leaf anatomy of 27 species of potentilla l. (rosaceae), representing 9 sections and four related genera, especially tylosperma botsch., schistophyllidium (juz. ex fed.) ikonn., drymocallis fourr. ex rydb., and sibbaldia l. from iran were studied using light microscopy. the most outstanding characters of blade and midrib were measured. the result revealed a number of taxonomically important char...

Diaphragmatic neurilemmoma (schwannoma) is an extremely rare tumor that is often discovered incidentally. Even when diagnosed, patients are commonly advised only to attend regular follow-up appointments as conventional tumorectomy is enormously invasive and confers relatively few benefits. Here, we report a unique case of a diaphragmatic neurilemmoma with concomitant symptomatic cholecystolithi...

This paper presents a method for simulating color aging of leaves. Our technique is inspired by natural processes. We consider the flow of fluid in the leaf, and its evaporation through stomata. To model this, we use three maps describing the stomata and venation distributions and the fluid flow, respectively. We conduct a simulation that uses these maps to update the amount of fluid sourced in...

The effect of light on the stomatal resistance of abaxial and adaxial leaf surfaces of snap beans (Phaseolus vulgaris L.) was studied in the growth chamber and in the field. The adaxial stomata required more light to open than the abaxial stomata; the abaxial stomatal apertures were still about 50% open at 1% full sunlight and light-induced closure was never observed under daytime field conditi...

To investigate whether leaves of plane trees (Platanus orientalis) are damaged by traffic pollution, trees from a megacity (Mashhad, Iran) and a rural area were investigated. Soil and air from the urban centre showed enrichment of several toxic elements, but only lead was enriched in leaves. Leaf size and stomata density were lower at the urban site. At the urban site leaf surfaces were heavily...

Root hair formation, stomata development on hypocotyls and trichome formation on leaves in Arabidopsis represent three model systems for epidermal patterning in plants that involve a common set of genes or corresponding homologues. The resulting pattern and the developmental readout are, however, strikingly different. Trichomes become regularly spaced on the leaf surface. Root hairs and stomata...

Abstract Background Stomata analysis using microscope imagery provides important insight into plant physiology, health and the surrounding environmental conditions. Plant scientists are now able to conduct automated high-throughput of stomata in data, however, existing detection methods sensitive appearance training images, thereby limiting general applicability. In addition, only generate boun...

This study was conducted to investigate the effect of altitudinal gradients on  the anatomy of Salvia limbata C.A.Mey. (Lamiaceae). . The S. limbata species were collected from their natural habitats from various regions of West Azerbaijan province in Iran. The thickness of cuticle, collenchymas, phloem, xylem and pith of stem and leaf thickness were measured. Moreover, width, length and number...