Abstract:
:alpha-Amylases are important enzymes for starch degradation in plants. However, it has been a long-running debate as to whether alpha-amylases are localized in plastids where starch is stored. To study the subcellular localization of alpha-amylases in plant cells, a rice (Oryza sativa) alpha-amylase, alphaAmy3, with or without its own signal peptide (SP) was expressed in transgenic tobacco (Nicotiana tabacum) and analyzed. Loss-of-function analyses revealed that SP was required for targeting of alphaAmy3 to chloroplasts and/or amyloplasts and cell walls and/or extracellular compartments of leaves and suspension cells. SP was also required for in vitro transcribed and/or translated alphaAmy3 to be cotranslationally imported and processed in canine microsomes. alphaAmy3, present in chloroplasts of transgenic tobacco leaves, was processed to a product with Mr similar to alphaAmy3 minus its SP. Amino acid sequence analysis revealed that the SP of chloroplast localized alphaAmy3 was cleaved at a site only one amino acid preceding the predicted cleavage site. Function of the alphaAmy3 SP was further studied by gain-of-function analyses. beta-Glucuronidase (GUS) and green fluorescence protein fused with or without the alphaAmy3 SP was expressed in transgenic tobacco or rice. The alphaAmy3 SP directed translocation of GUS and green fluorescence protein to chloroplasts and/or amyloplasts and cell walls in tobacco leaves and rice suspension cells. The SP of another rice alpha-amylase, alphaAmy8, similarly directed the dual localizations of GUS in transgenic tobacco leaves. This study is the first evidence of SP-dependent dual translocations of proteins to plastids and extracellular compartments, which provides new insights into the role of SP in protein targeting and the pathways of SP-dependent protein translocation in plants.
journal_name
Plant Physioljournal_title
Plant physiologyauthors
Chen MH,Huang LF,Li HM,Chen YR,Yu SMdoi
10.1104/pp.104.042184subject
Has Abstractpub_date
2004-07-01 00:00:00pages
1367-77issue
3eissn
0032-0889issn
1532-2548pii
pp.104.042184journal_volume
135pub_type
杂志文章相关文献
PLANT PHYSIOLOGY文献大全abstract::Nod Factor Receptor5 (NFR5) is an atypical receptor-like kinase, having no activation loop in the protein kinase domain. It forms a heterodimer with NFR1 and is required for the early plant responses to Rhizobium infection. A Rho-like small GTPase from Lotus japonicus was identified as an NFR5-interacting protein. The...
journal_title:Plant physiology
pub_type: 杂志文章
doi:10.1104/pp.112.197269
更新日期:2012-05-01 00:00:00
abstract::We identified a recessive, brassinolide-insensitive mutant caused by a deletion allele (bri1-201) of the brassinosteroid (BR) receptor BRI1. The bri1-201 mutant displayed altered expression levels of genes differentially regulated by gibberellin (GA). RNA-blot analysis revealed that BR and GA antagonistically regulate...
journal_title:Plant physiology
pub_type: 杂志文章
doi:
更新日期:2001-10-01 00:00:00
abstract::CO2 uptake rate, chlorophyll fluorescence, and 830-nm absorbance were measured in wild-type (wt) Nicotiana sylvestris (Speg. et Comes) and starchless mutant NS 458 leaves at different light intensities and CO2 concentrations. Initial slopes of the relationships between CO2 uptake and light and CO2 were similar, but th...
journal_title:Plant physiology
pub_type: 杂志文章
doi:10.1104/pp.106.2.679
更新日期:1994-10-01 00:00:00
abstract::Compatible and incompatible pollen tubes growing on detached Lilium longiflorum pistils which had been prelabeled with myoinositol-U-(14)C take up a portion of the label and utilize it for biosynthesis of tube wall substance. The label is transferred from pistil to pollen tubes apparently via the secretion products (e...
