Abstract:
:Previous studies have shown that the monoterpene ketone l-[G-(3)H] menthone is reduced to the epimeric alcohols l-menthol and d-neomenthol in leaves of flowering peppermint (Mentha piperita L.), and that a portion of the menthol is converted to menthyl acetate while the bulk of the neomenthol is transformed to neomenthyl-beta-d-glucoside which is then transported to the rhizome (Croteau, Martinkus 1979 Plant Physiol 64: 169-175). Analysis of the disposition of l-[G-(3)H]menthone applied to midstem leaves of intact flowering plants allowed the kinetics of synthesis and transport of the monoterpenyl glucoside to be determined, and gave strong indication that the glucoside was subsequently metabolized in the rhizome. Studies with d-[G-(3)H]neomenthyl-beta-d-glucoside as substrate, using excised rhizomes or rhizome segments, confirmed the hydrolysis of the glucoside as an early step in metabolism at this site, and revealed that the terpenoid moiety was further converted to a series of ether-soluble, methanol-soluble, and water-soluble products. Studies with d-[G-(3)H]neomenthol as the substrate, using excised rhizomes, showed the subsequent metabolic steps to involve oxidation of the alcohol back to menthone, followed by an unusual lactonization reaction in which oxygen is inserted between the carbonyl carbon and the carbon bearing the isopropyl group, to afford 3,4-menthone lactone. The conversion of menthone to the lactone, and of the lactone to more polar products, were confirmed in vivo using l-[G-(3)H]menthone and l-[G-(3)H]-3,4-menthone lactone as substrates. Additional oxidation products were formed in vivo via the desaturation of labeled neomenthol and/or menthone, but none of these transformations appeared to lead to ring opening of the p-menthane skeleton. Each step in the main reaction sequence, from hydrolysis of neomenthyl glucoside to lactonization of menthone, was demonstrated in cell-free extracts from the rhizomes of flowering mint plants. The lactonization step is of particular significance in providing a means of cleaving the p-menthane ring to afford an acyclic carbon skeleton that can be further degraded by modifications of the well-known beta-oxidation sequence.
journal_name
Plant Physioljournal_title
Plant physiologyauthors
Croteau R,Sood VK,Renstrøm B,Bhushan Rdoi
10.1104/pp.76.3.647subject
Has Abstractpub_date
1984-11-01 00:00:00pages
647-53issue
3eissn
0032-0889issn
1532-2548journal_volume
76pub_type
杂志文章相关文献
PLANT PHYSIOLOGY文献大全abstract::Four legume species (four genera) were examined and found to contain hemagglutinins with properties similar to those which we have previously described for the enzymic hemagglutinin in Vigna radiata. Examination of extracts by gel filtration and ion exchange chromatography showed that an alpha-galactosidase activity e...
journal_title:Plant physiology
pub_type: 杂志文章
doi:10.1104/pp.65.4.618
更新日期:1980-04-01 00:00:00
abstract::Three novel beta-xylan xylanohydrolases capable of dissociating ferulated arabinoxylan (Feraxan) from maize (Zea mays L. hybrid B73 x Mo17) coleoptile sections and two conventional beta-xylan xylanohydrolases (xylanases) were purified from a Bacillus subtilis industrial enzyme preparation (Novo Ban L-120). The Feraxan...
journal_title:Plant physiology
pub_type: 杂志文章
doi:10.1104/pp.87.4.883
更新日期:1988-08-01 00:00:00
abstract::Purified glutamine synthetase from pea seedlings was most active with Mg(2+) as the metal activator, but Mn(2+) and Co(2+) were 45 to 60% and 30 to 45% as effective, respectively, when assayed at the optimal pH for each cation. The Mg(2+) saturation curve was quite sigmoid, and evidence indicates that MgATP is the act...
