1
|
|
2
|
Affiliation(s)
- A Rodríguez-Navarro
- Departamento de Biotecnología, Escuela Técnica Superior de Ingenieros Agrónomos, Universidad Politécnica de Madrid, 28040, Madrid, Spain.
| |
Collapse
|
3
|
Maneechote C, Preston C, Powles SB. A Diclofop-methyl-ResistantAvena sterilisBiotype with a Herbicide-Resistant Acetyl-coenzyme A Carboxylase and Enhanced Metabolism of Diclofop-methyl. ACTA ACUST UNITED AC 1999. [DOI: 10.1002/(sici)1096-9063(199702)49:2<105::aid-ps507>3.0.co;2-3] [Citation(s) in RCA: 41] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
|
4
|
Pettersson S, Kasimir-Klemedtsson A. Influx and efflux of K(+) in sunflower roots after transfer between solutions with different K(+) concentrations. PHYSIOLOGIA PLANTARUM 1990; 79:686-692. [PMID: 21087280 DOI: 10.1111/j.1399-3054.1990.tb00045.x] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/30/2023]
Abstract
It was investigated whether K(+) efflux, like K(+) influx, is affected when roots are transferred between solutions with different K(+) concentrations. Sunflower plants (Hehanthus annuus L. cv. Uniflorus) were grown on complete nutrient solutions with 0.1, 1.0, 10 or 25 mM K(+) . This produced plants with K(+) concentrations in the roots varying between 9 and 110 μmol (g fresh weight)(-1) . At the beginning of the experiments the plants were transferred to an (86) Rb-labelled experimental solution initially containing 0.1 mM K(+) . At intervals during 6.5 h samples were removed from the solution and analyzed for K(+) and radioactivity. Based on the analyses K(+) ((86) Rb) influx, K(+) net uptake and K(+) efflux could be computed. In'low K(+) 'roots, K(+) ((86) Rb) influx and K(+) net uptake agreed, suggesting a very low K(+) efflux. This was contrary to'high K(+) 'roots, where K(+) efflux was initially higher than K(+) ((86) Rb) influx. After about 4 h, K(+) efflux declined to a low value also in these roots. When 2-4-dinitrophenol was included in the experimental solution, K(+) ((86) Rb) influx was generally depressed, whereas K(+) efflux was high throughout the experiment and directly proportional to the K(+) status of the roots. Our hypothesis is that after transfer of'high K(+) 'roots to a solution with low K(+) concentration, the K(+) efflux from the vacuoles of root cells transiently increases, until a new electrochemical equilibrium is attained.
Collapse
Affiliation(s)
- S Pettersson
- Dept of Plant Physiology, Swedish Univ. of Agricultural Sciences, P.O. Box 7047, S-750-07 Uppsala, Sweden
| | | |
Collapse
|
5
|
Balsamo RA, Uribe EG. Plasmalemma- and tonoplast-ATPase activity in mesophyll protoplasts, vacuoles and microsomes of the Crassulacean-acid-metabolism plant Kalanchoe daigremontiana. PLANTA 1988; 173:190-196. [PMID: 24226399 DOI: 10.1007/bf00403010] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/16/1987] [Accepted: 08/18/1987] [Indexed: 06/02/2023]
Abstract
Adenosine-triphosphatase activity on the plasmalemma and tonoplast of isolated mesophyll protoplasts, isolated vacuoles and tonoplast-derived microsomes of the Crassulacean-acid-metabolism plant Kalanchoe daigremontiana Hamet et Perr., was localized by a cytochemical procedure using lead citrate. Enzyme activity was detected on the cytoplasmic surfaces of the plasmalemma and tonoplast. The identity of the enzymes was confirmed by various treatments differentiating the enzymes by their sensitivity to inhibitors of plasmalemma and tonoplast H(+)-ATPase. Isolated vacuoles and microsomes prepared from isolated vacuoles clearly exhibited single-sided deposition on membrane surfaces.