journal_title:Plant physiology
pub_type: 杂志文章
doi:10.1104/pp.45.1.92
更新日期:1970-01-01 00:00:00
abstract::The accumulation of delta-aminolevulinic acid and activities of delta-aminolevulinic acid dehydrase were examined in the marine diatom, Skeletonema costatum, grown in the presence of levulinic acid. Levulinic acid concentrations greater than 10 mm affect growth and morphology, and inhibit chlorophyll synthesis. The al...
journal_title:Plant physiology
pub_type: 杂志文章
doi:10.1104/pp.62.4.516
更新日期:1978-10-01 00:00:00
abstract::The composition of the cell wall of the cotton fiber (Gossypium hirsutum L. Acala SJ-1) has been studied from the early stages of elongation (5 days postanthesis) through the period of secondary wall formation, using cell walls derived both from fibers developing on the plant and from fibers obtained from excised, cul...
journal_title:Plant physiology
pub_type: 杂志文章
doi:10.1104/pp.59.6.1088
更新日期:1977-06-01 00:00:00
abstract::Parsley (Petroselinum crispum) cell cultures respond rapidly to treatment with fungal elicitor by the accumulation of coumarin phytoalexins in the culture fluid and by incorporation of ferulic esters into their cell walls. S-Adenosyl-l-methionine:trans-caffeoyl-CoA 3-O-methyltransferase activity, specifically involved...
journal_title:Plant physiology
pub_type: 杂志文章
doi:10.1104/pp.95.1.137
更新日期:1991-01-01 00:00:00
abstract::The uptake of iron (Fe) by VF-36 tomato plants as influenced by root temperature and manganese (Mn) nutrition was studied. Following a 1-week pretreatment period of various levels of Fe and Mn in the nutrient solution in a controlled temperature room, the uptake of (59)Fe from ferric ethylenediamine di(O-hydroxyphenyl...
journal_title:Plant physiology
pub_type: 杂志文章
doi:10.1104/pp.41.7.1095
更新日期:1966-09-01 00:00:00
abstract::Plants effectively defend themselves against biotic and abiotic stresses by synthesizing diverse secondary metabolites, including health-protective flavonoids. These display incredible chemical diversity and ubiquitous occurrence and confer impeccable biological and agricultural applications. Chalcone synthase (CHS), ...
journal_title:Plant physiology
pub_type: 杂志文章
doi:10.1104/pp.16.00003
更新日期:2016-08-01 00:00:00
abstract::Yen1/GEN1 are canonical Holliday junction resolvases that belong to the RAD2/XPG family. In eukaryotes, such as budding yeast, mice, worms, and humans, Yen1/GEN1 work together with Mus81-Mms4/MUS81-EME1 and Slx1-Slx4/SLX1-SLX4 in DNA repair by homologous recombination to maintain genome stability. In plants, the biolo...
journal_title:Plant physiology
pub_type: 杂志文章
doi:10.1104/pp.16.01726
更新日期:2017-02-01 00:00:00
abstract::Phosphorus (P) remobilization in plants is required for continuous growth and development. The Arabidopsis (Arabidopsis thaliana) inorganic phosphate (Pi) transporter Pht1;5 has been implicated in mobilizing stored Pi out of older leaves. In this study, we used a reverse genetics approach to study the role of Pht1;5 i...
journal_title:Plant physiology
pub_type: 杂志文章
doi:10.1104/pp.111.174805
更新日期:2011-07-01 00:00:00
abstract::Coronatine is a chlorosis-inducing toxin produced by the plant pathogen Pseudomonas syringae pv atropurpurea. This bacterium is the causal agent of chocolate spot disease, in which brown lesions with chlorotic margins develop on the leaves of Lolium multiflorum Lam. Among the many physiological changes to plants cause...
journal_title:Plant physiology
pub_type: 杂志文章
doi:10.1104/pp.100.1.219
更新日期:1992-09-01 00:00:00
abstract::The separate package and spillover models of photosynthetic enhancement are generalized and extended to light saturation assuming hyperbolic or exponential rate versus intensity curves. The available data are more consistent with the exponential model at high light intensities. Two significant conclusions follow: (a) ...