journal_title:Plant physiology
pub_type: 杂志文章
doi:10.1104/pp.54.5.773
更新日期:1974-11-01 00:00:00
abstract::The petunia (Petunia [Mitchell]) chloroplast proteins, the chlorophyll a/b-binding (Cab) proteins, and the small subunit of ribulose bisphosphate carboxylase (RbcS) are encoded by nuclear genes that are expressed in a light-dependent manner. The steady-state concentrations of five cab mRNAs vary with a dramatic circad...
journal_title:Plant physiology
pub_type: 杂志文章
doi:10.1104/pp.89.3.776
更新日期:1989-03-01 00:00:00
abstract::Mitochondria from cotyledons of Vigna sesquipedalis (L.) Fruwirth (starchy seed) showed no NAD-isocitric dehydrogenase (NAD-IDH) activity by the methods which have been known to be useful for the detection of NAD-IDH in mitochondria of plants including castor bean and alaska pea. When the Vigna cotyledon mitochondria ...
journal_title:Plant physiology
pub_type: 杂志文章
doi:10.1104/pp.44.2.262
更新日期:1969-02-01 00:00:00
abstract::Salinity-induced alterations in tomato (Lypersicon esculentum Mill. cv Heinz 1350) root plasma membrane properties were studied and characterized using a membrane vesicle system. Equivalent rates of MgATP-dependent H(+)-transport activity were measured by quinacrine fluorescence (DeltapH) in plasma membrane vesicles i...
journal_title:Plant physiology
pub_type: 杂志文章
doi:10.1104/pp.93.2.471
更新日期:1990-06-01 00:00:00
abstract::Saponaria vaccaria (Caryophyllaceae), a soapwort, known in western Canada as cowcockle, contains bioactive oleanane-type saponins similar to those found in soapbark tree (Quillaja saponaria; Rosaceae). To improve our understanding of the biosynthesis of these saponins, a combined polymerase chain reaction and expresse...
journal_title:Plant physiology
pub_type: 杂志文章
doi:10.1104/pp.106.088484
更新日期:2007-02-01 00:00:00
abstract::The seeds of lettuce (Lactuca sativa L. cv. Grand Rapids) germinate in darkness at 25 C when treated by gibberellic acid (GA(3)) for 1 hour following 2 hours of imbibition. The time of GA(3) application influences the rate and the final percentage of seeds that germinate. In contrast, red light illumination given at d...
journal_title:Plant physiology
pub_type: 杂志文章
doi:10.1104/pp.60.4.575
更新日期:1977-10-01 00:00:00
abstract::Stomatal transpiration is at the center of a crisis in water availability and crop production that is expected to unfold over the next 20 to 30 years. Global water usage has increased 6-fold in the past 100 years, twice as fast as the human population, and is expected to double again before 2030, driven mainly by irri...
journal_title:Plant physiology
pub_type: 杂志文章
doi:10.1104/pp.113.233403
更新日期:2014-04-01 00:00:00
abstract::Peptide substrates of well-defined protein kinases were microinjected into aleurone protoplasts of barley (Hordeum vulgare L. cv Himalaya) to inhibit, and therefore identify, protein kinase-regulated events in the transduction of the gibberellin (GA) and abscisic acid signals. Syntide-2, a substrate designed for Ca2+-...
journal_title:Plant physiology
pub_type: 杂志文章
doi:10.1104/pp.116.2.765
更新日期:1998-02-01 00:00:00
abstract::The effects of representative respiratory inhibitors were investigated on the coupled respiration of mung bean mitochondria using succinate and l-malate as substrates. The inhibitors studied were: (I) malonate, (II) amytal and rotenone, (III) antimycin A and 2-n-nonyl-4-hydroxyquinoline N-oxide (NOQNO), and (IV) cyani...
journal_title:Plant physiology
pub_type: 杂志文章
doi:10.1104/pp.42.11.1535
更新日期:1967-11-01 00:00:00
abstract::The rates of absorption and metabolism of 3-amino-2,5-dichlorobenzoic acid (amiben) were investigated in 3-day-old roots of amiben-sensitive velvetleaf (Abutilon theophrasti Medic.) and amiben-tolerant morningglory [Ipomoea hederacea (L.) Jacq.].The initial rates of amiben absorption and binding were identically conce...
