abstract：:Several cell wall-bound glycosidases present in Avena sativa coleoptiles were assayed by following the hydrolysis of p-nitrophenyl-glycosides. Particular emphasis was placed on characterizing some parameters affecting the activity of beta-galactosidase. The pH optimum of this enzyme is 4.5 to 5.5; it is sensitive to c...

journal_title：Plant physiology

authors： Johnson KD,Daniels D,Dowler MJ,Rayle DL

更新日期：1974-02-01 00:00:00

abstract：:Cell-free extracts of Chlorella pyrenoidosa contained two enzymes capable of oxidizing d-lactate; these were glycolate dehydrogenase and NAD(+)-dependent d-lactate dehydrogenase. The two enzymes could be distinguished by differential centrifugation, glycolate dehydrogenase being largely particulate and NAD(+)-d-lactat...

journal_title：Plant physiology

authors： Gruber PJ,Frederick SE,Tolbert NE

更新日期：1974-02-01 00:00:00

abstract：:The growth potential of embryonic axes of Acer saccharum Marsh. increased during moist storage at 5 C but not at 20 C. During the period of increasing growth potential, the oxygen consumption of the axes remained constant. It was possible to distinguish three phases of the stratification-germination process at 5 C wit...

journal_title：Plant physiology

authors： Simmonds JA,Dumbroff EB

更新日期：1974-01-01 00:00:00

abstract：:An automatic digital diffusion porometer circuit is described. The circuit is highly stable with respect to temperature and supply voltage. The device is capable of high timing accuracy over very short measurement intervals, so that measurements may be made rapidly without the danger of stomatal changes occurring duri...

journal_title：Plant physiology

authors： Fiscus EL

更新日期：1974-01-01 00:00:00

abstract：:Primary leaves of 8-day-old Phaseolus vulgaris plants dipped in water at 46.5 to 47.5 C for 2 minutes were found to have decreased synthesis of lipid and beta-glucan compared to controls; UDP-glucose was used as substrate by cell-free preparations. As time elapsed, leaf growth, which was inhibited within the first 12 ...

journal_title：Plant physiology

authors： Ordin L,Itai C,Benzioni A,Musolan C,Kindinger JI

更新日期：1974-01-01 00:00:00

abstract：:Ammonium (NH(4) (+)) nutrition inhibits water uptake and root exudation and decreases leaf water potential of tomato plants grown in solution culture. This inhibition is readily reversible by NO(3) (-) for short term exposures to NH(4) (+); however, recovery is delayed following long term exposures. ...

journal_title：Plant physiology

authors： Quebedeaux B,Ozbun JL

更新日期：1973-12-01 00:00:00

abstract：:Amino acid uptake into leaf fragments of Pisum sativum depended on metabolism. Glycine uptake was optimal at 30 C and could be supported by respiration and by photosynthesis. Based on studies with an electron flow cofactor, inhibitors, and uncouplers, the energy source for glycine uptake was apparently ATP.The energy-...

journal_title：Plant physiology

authors： Cheung YN,Nobel PS

更新日期：1973-12-01 00:00:00

abstract：:The distribution of solutes in the various cells of sugar beet (Beta vulgaris L.) source leaves, petioles, and sink leaves was studied in tissue prepared by freeze-substitution. The differences in degree of cryoprotection indicated that sieve elements and companion cells of the source leaf, petiole, and sink leaf cont...

journal_title：Plant physiology

authors： Geiger DR,Giaquinta RT,Sovonick SA,Fellows RJ

更新日期：1973-12-01 00:00:00

abstract：:Contrasting metabolic regimes operate in Opuntia basilaris Engelm. and Bigelov, before and after precipitation. During periods of drought, atmospheric CO(2) exchange and transpiration are greatly reduced throughout the day/night cycle by stomatal closure and a highly impervious cuticle. The hypothesis is that endogeno...

journal_title：Plant physiology

authors： Szarek SR,Johnson HB,Ting IP

更新日期：1973-12-01 00:00:00

abstract：:Coupling factor particles are associated with membranes of maize etioplasts (Lockshin et al., 1971. Biochim. Biophys. Acta 226: 366-382). In addition, several, but not all, of the polypeptides found in the photosynthetic lamellae of maize chloroplasts are present in etioplasts.During the photoregulated maturation of c...

