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You searched for: Journal Journal of experimental botany Remove constraint Journal: Journal of experimental botany Publication Year 2013 Remove constraint Publication Year: 2013 Source 2013 v.64 no.2 Remove constraint Source: 2013 v.64 no.2
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1. A combined histology and transcriptome analysis unravels novel questions on Medicago truncatula seed coat

Author:
Verdier, Jerome; Dessaint, Fabrice; Schneider, Charles; Abirached-Darmency, Mona
Source:
Journal of experimental botany 2013 v.64 no.2 pp. 459-470
ISSN:
0022-0957
Subject:
Medicago truncatula; abscisic acid; biosynthesis; endopolyploidy; filling period; genomics; histology; hormonal regulation; permeability; regulator genes; seed quality; testa; transcriptome; transcriptomics
Abstract:
... The seed coat is involved in the determination of seed quality traits such as seed size, seed composition, seed permeability, and hormonal regulation. Understanding seed coat structure is therefore a prerequisite to deciphering the genetic mechanisms that govern seed coat functions. By combining histological and transcriptomic data analyses, cellular and molecular events occurring during Medicago ...
DOI:
10.1093/jxb/ers304
PubMed:
23125357
PubMed Central:
PMC3542040

2. AtFH1 formin mutation affects actin filament and microtubule dynamics in Arabidopsis thaliana

Author:
Rosero, Amparo; Žárský, Viktor; Cvrčková, Fatima
Source:
Journal of experimental botany 2013 v.64 no.2 pp. 585-597
ISSN:
0022-0957
Subject:
Arabidopsis thaliana; actin; cell growth; fluorescence microscopy; microtubules; morphogenesis; mutants; mutation; phenotype; polymerization; root growth; roots; seedlings
Abstract:
... Plant cell growth and morphogenesis depend on remodelling of both actin and microtubule cytoskeletons. AtFH1 (At5g25500), the main housekeeping Arabidopsis formin, is targeted to membranes and known to nucleate and bundle actin. The effect of mutations in AtFH1 on root development and cytoskeletal dynamics was examined. Consistent with primarily actin-related formin function, fh1 mutants showed in ...
DOI:
10.1093/jxb/ers351
PubMed:
23202131
PubMed Central:
PMC3542049

3. Blue light is essential for high light acclimation and photoprotection in the diatom Phaeodactylum tricornutum

Author:
Schellenberger Costa, Benjamin; Jungandreas, Anne; Jakob, Torsten; Weisheit, Wolfram; Mittag, Maria; Wilhelm, Christian
Source:
Journal of experimental botany 2013 v.64 no.2 pp. 483-493
ISSN:
0022-0957
Subject:
Phaeodactylum tricornutum; acclimation; blue light; cell membranes; chloroplasts; gene expression regulation; light intensity; light quality; lutein; photostability; photosynthesis; proteins; proteome; red light; zeaxanthin epoxidase
Abstract:
... The objective of the present study was to test the hypothesis that the acclimation to different light intensities in the diatom Phaeodactylum tricornutum is controlled by light quality perception mechanisms. Therefore, semi-continuous cultures of P. tricornutum were illuminated with equal amounts of photosynthetically absorbed radiation of blue (BL), white (WL), and red light (RL) and in combinati ...
DOI:
10.1093/jxb/ers340
PubMed:
23183259
PubMed Central:
PMC3542041

4. Characterization of rapid intervascular transport of cadmium in rice stem by radioisotope imaging

Author:
Kobayashi, Natsuko I.; Tanoi, Keitaro; Hirose, Atsushi; Nakanishi, Tomoko M.
Source:
Journal of experimental botany 2013 v.64 no.2 pp. 507-517
ISSN:
0022-0957
Subject:
cadmium; leaves; phloem; phosphorus; rice; root crown; roots; scintigraphy; seedlings; shoots; transpiration; vascular bundles
Abstract:
... Participation of the intervascular transport system within the rice stem during cadmium (Cd) partitioning was investigated by characterizing 109Cd behaviour in the shoot. In addition, 45Ca, 32P, and 35S partitioning patterns were analysed for comparison with that of 109Cd. Each tracer was applied to the seedling roots for 15min, and the shoots were harvested either at 15min (i.e. immediately after ...
DOI:
10.1093/jxb/ers344
PubMed:
23202130
PubMed Central:
PMC3542043

