Abstract:
:Rhizobia secrete nodulation (Nod) factors, which set in motion the formation of nitrogen-fixing root nodules on legume host plants. Nod factors induce several cellular responses in root hair cells within minutes, but also are essential for the formation of infection threads by which rhizobia enter the root. Based on studies using bacterial mutants, a two-receptor model was proposed, a signaling receptor that induces early responses with low requirements toward Nod factor structure and an entry receptor that controls infection with more stringent demands. Recently, putative Nod factor receptors were shown to be LysM domain receptor kinases. However, mutants in these receptors, in both Lotus japonicus (nfr1 and nfr5) and Medicago truncatula (Medicago; nfp), do not support the two-receptor model because they lack all Nod factor-induced responses. LYK3, the putative Medicago ortholog of NFR1, has only been studied by RNA interference, showing a role in infection thread formation. Medicago hair curling (hcl) mutants are unable to form curled root hairs, a step preceding infection thread formation. We identified the weak hcl-4 allele that is blocked during infection thread growth. We show that HCL encodes LYK3 and, thus, that this receptor, besides infection, also controls root hair curling. By using rhizobial mutants, we also show that HCL controls infection thread formation in a Nod factor structure-dependent manner. Therefore, LYK3 functions as the proposed entry receptor, specifically controlling infection. Finally, we show that LYK3, which regulates a subset of Nod factor-induced genes, is not required for the induction of NODULE INCEPTION.
journal_name
Plant Physioljournal_title
Plant physiologyauthors
Smit P,Limpens E,Geurts R,Fedorova E,Dolgikh E,Gough C,Bisseling Tdoi
10.1104/pp.107.100495subject
Has Abstractpub_date
2007-09-01 00:00:00pages
183-91issue
1eissn
0032-0889issn
1532-2548pii
pp.107.100495journal_volume
145pub_type
杂志文章相关文献
PLANT PHYSIOLOGY文献大全abstract::Gibberellic acid (GA(3)) promotes and continuous gold light inhibits germination of seeds of a dwarf strain (WB-2) of watermelon [Citrullus lanatus (Thunb.) Matsu. and Nakai]. Osmotic inhibition of germination with mannitol in light-grown seeds of WB-2 was only slightly reversed by GA(3) at the concentrations used, wh...
journal_title:Plant physiology
pub_type: 杂志文章
doi:10.1104/pp.62.1.6
更新日期:1978-07-01 00:00:00
abstract::We studied the relationship between ethylene and gravity-induced upward bending of bermudagrass (Cynodon dactylon L. Pers.) stolons. Ethylene production begins within 3 hours of the onset of gravistimulation, and increases thereafter until the 15th hour, after which it declines. There is a close positive relationship ...
journal_title:Plant physiology
pub_type: 杂志文章
doi:10.1104/pp.91.4.1251
更新日期:1989-12-01 00:00:00
abstract::Ozone-treated cells of the photosynthetic green alga Chlorella sorokiniana var. pacificensis exhibit an exponential decline in viability, as measured by their ability to form colonies on agar plates. Postexposure conditions appear to have little, if any, effect on this rate of decline. Except in young (early exponenti...
journal_title:Plant physiology
pub_type: 杂志文章
doi:10.1104/pp.55.1.15
更新日期:1975-01-01 00:00:00
abstract::We have investigated the involvement of phytochrome B in the early-flowering response of Arabidopsis thaliana L. seedlings to low red:far-red (R/FR) ratio light conditions. The phytochrome B-deficient hy3 (phyB) mutant is early flowering, and in this regard it resembles the shade-avoidance phenotype of its isogenic wi...
journal_title:Plant physiology
pub_type: 杂志文章
doi:10.1104/pp.104.4.1311
更新日期:1994-04-01 00:00:00
abstract::Synechocystis (PCC 6714) is photoinhibited at low photon flux density when illuminated in medium devoid of Na(+). Photosynthetic activity and variable fluorescence yield were measured in intact cells during the course of inhibition and during recovery from inhibition in order to characterize sequential inhibitory even...
journal_title:Plant physiology
pub_type: 杂志文章
doi:10.1104/pp.91.1.91
更新日期:1989-09-01 00:00:00
abstract::When pea (Pisum sativum) seeds were wetted, a sharp front separated the wet and dry portions, the seeds swelled, and the water content in the wetted portion continued to increase for a long time. A model was proposed and tested that takes into account these three characteristics and in particular does not postulate a ...
journal_title:Plant physiology
pub_type: 杂志文章
doi:10.1104/pp.57.2.153
更新日期:1976-02-01 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::Angiosperms requires light for multiple aspects of chloroplast development, including chlorophyll synthesis and induction of expression of the mRNAs encoding the major polypeptides of the light-harvesting complex of photosystem II (Lhcb genes). In contrast, many conifers, including pines, firs, and spruces, can accumu...
journal_title:Plant physiology
pub_type: 杂志文章
doi:10.1104/pp.111.2.627
更新日期:1996-06-01 00:00:00
abstract::As a result of the phenylpropanoid pathway, many Brassicaceae produce considerable amounts of soluble hydroxycinnamate conjugates, mainly sinapate esters. From oilseed rape (Brassica napus), we cloned two orthologs of the Arabidopsis (Arabidopsis thaliana) gene reduced epidermal fluorescence1 (REF1) encoding a conifer...