journal_title:Plant physiology
pub_type: 杂志文章
doi:10.1104/pp.47.2.222
更新日期:1971-02-01 00:00:00
abstract::The effect of salicylic acid (SA) on respiration and mitochondrial function was examined in tobacco (Nicotiana tabacum) suspension cell cultures in the range of 0.01 to 5 mm. Cells rapidly accumulated SA up to 10-fold of the externally applied concentrations. At the lower concentrations, SA accumulation was transitory...
journal_title:Plant physiology
pub_type: 杂志文章
doi:10.1104/pp.103.031039
更新日期:2004-01-01 00:00:00
abstract::Photosynthetic rate, ribulose 1,5-bisphosphate carboxylase activity, specific leaf weight, and leaf concentrations of carbohydrates, proteins, chlorophyll, and inorganic phosphate were determined periodically from midbloom until maturity in leaves of soybean plants (Glycine max L., var. Hodgson) from which reproductiv...
journal_title:Plant physiology
pub_type: 杂志文章
doi:10.1104/pp.61.3.394
更新日期:1978-03-01 00:00:00
abstract::ADP-glucose pyrophosphorylase catalyzes the synthesis of ADP-glucose (ADP-Glc) from Glc-1-phosphate (G-1-P) and ATP. Kinetic studies were performed to define the nature of the reaction, both in the presence and absence of allosteric effector molecules. When 3-phosphoglycerate (3-PGA), the putative physiological activa...
journal_title:Plant physiology
pub_type: 杂志文章
doi:10.1104/pp.109.149450
更新日期:2010-02-01 00:00:00
abstract::Immune responses of Arabidopsis (Arabidopsis thaliana) are at least partially mediated by coordinated transcriptional up-regulation of plant defense genes, such as the Late/sustained Up-regulation in Response to Hyaloperonospora parasitica (LURP) cluster. We found a defined region in the promoter of the LURP member Ca...
journal_title:Plant physiology
pub_type: 杂志文章
doi:10.1104/pp.108.133678
更新日期:2009-05-01 00:00:00
abstract::Field-grown tuber-bearing potatoes were screened for frost tolerance in a late stage of development. Three different clones of Solanum tuberosum L. and two interspecific crosses between clones of S. tuberosum and the wild potato species S. demissum Lindl. were studied. Two different methods were used. (a) Temperature-...
journal_title:Plant physiology
pub_type: 杂志文章
doi:10.1104/pp.70.5.1299
更新日期:1982-11-01 00:00:00
abstract::Rubbing-induced lignification in Bryonia dioica internodes is significantly impaired by N(o-hydroxyphenyl) and N(o-aminophenyl) sulfinamoyl tertiobutyl acetate, specific inhibitors of cinnamyl alcohol dehydrogenase, an enzyme which is strictly associated with lignin monomer synthesis. Along with the reduction of ligni...
journal_title:Plant physiology
pub_type: 杂志文章
doi:10.1104/pp.84.1.10
更新日期:1987-05-01 00:00:00
abstract::Experiments were designed to obtain evidence about the possible role of xanthophylls as abscisic acid (ABA) precursors in water-stressed leaves of Phaseolus vularis L. Leaves were exposed to (14)CO(2) and the specific activities of several major leaf xanthophylls and stress-induced ABA were determined after a chase in...
journal_title:Plant physiology
pub_type: 杂志文章
doi:10.1104/pp.85.4.910
更新日期:1987-12-01 00:00:00
abstract::Glyoxysomes isolated from castor bean (Ricinus communis L. var. zanzibariensis) endosperm have been stained by the cytochemical diaminobenzidine reaction. The reaction product obtained by preincubation with 3,3'-diaminobenzidine and incubation with the reagent and H(2)O(2) is distributed uniformly throughout the matri...
