abstract：:Plant-atmosphere NH(3) exchange was studied in white clover (Trifolium repens L. cv. Seminole) growing in nutrient solution containing 0 (N(2) based), 0.5 (low N) or 4.5 (high N) mM NO(3)(-). The aim was to show whether the NH(3) exchange potential is influenced by the proportion of N(2) fixation relative to NO(3)(-) ...

journal_title：Journal of experimental botany

authors： Herrmann B,Mattsson M,Fuhrer J,Schjoerring JK

更新日期：2002-01-01 00:00:00

abstract：:Carbohydrate metabolism was investigated during spruce somatic embryogenesis. During the period of maintenance corresponding to the active phase of embryogenic tissue growth, activities of soluble acid invertase and alkaline invertase increased together with cellular glucose and fructose levels. During the same time, ...

journal_title：Journal of experimental botany

authors： Iraqi D,Tremblay FM

更新日期：2001-12-01 00:00:00

abstract：:The effect of growing pea (Pisum sativum L.) plants with CdCl(2) (0-50 microM) on different plant physiological parameters and antioxidative enzymes of leaves was studied in order to know the possible involvement of this metal in the generation of oxidative stress. In roots and leaves of pea plants Cd produced a signi...

journal_title：Journal of experimental botany

authors： Sandalio LM,Dalurzo HC,Gómez M,Romero-Puertas MC,del Río LA

更新日期：2001-11-01 00:00:00

abstract：:The transition from reversible to permanent wilting, in whole tomato seedlings (Lycopersicon esculentum Mill. cv. M82) following severe salt-stress by root exposure to 300 mM NaCl, was investigated. Salinized seedlings wilted rapidly but recovered if returned to non-saline nutrient solution within 6 h. However, after ...

journal_title：Journal of experimental botany

authors： Shalata A,Neumann PM

更新日期：2001-11-01 00:00:00

abstract：:This paper gives a summary of a project to characterize a tobacco aquaporin. The cDNA and gene, including the 5' upstream region, for the tobacco aquaporin NtAQP1 has been isolated and the encoded protein characterized. The significance of promoter regions for an abscisic acid- and gibberellic acid-induced gene expres...

journal_title：Journal of experimental botany

authors： Siefritz F,Biela A,Eckert M,Otto B,Uehlein N,Kaldenhoff R

更新日期：2001-10-01 00:00:00

abstract：:Parasitic plants form intimate contacts with host tissue in order to gain access to host solutes. There are a variety of cell types within the host which parasitic plants could access to extract solutes. Depending on the degree to which the parasite has embraced the parasitic lifestyle, the extent of solute flux and t...

journal_title：Journal of experimental botany

authors： Hibberd JM,Jeschke WD

更新日期：2001-10-01 00:00:00

abstract：:Axenically grown Arabidopsis thaliana plants were analysed for the occurrence of trehalose. Using gas chromatography-mass spectrometry (GC-MS) analysis, trehalose was unambiguously identified in extracts from Arabidopsis inflorescences. In a variety of organisms, the synthesis of trehalose is catalysed by trehalose-6-...

journal_title：Journal of experimental botany

authors： Vogel G,Fiehn O,Jean-Richard-dit-Bressel L,Boller T,Wiemken A,Aeschbacher RA,Wingler A

更新日期：2001-09-01 00:00:00

abstract：:Nutrient requirements for plant growth are expected to rise in response to the predicted changes in CO(2) and temperature. In this context, little attention has been paid to the effects of soil temperature, which limits plant growth at early stages in temperate regions. A factorial growth-room experiment was conducted...

journal_title：Journal of experimental botany

authors： Gavito ME,Curtis PS,Mikkelsen TN,Jakobsen I

更新日期：2001-09-01 00:00:00

abstract：:Oilseed rape (Brassica napus L.) is commonly grown for oil or bio-fuel production, while the seed residues can be used for animal feed. It can also be grown as a catch crop because of its efficiency in extracting mineral N from the soil profile. However, the N harvest index is usually low, due in part to a low ability...

journal_title：Journal of experimental botany

authors： Rossato L,Lainé P,Ourry A

更新日期：2001-08-01 00:00:00

abstract：:A cDNA clone was selected as a candidate for the catalytic subunit of phospho-pyruvate dehydrogenase phosphatase (PDP) by screening a Zea mays expressed sequence tag database with the bovine PDP deduced amino acid sequence. Both strands of the cDNA were completely sequenced. The maize clone contains an open reading fr...

