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Showing 1 to 17 of 17 for “"GUARD CELL"”.
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Manipulating Guard Cell Anatomy and Physiology Using Biotechnological Approaches to Understanding Impact on Crop Performance
… on the leaf surrounded by specialized epidermal cells called guard cells (GCs). GCs increase or decrease in volume in response to internal and external stimuli thereby regulating stomata aperture. In most plants, the changes exhibited by GCs alter stomatal aperture and affect the flux of gases …
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The role of guard cell chloroplasts in stomatal function and coordinating stomatal and mesophyll responses .
Guard cells controls the stomata through which exchange of gas takes place by balancing between CO2 uptake for photosynthesis and water loss through transpiration leading to ultimate plant water use efficiency (WUE). Climate change is predicted to lead to greater temperatures and reduced water …
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Guard Cell Regulation of Stomatal Response: Chloroplast Function and Abscisic Acid Metabolism in Guard Cells of Commelina Communis and Vicia Faba
… were evaluated for obtaining viable, purified guard cells by sonication of epidermal peels of Vicia faba L. and by treatment at pH 4 of epidermal peels of Commelina communis L. The guard cells were free of mesophyll cells and chloroplasts and of living epidermal cells as shown by fluorescence …
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Regulation of the stomatal response to red light
… and surrounding atmosphere. Highly specialised guard cells surround each stomatal pore and regulate stomatal aperture in response to various environmental and endogenous cues. The mechanisms underlying the ‘quantitative’ red light response of stomata, which links stomatal conductance with CO2 …
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Studies in the Dryopteris inaequalis (Dryopteridaceae) complex
… Trichome characters, indusium, spore and guard-cell sizes proved to be of great taxonomic utility in defining species and cytotypes in the complex. Guard-cell and spore sizes in the different taxa are positively correlated to ploidal level. Illustrations of some microcharacters are …
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Evolution of stomata in mosses (Bryophyta): From molecules to form and function
… are not as structurally distinct from epidermal cells as are tracheophyte stomata. Anatomical features such as the presence of a cuticle, water-conducting cells, and spongy tissues with large areas for gas exchange are more pronounced in Oedipodium sporophytes and support the role of stomata in …
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Design of a microscopy-based screening method for stomatal development genes in <i>arabidopsis thaliana</i>
… stomata are also useful for research into cell patterning, differentiation, and development. The purpose of this project was to create a reverse genetics, microscopy-based screening method to identify Arabidopsis genes important in guard cell development. It was hypothesized that gene …
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Increased expression of NADP malic enzyme in the guard cells of <i>Arabidopsis</i> plants
… by stomatal opening, which is governed by guard cells surrounding the stomata. Influx of ions such as K<sup>+</sup>, Cl-, from neighboring cells into guard cells, and malate synthesis within guard cells increases turgor pressure opening the stomata. Stomata close when K<sup>+</sup> and Cl- …
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SNARE specificity in membrane protein traffic
… was found in studies to block the responses of guard cell K+ and Cl- channels to ABA. These observations raised questions about the role of SNAREs in ion channel control. In this study, the effects of several plasma membrane SNARE Sp2s and one PVC-localised SNARE Sp2 on the K+ channel KAT1 were …
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Genetic improvement of selected indigenous Cucurbitaceae species important for food and medicinal purposes in KwaZulu-Natal, South Africa
… leaf area and number of stomata, and increased guard cell length and leaf chlorophyll content in both species. In C. palmata, colchicine treatment increased root fresh and dry weight but reduced shoot fresh and dry weight. However, colchicine treatment inhibited female plants' flowering and …
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Stomatal regulation in C4 photosynthesis
… gases between the atmosphere and the leaf intercellular spaces is facilitated by stomata, tiny pores found on the leaf epidermis. These pores act as gateways, allowing CO<sub>2</sub> to enter the leaf while water vapor exits through transpiration. The regulation of stomatal behavior results in a …
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Context-specific metabolic predictions
… of biochemical reactions occurring in the cells: the metabolism. These reactions form an intricate network which produces all required chemical compounds, i.e., metabolites, from a set of input molecules. Cells regulate the activity through metabolic reactions in a context-specific way; …
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Functional analysis of the sucrose synthase gene family in Arabidopsis thaliana
… can play a role in supplying energy in companion cells for phloem loading (Fu and Park, 1995), provides substrates for starch synthesis (Zrenner et al., 1995), and supplies UDP-glucose for cell wall synthesis (Haigler et al., 2001). Analysis of the Arabidopsis genome identifies six Susy isoforms. …
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Towards plastid transformation in rapeseed (Brassica napus L.) and sugarbeet (Beta vulgaris L.)
… reports in the literature, only protoplasts from guard cells could be regenerated into plants. Thus, an alternative and reproducible method of shoot regeneration from protoplasts isolated from hypocotyl derived callus was successfully developed. While no shoot regeneration was observed from guard …
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Untersuchungen und Simulationen zur Koordination der Ionenflüsse bei der Schließzellbewegung in Vicia faba und Arabidopsis thaliana
Trotz der bereits lange gut bekannten Funktion der Stomata und der einzelnen, an der Funktion beteiligten Transportproteine, fehlen Funktionsmodelle, die diese schließzellspezifsch in einen Zusammenhang bringen und ihre Koordination untersuchen. Ergebnisse - Der einwärts gleichrichtende Kaliumkanal …
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GABA regulation of gas exchange in barley (Hordeum vulgare)
Stomatal guard cells are the primary gatekeepers for gas exchange between plants and the atmosphere, and therefore, modulate the rate of photosynthesis (i.e. plant energy production) and transpiration (i.e. plant water loss). It is well known that carbon gain and water loss through stomatal …
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ΠΕΙΡΑΜΑΤΙΚΗ ΜΕΛΕΤΗ ΤΗΣ ΜΟΡΦΟΓΕΝΕΣΗΣ ΤΩΝ ΚΑΤΑΦΡΑΚΤΙΚΩΝ ΚΥΤΤΑΡΩΝ ΤΟΥ ΦΥΤΟΥ ZEA MAYS
THE MORPHOGENETICAL MECHANISM OF DUMBELL-SHAPED GUARD CELLS WAS BEEN EXPERIMENTALLY STUDIED. THE MAIN OBSERVATIONS ARE AS FOLLOWS: 1) THE POSITION AND THE SHAPE OF THE LOCAL THICKENING ARE NOT AFFECTED BY TREATMENTS WITH COLCHICINE IPC AND CALCIUM CHLORIDE. THE FACTORS INVOLVED IN THIS PEHNOMENON …