journal_title:Plant physiology
pub_type: 杂志文章
doi:10.1104/pp.113.215491
更新日期:2013-04-01 00:00:00
abstract::A Sclerotinia enzyme preparation with predominant exo-beta-(1-->3)-glucanase activity has the capacity to mediate the formation of tetrasaccharide from 3-O-beta-cellobiosyl-d-glucose or cellotriose, and a pentasaccharide from 3-O-beta-cellotriosyl-d-glucose or cellotetraose. Transglucosylation is not observed when the...
journal_title:Plant physiology
pub_type: 杂志文章
doi:10.1104/pp.64.2.193
更新日期:1979-08-01 00:00:00
abstract::Root iron mobilization genes are induced by iron deficiency downstream of an unknown signaling mechanism. The FER gene, encoding a basic helix-loop-helix domain protein and putative transcription factor, is required for induction of iron mobilization genes in roots of tomato (Lycopersicon esculentum). To study upstrea...
journal_title:Plant physiology
pub_type: 杂志文章
doi:10.1104/pp.104.054270
更新日期:2005-03-01 00:00:00
abstract::The appearance and disappearance of NADH:nitrate reductase (NR) in the leaves of corn (Zea mays L. W64A x W182E) were studied using activity assays, an enzyme-linked immunosorbent assay (ELISA) and western blotting. N-starved, etiolated corn plants were treated with nutrients containing either 35 millimolar NH(4)-nitr...
journal_title:Plant physiology
pub_type: 杂志文章
doi:10.1104/pp.80.2.442
更新日期:1986-02-01 00:00:00
abstract::Precise measurements of the minimal fluorescence yield (F(o)) and maximal fluorescence yield (F(m)) of a dark-adapted sample are prerequisites for the quantification of other fluorescence parameters. The pulse amplitude-modulated chlorophyll fluorometer (PAM 101 Chlorophyll Fluorometer, Heinz Walz, Effeltrich, Germany...
journal_title:Plant physiology
pub_type: 杂志文章
doi:10.1104/pp.100.1.367
更新日期:1992-09-01 00:00:00
abstract::Light-dependent formation of ribulose-1,5 diphosphate is completely inhibited by low concentrations of 3-(3,4-dichlorophenyl)-1,1-dimethylurea which do not severely affect cyclic photophosphorylation. Also in Scenedesmus mutant number 11, capable of cyclic photophosphorylation, cellular ribulose-1,5 diphosphate-levels...
journal_title:Plant physiology
pub_type: 杂志文章
doi:10.1104/pp.49.6.904
更新日期:1972-06-01 00:00:00
abstract::Previous work indicated more polysomes bound to pea (Pisum sativum cv Progress No. 9) thylakoids in light than in the dark, in vivo (LE Fish, AT Jagendorf 1982 Plant Physiol 69: 814-825). With isolated intact chloroplasts incubated in darkness, addition of MgATP had no effect but 24 to 74% more RNA was thylakoid-bound...
journal_title:Plant physiology
pub_type: 杂志文章
doi:10.1104/pp.84.1.31
更新日期:1987-05-01 00:00:00
abstract::Experiments with lettuce seeds during the first hours of imbibition showed that oxygen is necessary to sustain high adenine nucleotide ratios and consequently, energy charge values are higher than 0.8 as is usually the case in normally metabolizing tissues.The energy charge value (0.2) of dry seeds soaked in aerated w...
journal_title:Plant physiology
pub_type: 杂志文章
doi:10.1104/pp.68.3.631
更新日期:1981-09-01 00:00:00
abstract::The concentration-dependent stimulatory and inhibitory effect of N-glycans on tomato (Lycopersicon esculentum Mill.) fruit ripening was recently reported (B. Priem and K.C. Gross [1992] Plant Physiol 98: 399-401). We report here the structure of 10 free N-glycans in mature green tomatoes. N-Glycans were purified from ...
journal_title:Plant physiology
pub_type: 杂志文章
doi:10.1104/pp.102.2.445
更新日期:1993-06-01 00:00:00
abstract::The auxin indole-3-acetic acid (IAA) has been shown to promote the biosynthesis of the active gibberellin (GA(1)) in shoots of pea (Pisum sativum). We used northern analysis to investigate the timing of IAA-induced changes in transcript levels of PsGA3ox1 (Mendel's LE), PsGA2ox1, PsGA2ox2, and PsGA20ox1, key genes for...
journal_title:Plant physiology
pub_type: 杂志文章
doi:10.1104/pp.010587
更新日期:2002-12-01 00:00:00
abstract::To define the functions of genes previously identified by expression profiling as being rapidly light induced under phytochrome (phy) control, we are investigating the seedling de-etiolation phenotypes of mutants carrying T-DNA insertional disruptions at these loci. Mutants at one such locus displayed reduced responsi...