5. Ethylene promotes hyponastic growth through interaction with ROTUNDIFOLIA3/CYP90C1 in Arabidopsis

Author:
Polko, Joanna K.; Pierik, Ronald; van Zanten, Martijn; Tarkowská, Danuše; Strnad, Miroslav; Voesenek, Laurentius A. C. J.; Peeters, Anton J. M.
Source:
Journal of experimental botany 2013 v.64 no.2 pp. 613-624
ISSN:
0022-0957
Subject:
Arabidopsis thaliana; biosynthesis; biotic stress; brassinosteroids; cell division; cell growth; environmental factors; ethylene; genes; hydroxylation; hypocotyls; mutants; petioles
Abstract:
... Upward leaf movement, called hyponastic growth, is employed by plants to cope with adverse environmental conditions. Ethylene is a key regulator of this process and, in Arabidopsis thaliana, hyponasty is induced by this phytohormone via promotion of epidermal cell expansion in a proximal zone of the abaxial side of the petiole. ROTUNDIFOLIA3/CYP90C1 encodes an enzyme which was shown to catalyse C- ...
DOI:
10.1093/jxb/ers356
PubMed:
23264517
PubMed Central:
PMC3542051

6. Flowering induction in the bioenergy grass Miscanthus sacchariflorus is a quantitative short-day response, whilst delayed flowering under long days increases biomass accumulation

Author:
Jensen, Elaine; Robson, Paul; Norris, John; Cookson, Alan; Farrar, Kerrie; Donnison, Iain; Clifton-Brown, John
Source:
Journal of experimental botany 2013 v.64 no.2 pp. 541-552
ISSN:
0022-0957
Subject:
Miscanthus sacchariflorus; Saccharum; Sorghum (Poaceae); aboveground biomass; bioenergy; biomass production; domestication; energy crops; flowering; genotype; germplasm; grasses; hybrids; latitude; phenology; photoperiod; temperature; triploidy
Abstract:
... Miscanthus sacchariflorus is a fast-growing C4 perennial grass that can naturally hybridize with M. sinensis to produce interspecific hybrids, such as the sterile triploid M.× giganteus. The creation of such hybrids is essential for the rapid domestication of this novel bioenergy crop. However, progress has been hindered by poor understanding of the environmental cues promoting floral transition i ...
DOI:
10.1093/jxb/ers346
PubMed:
23183254
PubMed Central:
PMC3542045

7. Haem oxygenase modifies salinity tolerance in Arabidopsis by controlling K+ retention via regulation of the plasma membrane H+-ATPase and by altering SOS1 transcript levels in roots

Author:
Bose, Jayakumar; Xie, Yanjie; Shen, Wenbiao; Shabala, Sergey
Source:
Journal of experimental botany 2013 v.64 no.2 pp. 471-481
ISSN:
0022-0957
Subject:
Arabidopsis thaliana; salt tolerance; heme oxygenase (biliverdin-producing); gene overexpression; salinity; reactive oxygen species; ion transport; salt stress; potassium; mutants; mammals; plasma membrane; protons; sodium-hydrogen antiporter; roots; membrane potential
Abstract:
... Reactive oxygen species (ROS) production is a common denominator in a variety of biotic and abiotic stresses, including salinity. In recent years, haem oxygenase (HO; EC 1.14.99.3) has been described as an important component of the antioxidant defence system in both mammalian and plant systems. Moreover, a recent report on Arabidopsis demonstrated that HO overexpression resulted in an enhanced sa ...
DOI:
10.1093/jxb/ers343
PubMed:
23307916
PubMed Central:
PMC3542042

8. Herbivore induction of jasmonic acid and chemical defences reduce photosynthesis in Nicotiana attenuata

Author:
Nabity, Paul D.; Zavala, Jorge A.; DeLucia, Evan H.
Source:
Journal of experimental botany 2013 v.64 no.2 pp. 685-694
ISSN:
0022-0957
Subject:
Nicotiana; fluorescence; gas exchange; jasmonic acid; linoleate 13S-lipoxygenase; electron transfer; herbivores; metabolites; carbon; photosynthesis; chlorophyll; leaves
Abstract:
... Herbivory initiates a shift in plant metabolism from growth to defence that may reduce fitness in the absence of further herbivory. However, the defence-induced changes in carbon assimilation that precede this reallocation in resources remain largely undetermined. This study characterized the response of photosynthesis to herbivore induction of jasmonic acid (JA)-related defences in Nicotiana atte ...
DOI:
10.1093/jxb/ers364
PubMed:
23264519
PubMed Central:
PMC3542056

