Leaf senescence constitutes the last stage of leaf development in plants and proceeds through a highly regulated program in order to redistribution of microand macro-nutrients from the senescing leaves to the developing/growing plant organs. Initiation and progression of leaf senescence is accompanied by massive sequential alterations at various levels of leaf biology including leaf morphology ...

Objective: The aim of this study was to develop and validate an image analysis method for quantitative analysis of barakol content in Senna siamea leaf extract. Methods: TLC-densitometric and TLC-image analysis methods were developed, validated, and used for quantitative analysis of Senna siamea leaf extract. The results obtained by these two different quantification methods were compared by pa...

Recent studies have demonstrated that grapevine (Vitis spp.) leaf shape can be quantified using digital approaches which indicate phylogenetic signal in leaf shape, discernible patterns of developmental context within single leaves, and signatures of local environmental conditions. Here, we extend this work by quantifying intra-individual, intraspecific, and interspecific variation in leaf morp...

1 Abstract In this project, I will analyze the boundary curves of leaf images to recognize and classify leaves by species. The input leaf boundary curve will be decomposed into a wavelet bases, which will then be compared to the decomposition of all samples in the database, and the closest matches will be returned. The inner-distance measure will also be computed and compared at multiple scales...

The sizes and shapes (physiognomy) of fossil leaves are widely applied as proxies for paleoclimatic and paleoecological variables. However, significant improvements to leaf-margin analysis, used for nearly a century to reconstruct mean annual temperature (MAT), have been elusive; also, relationships between physiognomy and many leaf ecological variables have not been quantified. Using the recen...