نتایج جستجو برای: leaf venation pattern

تعداد نتایج: 431191  

Journal: :Genes & development 2006
Ben Scheres Jian Xu

Particularly in the fall, plant leaves demand attention as examples of the beauty of nature. Around that time, anyone can pick them up and have a close look at the variety in venation patterns. For a considerable time, biologists and mathematicians went one step farther, trying to find regularities in these patterns and rules behind them. Vein organization can be classified in several general p...

2017
Austin William Jones

Angiosperm leaves are extremely variable in form while predominantly maintaining the function of the primary photosynthetic organ of the plant. Changes in leaf form can result from myriad physiological processes which may be influenced by ecology, physical stimuli, phylogeny, or other factors. In studying the development of divergent leaf forms among closely related species, conserved morpholog...

2003
W. R. Okie Mark Rieger

Prunus ferganensis (Kost. & Riab) Kov. & Kost, is closely related to cultivated peach, P. persica (L.) Batsch, but is distinguished by very long, unbranched leaf veins which turn and run parallel to the leaf margin at the edge of the leaf. Also, the pits have longitudinal grooves. Otherwise the tree and fruit of this species (or sub-species) resemble those of our familiar commercial peach. P. f...

Journal: :Pattern Recognition 2017
Sue Han Lee Chee Seng Chan Simon Mayo Paolo Remagnino

Plant identification systems developed by computer vision researchers have helped botanists to recognize and identify unknown plant species more rapidly. Hitherto, numerous studies have focused on procedures or algorithms that maximize the use of leaf databases for plant predictive modeling, but this results in leaf features which are liable to change with different leaf data and feature extrac...

1999
PETER BECKER T. TYREE

because of slow growth rates caused by an inefficient transport system and low leaf photosynthetic capacity, gymnosperm seedlings are weak competitors with angiosperms in productive habitats. We measured component (shoot, leaf, and root) and whole-plant hydraulic conductances of sapling-sized tropical plants growing on nitrogen-poor white sand in Borneo. After accounting for size effects, there...

2014
Mónica G. Larese Pablo M. Granitto

In this work we propose an automatic method aimed at classifying five legume species and varieties using leaf venation features. Firstly, we segment the leaf veins and measure several multiscale morphological features on the vein segments and the areoles. Next, we build a hybrid consensus of experts formed by five different automatic classifiers to perform the classification using the extracted...

Journal: :Iraqi journal of science 2022

The research was aimed tostudy themorphological and anatomical characteristics as well habitatand geographical distributionof speciesPeltariaangustifolia DC., This study indicated that the plant specimens are perennial glabrous herbs, distinguished by presence of distinct basal cauline leaves, simple corymb inflorescence. Flowers perianth consists four obovate sepals, spathulate petals, with he...

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