journal_title：Plant physiology

authors： Forger JM,Bogorad L

更新日期：1973-11-01 00:00:00

abstract：:High specific radioactivity (26.3 mc/mmole) racemic 2-(14)C-abscisic acid was synthesized. An aliquot of abscisic acid, 1.2 x 10(-4)m in aqueous methanolic solution, was applied to the surface of either a cotyledon or the first true leaf of 8- to 32-day-old cotton seedlings (Gossypium hirsutum L.). After various inter...

journal_title：Plant physiology

authors： Shindy WW,Asmundson CM,Smith OE,Kumamoto J

更新日期：1973-11-01 00:00:00

abstract：:The species Arundinella hirta L. posseses a striking variation of the leaf anatomy that is characteristic of C(4) grasses. In addition to a sheath of large, bright green cells around the vascular bundles, there are strands of large parenchyma cells which appear identical to the bundle sheath cells and which run parall...

journal_title：Plant physiology

authors： Crookston RK,Moss DN

更新日期：1973-11-01 00:00:00

abstract：:Excised corn roots, Zea mays, had radioactively labeled solution applied at two points along their length, for 1 minute, and were then kept in dilute, unlabeled nutrient solution. During this "chase" period, exudate was collected at 1-minute intervals, and its content of radioions was determined. Two pulses of label a...

journal_title：Plant physiology

authors： Epstein E,Norlyn JD

更新日期：1973-10-01 00:00:00

abstract：:Partially purified aminoacyl synthetase preparations from pea roots (Pisum sativum L. var. Alaska) contain a heat-labile factor which can degrade leucyl-tRNA(6) (leu) to a new species. The singular electrophoretic and chromatographic mobilities, the isoprenoid nucleoside content, and the charging characteristics of th...

journal_title：Plant physiology

authors： Babcock DF,Morris RO

更新日期：1973-09-01 00:00:00

abstract：:The sterol composition of C. ellipsoidea was markedly changed when this alga was grown in the presence of 1 mug/g triparanol. Triparanol appears to inhibit the removal of 14alpha-methyl group, the second alkylation at C-24, Delta(7)-reductase, and Delta(8) --> Delta(7)-isomerase. The effect of triparanol in Chlorella ...

journal_title：Plant physiology

authors： Chan JT,Patterson GW

更新日期：1973-09-01 00:00:00

abstract：:In a study on 3-day maize (Zea mays) seedlings, grown on nitrate, requirements were established for the maximum extraction and optimum stabilization of nitrate reductase in vitro. With the primary root, 5 mm cysteine were required in the extraction medium, but for the scutellum, which has a high level of endogenous th...

journal_title：Plant physiology

authors： Wallace W

更新日期：1973-09-01 00:00:00

abstract：:Rhythmic fluctuation in the basipetal movement of auxin occurs in corn (Zea mays) coleoptiles oriented either in the vertical or in the horizontal position. This periodicity of transport rate varies from region to region in a horizontal coleoptile. Between an upper and lower half coleoptile (with respect to gravity), ...

journal_title：Plant physiology

authors： Shen-Miller J

更新日期：1973-08-01 00:00:00

abstract：:Bicarbonate ion, not dissolved CO(2) gas, is shown to increase 4- to 5-fold the rate of dichlorophenol indophenol reduction by isolated maize (Zea mays) chloroplasts. Glutaraldehyde fixed chloroplasts continue to exhibit bicarbonate-dependent 2,6-dichlorophenol indophenol reduction. Bicarbonate is shown to act close t...

journal_title：Plant physiology

authors： Stemler A,Govindjee

更新日期：1973-08-01 00:00:00

abstract：:ATPase activity of plasma membranes isolated from oat (Avena sativa L. cv. Goodfield) roots was activated by divalent cations (Mg(2+) = Mn(2+) > Zn(2+) > Fe(2+) > Ca(2+)) and further stimulated by KCl and a variety of monovalent salts, both inorganic and organic. The enzyme exhibited greater specificity for cations th...

journal_title：Plant physiology

authors： Leonard RT,Hodges TK

更新日期：1973-07-01 00:00:00

abstract：:Embryos from rice (Oryza sativa L. var. Bluebonnet) and wheat (Triticum aestivum L.) contain an aminoacyl-tRNA protein transferase which transfers arginine from arginyl-tRNA to the N terminus of a protein acceptor. The activity was measured in vitro in a reaction mixture containing embryo supernatant fraction, buffer,...