Collapse
Affiliation(s)
- R A Balsamo
- Department of Botany, Washington State University, 99164-4230, Pullman, WA, USA
| | | |
Collapse
|
6
|
What about the plants? Trends Biochem Sci 1987. [DOI: 10.1016/0968-0004(87)90046-6] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
|
7
|
Effects of ophiobolin A on potassium permeability, transmembrane electrical potential and proton extrusion in maize roots. ACTA ACUST UNITED AC 1983. [DOI: 10.1016/0304-4211(83)90093-7] [Citation(s) in RCA: 14] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
|
8
|
Hendrix DL, Pierce WS. Osmoregulation and membrane-mediated responses to altered water potential in plant cells. Cryobiology 1983; 20:466-86. [PMID: 6352178 DOI: 10.1016/0011-2240(83)90036-6] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/09/2023]
Abstract
Plant cells respond to short-term stress dehydration by modification of internal psi pi such that an inward gradient of psi w is maintained. In response to lowered psi w, increases in internal psi pi are created by alteration of cell inorganic ions and small organic solute content. Passive movement of water follows, changing cell hydration and forcing the plasma membrane against the elastic cell wall. The stretched cell wall presses against the cell contents, creating a hydrostatic pressure, psi p, which tends to force water out of the cell. The resulting hydrostatic pressure eventually comes into equilibrium with forces bringing water into the cell, largely psi pi, and the net flow of water ceases. The mechanism for sensing cell psi w changes is unknown but the initial event must be physical, not biochemical. The method of translation of such physical events into biochemical actions is also unknown but the Zimmermann model provides a means of signal transduction and amplification, through the alteration of membrane parameters, which could account for the observed changes. As for animal cells, cell levels of Ca2+ are important for their regulation of membrane Pj in these responses but unlike osmoregulation in higher animals, the involvement of plant hormones in these responses have not been clearly established. However, the important role of plant cell limiting membranes in plant cell osmoregulation responses seems obvious.
Collapse
|
9
|
Nelles A. Einfluß von Indolylessigsäure und Gibberellinsäure auf passive und energieabhängige Ionentransporte in Maiskoleoptilenzellen. ACTA ACUST UNITED AC 1983. [DOI: 10.1016/s0015-3796(83)80064-x] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
|
10
|
Bates GW, Goldsmith MHM, Goldsmith TH. Separation of tonoplast and plasma membrane potential and resistance in cells of oat coleoptiles. J Membr Biol 1982. [DOI: 10.1007/bf01868478] [Citation(s) in RCA: 16] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
|
11
|
Mercier AJ, Poole RJ. Electrogenic pump activity in red beet: Its relation to ATP levels and to cation influx. J Membr Biol 1980. [DOI: 10.1007/bf01869458] [Citation(s) in RCA: 33] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
|
12
|
Macrì F, Vianello A, Cerana R, Rasi-Caldogno F. Effects of Cercospora beticola toxin on ATP level of maize roots and on the phosphorylating activity of isolated pea mitochondria. ACTA ACUST UNITED AC 1980. [DOI: 10.1016/0304-4211(80)90110-8] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
|
13
|
Serrano R. Effect of ATPase inhibitors on the proton pump of respiratory-deficient yeast. EUROPEAN JOURNAL OF BIOCHEMISTRY 1980; 105:419-24. [PMID: 6247154 DOI: 10.1111/j.1432-1033.1980.tb04516.x] [Citation(s) in RCA: 145] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/19/2023]
Abstract
Diethylstilbestrol and dicyclohexylcarbodiimide inhibit the ATPase of the plasma membranes and the proton-pumping activity of the cells in a respiratory-deficient mutant of Saccharomyces cerevisiae. The effects of the inhibitors in vivo seem to be specific because neither the proton permeability nor the ATPase levels of the cells are affected. These results indicate that the yeast plasma-membrane ATPase corresponds to the proton pump of the cells. The fact that both inhibitors of the ATPase delay the fall of ATP levels which follows a block of fermentation indicates that ATPase function is one of the major ATP-consuming pathways in yeast. In addition, diethylstilbestrol prevents the fall of ATP levels produced by dinitrophenol, suggesting that this fall was caused by partial dissipation of the proton gradient and consequent stimulation of the proton-pumping ATPase.
Collapse
|
14
|
Potassium co-transport and antiport during the uptake of sucrose and glutamic acid from the xylem vessels. ACTA ACUST UNITED AC 1979. [DOI: 10.1016/0304-4211(79)90121-4] [Citation(s) in RCA: 16] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
|
15
|
Ballarin-Denti A, Cocucci M. Effects of abscisic acid, gibberellic acid and fusicoccin on the transmembrane potential during the early phases of germination in radish (Raphanus sativus L.) seeds. PLANTA 1979; 146:19-23. [PMID: 24317941 DOI: 10.1007/bf00381250] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/02/1978] [Accepted: 03/22/1979] [Indexed: 06/02/2023]
Abstract
During germination, the transmembrane electric potential (PD) of cortical cells of the embryonal axis of radish seeds (Raphanus sativus L.) rises from-120 mV initially to a maximum of-150 mV after 5 h incubation, then falls again to stable values of around-120 mV. Treatments inhibiting germination block the transitory PD increase. Administration of uncoupling agents or low temperatures, during the process of germination, produces a marked fall of the PD transitory increase. Abscisic Acid has a parallel inhibitory effect on PD and germination, while fusicoccin produces a rise in both; administration of abscisic acid with fusicoccin inhibits germination, while the PD remains at the high levels given by fusicoccin. These results are discussed in relation to ion exchange at membrane level.