journal_title:Plant physiology
pub_type: 杂志文章
doi:10.1104/pp.103.030007
更新日期:2003-12-01 00:00:00
abstract::In an earlier paper we showed that in fully developed barley (Hordeum vulgare L.) root epidermal cells a decrease in cytosolic K+ was associated with an acidification of the cytosol (D.J. Walker, R. A. Leigh, A.J. Miller [1996] Proc Natl Acad Sci USA 93: 10510-10514). To show that these changes in cytosolic ion concen...
journal_title:Plant physiology
pub_type: 杂志文章
doi:10.1104/pp.118.3.957
更新日期:1998-11-01 00:00:00
abstract::An NAD-linked dehydrogenase from Chlorella pyrenoidosa Chick catalyzing the conversion of l-proline to Delta(1)-pyrroline-5-carboxylic acid was partially purified. Delta(1)-Pyrroline-5-carboxylic acid was identified as the product by co-chromatography of it and its o-aminobenzaldehyde derivative with authentic compoun...
journal_title:Plant physiology
pub_type: 杂志文章
doi:10.1104/pp.53.3.440
更新日期:1974-03-01 00:00:00
abstract::A radiation-induced mutant of Scotch spearmint (Mentha x gracilis) was shown to produce an essential oil containing principally C3-oxygenated p-menthane monoterpenes that are typical of peppermint, instead of the C6-oxygenated monoterpene family characteristic of spearmint. In vitro measurement of all of the enzymes r...
journal_title:Plant physiology
pub_type: 杂志文章
doi:10.1104/pp.96.3.744
更新日期:1991-07-01 00:00:00
abstract::Three forms of pyrophosphate fructose-6-phosphate 1-phosphotransferase (PFP) were purified from both green and red tomato (Lycopersicon esculentum) fruit: (a) a classical form (designated Q(2)) containing alpha- (66 kilodalton) and beta- (60 kilodalton) subunits; (b) a form (Q(1)) containing a beta-doublet subunit; an...
journal_title:Plant physiology
pub_type: 杂志文章
doi:10.1104/pp.94.2.499
更新日期:1990-10-01 00:00:00
abstract::The white petals of chrysanthemum (Chrysanthemum morifolium Ramat.) are believed to contain a factor that inhibits the accumulation of carotenoids. To find this factor, we performed polymerase chain reaction-Select subtraction screening and obtained a clone expressed differentially in white and yellow petals. The dedu...
journal_title:Plant physiology
pub_type: 杂志文章
doi:10.1104/pp.106.087130
更新日期:2006-11-01 00:00:00
abstract::The transcription factors LEAFY (LFY) and APETALA1 (AP1), together with the AP1 paralog CAULIFLOWER (CAL), control the onset of flower development in a partially redundant manner. This redundancy is thought to be mediated, at least in part, through the regulation of a shared set of target genes. However, whether these...
journal_title:Plant physiology
pub_type: 杂志文章
doi:10.1104/pp.17.00098
更新日期:2017-06-01 00:00:00
abstract::Maize (Zea mays) leaves provide a useful system to study how proximal/distal patterning is established because of the distinct tissues found in the distal blade and the proximal sheath. Several mutants disrupt this pattern, including the dominant knotted1-like homeobox (knox) mutants. knox genes encode homeodomain pro...
journal_title:Plant physiology
pub_type: 杂志文章
doi:10.1104/pp.109.145920
更新日期:2009-12-01 00:00:00
abstract::"Active Fe" in plants has generally been interpreted to be ferrous iron. This study evaluated some of the commonly followed active Fe determination procedures based on Fe(II) measurements. In each of 12 species examined, leaf extracts exhibited strong reducing activity and quickly reduced any added Fe(III) with or wit...
journal_title:Plant physiology
pub_type: 杂志文章
doi:10.1104/pp.93.3.1017
更新日期:1990-07-01 00:00:00
abstract::A mutant of Arabidopsis contained increased levels of 18:3 fatty acids and correspondingly decreased levels of 18:2. The fatty acid phenotype was strongly expressed in root and seed tissues and this observation, together with other data, suggested that the mutation leads to increased activity of the endoplasmic reticu...
journal_title:Plant physiology
pub_type: 杂志文章
doi:10.1104/pp.114.4.1533
更新日期:1997-08-01 00:00:00
abstract::Isoflavonoids are distributed predominantly in leguminous plants and play critical roles in plant physiology. A cytochrome P450 (P450), 2-hydroxyisoflavanone synthase, is the key enzyme in their biosynthesis. In cultured licorice (Glycyrrhiza echinata L., Fabaceae) cells, the production of both an isoflavonoid-derived...
journal_title:Plant physiology
pub_type: 杂志文章
doi:10.1104/pp.121.3.821
更新日期:1999-11-01 00:00:00
abstract::We have analyzed the possibility that chemical signaling does not entirely account for the effect of water deficit on the maize (Zea mays L.) leaf elongation rate (LER) under high evaporative demand. We followed time courses of LER (0.2-h interval) and spatial distribution of elongation rate in leaves of either water-...
journal_title:Plant physiology
pub_type: 杂志文章
doi:10.1104/pp.114.3.893
更新日期:1997-07-01 00:00:00