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You searched for: Journal Plant physiology Remove constraint Journal: Plant physiology Subject Nicotiana tabacum Remove constraint Subject: Nicotiana tabacum Subject Helianthus annuus Remove constraint Subject: Helianthus annuus Subject term Helianthus annuus Remove constraint Subject term: Helianthus annuus
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1. The Catalytic Properties of Hybrid Rubisco Comprising Tobacco Small and Sunflower Large Subunits Mirror the Kinetically Equivalent Source Rubiscos and Can Support Tobacco Growth

Author:
Sharwood, Robert Edward; von Caemmerer, Susanne; Maliga, Pal; Whitney, Spencer Michael
Source:
Plant physiology 2008 v.146 no.1 pp. 83-96
ISSN:
0032-0889
Subject:
Helianthus annuus; Nicotiana tabacum; apical meristems; carboxylation; chlorophyll; fluorescence; gas exchange; genes; hybrids; leaves; lighting; messenger RNA; phenotype; plant architecture; ribulose-bisphosphate carboxylase; seedlings; seeds; stem elongation; tobacco
Abstract:
... Plastomic replacement of the tobacco (Nicotiana tabacum) Rubisco large subunit gene (rbcL) with that from sunflower (Helianthus annuus; rbcLS) produced tobaccoRst transformants that produced a hybrid Rubisco consisting of sunflower large and tobacco small subunits (LsSt). The tobaccoRst plants required CO₂ (0.5% v/v) supplementation to grow autotrophically from seed despite the substrate saturated ...
DOI:
10.1104/pp.107.109058
PubMed:
17993544
PubMed Central:
PMC2230571

2. Impacts of T-Phylloplanin Gene Knockdown and of Helianthus and Datura Phylloplanins on Peronospora tabacina Spore Germination and Disease Potential

Author:
Kroumova, Antoaneta B.; Shepherd, Ryan W.; Wagner, George J.
Source:
Plant physiology 2007 v.144 no.4 pp. 1843-1851
ISSN:
0032-0889
Subject:
RNA interference; Helianthus annuus; Glycine max; leaf protein; messenger RNA; Datura stramonium; plant diseases and disorders; Peronospora tabacina; trichomes; soybeans; pathogens; Nicotiana tabacum; Datura metel; genes; spore germination; tobacco; leaves; antifungal properties
Abstract:
... T-phylloplanin proteins secreted to aerial surfaces of tobacco (Nicotiana tabacum) by short procumbent trichomes inhibit spore germination and blue mold disease caused by the oomycete pathogen Peronospora tabacina. Many other plants were found to contain water-washed leaf surface proteins (phylloplanins), but the functions and properties of these are not known. Here we extend earlier evidence for ...
DOI:
10.1104/pp.107.097584
PubMed:
17573541
PubMed Central:
PMC1949898

3. Importance of the chiral centers of jasmonic acid in the responses of plants. Activities and antagonism between natural and synthetic analogs

Author:
Holbrook, L.; Tung, P.; Ward, K.; Reid, D.M.; Abrams, S.; Lamb, N.; Quail, J.W.; Moloney, M.M.
Source:
Plant physiology 1997 v.114 no.2 pp. 419-428
ISSN:
0032-0889
Subject:
Helianthus annuus; Brassica napus; measurement; chemical degradation; dose response; jasmonic acid; gene expression; Triticum aestivum; Nicotiana tabacum; esters; stereochemistry; enzyme activity; chemical structure; seed germination; transgenic plants; cotyledons; proteinase inhibitors; reporter genes; chemical constituents of plants; chlorophyll; beta-glucuronidase
Abstract:
... The importance of the two chiral centers at C-3 and C-7 in the molecular structure of jasmonic acid in plant responses was investigated. We separated methyl jasmonate (MeJA) into (3R)- and (3S)-isomers with a fixed stereochemistry at C-3, but epimerization at C-7 is possible. The four isomers of the nonepimerizable analog 7-methyl MeJA were synthesized. These six esters and their corresponding aci ...