9. Identification of differentially methylated regions during vernalization revealed a role for RNA methyltransferases in bolting

Author:
Hébrard, Claire; Trap-Gentil, Marie-Véronique; Lafon-Placette, Clément; Delaunay, Alain; Joseph, Claude; Lefèbvre, Marc; Barnes, Steve; Maury, Stéphane
Source:
Journal of experimental botany 2013 v.64 no.2 pp. 651-663
ISSN:
0022-0957
Subject:
Arabidopsis; Beta vulgaris; DNA; DNA methylation; apical meristems; bolting; cold stress; environmental factors; epigenetics; flowers; genes; genotype; loci; messenger RNA; methyltransferases; mutants; nucleotide sequences; phenolic compounds; phenotype; precipitin tests; shoots; sugar beet; vernalization
Abstract:
... Sugar beet (Beta vulgaris altissima) is a biennial root crop with an absolute requirement for cold exposure to bolt and flower, a process called vernalization. Global DNA methylation variations have been reported during vernalization in several plants. However, few genes targeted by DNA methylation during vernalization have been described. The objectives of this study were to identify differential ...
DOI:
10.1093/jxb/ers363
PubMed:
23307918

10. Interacting duplications, fluctuating selection, and convergence: the complex dynamics of flowering time evolution during sunflower domestication

Author:
Blackman, Benjamin K.
Source:
Journal of experimental botany 2013 v.64 no.2 pp. 421-431
ISSN:
0022-0957
Subject:
Helianthus annuus; chromosome mapping; domestication; evolution; flowering; genes; loci; nucleotide sequences
Abstract:
... Changes in flowering time and its regulation by environmental signals have played crucial roles in the evolutionary origin and spread of many cultivated plants. Recent investigations into the genetics of flowering time evolution in the common sunflower, Helianthus annuus, have provided insight into the historical and mechanistic dynamics of this process. Genetic mapping studies have confirmed phen ...
DOI:
10.1093/jxb/ers359
PubMed:
23267017

11. Multiple phytohormone signalling pathways modulate susceptibility of tomato plants to Alternaria alternata f. sp. lycopersici

Author:
Jia, Chengguo; Zhang, Liping; Liu, Lihong; Wang, Jiansheng; Li, Chuanyou; Wang, Qiaomei
Source:
Journal of experimental botany 2013 v.64 no.2 pp. 637-650
ISSN:
0022-0957
Subject:
Alternaria alternata; Solanum lycopersicum; biosynthesis; ethylene; fungi; jasmonic acid; pathogens; salicylic acid; tomatoes
Abstract:
... Three phytohormone molecules – ethylene (ET), jasmonic acid (JA) and salicylic acid (SA) – play key roles in mediating disease response to necrotrophic fungal pathogens. This study investigated the roles of the ET, JA, and SA pathways as well as their crosstalk during the interaction between tomato (Solanum lycopersicum) plants and a necrotrophic fungal pathogen Alternaria alternata f. sp. lycoper ...
DOI:
10.1093/jxb/ers360
PubMed:
23264518
PubMed Central:
PMC3542053

12. Partial deficiency of isoleucine impairs root development and alters transcript levels of the genes involved in branched-chain amino acid and glucosinolate metabolism in Arabidopsis

Author:
Yu, Hailan; Zhang, Fengxia; Wang, Guodong; Liu, Yule; Liu, Dong
Source:
Journal of experimental botany 2013 v.64 no.2 pp. 599-612
ISSN:
0022-0957
Subject:
plant development; Arabidopsis; biosynthesis; phenotype; protein synthesis; threonine; enzymes; microarray technology; deamination; gene expression regulation; transfer DNA; biochemical pathways; isoleucine; exons; mutants; protein content; cell proliferation; glucosinolates
Abstract:
... Isoleucine is one of the branched-chain amino acids (BCAAs) that are essential substrates for protein synthesis in all organisms. Although the metabolic pathway for isoleucine has been well characterized in higher plants, it is not known whether it plays a specific role in plant development. In this study, an Arabidopsis mutant, lib (low isoleucine biosynthesis), that has defects in both cell prol ...
DOI:
10.1093/jxb/ers352
PubMed:
23230023
PubMed Central:
PMC3542050