journal_title：Journal of experimental botany

authors： Broz AK,Thelen JJ,Muszynski MG,Miernyk JA,Randall DD

更新日期：2001-08-01 00:00:00

abstract：:Primary adhesion of zoospores of the green macroalga Enteromorpha to substrata involves a massive release of adhesive glycoproteins from Golgi-derived, membrane-bounded vesicles in the anterior region of the spore, followed by rapid curing. This process is sensitive to low concentrations (5-10 microg x ml(-1)) of the ...

journal_title：Journal of experimental botany

authors： Callow ME,Crawford S,Wetherbee R,Taylor K,Finlay JA,Callow JA

更新日期：2001-07-01 00:00:00

abstract：:Assessment of dormancy inception, maintenance and release was studied for artificially dried immature seeds harvested throughout seed development in the barley cv. Triumph and its mutant line TL43. Each was grown in Spain and Scotland under low and high dormancy inducing conditions, respectively. Both TL43 and Triumph...

journal_title：Journal of experimental botany

authors： Romagosa I,Prada D,Moralejo MA,Sopena A,Muñoz P,Casas AM,Swanston JS,Molina-Cano JL

更新日期：2001-07-01 00:00:00

abstract：:The promoter of the Arabidopsis thaliana L. AtEm1 gene encoding a late embryogenesis abundant protein was fused to the beta-glucuronidase reporter gene and introduced into Brassica napus. The promoter is highly active in the vascular tissues of embryo and pollen grains and also active in petals, sepals, caulinar leave...

journal_title：Journal of experimental botany

authors： Vicient CM,Gruber V,Delseny M

更新日期：2001-07-01 00:00:00

abstract：:14C-salicylic acid (SA) was used to monitor SA metabolism and its regulation in tobacco cell suspension culture. Two SA concentrations (20 microM and 200 microM) were used for comparison. SA was quickly taken up in both treatments, and the 200 microM-treated cells absorbed approximately 15 times that of 20 microM-trea...

journal_title：Journal of experimental botany

authors： Chen HJ,Hou WC,Kuć J,Lin YH

更新日期：2001-06-01 00:00:00

abstract：:Plants of Lolium perenne were grown in sterile solution culture. 15N-labelled glycine (Gly) coupled with gas chromatograph mass spectrometry was used to prove that non-mycorrhizal plants of L. perenne are capable of acquiring N in the form of intact Gly. It was estimated that a minimum of 80% of Gly-N uptake, over a 3...

journal_title：Journal of experimental botany

authors： Thornton B

更新日期：2001-06-01 00:00:00

abstract：:Intact coconuts were germinated in situ and compared with excised zygotic embryos germinated in vitro. The growth of the embryonic tissue and their fatty acid compositions were measured. Haustoria, plumules and radicles of coconuts germinated in situ grew continuously and proportionately throughout the 120 d experimen...

journal_title：Journal of experimental botany

authors： López-Villalobos A,Dodds PF,Hornung R

更新日期：2001-05-01 00:00:00

abstract：:Dionaea is a highly specialized carnivorous plant species with a unique mechanism for insect capture. The leaf is converted into an osmotically driven trap that closes when an insect triggers sensory trichomes. This study investigates the significance of insect capture for growth of Dionaea at different successional s...

journal_title：Journal of experimental botany

authors： Schulze W,Schulze ED,Schulze I,Oren R

更新日期：2001-05-01 00:00:00

abstract：:The effect of water stress on the early seedling growth of onions was studied by placing newly-germinated seedlings in vermiculite equilibrated at different water potentials. Roots and shoots elongated more at -0.29 than at -0.64 MPa, but did not elongate at -1.66 MPa. However, roots and shoots of seedlings that had b...

journal_title：Journal of experimental botany

authors： Whalley WR,Lipiec J,Finch-Savage WE,Cope RE,Clark LJ,Rowse HR

更新日期：2001-05-01 00:00:00

abstract：:By using a fine oil-filled glass microcapillary mounted on a micromanipulator, the solutes of individual plant cells can be sampled. These samples can then be analysed using a range of physical and chemical methods. Hydrostatic pressure (cell pressure probe), osmotic pressure (picolitre osmometer), organic solutes (en...

journal_title：Journal of experimental botany

authors： Tomos AD,Sharrock RA

更新日期：2001-04-01 00:00:00

abstract：:The short-term effects of sodium azide (NaN(3)) on water flow in red-osier dogwood (Cornus stolonifera Michx.) seedlings were examined in excised roots at a constant pressure of 0.3 MPa. NaN(3) significantly decreased root water flow rates (Q(v)). It also induced a significant reduction in root respiration and reduced...