4. Improved Resistance to Controlled Deterioration in Transgenic Seeds

Author:
Prieto-Dapena, Pilar; Castaño, Raúl; Almoguera, Concepción; Jordano, Juan
Source:
Plant physiology 2006 v.142 no.3 pp. 1102-1112
ISSN:
0032-0889
Subject:
Helianthus annuus; Nicotiana tabacum; crops; gene expression; heat shock proteins; heat stress; heat tolerance; imbibition; longevity; oligosaccharides; plant development; seed yield; seeds; tobacco; transcription factors
Abstract:
... We show that seed-specific overexpression of the sunflower (Helianthus annuus) HaHSFA9 heat stress transcription factor (HSF) in tobacco (Nicotiana tabacum) enhances the accumulation of heat shock proteins (HSPs). Among these proteins were HSP101 and a subset of the small HSPs, including proteins that accumulate only during embryogenesis in the absence of thermal stress. Levels of late embryogenes ...
DOI:
10.1104/pp.106.087817
PubMed:
16998084
PubMed Central:
PMC1630740

5. Lateral CO₂ Diffusion inside Dicotyledonous Leaves Can Be Substantial: Quantification in Different Light Intensities

Author:
Morison, James I.L.; Lawson, Tracy; Cornic, Gabriel
Source:
Plant physiology 2007 v.145 no.3 pp. 680-690
ISSN:
0032-0889
Subject:
Vicia faba; Helianthus annuus; Zea mays; tobacco; Petunia hybrida; fluorescence; gas exchange; faba beans; corn; leaf area; Phaseolus vulgaris; light intensity; Nicotiana tabacum; photosynthesis; chlorophyll; stomata
Abstract:
... Substantial lateral CO₂ diffusion rates into leaf areas where stomata were blocked by grease patches were quantified by gas exchange and chlorophyll a fluorescence imaging in different species across the full range of photosynthetic photon flux densities (PPFD). The lateral CO₂ flux rate over short distances was substantial and very similar in five dicotyledonous species with different vascular an ...
DOI:
10.1104/pp.107.107318
PubMed:
17905868
PubMed Central:
PMC2048780

6. Plastome engineering of ribulose-1,5-bisphosphate carboxylase/oxygenase in tobacco to form a sunflower large subunit and tobacco small subunit hybrid

Author:
Kanevski, I.; Maliga, P.; Rhoades, D.F.; Gutteridge, S.
Source:
Plant physiology 1999 v.119 no.1 pp. 133-141
ISSN:
0032-0889
Subject:
Nicotiana tabacum; Helianthus annuus; Synechococcus; plastids; genetic transformation; gene transfer; genetic engineering; genetic markers; genetic code; ribulose-bisphosphate carboxylase; photosynthesis; enzyme activity; transgenic plants; hybrids; genetic variation; amino acid sequences
Abstract:
... Targeted gene replacement in plastids was used to explore whether the rbcL gene thatcodes for the large subunit of ribulose-1,5-bisphosphate carboxylase/oxygenase, the key enzyme of photosynthetic CO2 fixation, might be replaced with altered forms of the gene. Tobacco (Nicotiana tabacum) plants were transformed with plastid DNA that contained the rbcL gene from either sunflower (Helianthus annuus) ...
PubMed:
9880354
PubMed Central:
PMC32212

7. Quantum yields and rate constants of photochemical and nonphotochemical excitation quenching. Experiment and model

Author:
Laisk, A.; Oja, V.; Rasulov, B.; Eichelmann, H.; Sumberg, A.
Source:
Plant physiology 1997 v.115 no.2 pp. 803-815
ISSN:
0032-0889
Subject:
Helianthus annuus; ion transport; light intensity; photoinhibition; measurement; carbon dioxide; dose response; Gossypium hirsutum; light harvesting complex; electron transfer; Sorghum bicolor; Nicotiana tabacum; leaves; Amaranthus cruentus; mathematical models; equations; net assimilation rate; temperature; prediction; cytochrome b
Abstract:
... Sunflower (Helianthus annuus L.), cotton (Gossypium hirsutum L.), tobacco (Nicotiana tabacum L.), sorghum (Sorghum bicolor Moench.), amaranth (Amaranthus cruentus L.), and cytochrome b6f complex-deficient transgenic tobacco leaves were used to test the response of plants exposed to different light intensities and CO2 concentrations before and after photoinhibition at 4000 micromoles photons m-2 s- ...