journal_title:Plant physiology
pub_type: 杂志文章
doi:10.1104/pp.53.2.276
更新日期:1974-02-01 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::This study examines the capacity of intact spinach (Spinacia oleracea L.) chloroplasts to fix (14)CO(2) when supplied with Benson-Calvin cycle intermediates in the presence of 3-(3,4-dichlorophenyl)-1,1-dimethylurea (DCMU). Under these conditions, substantial (14)CO(2) fixation occurred in the light but not in the dar...
journal_title:Plant physiology
pub_type: 杂志文章
doi:10.1104/pp.72.2.321
更新日期:1983-06-01 00:00:00
abstract::Rice (Oryza sativa) accumulates prolamins and glutelins as storage proteins. The latter storage protein is synthesized on the endoplasmic reticulum (ER) as a 57-kD proglutelin precursor, which is then processed into acidic and basic subunits in the protein storage vacuole. Three esp2 mutants, CM1787, EM44, and EM747, ...
journal_title:Plant physiology
pub_type: 杂志文章
doi:10.1104/pp.010624
更新日期:2002-04-01 00:00:00
abstract::This paper reports the purification and structural determination of the mannolipid shown previously (Ericson and Delmer 1977 Plant Physiol 59: 341-347) to serve as an intermediate in glycoprotein synthesis in cotyledons of Phaseolus vulgaris. The mannolipid was purified by chromatography in organic solvents on diethyl...
journal_title:Plant physiology
pub_type: 杂志文章
doi:10.1104/pp.61.1.25
更新日期:1978-01-01 00:00:00
abstract::Three unique classes of carbohydrates were isolated from the hyphal cell walls of Phytophthora megasperma f.sp. glycinea (Pmg) and compared with other substances for their activity as elicitors of the phytoalexin glyceollin in soybean tissues. Glucomannans extracted from cell walls with soybean beta-1,3-endoglucanase ...
journal_title:Plant physiology
pub_type: 杂志文章
doi:10.1104/pp.71.3.466
更新日期:1983-03-01 00:00:00
abstract::The duckweed Spirodela oligorrhiza was grown in sterile nutrient solutions that contained 1 mm phosphate-(32)P at various specific activities. In solutions with activities higher than 2 muc per mumole per ml, plant growth was inhibited after a time, and the physical appearance of the plants was affected. The critical ...
journal_title:Plant physiology
pub_type: 杂志文章
doi:10.1104/pp.43.8.1297
更新日期:1968-08-01 00:00:00
abstract::We have used laser-capture microdissection to isolate RNA from discrete tissues of globular, heart, and torpedo stage embryos of Arabidopsis (Arabidopsis thaliana). This was amplified and analyzed by DNA microarray using the Affymetrix ATH1 GeneChip, representing approximately 22,800 Arabidopsis genes. Cluster analysi...
journal_title:Plant physiology
pub_type: 杂志文章
doi:10.1104/pp.106.087668
更新日期:2007-02-01 00:00:00
abstract::Bean (Phaseolus vulgaris L.) seeds contain a putative plant defense protein that inhibits insect and mammalian but not plant alpha-amylases. We recently (J Moreno, MJ Chrispeels [1989] Proc Natl Acad Sci USA 86:7885-7889) presented strong circumstantial evidence that this alpha-amylase inhibitor (alphaAI) is encoded b...
journal_title:Plant physiology
pub_type: 杂志文章
doi:10.1104/pp.93.2.805
更新日期:1990-06-01 00:00:00
abstract::Combined gas chromatography-mass spectrometry has been used to identify indole-3-methanol in a purified buffer extract from etiolated seedlings of Pinus sylvestris L. Quantitative estimates obtained by high performance liquid chromatography with fluorescence detection, corrected for losses occurring during purificatio...
journal_title:Plant physiology
pub_type: 杂志文章
doi:10.1104/pp.77.4.952
更新日期:1985-04-01 00:00:00