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You searched for: Journal name Plant physiology Remove constraint Journal name: Plant physiology Subject Helianthus annuus Remove constraint Subject: Helianthus annuus
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1. Stomatal Responses to Flooding of the Intercellular Air Spaces Suggest a Vapor-Phase Signal Between the Mesophyll and the Guard Cells

Author:
Sibbernsen, Erik; Mott, Keith A.
Source:
Plant physiology 2010 v.153 no.3 pp. 1435-1442
ISSN:
0032-0889
Subject:
guard cells; stomata; intercellular spaces; stomatal movement; Helianthus annuus; Tradescantia; silicone; floods; xylem; oils; potassium chloride; hydrophobicity; Lactuca serriola; mesophyll; Oenothera; filters
Abstract:
... Flooding the intercellular air spaces of leaves with water was shown to cause rapid closure of stomata in Tradescantia pallida, Lactuca serriola, Helianthus annuus, and Oenothera caespitosa. The response occurred when water was injected into the intercellular spaces, vacuum infiltrated into the intercellular spaces, or forced into the intercellular spaces by pressurizing the xylem. Injecting 50 mM ...
DOI:
10.1104/pp.110.157685
PubMed:
20472750
PubMed Central:
PMC2899896

2. The Mechanisms Involved in Seed Dormancy Alleviation by Hydrogen Cyanide Unravel the Role of Reactive Oxygen Species as Key Factors of Cellular Signaling during Germination

Author:
Oracz, Krystyna; El-Maarouf-Bouteau, Hayat; Kranner, Ilse; Bogatek, Renata; Corbineau, Françoise; Bailly, Christophe
Source:
Plant physiology 2009 v.150 no.1 pp. 494-505
ISSN:
0032-0889
Subject:
Helianthus annuus; NADP (coenzyme); after-ripening; catalase; ethylene; gene expression; gluconeogenesis; glutathione; hydrogen cyanide; hydrogen peroxide; imbibition; lipids; mechanism of action; menadione; models; second messengers; seed dormancy; seed germination; sunflower seed; superoxide anion; superoxide dismutase
Abstract:
... The physiological dormancy of sunflower (Helianthus annuus) embryos can be overcome during dry storage (after-ripening) or by applying exogenous ethylene or hydrogen cyanide (HCN) during imbibition. The aim of this work was to provide a comprehensive model, based on oxidative signaling by reactive oxygen species (ROS), for explaining the cellular mode of action of HCN in dormancy alleviation. Bene ...
DOI:
10.1104/pp.109.138107
PubMed:
19329562
PubMed Central:
PMC2675718

3. 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

4. Helianthus Nighttime Conductance and Transpiration Respond to Soil Water But Not Nutrient Availability

Author:
Howard, Ava R.; Donovan, Lisa A.
Source:
Plant physiology 2007 v.143 no.1 pp. 145-155
ISSN:
0032-0889
Subject:
Helianthus annuus; Helianthus petiolaris; gas exchange; leaves; mass flow; nutrient availability; plant reproduction; roots; soil nutrients; soil water; soil water content; stomatal conductance
Abstract:
... We investigated the response of Helianthus species nighttime conductance (gnight) and transpiration (Enight) to soil nutrient and water limitations in nine greenhouse studies. The studies primarily used wild Helianthus annuus, but also included a commercial and early domesticate of H. annuus and three additional wild species (Helianthus petiolaris Nutt., Helianthus deserticola Heiser, and Helianth ...
DOI:
10.1104/pp.106.089383
PubMed:
17142487
PubMed Central:
PMC1761982

5. 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

6. 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

7. Modification of Leaf Apoplastic pH in Relation to Stomatal Sensitivity to Root-Sourced Abscisic Acid Signals

Author:
Jia, Wensuo; Davies, William John
Source:
Plant physiology 2007 v.143 no.1 pp. 68-77
ISSN:
0032-0889
Subject:
stomatal movement; tomatoes; Helianthus annuus; soil water content; Commelina communis; nitrogen; shoots; signal transduction; transpiration; sap; nitrates; pH; protons; abscisic acid; stomata; xylem; roots; Solanum lycopersicum var. lycopersicum
Abstract:
... The confocal microscope was used to determine the pH of the leaf apoplast and the pH of microvolumes of xylem sap. We quantified variation in leaf apoplast and sap pH in relation to changes in edaphic and atmospheric conditions that impacted on stomatal sensitivity to a root-sourced abscisic acid signal. Several plant species showed significant changes in the pH of both xylem sap and the apoplast ...
DOI:
10.1104/pp.106.089110
PubMed:
17098853
PubMed Central:
PMC1761989

