Rotational streaming in fiber cells and its role in translocation.

abstract：:The intracellular distribution of enzymes capable of catalyzing the reactions from phosphoglycolate to glycerate in the bluegreen colored eucaryotic alga Cyanidium caldarium has been studied. After separating the organelles from a crude homogenate on a linear flotation gradient, the enzymes glycolate oxidase and gluta...

journal_title：Plant physiology

authors： Gross W,Beevers H

更新日期：1989-07-01 00:00:00

abstract：:We investigated the synthesis and turnover of cell wall polysaccharides of the flax (Linum usitatissimum L.) plant during development of the phloem fibers. One-month-old flax plants were exposed to a 40-min pulse with 14CO2 followed by 8-h, 24-h, and 1-month periods of chase with ambient CO2, and radioactivity in cell...

journal_title：Plant physiology

authors： Gorshkova TA,Chemikosova SB,Lozovaya VV,Carpita NC

更新日期：1997-06-01 00:00:00

abstract：:Computing techniques are used to simulate the course of uptake of K(+), Na(+), and Cl(-) by low-salt roots. Measurements of the fluxes of these ions in high-salt roots are used to calculate membrane permeabilities, which are then used to calculate cell uptake. In this way it is possible to test the predictive value of...

journal_title：Plant physiology

authors： Pitman MG

更新日期：1969-10-01 00:00:00

abstract：:The binding of ferredoxin-NADP reductase to spinach chloroplast membranes was studied by washing the membranes with different media. Release of the enzyme from the thylakoids was greater in 0.75 millimolar EDTA but was not complete inasmuch as 20% the activity remained membrane-bound after three washes.A Scatchard plo...

journal_title：Plant physiology

authors： Carrillo N,Vallejos RH

更新日期：1982-01-01 00:00:00

abstract：:To function, the catalytic sites of Rubisco (EC 4.1.1.39) need to be activated by the reversible carbamylation of a lysine residue within the sites followed by rapid binding of magnesium. The activation of Rubisco in vivo requires the presence of the regulatory protein Rubisco activase. This enzyme is thought to aid t...

journal_title：Plant physiology

authors： von Caemmerer S,Hendrickson L,Quinn V,Vella N,Millgate AG,Furbank RT

更新日期：2005-02-01 00:00:00

abstract：:Spinach (Spinacia oleracea CV Bloomsdale Long Standing) leaf cytoplasmic starch phosphorylase and rabbit muscle phosphorylase a were inactivated by incubation with partially purified leaf extract in the presence of ATP and Mg(2+). The inactivating factor(s) were heat stable and susceptible to protease attack. Phosphor...

journal_title：Plant physiology

authors： Hammond JB,Preiss J

更新日期：1983-12-01 00:00:00

abstract：:Isoprenoid biosynthesis in plant plastids occurs via the 1-deoxy-d-xylulose 5-phosphate (DXP) pathway. We used tobacco rattle virus (TRV) to posttranscriptionally silence the expression of the last two enzymes of this pathway, the IspG-encoded (E)-4-hydroxy-3-methylbut-2-enyl diphosphate synthase (HDS) and the IspH-en...

journal_title：Plant physiology

authors： Page JE,Hause G,Raschke M,Gao W,Schmidt J,Zenk MH,Kutchan TM

更新日期：2004-04-01 00:00:00

abstract：:The prospect that Ca(2+) promotes senescence by activating calmodulin has been examined using cut pea (Pisum sativum co Alaska) foliage as a model system. Senescence was induced by severing 17-day-old plants from their roots and maintaining them in aqueous test solutions in the dark for an additional 4 days. Treatment...

journal_title：Plant physiology

authors： Leshem YY,Sridhara S,Thompson JE

更新日期：1984-06-01 00:00:00

abstract：:The interaction between mannan polysaccharides and cellulose microfibrils contributes to cell wall properties in some vascular plants, but the molecular arrangement of mannan in the cell wall and the nature of the molecular bonding between mannan and cellulose remain unknown. Previous studies have shown that mannan is...

journal_title：Plant physiology

authors： Yu L,Lyczakowski JJ,Pereira CS,Kotake T,Yu X,Li A,Mogelsvang S,Skaf MS,Dupree P

更新日期：2018-11-01 00:00:00

abstract：:Magnesium (Mg) chelatase is a heterotrimeric enzyme complex that catalyzes a key regulatory and enzymatic reaction in chlorophyll biosynthesis, the insertion of Mg(2+) into protoporphyrin IX. Studies of the enzyme complex reconstituted in vitro have shown that all three of its subunits, CHL I, CHL D, and CHL H, are re...

