منابع مشابه
Plant Leaf Recognition
Research on automatic leaf classification has been active since 2000. Lots of hand-crafted features have been proposed, ranging from shape based, to statistical texture and margin related [2] [3] [1]. Also generic computer vision object recognition features, such SIFT[32] and HOG[33], are studied for this problem. Most of such manually engineered features achieve excellent accuracy on clean ima...
متن کاملEvolutionarily stable leaf area production in plant populations.
Using an analytical model, it was shown that for a given amount of nitrogen in the canopy of a stand (N(T)), there exists an evolutionarily stable leaf area index (ES-LAI), and therefore an evolutionarily stable average leaf nitrogen content (n(ES)(av);n(ES)(av) =N(T)/ES-LAI), at which no individual plant in the stand can increase its photosynthesis by changing its leaf area. It was also shown ...
متن کاملBMC Plant Biology
Background: The EXO (EXORDIUM) gene was identified as a potential mediator of brassinosteroid (BR)-promoted growth. It is part of a gene family with eight members in Arabidopsis. EXO gene expression is under control of BR, and EXO overexpression promotes shoot and root growth. In this study, the consequences of loss of EXO function are described. Results: The exo loss of function mutant showed ...
متن کاملPlant Biology Select
Most organisms have daily rhythms set by environmental conditions such as light. Plants in particular are very sensitive to changes in their environment, responding to such changes with altered growth and development. At a molecular level, changes in the environment are detected and processed through an internal circadian clock. At the core of all circadian clocks is a transcriptional feedback ...
متن کاملPlant Biology Select
Plant biologists have long sought the identity of florigen, the signal that travels from the leaves to the shoot apical meristem to induce flowering. Two recent reports conclude that the elusive florigen is FLOWERING LOCUS (FT) in the model plant Arabiodpsis thaliana (Corbesier et al., 2007) and that its homolog in rice is Hd3a (Tamaki et al., 2007). Although FT is known to promote flowering an...
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ژورنال
عنوان ژورنال: Science
سال: 2008
ISSN: 0036-8075,1095-9203
DOI: 10.1126/science.319.5869.1459c