13. PDMP induces rapid changes in vacuole morphology in Arabidopsis root cells

Author:
Krüger, Falco; Krebs, Melanie; Viotti, Corrado; Langhans, Markus; Schumacher, Karin; Robinson, David G.
Source:
Journal of experimental botany 2013 v.64 no.2 pp. 529-540
ISSN:
0022-0957
Subject:
Arabidopsis; biosynthesis; calcium; ceramides; cytoplasmic inclusions; drugs; ions; mammals; protein synthesis; tonoplast; vacuoles
Abstract:
... PDMP (d-l-threo-1-phenyl-2-decanoyl amino-3-morpholino-1-propanol) is a well-known inhibitor of glucosylceramide synthase (GCS), a key enzyme in sphingolipid biosynthesis. Through the resultant increase in ceramides which interact with mTOR and Beclin1 (Atg6), this drug is also known to induce macroautophagy in mammalian cells. This study investigated the response of Arabidopsis root cells to PDMP ...
DOI:
10.1093/jxb/ers345
PubMed:
23230024
PubMed Central:
PMC3542044

14. Plant sex chromosome evolution

Author:
Charlesworth, Deborah
Source:
Journal of experimental botany 2013 v.64 no.2 pp. 405-420
ISSN:
0022-0957
Subject:
dioecy; evolution; hermaphroditism; monoecy; sex chromosomes
Abstract:
... It is now well established that plants have an important place in studies of sex chromosome evolution because of the repeated independent evolution of separate sexes and sex chromosomes. There has been considerable recent progress in studying plant sex chromosomes. In this review, I focus on how these recent studies have helped clarify or answer several important questions about sex chromosome evo ...
DOI:
10.1093/jxb/ers322
PubMed:
23125359

15. Sensing the environment: key roles of membrane-localized kinases in plant perception and response to abiotic stress

Author:
Osakabe, Yuriko; Yamaguchi-Shinozaki, Kazuko; Shinozaki, Kazuo; Phan Tran, Lam-Son
Source:
Journal of experimental botany 2013 v.64 no.2 pp. 445-458
ISSN:
0022-0957
Subject:
Arabidopsis; abscisic acid; crops; environmental factors; genes; genetic engineering; growth and development; histidine kinase; osmotic stress; phosphorylation; plant growth; plant response; plasma membrane; protein-serine-threonine kinases; serine; stress response; threonine
Abstract:
... Adverse environmental conditions have negative effects on plant growth and development. Receptor proteins on the plasma membrane sense various environmental stimuli and transduce them to downstream intra- and intercellular signalling networks. Receptor-like kinases (RLKs) play important roles in perceiving the extracellular ligands and activating the downstream pathway via phosphorylation of intra ...
DOI:
10.1093/jxb/ers354
PubMed:
23307915

16. Signalling of Arabidopsis thaliana response to Pieris brassicae eggs shares similarities with PAMP-triggered immunity

Author:
Gouhier-Darimont, Caroline; Schmiesing, André; Bonnet, Christelle; Lassueur, Steve; Reymond, Philippe
Source:
Journal of experimental botany 2013 v.64 no.2 pp. 665-674
ISSN:
0022-0957
Subject:
Arabidopsis thaliana; NADP (coenzyme); Pieris brassicae; elicitors; genes; immunity; insect eggs; insects; mutants; oviposition; receptors; salicylic acid
Abstract:
... Insect egg deposition activates plant defence, but very little is known about signalling events that control this response. In Arabidopsis thaliana, oviposition by Pieris brassicae triggers salicylic acid (SA) accumulation and induces the expression of defence genes. This is similar to the recognition of pathogen-associated molecular patterns (PAMPs), which are involved in PAMP-triggered immunity ...
DOI:
10.1093/jxb/ers362
PubMed:
23264520
PubMed Central:
PMC3542055