journal_title：Plant physiology

authors： Manahan CO,App AA

更新日期：1973-07-01 00:00:00

abstract：:Analysis of a mutation in cotton (Gossypium hirsutum), which is maternally inherited, revealed that the completely white sectors of leaves were deficient in the 70S class ribosomes, whereas the yellow sectors exhibited the same level of the latter as in the green leaves. ...

journal_title：Plant physiology

authors： Katterman FR,Endrizzi JE

更新日期：1973-06-01 00:00:00

abstract：:Ethylene production was induced in sections of dark-grown Sorghum vulgare L. seedlings by treatment with light in the blue and far red regions of the light spectrum. The action spectrum closely resembled the previously reported spectra for high irradiance response; thus, light-induced ethylene production is probably a...

journal_title：Plant physiology

authors： Craker LE,Abeles FB,Shropshire W

更新日期：1973-06-01 00:00:00

abstract：:The influence of naturally occurring phenolic acids on phosphate uptake by barley (Hordeum vulgare L. cv. Karlsberg) roots was examined using (32)P-labeled phosphate. Without exception, all compounds tested, namely, benzoic, 2-hydroxybenzoic, 4-hydroxybenzoic, 3,4-dihydroxybenzoic, 3,4,5-trihydroxybenzoic, 4-hydroxy-3...

journal_title：Plant physiology

authors： Glass AD

更新日期：1973-06-01 00:00:00

abstract：:A purification procedure employing normal chromatographic techniques is outlined for isolating phytochrome from etiolated oat (Avena sativa L.) seedlings. Yields in excess of 20% (25 milligrams or more) of phytochrome in crude extract were obtained from 10- to 15-kilograms lots. The purified oat phytochrome had an abs...

journal_title：Plant physiology

authors： Rice HV,Briggs WR,Jackson-White CJ

更新日期：1973-05-01 00:00:00

abstract：:A study was made of diurnal trends in net photosynthetic rate and carbohydrate levels of unifoliolate leaves of soybean (Glycine max L. Merrill) under constant environmental conditions (50,000-lux light intensity, 24.5 C air temperature, 60% relative humidity, and 300 microliters of CO(2) per liter of air).Net photosy...

journal_title：Plant physiology

authors： Upmeyer DJ,Koller HR

更新日期：1973-05-01 00:00:00

abstract：:When cyclic photophosphorylation is inhibited in Chlorella vulgaris cells by carbonylcyanide-trifluoromethoxy phenylhy-drazone, photosynthetic CO(2)-fixation under anaerobic conditions exhibits a distinct lag. Under the same conditions, the light-dependent formation of ribulose diphosphate shows also this lag. It is c...

journal_title：Plant physiology

authors： Klob W,Kandler O,Tanner W

更新日期：1973-05-01 00:00:00

abstract：:Photosynthetically active bundle sheath strands capable of assimilating up to 8 micromoles CO(2) per milligram chlorophyll per hour have been isolated from fully expanded leaves of Zea mays L. Mesophyll cell contamination of the preparations was negligible, as evidenced by light and electron microscopy and by a high r...

journal_title：Plant physiology

authors： Chollet R

更新日期：1973-04-01 00:00:00

abstract：:Photoperiodic control of flowering in the short day plant Perilla involves the transmission of a floral stimulus from induced leaves to the shoot apex. We have studied the basipetal movement of this stimulus and of (14)C-labeled assimilates in plants with an induced leaf (donor) grafted into the uppermost internode of...

journal_title：Plant physiology

authors： King RW,Zeevaart JA

更新日期：1973-04-01 00:00:00

abstract：:The swelling of potato (Solanum tuberosum L.) mitochondria in isosmotic ammonium salts of phosphate, chloride, malate, succinate, and citrate was investigated by measuring light scattering. Potato mitochondria swell spontaneously in ammonium phosphate, and this swelling can be inhibited in N-ethylmaleimide. They swell...

journal_title：Plant physiology

authors： Phillips ML,Williams GR

更新日期：1973-04-01 00:00:00

abstract：:The 2- to 4-fold rise in particle-bound beta-glucan synthetase (uridine diphosphate-glucose: beta-1, 4-glucan glucosyltransferase) activity that can be induced by indoleacetic acid in pea stem tissue is not prevented by concentrations of actinomycin D or cycloheximide that inhibit growth and macromolecule synthesis. T...

