scholarly journals Plant physiology: Ion channels in plant cells

Nature ◽  
1985 ◽  
Vol 313 (6003) ◽  
pp. 529-529 ◽  
Author(s):  
E.A.C. MacRobbie
Keyword(s):  
Plant Physiology ◽  
Ion Channels ◽  
Plant Cells

Ion Channels in the Plasma Membrane of Plant Cells

1992 ◽  
pp. 225-236
Author(s):  
B. R. Terry ◽  
S. D. Tyerman ◽  
G. P. Findlay
Keyword(s):  
Plasma Membrane ◽  
Ion Channels ◽  
Plant Cells

scholarly journals Emeritus Professor Reinhard Ferdinand Mathias Van Steveninck (1928–2017) and Dr Margaret Elva Van Steveninck (1931–2017) – plant physiologists and electron microscope X-ray microprobe specialists

2019 ◽  
Vol 46 (10) ◽  
pp. 962
Author(s):  
Terence V. Price
Keyword(s):  
Plant Physiology ◽  
Early Recognition ◽  
Plant Cells ◽  
Soil Science ◽  
Active Member ◽  
Emeritus Professor ◽  
X Ray ◽  
Plant Soil ◽  
Major Review ◽  
Ageing Phenomenon

This obituary highlights the careers and contributions of two eminent plant physiologists. Emeritus Professor Reinhard Van Steveninck (1928–2017) was educated at Wageningen and London University. He joined the Department of Scientific and Industrial Research (DSIR), New Zealand, and achieved early recognition for his publications on abscission and mechanisms of salt uptake of plants. He was appointed Professor of Agriculture (Plant/Soil Science) at La Trobe University in 1976. He expanded his research into salinity tolerance of lupins and the ultrastructural localisation of ions using X-ray microprobe analysis. He was a good teacher and nurtured and trained many researchers in this area. He was a recognised expert in using a combination of ultrastructural techniques to study the movement of ions within plant cells and across tissues. His publications include book chapters on plant physiology, as well as a major review on the ‘washing’ or ‘ageing’ phenomenon in plant tissues. He was an active member and President of the Australian Society of Plant Physiologists. Margaret Van Steveninck (1931–2017) worked as a Research Assistant at Adelaide University and subsequently as a Demonstrator and Senior Demonstrator in Botany at Queensland and La Trobe University. Her plant physiology research with her husband resulted in numerous joint publications including a chapter on microanalysis in ‘Electron microscopy of plant cells’.

scholarly journals Non-genomic effects of steroid hormones: role of ion channels

2019 ◽  
pp. 3-12 ◽  
Author(s):  
Darya Y. Straltsova ◽  
Maryia A. Charnysh ◽  
Palina V. Hryvusevich ◽  
Vadim V. Demidchik
Keyword(s):  
Ion Channels ◽  
Ion Channel ◽  
Steroid Hormones ◽  
Plant Cells ◽  
Membrane Receptors ◽  
Physiological Effects ◽  
Genomic Effects

In animals, steroid hormones can act using genomic and non-genomic mechanisms. Plant steroid hormones, brassinosteroids, are capable of inducing the expression of some gene ensembles, however their non-genomic pathways for triggering the physiological effects are still unclear. In this paper, we propose the hypothesis on existence of brassinosteroid non-genomic effects in plant cells. This non-genomic pathway could due to modulation of ion channel activities and modification of membrane receptors.

scholarly journals Ion Channels in Plant Cells.