journal_title：Plant physiology

authors： Rissler HM,Collakova E,DellaPenna D,Whelan J,Pogson BJ

更新日期：2002-02-01 00:00:00

abstract：:The effect of external CO2 concentration on the expression of carbonic anhydrase (CA) and ribulose-1,5-bisphosphate carboxylase/oxygenase (Rubisco) was examined in pea (Pisum sativum cv Little Marvel) leaves. Enzyme activities and their transcript levels were reduced in plants grown at 1000 [mu]L/L CO2 compared with p...

journal_title：Plant physiology

authors： Majeau N,Coleman JR

更新日期：1996-10-01 00:00:00

abstract：:Cryptogein (CRY), a protein secreted by Phytophthora cryptogea, causes necrosis on tobacco (Nicotiana tabacum) plants at the site of application (the stem or the roots) and also on distant leaves. Autoradiography of plantlets after root absorption of radioiodinated CRY demonstrated a rapid migration of the label to th...

journal_title：Plant physiology

authors： Devergne JC,Bonnet P,Panabières F,Blein JP,Ricci P

更新日期：1992-07-01 00:00:00

abstract：:A mechanism that confers increased Al resistance in the Arabidopsis thaliana mutant alr-104 was investigated. A modified vibrating microelectrode system was used to measure H+ fluxes generated along the surface of small Arabidopsis roots. In the absence of Al, no differences in root H+ fluxes between wild type and alr...

journal_title：Plant physiology

authors： Degenhardt J,Larsen PB,Howell SH,Kochian LV

更新日期：1998-05-01 00:00:00

abstract：:Lutescens-1, a tobacco mutant with a maternally inherited dysfunction, displayed an unusual developmental phenotype. In vivo measurement of chlorophyll fluorescence revealed deterioration in photosystem II (PSII) function as leaves expanded. Analysis of thylakoid membrane proteins by polyacrylamide gel electrophoresis...

journal_title：Plant physiology

authors： Chia CP,Duesing JH,Arntzen CJ

更新日期：1986-09-01 00:00:00

abstract：:Previous work has shown that tobacco (Nicotiana tabacum) plants engineered to express spinach choline monooxygenase in the chloroplast accumulate very little glycine betaine (GlyBet) unless supplied with choline (Cho). We therefore used metabolic modeling in conjunction with [(14)C]Cho labeling experiments and in vivo...

journal_title：Plant physiology

authors： McNeil SD,Rhodes D,Russell BL,Nuccio ML,Shachar-Hill Y,Hanson AD

更新日期：2000-09-01 00:00:00

abstract：:Long-term aging of potato (Solanum tuberosum) seed-tubers resulted in a loss of patatin (40 kD) and a cysteine-proteinase inhibitor, potato multicystatin (PMC), as well as an increase in the activities of 84-, 95-, and 125-kD proteinases. Highly active, additional proteinases (75, 90, and 100 kD) appeared in the oldes...

journal_title：Plant physiology

authors： Kumar GN,Houtz RL,Knowles NR

更新日期：1999-01-01 00:00:00

abstract：:The enzyme aldose (aldehyde) reductase was partially purified (142-fold) and characterized from Euonymus japonica leaves. The reductase, a dimer, had an average molecular weight of 67,000 as determined by gel filtration on Sephadex G-100. The enzyme was NADPH specific and reduced a broad range of substrates including ...

journal_title：Plant physiology

authors： Negm FB

更新日期：1986-04-01 00:00:00

abstract：:Nitrate reductase of the salt-tolerant alga Dunaliella parva could utilize NADPH as well as NADH as an electron donor. The two pyridine nucleotide-dependent activities could not be separated by either ion exchange chromatography on DEAE-cellulose or gel filtration on Sepharose 4B. The NADPH-dependent activity was not ...

journal_title：Plant physiology

authors： Heimer YM

更新日期：1976-07-01 00:00:00

abstract：:The photometric method was used to test a possibility proposed recently that a new photoreceptor with maximum activity at 620 nm is involved in mediating chloroplast rotation in Mougeotia (Z Lechowski, J Bialczyk [1988] Plant Physiol 88: 189-193). The hypothesis was tested under conditions of continuous dichromatic un...

journal_title：Plant physiology

authors： Walczak T,Gabrỳs H,Appenroth KJ

更新日期：1990-09-01 00:00:00

abstract：:Regulation of photosynthetic activity can contribute to the prevention of photodamage in stress resistant plants during exposure to drought or low temperatures. Responses to increasing levels of water stress were examined in seedlings of the stress resistant forest conifer, white spruce (Picea glauca [Moench.] Voss). ...

