Search Results - "HEPLER, P. K"

POLARIZED CELL GROWTH IN HIGHER PLANTS by Hepler, Peter K, Vidali, Luis, Cheung, Alice Y

“…Pollen tubes and root hairs are highly elongated, cylindrically shaped cells whose polarized growth permits them to explore the environment for the benefit of…”
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Pollen Tube Growth and the Intracellular Cytosolic Calcium Gradient Oscillate in Phase while Extracellular Calcium Influx Is Delayed by Holdaway-Clarke, Terena L., Feijó, José A., Hackett, Grant R., Kunkel, Joseph G., Hepler, Peter K.

“…Ratio images of cytosolic ${\rm Ca}^{2+}\ ({\rm Ca}^{2+}{}_{{\rm i}})$ in growing, fura-2-dextran-loaded Lilium longiflorum pollen tubes taken at 3- to 5-sec…”
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Actin polymerization is essential for pollen tube growth by Vidali, L, McKenna, S T, Hepler, P K

“…Actin microfilaments, which are prominent in pollen tubes, have been implicated in the growth process; however, their mechanism of action is not well…”
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Actin and pollen tube growth by Vidali, L, Hepler, P K

“…Actin microfilaments (MFs) are essential for the growth of the pollen tube. Although it is well known that MFs, together with myosin, deliver the vesicles…”
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Growing pollen tubes possess a constitutive alkaline band in the clear zone and a growth-dependent acidic tip by Feijo, J.A, Sainhas, J, Hackett, G.R, Kunkel, J.G, Hepler, P.K

“…Using both the proton selective vibrating electrode to probe the extracellular currents and ratiometric wide-field fluorescence microscopy with the indicator…”
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Pollen tube growth is coupled to the extracellular calcium ion flux and the intracellular calcium gradient: effect of BAPTA-type buffers and hypertonic media by Pierson, E.S. (University of Massachusetts, Amherst, MA.), Miller, D.D, Callaham, D.A, Shipley, A.M, Rivers, B.A, Cresti, M, Hepler, P.K

“…Lily pollen tubes possess a steep, tip focused intracellular Ca2+ gradient and a tip-directed extracellular Ca2+ influx. Ratiometric ion imaging revealed that…”
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Quantification of microtubule dynamics in living plant cells using fluorescence redistribution after photobleaching by Hush, J.M, Wadsworth, P, Callaham, D.A, Hepler, P.K

“…Microtubule (MT) turnover within the four principal MT arrays, the cortical array, the preprophase band, the mitotic spindle and the phragmoplast, has been…”
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Ion Changes in Legume Root Hairs Responding to Nod Factors by Luis Cárdenas, Holdaway-Clarke, Terena L., Sánchez, Federico, Quinto, Carmen, Feijó, José A., Kunkel, Joseph G., Hepler, Peter K.

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Cytokinesis in Higher Plants by Staehelin, L.Andrew, Hepler, Peter K

“…Cytokinesis is the process that leads to the production of two daughter cells from one parent. In animal cells this is achieved by constriction of the plasma…”
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The cytosolic Ca2+ concentration gradient of Sinapis alba root hairs as revealed by Ca2+-selective microelectrode tests and fura-dextran ratio imaging by Felle, H.H. (Universitat Giessen, Giessen, Germany.), Hepler, P.K

“…Using Ca2+-selective microelectrodes and fura 2-dextran ratio imaging, the cytosolic free [Ca2+] was measured in Sinapis alba root hair cells. Both methods…”
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Tip-Localized Calcium Entry Fluctuates during Pollen Tube Growth by Pierson, E.S., Miller, D.D., Callaham, D.A., van Aken, J., Hackett, G., Hepler, P.K.

“…Studies have been conducted on the dynamics of Ca2+entry in pollen tubes using ratiometric ion imaging to measure the intracellular gradient and an ion…”
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Probing the plant actin cytoskeleton during cytokinesis and interphase by profilin microinjection by Valster, A.H, Pierson, E.S, Valenta, R, Hepler, P.K, Emons, A.M.C

“…We have examined the cytological effects of microinjecting recombinant birch profilin in dividing and interphase stamen hair cells of Tradescantia virginiana…”
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Rearrangement of actin microfilaments in plant root hairs responding to Rhizobium etli nodulation signals by Cardenas, L, Vidali, L, Dominquez, J, Perez, H, Sanchez, F, Hepler, P.K, Quinto, C

“…The response of the actin cytoskeleton to nodulation (Nod) factors secreted by Rhizobium etli has been studied in living root hairs of bean (Phaseolus…”
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The role of plant villin in the organization of the actin cytoskeleton, cytoplasmic streaming and the architecture of the transvacuolar strand in root hair cells of Hydrocharis by Tominaga, Motoki, Yokota, Etsuo, Vidali, Luis, Sonobe, Seiji, Hepler, Peter K., Shimmen, Teruo

“…In many types of plant cell, bundles of actin filaments (AFs) are generally involved in cytoplasmic streaming and the organization of transvacuolar strands…”
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The role of calcium in cell division by Hepler, P K

“…Calcium ions (Ca2+) appear to participate in the regulation of several aspects of cell division. Evidence is accumulating that transients or local gradients in…”
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Effects of Yariv phenylglycoside on cell wall assembly in the lily pollen tube by Roy, S, Jauh, G.Y, Hepler, P.K, Lord, E.M

“…Arabinogalactan-proteins (AGPs) are proteoglycans with a high level of galactose and arabinose. Their current functions in plant development remain…”
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Rhizobium Nod factors induce increases in intracellular free calcium and extracellular calcium influxes in bean root hairs by Cardenas, L, Feijo, J.A, Kunkel, J.G, Sanchez, F, Holdaway-Clarke, T, Hepler, P.K, Quinto, C

“…Application of Nod factors to growing, responsive root hairs of the bean Phaseolus vulgaris induces marked changes in both the intracellular cytosolic free…”
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Physiological elevations in cytoplasmic free calcium by cold or ion injection result in transient closure of higher plant plasmodesmata by Holdaway-Clarke, Terena L., Walker, N. Alan, Hepler, Peter K., Overall, Robyn L.

“…The concentration of cytoplasmic free calcium ([Ca2+]cyt) required to close higher plant plasmodesmata was investigated using corn (Zea mays L. cv. Black…”
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Actin Filaments in Mature Guard Cells Are Radially Distributed and Involved in Stomatal Movement by Moon Jeong Kim, Hepler, Peter K., Soon-Ok Eun, Kwon Soo Ha, Lee, Youngsook

“…Stomatal movements, which regulate gas exchange in plants, involve pronounced changes in the shape and volume of the guard cell. To test whether the changes…”
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Ultrastructure of freeze-substituted pollen tubes of Lilium longiflorum by LANCELLE, S. A, HEPLER, P. K

“…In view of the importance of the lily pollen tube as an experimental model and the improvements in ultrastructural detail that can now be attained by the use…”
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