8. Reversible heat-induced inactivation of chimeric beta-glucuronidase in transgenic plants

Author:
Almoguera, C.; Rojas, A.; Jordano, J.
Source:
Plant physiology 2002 v.129 no.1 pp. 333-341
ISSN:
0032-0889
Subject:
Helianthus annuus; Nicotiana tabacum; tobacco; transgenic plants; seedlings; seeds; plant proteins; heat shock proteins; recombinant proteins; gene expression; messenger RNA; biosynthesis; heat stress; beta-glucuronidase; genetic markers; protein products; enzyme activity; temperature; plant extracts; amino acid sequences; nucleotide sequences; chemical constituents of plants; transcription (genetics); stress response
Abstract:
... We compared the expression patterns in transgenic tobacco (Nicotiana tabacum) of two chimeric genes: a translational fusion to beta-glucuronidase (GUS) and a transcriptional fusion, both with the same promoter and 5'-flanking sequences of Ha hsp17.7 G4, a small heat shock protein (sHSP) gene from sunflower (Helianthus annuus). We found that immediately after heat shock, the induced expression from ...
PubMed:
12011363
PubMed Central:
PMC155896

9. Selective activation of the developmentally regulated Ha hsp17.6 G1 promoter by heat stress transcription factors

Author:
Rojas, A.; Almoguera, C.; Carranco, R.; Scharf, K.D.; Jordano, J.
Source:
Plant physiology 2002 v.129 no.3 pp. 1207-1215
ISSN:
0032-0889
Subject:
Helianthus annuus; Solanum peruvianum; promoter regions; plant proteins; tomatoes; heat stress; response elements; Nicotiana tabacum; transcription factors; mutation; oilseed crops; tobacco; heat shock proteins; protoplasts; transcriptional activation; transgenic plants; embryo (plant); Saccharomyces cerevisiae; binding sites; DNA-binding proteins; chemical constituents of plants
Abstract:
... Using two well-characterized heat stress transcription factors (Hsfs) from tomato (Lycopersicon peruvianum; LpHsfA1 and LpHsfA2), we analyzed the transcriptional activation of the Ha hsp17.6 G1 promoter in sunflower (Helianthus annuus) embryos. In this system, we observed transient promoter activation only with LpHsfA2. In contrast, both factors were able to activate mutant versions of the promote ...
PubMed:
12114574
PubMed Central:
PMC166514

10. Stimulation by light of rapid pH regulation in the chloroplast stroma in vivo as indicated by CO2 solubilization in leaves

Author:
Hauser, M.; Eichelmann, H.; Oja, V.; Heber, U.; Laisk, A.
Source:
Plant physiology 1995 v.108 no.3 pp. 1059-1066
ISSN:
0032-0889
Subject:
Brassica oleracea; Helianthus annuus; Nicotiana tabacum; leaves; chloroplasts; pH; light; carbon dioxide; dose response; solubility; oxygen; gas exchange; quantitative analysis; bicarbonates
Abstract:
... Leaves of Brassica oleracea, Helianthus annuus, and Nicotiana rustica were exposed for 20 s to high concentrations of CO2. CO2 uptake by the leaf, which was very fast, was measured as a transient increase in the concentration of oxygen. Rapid solubilization of CO2 in excess of that which is physically dissolved in aqueous phases is proposed to be caused by bicarbonate formation in the stroma of ch ...