journal_title:Plant physiology
pub_type: 杂志文章
doi:10.1104/pp.44.6.854
更新日期:1969-06-01 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
pub_type: 杂志文章
doi:10.1104/pp.100.4.2002
更新日期:1992-12-01 00:00:00
abstract::Researchers have long endeavored to produce modified fatty acids in easily managed crop plants where they are not natively found. An important step toward this goal has been the biosynthesis of these valuable products in model oilseeds. The successful production of such fatty acids has revealed barriers to the broad a...
journal_title:Plant physiology
pub_type: 杂志文章
doi:10.1104/pp.17.01805
更新日期:2018-06-01 00:00:00
abstract::To acquire iron, many plant species reduce soil Fe(III) to Fe(II) by Fe(III)-chelate reductases embedded in the plasma membrane of root epidermal cells. The reduced product is then taken up by Fe(II) transporter proteins. These activities are induced under Fe deficiency. We describe here the FRO1 gene from pea (Pisum ...
journal_title:Plant physiology
pub_type: 杂志文章
doi:10.1104/pp.010829
更新日期:2002-05-01 00:00:00
abstract::Light-induced conversion of NAD to NADP was investigated in higher plants. Upon illumination, conversion of NAD to NADP was observed in intact leaves of wheat and pea following incubation in the dark. This conversion was also observed in mesophyll protoplasts of wheat leaves when they were isolated in the dark or isol...
journal_title:Plant physiology
pub_type: 杂志文章
doi:10.1104/pp.68.2.324
更新日期:1981-08-01 00:00:00
abstract::p40s are acidic proteins of eukaryotic cells occurring either free in the cytoplasm or in association with ribosomes, the latter occurring in both monosomes and polysomes. p40s may play a role in the regulation of protein synthesis, although the exact mechanism is not known. Leaves of all 10 plant species examined her...
journal_title:Plant physiology
pub_type: 杂志文章
doi:10.1104/pp.111.2.559
更新日期:1996-06-01 00:00:00
abstract::To determine the driving forces for symplastic sugar flux between mesophyll and phloem, gradients of sugar concentrations and osmotic pressure were studied in leaf tissues of two Scrophulariaceae species, Alonsoa meridionalis and Asarina barclaiana. A. meridionalis has a typical symplastic configuration of minor-vein ...
journal_title:Plant physiology
pub_type: 杂志文章
doi:10.1104/pp.105.068312
更新日期:2006-01-01 00:00:00
abstract::In earlier ecophysiological studies that were conducted on Arabidopsis halleri plants, scientists focused on the mechanisms of Cd and Zn hyperaccumulation but did not take into consideration the environmental factors that can significantly affect the physiological responses of plants in situ. In this study, we investi...
journal_title:Plant physiology
pub_type: 杂志文章
doi:10.1104/pp.17.00212
更新日期:2017-09-01 00:00:00
abstract::Responses of superoxide dismutase (EC 1.15.1.1) and glutathione reductase (EC 1.6.4.2) activities were evaluated in leaf tissue from intact cotton plants (Cotton Branch 1697) which were exposed to 75% O(2), 350 microliters per liter CO(2) for 48 hours. Soluble protein was extracted from O(2)-treated and control tissue...
journal_title:Plant physiology
pub_type: 杂志文章
doi:10.1104/pp.66.3.482
更新日期:1980-09-01 00:00:00
abstract::When fully filled pods of bean plants were deseeded, the rate of axillary bud growth and the chlorophyll content of leaves were increased. Application of 0.1% indoleacetic acid (IAA) in lanolin on the deseeded pods caused abscission of axillary buds, inhibited growth of the remaining buds, and decreased leaf chlorophy...