17. Smaller, faster stomata: scaling of stomatal size, rate of response, and stomatal conductance

Author:
Drake, Paul L.; Froend, Ray H.; Franks, Peter J.
Source:
Journal of experimental botany 2013 v.64 no.2 pp. 495-505
ISSN:
0022-0957
Subject:
stomatal movement; risk; correlation; stomatal conductance; carboxylation; gas exchange; water use efficiency; models; electron transfer; Banksia; stomata; water potential
Abstract:
... Maximum and minimum stomatal conductance, as well as stomatal size and rate of response, are known to vary widely across plant species, but the functional relationship between these static and dynamic stomatal properties is unknown. The objective of this study was to test three hypotheses: (i) operating stomatal conductance under standard conditions (g op) correlates with minimum stomatal conducta ...
DOI:
10.1093/jxb/ers347
PubMed:
23264516
PubMed Central:
PMC3542046

18. Stochastic changes affect Solanum wild species following autopolyploidization

Author:
Aversano, Riccardo; Caruso, Immacolata; Aronne, Giovanna; Micco, Veronica De; Scognamiglio, Nunzia; Carputo, Domenico
Source:
Journal of experimental botany 2013 v.64 no.2 pp. 625-635
ISSN:
0022-0957
Subject:
guard cells; allopolyploidy; epigenetics; microsatellite repeats; Solanum commersonii; DNA methylation; diploidy; breeding; tetraploidy; autopolyploidy; potatoes; stomata; Solanum bulbocastanum
Abstract:
... Polyploidy is very common within angiosperms, and several studies are in progress to ascertain the effects of early polyploidization at the molecular, physiological, and phenotypic level. Extensive studies are available only in synthetic allopolyploids. By contrast, less is known about the consequences of autopolyploidization. The current study aimed to assess the occurrence and extent of genetic, ...
DOI:
10.1093/jxb/ers357
PubMed:
23307917
PubMed Central:
PMC3542052

19. The evolution, function, structure, and expression of the plant sHSPs

Author:
Waters, Elizabeth R.
Source:
Journal of experimental botany 2013 v.64 no.2 pp. 391-403
ISSN:
0022-0957
Subject:
Archaea; amino acids; bacteria; embryophytes; evolution; gene expression; heat shock proteins; heat tolerance; life history; pollen; seeds
Abstract:
... Small heat shock proteins are a diverse, ancient, and important family of proteins. All organisms possess small heat shock proteins (sHSPs), indicating that these proteins evolved very early in the history of life prior to the divergence of the three domains of life (Archaea, Bacteria, and Eukarya). Comparing the structures of sHSPs from diverse organisms across these three domains reveals that de ...
DOI:
10.1093/jxb/ers355
PubMed:
23255280

20. The form of nitrogen nutrition affects resistance against Pseudomonas syringae pv. phaseolicola in tobacco

Author:
Gupta, Kapuganti J.; Brotman, Yariv; Segu, Shruthi; Zeier, Tatiana; Zeier, Jürgen; Persijn, Stefan T.; Cristescu, Simona M.; Harren, Frans J. M.; Bauwe, Hermann; Fernie, Alisdair R.; Kaiser, Werner M.; Mur, Luis A. J.
Source:
Journal of experimental botany 2013 v.64 no.2 pp. 553-568
ISSN:
0022-0957
Subject:
Pseudomonas syringae pv. phaseolicola; Pseudomonas syringae pv. tabaci; amino acids; biomarkers; biosynthesis; cell death; fertilizers; fructose; gas chromatography; glucose; hypersensitivity; leaves; mass spectrometry; nitrate reductase; nitric oxide; nitrogen; nutrients; nutrition; pathogens; polyamines; salicylic acid; sucrose; tobacco
Abstract:
... Different forms of nitrogen (N) fertilizer affect disease development; however, this study investigated the effects of N forms on the hypersensitivity response (HR)—a pathogen-elicited cell death linked to resistance. HR-eliciting Pseudomonas syringae pv. phaseolicola was infiltrated into leaves of tobacco fed with either [Formula] or [Formula]. The speed of cell death was faster in [Formula]-fed ...
DOI:
10.1093/jxb/ers348
PubMed:
23230025
PubMed Central:
PMC3542047