In the preceding communication' it was shown that phenylmercuric acetate sprayed upon detached leaves brings about closure of the stomata and thereby diminishes the diffusion of water from the leaves and of CO2 into the leaves. In 9 out of 11 experiments, induced closure of stomata reduced transpiration relatively more than CO2 assimilation as predicted from diffusion theory. This work led to e...

The anatomical and morphological parameters of the leaf blade Forsythia suspensa were investigated to determine species’ stability in Kyiv metropolis (Ukraine) conditions monitor environmental pollution. leaves F. selected at four monitoring sites Kyiv, which differed their distance highways intensity traffic. histological structure changed toward xeromorphism variants where plants exposed incr...

Many studies in the last years showed that, for a wide variety of plants, stomata apertures exhibits spatial temporal patterns in a phenomena known as patchy stomatal conductance. Many attempts were made to build numerical models to explain this complex behavior, but none were able to explain all of behaviors observed in nature. In this work we discuss some limitations of an hydraulic cellular ...

Stomata regulate gas exchange and are distributed across the leaf epidermis with characteristic spacing. Arabidopsis stomata are produced by asymmetric cell divisions. Mutations in the gene TOO MANY MOUTHS (TMM) disrupt patterning by randomizing the plane of formative asymmetric divisions and by permitting ectopic divisions. TMM encodes a leucine-rich repeat-containing receptor-like protein exp...

Stomatal aperture responses of Commelina communis L. between well watered plants and water stressed plants were investigated. To see the very rapid response to water stress, the plants were directly rooted out from the soil and exposed to the air immediately. Stomata, rooted out from the soil, were totally closed within 10 minutes without any detention time while the stomata of the plants in th...

Flowering plant stomata close through passive dehydration or by active pumping of anions through SLAC, a phospho-activated membrane channel. A new study reports that moss likely utilise this same mechanism, and thus supports an early origin for SLAC-mediated active stomatal control.

in one side the negative effects of increasing of concentration of carbon dioxide in the world, and in the other side, the positive effects of greenhouse enrichment by such gas is one of the most important reasons in researching of this gas on different plants. for assessment of the effects of carbon dioxide and light regimes in different genotypes of pansy (viola tricolor) a factorial experime...

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...