Abstract:
:Sucrose synthase, which cleaves sucrose in the presence of uridine diphosphate (UDP) into UDP-glucose and fructose, is thought to be a key determinant of sink strength of heterotrophic plant organs. To determine the roles of the enzyme in carrot, we characterized carrot sucrose synthase at the molecular level. Two genes (Susy*Dc1 and Susy*Dc2) were isolated. The deduced amino acid sequences are 87% identical. However, the sequences upstream of the translation initiation codons are markedly different, as are the expression patterns of the two genes. Susy*Dc2 was exclusively expressed in flowers. Transcripts for Susy*Dc1 were found in stems, in roots at different developmental stages, and in flower buds, flowers and maturing seeds, with the highest levels in strong utilization sinks for sucrose such as growing stems and tap root tips. Expression of Susy*Dc1 was regulated by anaerobiosis but not by sugars or acetate. The carrot sucrose synthase protein is partly membrane-associated and this insoluble form may be directly involved in cellulose biosynthesis. Tap roots of the carrot cultivar used accumulated starch in the vicinity of the vascular bundles, which correlated with high sucrose synthase transcript levels. This finding suggests that soluble sucrose synthase in tap roots channels sucrose towards starch biosynthesis. Starch accumulation appears to be transient and may be involved in sucrose partitioning to developing tap roots.
journal_name
Plant Mol Bioljournal_title
Plant molecular biologyauthors
Sturm A,Lienhard S,Schatt S,Hardegger Mdoi
10.1023/a:1006199003756subject
Has Abstractpub_date
1999-01-01 00:00:00pages
349-60issue
2eissn
0167-4412issn
1573-5028journal_volume
39pub_type
杂志文章abstract::Plastidic acetyl-CoA carboxylase (ACCase) regulates the rate of fatty acid synthesis. This enzyme is composed of biotin carboxyl carrier protein (BCCP), biotin carboxylase (BC), and carboxyltransferase (CT), which consists of α and β subunits. Among these components, CTβ is encoded by the plastidic genome. In Arabidop...
journal_title:Plant molecular biology
pub_type: 杂志文章
doi:10.1007/s11103-013-0075-7
更新日期:2013-07-01 00:00:00
abstract::Sugarcane (Saccharum spp. hybrids) is a major feedstock for commercial bioethanol production. The recent integration of conversion technologies that utilize lignocellulosic sugarcane residues as well as sucrose from stem internodes has elevated bioethanol yields. RNAi suppression of lignin biosynthetic enzymes is a su...
journal_title:Plant molecular biology
pub_type: 杂志文章
doi:10.1007/s11103-016-0527-y
更新日期:2016-11-01 00:00:00
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journal_title:Plant molecular biology
pub_type: 杂志文章
doi:10.1007/s11103-014-0210-0
更新日期:2014-09-01 00:00:00
abstract:KEY MESSAGE:Based on the nature of the proteins that are altered in abundance, we conclude that guard cells switch their energy source from fatty acid metabolism to chloroplast activity, at the onset of dawn. During stomatal opening at dawn, evidence was recently presented for a breakdown and liquidation of stored tria...
journal_title:Plant molecular biology
pub_type: 杂志文章
doi:10.1007/s11103-018-0794-x
更新日期:2018-12-01 00:00:00
abstract::The coding sequence for FLP recombinase, originally from the 2 mu plasmid of Saccharomyces cerevisiae, was introduced into Arabidopsis behind the cauliflower mosaic virus 35S promoter. FLP activity was monitored by the glucuronidase activity resulting from inversion of an antisense-oriented GUS reporter gene flanked b...
journal_title:Plant molecular biology
pub_type: 杂志文章
doi:10.1007/BF00032673
更新日期:1995-09-01 00:00:00
abstract::Three genes that encode MAP65-1 family proteins have been identified in the Nicotiana tabacum genome. In this study, NtMAP65-1c fusion protein was shown to bind and bundle microtubules (MTs). Further in vitro investigations demonstrated that NtMAP65-1c not only alters MT assembly and nucleation, but also exhibits high...
journal_title:Plant molecular biology
pub_type: 杂志文章
doi:10.1007/s11103-010-9694-4
更新日期:2010-12-01 00:00:00
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journal_title:Plant molecular biology
pub_type: 杂志文章,评审
doi:10.1007/BF00040537
更新日期:1992-09-01 00:00:00
abstract::Two dimensional gel electrophoresis was used to examine differences in steady state total poly(A) RNA from untransformed potato (Solanum tuberosum cv. Maris Bard) and potato transformed with shoot-inducing TL-DNA from A. tumefaciens. RNA was compared from phenotypically very distinct in vitro cultured shoots, more sim...