MEMBRANE ◽  
1993 ◽  
Vol 18 (1) ◽  
pp. 3-12
Author(s):  
Taka-aki OHKAWA
Keyword(s):  
Ion Channels ◽  
Plant Cells

Single Ion Channel Current Data from the Plasmalemma of Cytoplasmic Fragments of the Green Alga, Hydrodictyon africanum

1995 ◽  
Vol 22 (4) ◽  
pp. 571
Author(s):  
N Findlay ◽  
GP Findlay
Keyword(s):  
Ion Channels ◽  
Higher Plants ◽  
Membrane Surface ◽  
Plant Cells ◽  
Outward Current ◽  
Current Data ◽  
Patch Clamping ◽  
Ion Specificity ◽  
Channel Current ◽  
Gain Access

To measure, by patch clamping, electric current through ion channels in the plasmalemma of plant cells, access to the membrane surface is required. In higher plants, this access is gained by the preparation of protoplasts by enzymic methods. In plants such as the freshwater alga Hydrodictyon africanum, which have large cells, the preparation of protoplasts by enzymic methods is not possible. In this paper we describe a non-enzymic method for gaining access to the plasmalemma of Hydrodictyon. Our initial attempts to gain access to the plasmalemma of these cells by first plasmolysing the cells, and then cutting a window in the wall, so exposing the plasmalemma, were not successful. It was possible, however, after drying the cells in air, to cut them open and obtain fragments of the cytoplasm which maintain their original curvature. Standard patch clamping methods were then used to measure currents through single ion channels in the membrane, presumed to be the plasmalemma, bounding the outer surface of the fragments, although the success rate was low. Two types of channels were observed: (a) a multistate channel whose ion specificity was not established, and which in attached patches behaved as an outward current rectifier, and in a detached patch, as both inward and outward rectifier; and (b) a Cl- channel.

SEM study of the morphological effects of kinetin and zeatin on the growth and development of the apical meristem in wheat

1995 ◽  
Vol 53 ◽  
pp. 978-979
Author(s):  
G. M. Hutchins ◽  
J. S. Gardner
Keyword(s):  
Growth And Development ◽  
Furfuryl Alcohol ◽  
Apical Meristem ◽  
Plant Cells ◽  
Triticum Aestivum L ◽  
Morphological Development ◽  
Naturally Occurring ◽  
Chinese Spring Wheat ◽  
Sem Study ◽  
Moist Environment

Cytokinins are plant hormones that play a large and incompletely understood role in the life-cycle of plants. The goal of this study was to determine what roles cytokinins play in the morphological development of wheat. To achieve any real success in altering the development and growth of wheat, the cytokinins must be applied directly to the apical meristem, or spike of the plant. It is in this region that the plant cells are actively undergoing mitosis. Kinetin and Zeatin were the two cytokinins chosen for this experiment. Kinetin is an artificial hormone that was originally extracted from old or heated DNA. Kinetin is easily made from the reaction of adenine and furfuryl alcohol. Zeatin is a naturally occurring hormone found in corn, wheat, and many other plants.Chinese Spring Wheat (Triticum aestivum L.) was used for this experiment. Prior to planting, the seeds were germinated in a moist environment for 72 hours.

Confocal microscopy of the cytoskeleton in living plant cells following microinjection of fluorescent probes

1993 ◽  
Vol 51 ◽  
pp. 130-131
Author(s):  
Ann Cleary
Keyword(s):  
Cell Division ◽  
Fluorescent Probes ◽  
Actin Filaments ◽  
Intracellular Transport ◽  
Cell Structure ◽  
Plant Cells ◽  
Cell Plate ◽  
Cell Cortex ◽  
Living Plant ◽  
Rhodamine Phalloidin

Microinjection of fluorescent probes into living plant cells reveals new aspects of cell structure and function. Microtubules and actin filaments are dynamic components of the cytoskeleton and are involved in cell growth, division and intracellular transport. To date, cytoskeletal probes used in microinjection studies have included rhodamine-phalloidin for labelling actin filaments and fluorescently labelled animal tubulin for incorporation into microtubules. From a recent study of Tradescantia stamen hair cells it appears that actin may have a role in defining the plane of cell division. Unlike microtubules, actin is present in the cell cortex and delimits the division site throughout mitosis. Herein, I shall describe actin, its arrangement and putative role in cell plate placement, in another material, living cells of Tradescantia leaf epidermis.The epidermis is peeled from the abaxial surface of young leaves usually without disruption to cytoplasmic streaming or cell division. The peel is stuck to the base of a well slide using 0.1% polyethylenimine and bathed in a solution of 1% mannitol +/− 1 mM probenecid.

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