journal_title：Journal of experimental botany

authors： Kamaluddin M,Zwiazek JJ

更新日期：2001-04-01 00:00:00

abstract：:An extensive literature reports that Cs(+), an environmental contaminant, enters plant cells through K(+) transport systems. Several recently identified plant K(+) transport systems are permeable to Cs(+). Permeation models indicate that most Cs(+) uptake into plant roots under typical soil ionic conditions will be me...

journal_title：Journal of experimental botany

authors： Broadley MR,Escobar-Gutiérrez AJ,Bowen HC,Willey NJ,White PJ

更新日期：2001-04-01 00:00:00

abstract：:To obtain and concentrate reduced N from the environment, plants have evolved a diverse array of adaptations to utilize soil, biotic and atmospheric N. In symbiotic N(2)-fixing systems the potential for oversupply exists and regulation of activity to match demand is crucial. N status in plants is likely to be most str...

journal_title：Journal of experimental botany

authors： Parsons R,Sunley RJ

更新日期：2001-03-01 00:00:00

abstract：:Studies of the hydraulic properties of xylem vessels have been limited to measurements of whole plant or whole stem segments. This approach allows the longitudinal transport properties of the ensemble of vessels within a stem to be determined, but provides little information on radial transport. Here the xylem of Frax...

journal_title：Journal of experimental botany

authors： Zwieniecki MA,Melcher PJ,Holbrook NM

更新日期：2001-02-01 00:00:00

abstract：:Sunflower (Helianthus annuus L. cv. SH222) plants and calli were exposed to KCl stress for three weeks. Calli were more tolerant to KCl than plants. KCl stress decreased NO(-)(3), Mn, Fe and B levels in whole plants and P, Ca and Mg in shoots. NO(-)(3), P, Ca, Mg, Mn, and B levels decreased in 100 mM-stressed calli. C...

journal_title：Journal of experimental botany

authors： Santos CL,Campos A,Azevedo H,Caldeira G

更新日期：2001-02-01 00:00:00

abstract：:The response of both specific (ascorbate peroxidase, APX) and unspecific (POD) peroxidases and H(2)O(2) content of sunflower plants (Helianthus annuus L. cv. Hor) grown hydroponically with (C) or without (-Fe) iron in the nutrient solution were analysed to verify whether iron deficiency led to cell oxidative status. I...

journal_title：Journal of experimental botany

authors： Ranieri A,Castagna A,Baldan B,Soldatini GF

更新日期：2001-01-01 00:00:00

abstract：:Hydroponically grown spinach plants were deprived of an external source of sulphate after an initial period when the S-supply was sufficient. The time-course of events following this treatment was monitored. The first responses were found in the uptake and translocation of NO(3)(-) and the uptake of SO(4)(2-). The for...

journal_title：Journal of experimental botany

authors： Prosser IM,Purves JV,Saker LR,Clarkson DT

更新日期：2001-01-01 00:00:00

abstract：:Many plant species and/or genotypes are highly recalcitrant to Agrobacterium-mediated genetic transformation, and yet little is known about this phenomenon. Using several Arabidopsis genotypes/ecotypes, the results of this study indicated that phytohormone pretreatment could overcome this recalcitrance by increasing t...

journal_title：Journal of experimental botany

authors： Chateau S,Sangwan RS,Sangwan-Norreel BS

更新日期：2000-12-01 00:00:00

abstract：:Although the role of the gynoecium in natural senescence of the carnation flower has long been suggested, it has remained a matter of dispute because petal senescence in the cut carnation flower was not delayed by the removal of gynoecium. In this study, the gynoecium was snapped off by hand, in contrast to previous i...

journal_title：Journal of experimental botany

authors： Shibuya K,Yoshioka T,Hashiba T,Satoh S

更新日期：2000-12-01 00:00:00

abstract：:An experiment was designed to apply a controlled bending to a tomato stem and simultaneously to measure its effect on stem elongation. Stem elongation was measured over 2 d until steady and equal rates were obtained for the control and the treated plants. Thereafter, the basal part of the stem was submitted to a trans...

journal_title：Journal of experimental botany

authors： Coutand C,Julien JL,Moulia B,Mauget JC,Guitard D

更新日期：2000-11-01 00:00:00

abstract：:Two cultivars of spring wheat (Triticum aestivum L.) were grown to maturity in hydroponic cultures. Nitrogen accumulation was controlled by daily growth-limiting additions of nitrate together with all other nutrients in excess. Six different curves of N accumulation were used, with the same relative changes from day t...

