65 results found
Osborne OG, De-Kayne R, Bidartondo MI, et al., Arbuscular mycorrhizal fungi promote coexistence and niche divergence of sympatric palm species on a remote oceanic island, New Phytologist, ISSN: 0028-646X
Barlow NE, Smpokou E, Friddin MS, et al., 2017, Engineering plant membranes using droplet interface bilayers, BIOMICROFLUIDICS, Vol: 11, ISSN: 1932-1058
Kanvil S, Pham J, Lopez-Cobollo R, et al., 2017, Cucurbit extrafascicular phloem has strong negative impacts on aphids and is not a preferred feeding site., Plant Cell Environ
Cucurbits have long been known to possess two types of phloem: fascicular (FP) within vascular bundles and extrafascicular phloem (EFP) surrounding vascular bundles and scattered through the cortex. Recently, their divergent composition was revealed, with FP having high sugar content consistent with conventional phloem, but EFP having much lower sugar levels and a very different proteome. However, the evolutionary advantages of possessing both FP and EFP have remained unclear. Here, we present four lines of quantitative evidence that together support the hypothesis that FP represents a typical phloem and is an attractive diet for aphids, whereas aphids avoid feeding on EFP. First, aphid stylet track endings were more abundant near the abaxial FP element of minor veins, suggesting a feeding preference for FP over EFP. Second, sugar profiles from stylet exudates were wholly consistent with FP origins, further supporting preference for FP and avoidance of EFP. Third, supplementation of EFP exudate into artificial diets confirmed an aversion to EFP in choice experiments. Finally, EFP exudate had negative effects on aphid performance. On the basis of aphids' inability to thrive on EFP, we conclude that EFP is atypical and perhaps should not be classed as a phloem system.
Dunning LT, Hipperson H, Baker WJ, et al., 2016, Ecological speciation in sympatric palms: 1. Gene expression, selection and pleiotropy, JOURNAL OF EVOLUTIONARY BIOLOGY, Vol: 29, Pages: 1472-1487, ISSN: 1010-061X
Larrieu A, Champion A, Legrand J, et al., 2016, A fluorescent hormone biosensor reveals the dynamics of jasmonate signalling in plants (vol 6, 6043, 2015), NATURE COMMUNICATIONS, Vol: 7, ISSN: 2041-1723
Lopez-Cobollo RM, Filippis I, Bennett MH, et al., 2016, Comparative proteomics of cucurbit phloem indicates both unique and shared sets of proteins, PLANT JOURNAL, Vol: 88, Pages: 633-647, ISSN: 0960-7412
de Saint Germain A, Clave G, Badet-Denisot M-A, et al., 2016, An histidine covalent receptor and butenolide complex mediates strigolactone perception, NATURE CHEMICAL BIOLOGY, Vol: 12, Pages: 787-+, ISSN: 1552-4450
Antoniadi I, Plackova L, Simonovik B, et al., 2015, Cell-Type-Specific Cytokinin Distribution within the Arabidopsis Primary Root Apex, PLANT CELL, Vol: 27, Pages: 1955-1967, ISSN: 1040-4651
Kanvil S, Collins CM, Powell G, et al., 2015, Cryptic Virulence and Avirulence Alleles Revealed by Controlled Sexual Recombination in Pea Aphids, GENETICS, Vol: 199, Pages: 581-593, ISSN: 0016-6731
Larrieu A, Champion A, Legrand J, et al., 2015, A fluorescent hormone biosensor reveals the dynamics of jasmonate signalling in plants, Nature Communications, Vol: 6, ISSN: 2041-1723
Grafting provides a simple way to generate chimeric plants with regions of different genotypes and thus to assess the cell autonomy of gene action. The technique of grafting has been widely used in other species, but in Arabidopsis, its small size makes the process rather more demanding. However, there are now several well-established grafting procedures available, which we described here, and their use has already contributed greatly to understanding of such processes as shoot branching control, flowering, disease resistance, and systemic silencing.
Bromley JR, Warnes BJ, Newell CA, et al., 2014, A purine nucleoside phosphorylase in Solanum tuberosum L. (potato) with specificity for cytokinins contributes to the duration of tuber endodormancy, BIOCHEMICAL JOURNAL, Vol: 458, Pages: 225-237, ISSN: 0264-6021
Kanvil S, Powell G, Turnbull C, 2014, Pea aphid biotype performance on diverse Medicago host genotypes indicates highly specific virulence and resistance functions, BULLETIN OF ENTOMOLOGICAL RESEARCH, Vol: 104, Pages: 689-701, ISSN: 0007-4853
Young NF, Ferguson BJ, Antoniadi I, et al., 2014, Conditional Auxin Response and Differential Cytokinin Profiles in Shoot Branching Mutants., Plant physiology, Vol: 165, Pages: 1723-1736, ISSN: 0032-0889
Strigolactone (SL), auxin, and cytokinin (CK) are hormones that interact to regulate shoot branching. For example, several ramosus (rms) branching mutants in pea (Pisum sativum) have SL defects, perturbed xylem CK levels, and diminished responses to auxin in shoot decapitation assays. In contrast with the last of these characteristics, we discovered that buds on isolated nodes (explants) of rms plants instead respond normally to auxin. We hypothesized that the presence or absence of attached roots would result in transcriptional and hormonal differences in buds and subtending stem tissues, and might underlie the differential auxin response. However, decapitated plants and explants both showed similar up-regulation of CK biosynthesis genes, increased CK levels, and down-regulation of auxin transport genes. Moreover, auxin application counteracted these trends, regardless of the effectiveness of auxin at inhibiting bud growth. Multivariate analysis revealed that stem transcript and CK changes were largely associated with decapitation and/or root removal and auxin response, whereas bud transcript profiles related more to SL defects. CK clustering profiles were indicative of additional zeatin-type CKs in decapitated stems being supplied by roots and thus promoting bud growth in SL-deficient genotypes even in the presence of added auxin. This difference in CK content may explain why rms buds on explants respond better to auxin than those on decapitated plants. We further conclude that rapid changes in CK status in stems are auxin dependent but largely SL independent, suggesting a model in which auxin and CK are dominant regulators of decapitation-induced branching, whereas SLs are more important in intact plants.