journal_title：Plant physiology

authors： Ray PM

更新日期：1973-04-01 00:00:00

abstract：:The influence of light on asexual fruiting and mycelial growth of Phycomyces blakesleeanus Burgeff was studied by means of fruiting body counts and size measurements in cultures on solid media under varied incubation conditions. Five types of photoresponses were shown by ATCC Strain 8743a: (a) photoinduction of giant ...

journal_title：Plant physiology

authors： Thornton RM

更新日期：1973-03-01 00:00:00

abstract：:Effects of O(2) and some respiratory inhibitors on the induction and release of bud dormancy were examined with the aerial tubers of different ages of Begonia evansiana Andr. Oxygen was needed not only for tuber sprouting but also during the chilling process at 2 to 5 C to break tuber dormancy. If the mature tubers we...

journal_title：Plant physiology

authors： Esashi Y,Nagao M

更新日期：1973-03-01 00:00:00

abstract：:Endosperm liquid bathes the embryo of Phaseolus vulgaris from the heart stage through the late cotyledon state. This liquid was aspirated from many ovules of the same stage, pooled, and analyzed for the following constituents and parameters: [List: see text]. ...

journal_title：Plant physiology

authors： Smith JG

更新日期：1973-03-01 00:00:00

abstract：:The permeability of the Chlorella pyrenoidosa membrane was studied by following the efflux of (14)C-intracellular material from cells which had been allowed to incorporate (14)CO(2) photosynthetically. It was observed that the efflux increased upon treatment with low concentrations (3-30 muM) of 2, 3-dichloro-1, 4-nap...

journal_title：Plant physiology

authors： Sikka HC,Saxena J,Zweig G

更新日期：1973-02-01 00:00:00

abstract：:Short exposure of the spores of Cheilanthes farinosa to low intensity red light promotes their germination, which is not reversed by a subsequent exposure to far red light. Germination is, however, inhibited by blue light administered before or after red light. Inhibition of germination by blue light is annulled by ex...

journal_title：Plant physiology

authors： Raghavan V

更新日期：1973-02-01 00:00:00

abstract：:Synchronous cell division in Euglena gracilis (strain Z) was obtained in 24-hour light cycles consisting of 10 hours of light and 14 hours of darkness; cell division was restricted to the dark period. Photosynthetic capacity was found to vary in a cyclic manner during the cell cycle, reaching a peak 2 hours before the...

journal_title：Plant physiology

authors： Walther WG,Edmunds LN

更新日期：1973-02-01 00:00:00

abstract：:Five blue-green and one red algal species produced carbon monoxide during photosynthetic growth. The blue-green algae synthesized CO and phycocyanobilin in equimolar quantities at identical rates. The red alga, Porphyridium cruentum, incorporated Delta-aminolevulinic acid-5-(14)C into phycoerythrobilin and CO. The rat...

journal_title：Plant physiology

authors： Troxler RF,Dokos JM

更新日期：1973-01-01 00:00:00

abstract：:When the midribs of untreated traps of Dionaea muscipula are frozen in liquid nitrogen after rapid closure, they contain significantly less ATP than those frozen before closure. Exogenous ATP causes a significant increase in the rate of mechanically stimulated trap closure. Illuminated traps close faster than those ke...

journal_title：Plant physiology

authors： Jaffe MJ

更新日期：1973-01-01 00:00:00

abstract：:Mevalonic acid-2-(14)C was readily incorporated into the free, esterified, and glycosidic sterol fractions of tobacco (Nicotiana tabacum L. var. Burley 21) seedlings. The time course of mevalonic acid-2-(14)C incorporation was different for the various individual sterols. Campesterol and sitosterol (group I) became ra...

journal_title：Plant physiology

authors： Bush PB,Grunwald C

更新日期：1973-01-01 00:00:00

abstract：:These studies were conducted to determine whether ethylene serves as a natural regulator of fruit wall dehiscence, a major visible feature of ripening in some fruits. We employed treatments to inhibit ethylene action or remove ethylene and observed their effect on fruit dehiscence. CO(2) (13%), a competitive inhibitor...

journal_title：Plant physiology

authors： Lipe JA,Morgan PW

更新日期：1972-12-01 00:00:00