Collapse
Affiliation(s)
- A Ballarin-Denti
- Centro di Studio del C.N.R. per la Biologia Cellulare e Molecolare delle Piante, Istituto di Scienze Botaniche dell'Università, via Giuseppe Colombo 60, I-20133, Milano, Italy
| | | |
Collapse
|
16
|
van Bel AJ, van Erven AJ. A model for proton and potassium co-transport during the uptake of glutamine and sucrose by tomato internode disks. PLANTA 1979; 145:77-82. [PMID: 24317567 DOI: 10.1007/bf00379930] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/25/1978] [Accepted: 11/09/1978] [Indexed: 06/02/2023]
Abstract
Internode disks of tomato (Lycopersicon esculentum cv. Moneymaker) were shaken in glutamine and sucrose solutions. At low external pH (<±5.5), the uptake of these substances was accompanied with K(+) efflux, at high pH (>±5.5) with K(+) influx. Low concentrations of external K(+) (2 mmol l(-1)) stimulated the uptake of glutamine, which was strongly inhibited by the supply of high K(+) concentrations (20 mmol l(-1)). The effect of K(+) was particularly pronounced at high pH-values. Addition of CCCP in light reduced the uptake of glutamine to the same level as in the dark, and stopped the K(+) fluxes which coincided with the uptake. A model is presented wherein the movements of K(+) across the membrane are related to co-transport, depending on the membrane potential and the Nernst potential of K(+).
Collapse
Affiliation(s)
- A J van Bel
- Botanical Laboratory, State University of Utrecht, Lange Nieuwstraat 106, 2501, Utrecht, The Netherlands
| | | |
Collapse
|
17
|
Measurement of transmembrane electropotentials of Vigna sinensis leaf cells infected with tobacco ringspot virus. ACTA ACUST UNITED AC 1978. [DOI: 10.1016/0048-4059(78)90059-0] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
|
18
|
Novacky A, Ullrich-Eberius CI, Lüttge U. Membrane potential changes during transport of hexoses in Lemna gibba G1. PLANTA 1978; 138:263-270. [PMID: 24414056 DOI: 10.1007/bf00386821] [Citation(s) in RCA: 29] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/04/1977] [Accepted: 11/21/1977] [Indexed: 06/03/2023]
Abstract
The membrane potential (pd) of duck weed (Lemna gibba G1) proved to be energy dependent. At high internal ATP levels of 74 to 105 nmol ATP g(-1) FW, pd was between -175 and -265 mV. At low ATP levels of 23 to 46 nmol ATP g(-1) FW, pd was low, about -90 to -120 mV at pH 5.7, but -180 mV at pH 8. Upon addition of glucose in the dark or by light energy the low pd recovered to the high values. The active component of the pd was depolarized by the addition of hexoses in the dark and in the light. Hexose-dependent depolarization of the pd (=Δ pd) followed a saturation curve similar to active hexose influx kinetics. Depolarization of the pd recovered in the dark even in the presence of the hexoses and with a 10fold enhancement in the light. Depolarization and recovery could be repeated several times with the same cell. Glucose uptake caused a maximum depolarization of 133 mV, fructose uptake half that amount, sucrose had the same effect as glucose. During 3-O-methylglucose and 2-deoxyglucose uptake the depolarizing effect was only slightly lower. The pd remained unchanged in the presence of mannitol. The glucose dependent Δ pd and especially the rate of pd recovery proved to be pH-dependent between pH 4 and pH 8. It was independent of the presence of 1 mM KCl. Although no Δ pH could be measured in the incubation medium, these results can be best explained by a H(+)-hexose cotransport mechanism powered by active H(+) extrusion at the plasmalemma.