Littlewood J, Wang L, Turnbull C, et al., 2013, Techno-economic potential of bioethanol from bamboo in China, BIOTECHNOLOGY FOR BIOFUELS, Vol: 6, ISSN: 1754-6834
Turnbull CGN, Lopez-Cobollo RM, 2013, Heavy traffic in the fast lane: long-distance signalling by macromolecules, NEW PHYTOLOGIST, Vol: 198, Pages: 33-51, ISSN: 0028-646X
Braun N, de Saint Germain A, Pillot J-P, et al., 2012, The Pea TCP Transcription Factor PsBRC1 Acts Downstream of Strigolactones to Control Shoot Branching, PLANT PHYSIOLOGY, Vol: 158, Pages: 225-238, ISSN: 0032-0889
Hardner CM, Peace C, Vithanage V, et al., 2012, Genetic Resources and Improvement in Macadamia, 1st International Symposium on Wild Relatives of Subtropical and Temperate Fruit and Nut Crops, Publisher: INT SOC HORTICULTURAL SCIENCE, Pages: 253-262, ISSN: 0567-7572
Turnbull C, 2011, Long-distance regulation of flowering time, JOURNAL OF EXPERIMENTAL BOTANY, Vol: 62, Pages: 4399-4413, ISSN: 0022-0957
Truman WM, Bennett MH, Turnbull CGN, et al., 2010, Arabidopsis Auxin Mutants Are Compromised in Systemic Acquired Resistance and Exhibit Aberrant Accumulation of Various Indolic Compounds, PLANT PHYSIOLOGY, Vol: 152, Pages: 1562-1573, ISSN: 0032-0889
Turnbull CGN, 2010, Grafting as a research tool., Methods Mol Biol, Vol: 655, Pages: 11-26
Grafting as a means to connect different plant tissues has been enormously useful in many studies of long-distance signalling and transport in relation to regulation of development and physiology. There is an almost infinite number of pairwise graft combinations that can be tested, typically between two different genotypes and/or between plants previously exposed to different environmental treatments. Grafting experiments are especially powerful for unambiguous demonstration of spatial separation of source and target, including genetic complementation of mutant phenotypes across a graft union, direct detection of transmitted molecules in receiving tissue or vascular sap, and activation or suppression of molecular targets due to signal transmission. Although grafting has a long history in research, only in the past decade has it been applied extensively to the Arabidopsis model. This chapter compares the main Arabidopsis grafting methods now available and describes seedling grafting in detail. Information is also provided on grafting of other common research model species, together with outlines of some successful applications.
Zhang B, Tolstikov V, Turnbull C, et al., 2010, Divergent metabolome and proteome suggest functional independence of dual phloem transport systems in cucurbits, PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA, Vol: 107, Pages: 13532-13537, ISSN: 0027-8424
Cazzonelli CI, Cuttriss AJ, Cossetto SB, et al., 2009, Regulation of Carotenoid Composition and Shoot Branching in Arabidopsis by a Chromatin Modifying Histone Methyltransferase, SDG8, PLANT CELL, Vol: 21, Pages: 39-53, ISSN: 1040-4651
Corbesier L, Vincent C, Jang S, et al., 2007, FT protein movement contributes to long-distance signaling in floral induction of Arabidopsis, SCIENCE, Vol: 316, Pages: 1030-1033, ISSN: 0036-8075
Foo E, Morris SE, Parmenter K, et al., 2007, Feedback regulation of xylem cytokinin content is conserved in pea and arabidopsis, PLANT PHYSIOLOGY, Vol: 143, Pages: 1418-1428, ISSN: 0032-0889
Truman W, Bennettt MH, Kubigsteltig I, et al., 2007, Arabidopsis systemic immunity uses conserved defense signaling pathways and is mediated by jasmonates, PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA, Vol: 104, Pages: 1075-1080, ISSN: 0027-8424
Grafting provides a simple way to generate chimeric plants with regions of different genotypes, and thus to assess the cell autonomy of gene action. The technique of grafting has been widely used in other species, but in Arabidopsis, its small size makes the process rather more complicated. However, there are now several well-established grafting procedures available, which we described here, and their use has already contributed greatly to understanding of such processes as shoot branching control, flowering, and disease resistance.
Booker J, Sieberer T, Wright W, et al., 2005, MAX1 encodes a cytochrome P450 family member that acts downstream of MAX3/4 to produce a carotenoid-derived branch-inhibiting hormone, DEVELOPMENTAL CELL, Vol: 8, Pages: 443-449, ISSN: 1534-5807
Turnbull CGN ed, 2005, Plant architecture and its manipulation, UK, Publisher: Blackwell, ISBN: 9781405121286
Turnbull CGN, 2005, Shoot Architecture II: Control of Branching, Plant Architecture and Its Manipulation. Annual Plant Reviews Volume 17, Editors: CGN, UK, Publisher: Blackwell, ISBN: 9781405121286
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