8. 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

9. Functional Interaction between Two Transcription Factors Involved in the Developmental Regulation of a Small Heat Stress Protein Gene Promoter

Author:
Díaz-Martín, Juan; Almoguera, Concepción; Prieto-Dapena, Pilar; Espinosa, José M.; Jordano, Juan
Source:
Plant physiology 2005 v.139 no.3 pp. 1483-1494
ISSN:
0032-0889
Subject:
heat shock proteins; transcription factors; transcriptional activation; Helianthus annuus; plant biochemistry; plant genetics; amino acid sequences; promoter regions
Abstract:
... Hahsp17.6G1 is the promoter of a small heat stress protein (sHSP) from sunflower (Helianthus annuus) that is activated during zygotic embryogenesis, but which does not respond to heat stress. We report here the cloning of a transcription factor (TF), sunflower drought-responsive element binding factor 2 (HaDREB2), by one-hybrid interaction with functional cis-elements in Hahsp17.6G1. We have analy ...
DOI:
10.1104/pp.105.069963
PubMed:
16244139
PubMed Central:
PMC1283783

10. Lateral Diffusion of CO₂ in Leaves Is Not Sufficient to Support Photosynthesis

Author:
Morison, James I.L.; Galloue̊t, Emily; Lawson, Tracy; Cornic, Gabriel; Herbin, Raphaèle; Baker, Neil R.
Source:
Plant physiology 2005 v.139 no.1 pp. 254-266
ISSN:
0032-0889
Subject:
Commelina communis; Helianthus annuus; Phaseolus vulgaris; beans; leaves; photosynthesis; carbon dioxide; diffusion; gas exchange; chlorophyll; fluorescence; plant physiology
Abstract:
... Lateral diffusion of CO₂ was investigated in photosynthesizing leaves with different anatomy by gas exchange and chlorophyll a fluorescence imaging using grease to block stomata. When one-half of the leaf surface of the heterobaric species Helianthus annuus was covered by 4-mm-diameter patches of grease, the response of net CO₂ assimilation rate (A) to intercellular CO₂ concentration (C[subscript ...
DOI:
10.1104/pp.105.062950
PubMed:
16113223
PubMed Central:
PMC1203375

11. Nitrate does not result in iron inactivation in the apoplast of sunflower leaves

Author:
Nikolic, M.; Romheld, V.
Source:
Plant physiology 2003 v.132 no.3 pp. 1303-1314
ISSN:
0032-0889
Subject:
plant growth; nutrient transport; Helianthus annuus; iron; nutrient uptake; sap; pH; chlorosis; nutrient solutions; xylem; chlorophyll; ammonium nitrate; leaves
DOI:
10.1104/pp.102.017889
PubMed:
12857812
PubMed Central:
PMC167070

12. Overexpression of a gene encoding hydrogen peroxide-generating oxalate oxidase evokes defense responses in sunflower

Author:
Hu, X.; Bidney, D.L.; Yalpani, N.; Duvick, J.P.; Crasta, O.; Folkerts, O.; Lu, G.H.
Source:
Plant physiology 2003 v.133 no.1 pp. 170-181
ISSN:
0032-0889
Subject:
Helianthus annuus; lesions (plant); wheat; plant pathogenic fungi; salicylic acid; hydrogen peroxide; fungal diseases of plants; Triticum aestivum; Sclerotinia sclerotiorum; gene overexpression; host plants; pathogenesis-related proteins; hypersensitive response; grain crops; transgenes; biosynthesis; transgenic plants; oxidoreductases; nucleotide sequences
DOI:
10.1104/pp.103.024026
PubMed:
12970484
PubMed Central:
PMC196595

13. 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

14. 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

15. Cavitation fatigue. Embolism and refilling cycles can weaken the cavitation resistance of xylem

Author:
Hacke, U.G.; Stiller, V.; Sperry, J.S.; Pittermann, J.; McCulloh, K.A.
Source:
Plant physiology 2001 v.125 no.2 pp. 779-786
ISSN:
0032-0889
Subject:
Alnus incana; Populus angustifolia; Populus tremuloides; Helianthus annuus; Aesculus hippocastanum; petioles; stems; xylem; Acer negundo; soil water content; water stress; drought; permeability; cellulose
Abstract:
... Although cavitation and refilling cycles could be common in plants, it is unknown whether these cycles weaken the cavitation resistance of xylem. Stem or petiole segments were tested for cavitation resistance before and after a controlled cavitation-refilling cycle. Cavitation was induced by centrifugation, air drying of shoots, or soil drought. Except for droughted plants, material was not signif ...
PubMed:
11161035
PubMed Central:
PMC64879