journal_title：Journal of experimental botany

authors： Oscarson P

更新日期：2000-11-01 00:00:00

abstract：:Many biotypes of the northern-hemisphere Arctic-Alpine grass Poa alpina L. reproduce asexually via prolification of the spikelet axis to produce dehiscing shoots. Although capable of photosynthesis, the source-sink characteristics of these synflorescence systems are unknown, including the degree to which plantlets fro...

journal_title：Journal of experimental botany

authors： Pierce S,Stirling CM,Baxter R

更新日期：2000-10-01 00:00:00

abstract：:Rapid changes in turgor pressure (P:) and temperature (T:) are giving new information about the mechanisms of plant growth. In the present work, single internode cells of the large-celled alga Chara corallina were used as a model for plant growth. P was changed without altering the chemical environment of the wall whi...

journal_title：Journal of experimental botany

authors： Proseus TE,Zhu GL,Boyer JS

更新日期：2000-09-01 00:00:00

abstract：:Water transport is an integral part of the process of growth by cell expansion and accounts for most of the increase in cell volume characterizing growth. Under water deficiency, growth is readily inhibited and growth of roots is favoured over that of leaves. The mechanisms underlying this differential response are ex...

journal_title：Journal of experimental botany

authors： Hsiao TC,Xu LK

更新日期：2000-09-01 00:00:00

abstract：:The role of abscisic acid (ABA) in the weakening of the endosperm cap prior to radicle protrusion in tomato (Lycopersicon esculentum Mill. cv. Moneymaker) seeds was studied. The endosperm cap weakened substantially in both water and ABA during the first 38 h of imbibition. After 38 h the force required for endosperm c...

journal_title：Journal of experimental botany

authors： Toorop PE,van Aelst AC,Hilhorst HW

更新日期：2000-08-01 00:00:00

abstract：:Ureides dramatically accumulate in shoots of N(2)-fixing soybean (Glycine max L. Merr.) under water deficit and this accumulation is higher in cultivars that have N(2) fixation that is sensitive to water deficit. One possible explanation is that ureide accumulation is associated with a feedback inhibition of nitrogena...

journal_title：Journal of experimental botany

authors： Vadez V,Sinclair TR

更新日期：2000-08-01 00:00:00

abstract：:Transient kinetics of net H+, K+, Ca2+, and Cl- fluxes were measured non-invasively, using an ion-selective microelectrode technique, for bean (Vicia faba L.) leaf mesophyll in response to 150 mM mannitol treatment. In a parallel set of experiments, changes in the plasma membrane potential and the total proline conten...

journal_title：Journal of experimental botany

authors： Shabala S,Babourina O,Newman I

更新日期：2000-07-01 00:00:00

abstract：:Leaves and callus of Kalanchoë daigremontiana and Taxus brevifolia were used to investigate nitric oxide-induced apoptosis in plant cells. The effect of nitric oxide (NO) was studied by using a NO donor, sodium nitroprusside (SNP), a nitric oxide-synthase (NOS) inhibitor, N:(G)-monomethyl-L-arginine (NMMA), and centri...

journal_title：Journal of experimental botany

authors： Pedroso MC,Magalhaes JR,Durzan D

更新日期：2000-06-01 00:00:00

abstract：:Seed germination is often induced by a pulse of red light perceived by phytochrome and cancelled by a subsequent pulse of far-red light. When the pulse of red light is followed by several hours of darkness, a pulse of far-red light is no longer effective and prolonged far-red is necessary to block germination. The aim...

journal_title：Journal of experimental botany

authors： de Miguel L,Burgin MJ,Casal JJ,Sánchez RA

更新日期：2000-06-01 00:00:00

abstract：:Plant cell elongation depends on the physical properties of the primary cell wall. Because xyloglucan endotransglycosylases (XETs) are enzymes that mediate cleavage and rejoining of the beta(1-4)-XG backbone of primary cell wall, they are potentially involved in cell elongation. In this paper, the growth of the barley...

journal_title：Journal of experimental botany

authors： Burstin J

更新日期：2000-05-01 00:00:00

abstract：:Abscisic acid conjugate concentrations increased in barley xylem sap under salinity, whereas it remained at a low level in the intercellular washing fluid (IWF) of barley primary leaves (Hordeum vulgare cv. Gerbel). Here it is shown that IWF contains beta-glucosidase activity which releases abscisic acid (ABA) from th...

journal_title：Journal of experimental botany

authors： Dietz KJ,Sauter A,Wichert K,Messdaghi D,Hartung W

更新日期：2000-05-01 00:00:00