Collapse
Affiliation(s)
- A Novacky
- Department of Plant Pathology, University of Missouri, 65201, Columbia, MO, USA
| | | | | |
Collapse
|
19
|
Novacky A, Karr AL, van Sambeek JW. Using Electrophysiology to Study Plant Disease Development. Bioscience 1976. [DOI: 10.2307/1297431] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022] Open
|
20
|
Cocucci M, Marrè E, Denti A, Scacchi A. Characteristics of fusicoccin-induced changes of transmembrane potential and ion uptake in maize root segments. ACTA ACUST UNITED AC 1976. [DOI: 10.1016/0304-4211(76)90066-3] [Citation(s) in RCA: 59] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
|
21
|
Racusen R, Satter RL. Rhythmic and phytochrome-regulated changes in transmembrane potential in samanea pulvini. Nature 1975; 255:408-10. [PMID: 165432 DOI: 10.1038/255408a0] [Citation(s) in RCA: 77] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
|
22
|
Shaner DL, Mertz SM, Arntzen CJ. Inhibition of ion accumulation in maize roots by abscisic acid. PLANTA 1975; 122:79-90. [PMID: 24435924 DOI: 10.1007/bf00385407] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/12/1974] [Accepted: 11/01/1974] [Indexed: 06/03/2023]
Abstract
An inhibition of root growth, a decrease in the amount of potassium (as (86)Rb) and phosphate ((32)P) accumulation by the root, and a partial depolarization of transmembrane electropotential were observed to develop with a similar time course and to a similar extent when intact maize (Zea mays L.) roots were treated with 10(-5) M abscisic acid (ABA). Potassium uptake was inhibited by ABA when excised, low-salt roots were bathed in KCl, KH2PO4, or K2SO4. ABA did not affect the ATP content of the tissues, the activity of isolated mitochondria, nor the activity of microsomal K(+)-stimulated ATPases.
Collapse
Affiliation(s)
- D L Shaner
- Department of Botany, University of Illinois, 61801, Urbana, Illinois, USA
| | | | | |
Collapse
|
23
|
Marrè E, Lado P, Ferroni A, Denti A. Transmembrane potential increase induced by auxin, benzyladenine and fusicoccin. Correlation with proton extrusion and cell enlargement. ACTA ACUST UNITED AC 1974. [DOI: 10.1016/0304-4211(74)90081-9] [Citation(s) in RCA: 72] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
|
24
|
|
25
|
Correlation between proton extrusion and stimulation of cell enlargement effects of fusicoccin and of cytokinins on leaf fragments and isolated cotyledons. ACTA ACUST UNITED AC 1974. [DOI: 10.1016/0304-4211(74)90012-1] [Citation(s) in RCA: 57] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
|
26
|
Rubinstein B, Light EN. Indoleacetic-acid-enhanced chloride uptake into coleoptile cells. PLANTA 1973; 110:43-56. [PMID: 24474310 DOI: 10.1007/bf00386921] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/08/1972] [Indexed: 06/03/2023]
Abstract
The enhancement by indoleacetic acid (IAA) of (36)Cl(-) uptake into Avena coleoptile sections was used to study the effects of a hormone on a membrane-controlled phenomenon. Compared to sections in phosphate buffer only, Cl(-) content of the cells increases 15 min after addition of IAA; the promotion is seen only with growth-active auxins and is saturated at 3 μM IAA. The percent enhancement by IAA is the same over a wide range of Cl(-) concentrations. The hormone effect is not observed at ice-bath temperature and is not correlated with growth or water movement into the cells. IAA does not influence the movement of Cl(-) in the section. While auxin must be present within the tissue in order to maintain the enhancement, there is no relationship between the total amount of auxin and the accelerated Cl(-) uptake that results. A polarity in the auxin effect is implied since only apical applications of IAA promote Cl(-) uptake.
Collapse
Affiliation(s)
- B Rubinstein
- Department of Botany, University of Massachusetts, 01002, Amherst, Massachusetts, USA
| | | |
Collapse
|
27
|
Sachs HG, McDonald TF. Membrane potentials of BHK (baby hamster kidney) cell line: ionic and metabolic determinants. J Cell Physiol 1972; 80:347-58. [PMID: 4675122 DOI: 10.1002/jcp.1040800305] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/11/2023]
|
28
|
Spanswick RM. Evidence for an electrogenic ion pump in Nitella translucens. I. The effects of pH, K + , Na + , light and temperature on the membrane potential and resistance. BIOCHIMICA ET BIOPHYSICA ACTA 1972; 288:73-89. [PMID: 4640392 DOI: 10.1016/0005-2736(72)90224-6] [Citation(s) in RCA: 149] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/11/2023]
|
29
|
|