Results 1 to 10 of about 357,391 (104)

Leaf size estimation based on leaf length, width and shape [PDF]

open access: yesAnnals of Botany, 2021
AbstractBackground and AimsLeaf size has considerable ecological relevance, making it desirable to obtain leaf size estimations for as many species worldwide as possible. Current global databases, such as TRY, contain leaf size data for ~30 000 species, which is only ~8% of known species worldwide.
Julian Schrader   +7 more
openaire   +4 more sources

Optimization of leaf morphology in relation to leaf water status: A theory. [PDF]

open access: yes, 2020
The leaf economic traits such as leaf area, maximum carbon assimilation rate, and venation are all correlated and related to water availability. Furthermore, leaves are often broad and large in humid areas and narrower in arid/semiarid and hot and cold ...
Ding, Junyan   +2 more
core   +2 more sources

A flexible geometric model for leaf shape descriptions with high accuracy [PDF]

open access: yes, 2018
Accurate assessment of canopy structure is crucial in studying plant-environment interactions. The advancement of functional-structural plant models (FSPM), which incorporate the 3D structure of individual plants, increases the need for a method for ...
Coussement, Jonas   +4 more
core   +2 more sources

Section properties of palm petioles, Part 1: The influence of section shape on the flexural and torsional properties of selected palm petioles [PDF]

open access: yes, 2008
Shape factors have been used to calculate the shape efficiency of palm leaf petiole sections in order to understand how palms compensate for the torsional and bending forces put upon them by their environment.
Atherton, MA   +3 more
core   +1 more source

The shape of a long leaf [PDF]

open access: yesProceedings of the National Academy of Sciences, 2009
Long leaves in terrestrial plants and their submarine counterparts, algal blades, have a typical, saddle-like midsurface and rippled edges. To understand the origin of these morphologies, we dissect leaves and differentially stretch foam ribbons to show that these shapes arise from a simple cause, the elastic relaxation via bending that follows either ...
Liang, Haiyi, Mahadevan, L.
openaire   +2 more sources

ANOTHER APPROACH TO LEAF SHAPE COMPARISONS [PDF]

open access: yesTAXON, 1987
SummaryMethods for shape comparisons among groups originally developed in zoological studies are found to be useful in examining variation in leaf shape. These methods (sampling outlines by means of truss networks connecting landmarks or pseudolandmarks, and sheared principal components analysis) take advantage of electronic methods of data capture and
Dickinson, T. A.   +2 more
openaire   +2 more sources

Palisade cell shape affects the light-induced chloroplast movements and leaf photosynthesis [PDF]

open access: yes, 2018
Leaf photosynthesis is regulated by multiple factors that help the plant to adapt to fluctuating light conditions. Leaves of sun-light-grown plants are thicker and contain more columnar palisade cells than those of shade-grown plants.
Gotoh, Eiji   +5 more
core   +3 more sources

Butterfly learning and the diversification of plant leaf shape [PDF]

open access: yes, 2016
Visual cues are important for insects to find flowers and host plants. It has been proposed that the diversity of leaf shape in Passiflora vines could be a result of negative frequency dependent selection driven by visual searching behavior among their ...
Dell'Aglio, DD, Jiggins, CD, Losada, ME
core   +1 more source

Intrinsic Inference on the Mean Geodesic of Planar Shapes and Tree Discrimination by Leaf Growth [PDF]

open access: yes, 2010
For planar landmark based shapes, taking into account the non-Euclidean geometry of the shape space, a statistical test for a common mean first geodesic principal component (GPC) is devised.
Huckemann, Stephan
core   +1 more source

Local expression of expansin induces the entire process of leaf development and modifies leaf shape [PDF]

open access: yes, 2001
Expansins are a family of extracellular proteins proposed to play a key role in wall stress relaxation and, thus, in cell and tissue growth. To test the possible function of expansins in morphogenesis, we have developed a technique that allows transient ...
Cho   +14 more
core   +2 more sources

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