16. Cell-type-specific expression of plant cytochrome c mRNA in developing flowers and roots

Author:
Ribichich, K.F.; Tioni, M.F.; Chan, R.L.; Gonzalez, D.H.
Source:
Plant physiology 2001 v.125 no.4 pp. 1603-1610
ISSN:
0032-0889
Subject:
plant development; messenger RNA; Helianthus annuus; corolla; anthers; flower primordia; gene expression; cytochrome c; xylem; meiosis; roots
Abstract:
... We have used RNA in situ hybridization to analyze the expression of transcripts encoding cytochrome c in different tissues and organs of sunflower (Helianthus annuus). Although northern-blot hybridization experiments indicate that the relative abundance of transcripts does not vary greatly, we have detected important changes in localization during flower development. Enhanced expression is observe ...
PubMed:
11299342
PubMed Central:
PMC88818

17. Does growth correlate with turgor-induced elastic strain in stems? A re-evaluation of de Vries classical experiments

Author:
Peters, W.S.; Farm, M.S.; Kopf, A.J.
Source:
Plant physiology 2001 v.125 no.4 pp. 2173-2179
ISSN:
0032-0889
Subject:
Helianthus annuus; turgor; hypocotyls; seedling growth; cell walls; light; seedlings; etiolation
Abstract:
... The correlation between growth and turgor-induced elastic expansion was studied in hypocotyls of sunflower (Helianthus annuus) seedlings under various growth conditions. Turgor-induced elastic cell wall strain was greater in hypocotyls of faster growing seedlings, i.e. in etiolated versus light-grown ones. It also was higher in rapidly growing young seedlings as compared with nongrowing mature one ...
PubMed:
11299396
PubMed Central:
PMC88872

18. The mechanic state of "inner tissue" in the growing zone of sunflower hypocotyls and the regulation of its growth rate following excision

Author:
Peters, W.S.; Tomos, A.D.
Source:
Plant physiology 2000 v.123 no.2 pp. 605-612
ISSN:
0032-0889
Subject:
Helianthus annuus; hypocotyls; turgor; plasmolysis; plant tissues; water uptake; length
PubMed:
10859190
PubMed Central:
PMC59028

19. Apoplastic pH and Fe3+ reduction in intact sunflower leaves

Author:
Kosegarten, H.U.; Hoffmann, B.; Mengel, K.
Source:
Plant physiology 1999 v.121 no.4 pp. 1069-1079
ISSN:
0032-0889
Subject:
Helianthus annuus; hydrogen ions; cell walls; fluorescence; nutrient deficiencies; iron; ion transport; oxidoreductases; plant veins; sap; pH; chlorosis; plasma membrane; xylem; enzyme activity; ammonium nitrate; leaves
Abstract:
... It has been hypothesized that under NO3(-) nutrition a high apoplastic pH in leaves depresses Fe(3+) reductase activity and thus the subsequent Fe(2+) transport across the plasmalemma, inducing Fe chlorosis. The apoplastic pH in young green leaves of sunflower (Helianthus annuus L.) was measured by fluorescence ratio after xylem sap infiltration. It was shown that NO3(-) nutrition significantly in ...

20. Identification, separation, and characterization of acyl-coenzyme A dehydrogenases involved in mitochondrial beta-oxidation in higher plants

Author:
Bode, K.; Hooks, M.A.; Couee, I.
Source:
Plant physiology 1999 v.119 no.4 pp. 1305-1314
ISSN:
0032-0889
Subject:
seed germination; root tips; Zea mays; Helianthus annuus; seeds; peroxisomes; complementary DNA; assays; catalase; biochemical pathways; mitochondria; acyl-CoA dehydrogenase; oxidation; nucleotide sequences; enzyme activity; hydro-lyases
Abstract:
... The existence in higher plants of an additional beta-oxidation system in mitochondria, besides the well-characterized peroxisomal system, is often considered controversial. Unequivocal demonstration of beta-oxidation activity in mitochondria should rely on identification of the enzymes specific to mitochondrial beta-oxidation. Acylcoenzyme A dehydrogenase (ACAD) (EC 1.3.99.2,3) activity was detect ...