journal_title：Plant physiology

authors： Toivonen P,Vidaver W

更新日期：1988-03-01 00:00:00

abstract：:The wilty tomato mutant, flacca, and the control variety, Rheinlands Ruhm, were compared with regard to the endogenous activity and concentration of auxin- and abscisic acid-like substances during ontogeny. The mutant wilts fast under water deficit because of inability to close its stomata. Symptoms characteristic of ...

journal_title：Plant physiology

authors： Tal M,Imber D

更新日期：1970-09-01 00:00:00

abstract：:Arabidopsis (Arabidopsis thaliana) contains approximately 100 homeobox genes, many of which have been shown to play critical roles in various developmental processes. Here we characterize the zinc finger-homeodomain (ZF-HD) subfamily of homeobox genes, consisting of 14 members in Arabidopsis. We demonstrate that the H...

journal_title：Plant physiology

authors： Tan QK,Irish VF

更新日期：2006-03-01 00:00:00

abstract：:Plant architecture is optimized for the local light environment. In response to foliar shade or neighbor proximity (low red to far-red light), some plant species exhibit shade-avoiding phenotypes, including increased stem and hypocotyl growth, which increases the likelihood of outgrowing competitor plants. If shade pe...

journal_title：Plant physiology

authors： Procko C,Crenshaw CM,Ljung K,Noel JP,Chory J

更新日期：2014-07-01 00:00:00

abstract：:The decarboxylation of endogenous free glutamic acid by Chlorella pyrenoidosa, Marburg strain, was induced by a variety of metabolic poisons, by anaerobic conditions, and by freezing and thawing the cells. The rate of decarboxylation was proportional to the concentration of inhibitor present. Possible mechanisms which...

journal_title：Plant physiology

authors： Lane TR,Stiller M

更新日期：1970-05-01 00:00:00

abstract：:This study was designed to address the question: How specific for double bond position and conformation are plant enzymes that act on oleoyl-acyl carrier protein (ACP)? Octadecenoyl-ACPs with cis double bonds at positions [delta]6, [delta]7, [delta]8, [delta]9, [delta]10, [delta]11, or [delta]12 and elaidyl (18:1[delt...

journal_title：Plant physiology

authors： Dormann P,Frentzen M,Ohlrogge JB

更新日期：1994-03-01 00:00:00

abstract：:Inoculation of soybean (Glycine max) plants with Phakopsora pachyrhizi, the causal organism of Asian soybean rust, elicits a biphasic response characterized by a burst of differential gene expression in the first 12 h. A quiescent period occurs from 24 to 48 h after inoculation, in which P. pachyrhizi continues to dev...

journal_title：Plant physiology

authors： Schneider KT,van de Mortel M,Bancroft TJ,Braun E,Nettleton D,Nelson RT,Frederick RD,Baum TJ,Graham MA,Whitham SA

更新日期：2011-09-01 00:00:00

abstract：:The growth of transgenic tomato (Lycopersicon esculentum) plants that express in their apoplast yeast invertase under the control of the cauliflower mosaic virus 35S promoter is severely inhibited. The higher the level of invertase, the greater the inhibition of growth. A second phenotypic characteristic of these tran...

journal_title：Plant physiology

authors： Dickinson CD,Altabella T,Chrispeels MJ

更新日期：1991-02-01 00:00:00

abstract：:Experiments with ethylene-insensitive tomato (Lycopersicon esculentum) and petunia (Petunia x hybrida) plants were conducted to determine if normal or adventitious root formation is affected by ethylene insensitivity. Ethylene-insensitive Never ripe (NR) tomato plants produced more below-ground root mass but fewer abo...

journal_title：Plant physiology

authors： Clark DG,Gubrium EK,Barrett JE,Nell TA,Klee HJ

更新日期：1999-09-01 00:00:00

abstract：:We have shown that amide-linked IAA (indole-3-acetic acid) conjugates accumulated to high levels during maturation of bean seeds (K. Bialek and J.D. Cohen [1989] Plant Physiol 91: 775-779). In the present study, we were interested in the fate of these and other IAA conjugates during seed germination. The content of am...

journal_title：Plant physiology

authors： Bialek K,Cohen JD

更新日期：1992-12-01 00:00:00

abstract：:Substantial experimental datasets defining the subcellular location of Arabidopsis (Arabidopsis thaliana) proteins have been reported in the literature in the form of organelle proteomes built from mass spectrometry data (approximately 2,500 proteins). Subcellular location for specific proteins has also been published...

journal_title：Plant physiology

authors： Heazlewood JL,Tonti-Filippini J,Verboom RE,Millar AH

更新日期：2005-10-01 00:00:00