journal_title:Plant molecular biology
pub_type: 杂志文章
doi:10.1007/BF00015227
更新日期:1986-07-01 00:00:00
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journal_title:Plant molecular biology
pub_type: 杂志文章
doi:10.1007/BF00021797
更新日期:1996-05-01 00:00:00
abstract::The sequence of the S-adenosyl-L-methionine:trans-caffeoyl-CoA O-methyltransferase (CCoAOMT, EC2.1.1.104) gene, including the 5'-flanking region of 5 kb, was determined from parsley (Petroselinum crispum) plants. The enzyme appears to be encoded by one or two genes, and the ORF is arranged in five exons spaced by intr...
journal_title:Plant molecular biology
pub_type: 杂志文章
doi:10.1023/a:1005780529457
更新日期:1997-01-01 00:00:00
abstract:KEY MESSAGE:The OsPLS2 locus was isolated and cloned by map-based cloning that encodes a Upf1-like helicase. Disruption of OsPLS2 accelerated light-dependent leaf senescence in the rice mutant of ospls2. Leaf senescence is a very complex physiological process controlled by both genetic and environmental factors, howeve...
journal_title:Plant molecular biology
pub_type: 杂志文章
doi:10.1007/s11103-019-00848-4
更新日期:2019-05-01 00:00:00
abstract::The beneficial root-colonizing fungus Piriformospora indica stimulates root development of Chinese cabbage (Brassica campestris subsp. Chinensis) and this is accompanied by the up-regulation of a τ-class glutathione (GSH)-S-transferase gene (BcGSTU) (Lee et al. 2011) in the roots. BcGSTU expression is further promoted...
journal_title:Plant molecular biology
pub_type: 杂志文章
doi:10.1007/s11103-016-0531-2
更新日期:2016-12-01 00:00:00
abstract::Glutelin is the most abundant storage protein in rice, which is expressed specifically in the endosperm of maturing seed. Glutelin is encoded by about 10 genes per haploid genome, which are clearly divided into two subfamilies (GluA and GluB). Most of them are coordinately expressed during seed maturation in spite of ...
journal_title:Plant molecular biology
pub_type: 杂志文章
doi:10.1007/BF00019553
更新日期:1996-03-01 00:00:00
abstract::Antisera against the N-terminal and C-terminal parts of the potential ORF IV product were used to analyse extracts from CaMV-infected turnip leaves by immunoblotting. Polypeptides of 87, 83, 82, 60 and 57 kDa were detected. The origin of these proteins is discussed. ...
journal_title:Plant molecular biology
pub_type: 杂志文章
doi:10.1007/BF00027384
更新日期:1988-05-01 00:00:00
abstract::Rice provides a staple source of energy, protein and other nutrients to half of the world population. Over 90 of the rice seeds consists of starch and protein by dry weight. The quantity and property of starch and protein thus play a dominant role in the yield and quality of rice. The amylase content of starch is a de...
journal_title:Plant molecular biology
pub_type: 杂志文章
doi:10.1007/s11103-004-7507-3
更新日期:2005-09-01 00:00:00
abstract::The small GTPases of the Rho family play a key role in actin cytoskeletal organization. In plants, a novel Rho subfamily, called ROP (Rho of plants), has been found. In Arabidopsis, 12 ROP GTPases have been identified which differ mainly at their C-termini. To test the localization of two members of this subfamily (At...
journal_title:Plant molecular biology
pub_type: 杂志文章
doi:10.1023/a:1006341210147
更新日期:2000-02-01 00:00:00
abstract::The conserved protein CBF5, initially regarded as a centromere binding protein in yeast and higher plants, was later found within nucleoli and in Cajal bodies of yeast and metazoa. There, it is assumed to be involved in posttranscriptional pseudouridinylation of various RNA species that might be important for RNA proc...
journal_title:Plant molecular biology
pub_type: 杂志文章
doi:10.1007/s11103-007-9226-z
更新日期:2007-11-01 00:00:00
abstract::A tapetum-specific gene, RTS, has been isolated by differential screening of a cDNA library from rice panicles. RTS is a unique gene in the rice genome. RNA blot analysis and in situ hybridization indicates that this gene is predominantly expressed in the anther's tapetum during meiosis and disappears before anthesis....
journal_title:Plant molecular biology
pub_type: 杂志文章
doi:10.1007/s11103-006-9031-0
更新日期:2006-10-01 00:00:00
abstract::Transposable elements were first discovered in plants because they can have tremendous effects on genome structure and gene function. Although only a few or no elements may be active within a genome at any time in any individual, the genomic alterations they cause can have major outcomes for a species. All major eleme...
journal_title:Plant molecular biology
pub_type: 杂志文章,评审
doi:
更新日期:2000-01-01 00:00:00
abstract::A leaf cDNA library from hybrid aspen, Populus tremula x tremuloides, was constructed. From this two different cDNA clones, denoted CA1a and CA1b, encoding a chloroplastic carbonic anhydrase (CA) were isolated and DNA sequenced. Analysis of the deduced amino acid sequences showed that the isolated CAs belong to the be...
