physiological functioning.
Differences may also be found in phyllotaxy, intemode length, anthocyanin pigmentation, rooting ability, or wood structure (Goebel, 1898; Rumball, 1963; Frydman & Wareing, 1973).
For example, individual trees or clones often show changes in leaf size and shape, phyllotaxy, rooting ability, and plant architecture (Schaffalitzky de Muckadell 1954, Brink 1962, Kozlowski 1971, Fortanier and Jonkers 1976, Poethig 1990).
Further study is needed to determine whether the variation in some other traits is discrete or continuous (e.g., the size and shape of leaflets, phyllotaxy, length of stem and internodes, and degree of condensation of the inflorescence).
Distribution of imported 14C in developing leaves of eastern cottonwood according to phyllotaxy. Planta 111:95-112.
External changes may include a shift from leaf to bract initiation, more rapid initiation of those bracts, a change in phyllotaxy, and/or elongation ("bolting") of the subtending axis.
Thus, "Floral Organization" (Chapter 2) deals with the origin of sepals and petals (no strict definition is possible: it seems to be a matter of function leading to convergence), stamens and carpels, and the evolutionary aspects of floral phyllotaxy; "Floral Construction" (architecture, gestalt) (Chapter 3) deals with radial vs.