journal_title:Plant physiology
pub_type: 杂志文章
doi:10.1104/pp.68.2.476
更新日期:1981-08-01 00:00:00
abstract::Starch biosynthetic enzymes from maize (Zea mays) and wheat (Triticum aestivum) amyloplasts exist in cell extracts in high molecular weight complexes; however, the nature of those assemblies remains to be defined. This study tested the interdependence of the maize enzymes starch synthase IIa (SSIIa), SSIII, starch bra...
journal_title:Plant physiology
pub_type: 杂志文章
doi:10.1104/pp.109.135293
更新日期:2009-03-01 00:00:00
abstract::SHORT-ROOT (SHR) and SCARECROW (SCR) are required for stem cell maintenance in the Arabidopsis (Arabidopsis thaliana) root meristem, ensuring its indeterminate growth. Mutation of SHR and SCR genes results in disorganization of the quiescent center and loss of stem cell activity, resulting in the cessation of root gro...
journal_title:Plant physiology
pub_type: 杂志文章
doi:10.1104/pp.110.158857
更新日期:2010-11-01 00:00:00
abstract::The sugar compositions of root hairs of a variety of plant species were determined. Root hairs of legumes had very similar compositions, whereas those of different families varied widely. Only approximately 50% of the weight of the root hairs of legumes could be accounted for by sugar. Up to 80% of the weight of root ...
journal_title:Plant physiology
pub_type: 杂志文章
doi:10.1104/pp.86.2.638
更新日期:1988-02-01 00:00:00
abstract::We used pulsed-field gel electrophoresis and restriction fragment mapping to analyze the structure of Medicago truncatula chloroplast DNA (cpDNA). We find most cpDNA in genome-sized linear molecules, head-to-tail genomic concatemers, and complex branched forms with ends at defined sites rather than at random sites as ...
journal_title:Plant physiology
pub_type: 杂志文章
doi:10.1104/pp.107.112946
更新日期:2008-03-01 00:00:00
abstract::Phosphate (Pi) deficiency strongly limits plant growth, and plant roots foraging the soil for nutrients need to adapt to optimize Pi uptake. Ca2+ is known to signal in root development and adaptation but has to be tightly controlled, as it is highly toxic to Pi metabolism. Under Pi starvation and the resulting decreas...
journal_title:Plant physiology
pub_type: 杂志文章
doi:10.1104/pp.18.01469
更新日期:2019-04-01 00:00:00
abstract::The relationship between the amount of light and the amount of response for any photobiological process can be based on the number of incident quanta per unit time (fluence rate-response) or on the number of incident quanta during a given period of irradiation (fluence-response). Fluence-response and fluence rate-r...
journal_title:Plant physiology
pub_type: 杂志文章
doi:10.1104/pp.94.4.1605
更新日期:1990-01-01 00:00:00
abstract::The uptake of cadmium by excised root tissue of barley (Hordeum vulgare L. cv. Arivat) was investigated with respect to kinetics, concentration, and interactions with various cations. The role of metabolism in Cd absorption was examined using a range of temperatures, anaerobic treatments, and chemical inhibitors. The ...
journal_title:Plant physiology
pub_type: 杂志文章
doi:10.1104/pp.54.1.67
更新日期:1974-07-01 00:00:00
abstract::Temperature has a large impact on plant immune responses. Earlier studies identified intracellular immune receptor nucleotide-binding leucine-rich repeat (NLR) genes and salicylic acid (SA) as targets of high-temperature inhibition of plant immunity. Here, we report that moderately low temperature enhances immunity to...
journal_title:Plant physiology
pub_type: 杂志文章
doi:10.1104/pp.19.01130
更新日期:2020-01-01 00:00:00
abstract::To examine the role of isoamylase1 (ISA1) in amylopectin biosynthesis in plants, a genomic DNA fragment from Aegilops tauschii was introduced into the ISA1-deficient rice (Oryza sativa) sugary-1 mutant line EM914, in which endosperm starch is completely replaced by phytoglycogen. A. tauschii is the D genome donor of w...
journal_title:Plant physiology
pub_type: 杂志文章
doi:10.1104/pp.104.051359
更新日期:2005-01-01 00:00:00