journal_title:Plant molecular biology
pub_type: 杂志文章
doi:10.1023/a:1005849202731
更新日期:1997-07-01 00:00:00
abstract::The Arabidopsis genome contains 10 genes belonging to the HD-Zip II family including ATHB2 and HAT2. Previous work has shown that ATHB2 is rapidly and strongly induced by light quality changes that provoke the shade avoidance response whereas HAT2 expression responds to auxin. Here, we present a genome-wide analysis o...
journal_title:Plant molecular biology
pub_type: 杂志文章
doi:10.1007/s11103-008-9383-8
更新日期:2008-11-01 00:00:00
abstract::Cotton fiber elongation, largely achieved by cell wall loosening, is an important stage during cotton fiber development. In this present research, a fiber preferential cDNA encoding a pectate lyase (PEL) which could exclusively degrade the de-esterified pectin was isolated from a cotton (Gossypium hirsutum) fiber cDNA...
journal_title:Plant molecular biology
pub_type: 杂志文章
doi:10.1007/s11103-009-9578-7
更新日期:2010-03-01 00:00:00
abstract::Polyphenol oxidases (PPOs) catalyze the oxidation of ortho-diphenols to the corresponding quinones (EC 1.10.3.1). In plants PPOs appear in gene families, and the corresponding isoenzymes are located to the thylakoid lumen of chloroplasts. Although plant PPOs are often discussed with regard to their role in defense rea...
journal_title:Plant molecular biology
pub_type: 杂志文章
doi:10.1007/s11103-012-9943-9
更新日期:2012-09-01 00:00:00
abstract::Two types of structurally distinct O-methyltransferases mediate the methylation of hydroxylated monomeric lignin precursors in angiosperms. Caffeate 3-O-methyltransferase (COMT; EC 2.1.1.68) methylates the free acids and caffeoyl CoA 3-O-methyltransferase (CCoAOMT; EC 2.1.1.104) methylates coenzyme A esters. Recently,...
journal_title:Plant molecular biology
pub_type: 杂志文章
doi:10.1023/a:1006244325250
更新日期:1999-07-01 00:00:00
abstract::A cDNA clone (lp3) from loblolly pine induced by water deficit stress (WDS) has been isolated. It is preferentially induced in roots with a constitutive basal level of expression also observed in stems and needles. Northern blot analysis with well irrigated ABA-treated seedlings indicated that the overall accumulation...
journal_title:Plant molecular biology
pub_type: 杂志文章
doi:10.1023/a:1005897921567
更新日期:1997-12-01 00:00:00
abstract::To isolate differentially expressed genes during the juvenile-to-adult phase transition of an early-flowering trifoliate orange mutant (precocious trifoliate orange, Poncirus trifoliata), suppression subtractive hybridization was performed. In total, 463 cDNA clones chosen by differential screening of 1,920 clones wer...
journal_title:Plant molecular biology
pub_type: 杂志文章
doi:10.1007/s11103-011-9780-2
更新日期:2011-05-01 00:00:00
abstract::Infection of tobacco by tobacco mosaic virus (TMV) induces coordinate expression of genes encoding acidic and basic beta-1,3-glucanase isoforms. These genes are differentially expressed in response to other treatments. Salicylate treatment induces acidic glucanase mRNA to a higher level than basic glucanase mRNA. Ethy...
journal_title:Plant molecular biology
pub_type: 杂志文章
doi:10.1007/BF00028803
更新日期:1993-02-01 00:00:00
abstract::The PR-like proteins, class I beta-1,3-glucanase (GLU I) and chitinase (CHN I), are induced as part of a stereotypic response that can provide protection against viral, bacterial, and fungal pathogens. We have identified two Nicotiana plumbaginifolia ankyrin-repeat proteins, designated Glucanohydrolase Binding Protein...
journal_title:Plant molecular biology
pub_type: 杂志文章
doi:10.1007/s11103-004-4679-9
更新日期:2004-11-01 00:00:00
abstract::Plants respond to phosphate (Pi) deficiency through adaptive mechanisms involving several morphological, biochemical and molecular changes. In this study, we have characterized the structure and expression of a tomato (Lycopersicon esculentum L.) phosphate starvation-induced gene (TPSI1). A 3.5 kb genomic fragment con...
journal_title:Plant molecular biology
pub_type: 杂志文章
doi:10.1023/a:1005729309569
更新日期:1997-03-01 00:00:00
abstract::A CDNA encoding a 47 kDa nucleoside triphosphatase (NTPase) that is associated with the chromatin of pea nuclei has been cloned and sequenced. The translated sequence of the cDNA includes several domains predicted by known biochemical properties of the enzyme, including five motifs characteristic of the ATP-binding do...
journal_title:Plant molecular biology
pub_type: 杂志文章
doi:10.1007/BF00017808
更新日期:1996-01-01 00:00:00