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  1. Novel type II cell wall architecture in dichlobenil-habituated maize calluses.

    Planta 229(3):617 (2009) PMID 19048286

    Growth of maize (Zea mays L.) callus-culture cells was inhibited using dichlobenil (2,6 dichlorobenzonitrile, DCB) concentrations > or =1 microM; I (50) value for the effect on inhibited fresh weight gain was 1.5 microM. By increasing the DCB concentration in the culture medium, DCB-habituated c...
  2. Galactose metabolism in cell walls of opening and senescing petunia petals.

    Planta 229(3):709 (2009) PMID 19082620

    Galactose was the major non-cellulosic neutral sugar present in the cell walls of 'Mitchell' petunia (Petunia axillaris x P. axillaris x P. hybrida) flower petals. Over the 24 h period associated with flower opening, there was a doubling of the galactose content of polymers strongly associated w...
  3. A novel role of BELL1-like homeobox genes, PENNYWISE and POUND-FOOLISH, in floral patterning.

    Planta 229(3):693 (2009) PMID 19082619

    Flowers are determinate shoots comprised of perianth and reproductive organs displayed in a whorled phyllotactic pattern. Floral organ identity genes display region-specific expression patterns in the developing flower. In Arabidopsis, floral organ identity genes are activated by LEAFY (LFY), wh...
  4. Remodelling of arabinoxylan in wheat (Triticum aestivum) endosperm cell walls during grain filling.

    Planta 229(3):667 (2009) PMID 19066942

    Previous studies using spectroscopic imaging have allowed the spatial distribution of structural components in wheat endosperm cell walls to be determined. FT-IR microspectroscopy showed differing changes in arabinoxylan (AX) structure, during grain development under cool/wet and hot/dry growing...
  5. Botryticides affect grapevine leaf photosynthesis without inducing defense mechanisms.

    Planta 229(3):497 (2009) PMID 19002490

    The effects of the two botryticides, fludioxonil (fdx) and fenhexamid (fhd), were investigated on grapevine leaves (Vitis vinifera L. cv. Pinot noir) following photosynthesis and defense mechanisms. Treatments were carried out in vineyard at the end of flowering. Phytotoxicity of both fungicides...
  6. Identification of OsbZIP72 as a positive regulator of ABA response and drought tolerance in rice.

    Planta 229(3):605 (2009) PMID 19048288

    Abscisic Acid (ABA) is an important phytohormone involved in abiotic stress resistance in plants. A group of bZIP transcription factors play important roles in the ABA signaling pathway in Arabidopsis. However, little is known about the function of their orthologs in rice, where they may hold a ...
  7. Reproductive organs regulate leaf nitrogen metabolism mediated by cytokinin signal.

    Planta 229(3):633 (2009) PMID 19048287

    The metabolism of vegetative organs in plants changes during the development of the reproductive organs. The regulation of this metabolism is important in the control of crop productivity. However, the complexity of the regulatory systems makes it difficult to elucidate their mechanisms. To exam...
  8. A novel type III polyketide synthase encoded by a three-intron gene from Polygonum cuspidatum.

    Planta 229(3):457 (2009) PMID 18998157

    A type III polyketide synthase cDNA and the corresponding gene (PcPKS2) were cloned from Polygonum cuspidatum Sieb. et Zucc. Sequencing results showed that the ORF of PcPKS2 was interrupted by three introns, which was an unexpected finding because all type III PKS genes studied so far contained ...
  9. Rapid alterations of gene expression and cytosine methylation in newly synthesized Brassica napus allopolyploids.

    Planta 229(3):471 (2009) PMID 18998158

    Allopolyploidy is an important speciation mechanism and is ubiquitous among plants. Brassica napus is a model system for studying the consequences of hybridization and polyploidization on allopolyploid genome. In this research, two sets of plant materials were used to investigate the transcripto...
  10. Role of AUX1 in the control of organ identity during in vitro organogenesis and in mediating tissue specific auxin and cytokinin interaction in Arabidopsis.

    Planta 229(3):645 (2009) PMID 19052775

    Classic plant tissue culture experiments have shown that exposure of cell culture to a high auxin to cytokinin ratio promotes root formation and a low auxin to cytokinin ratio leads to shoot regeneration. It has been widely accepted that auxin and cytokinin play an antagonistic role in the contr...
  11. Abscisic acid and hydrogen peroxide induce a novel maize group C MAP kinase gene, ZmMPK7, which is responsible for the removal of reactive oxygen species.

    Planta 229(3):485 (2009) PMID 19002491

    Mitogen-activated protein kinase (MAPK) cascades are involved in biotic and abiotic stress responses. In plants, MAPKs are classified into four groups, designated A-D. Information about group C MAPKs is limited, and, in particular, no data from maize are available. In this article, we isolated a...
  12. Functional analysis of HvSPY, a negative regulator of GA response, in barley aleurone cells and Arabidopsis.

    Planta 229(3):523 (2009) PMID 19011896

    SPINDLY (SPY) is an important regulator of plant development, and consists of an N-half tetratricopeptide repeat (TPR) domain containing 10 TPR motifs and a C-half catalytic domain, similar to O-GlcNAc transferase (OGT) of animals. The best characterised role of SPY is a negative regulator of GA...
  13. Duplication of AP1 within the Spinacia oleracea L. AP1/FUL clade is followed by rapid amino acid and regulatory evolution.

    Planta 229(3):507 (2009) PMID 19005675

    The AP1/FUL clade of MADS box genes have undergone multiple duplication events among angiosperm species. While initially identified as having floral meristem identity and floral organ identity function in Arabidopsis, the role of AP1 homologs does not appear to be universally conserved even amon...
  14. Shift in polyphenol profile and sublethal phenotype caused by silencing of anthocyanidin synthase in apple (Malus sp.).

    Planta 229(3):681 (2009) PMID 19066943

    We have investigated the consequences of blocking anthocyanin biosynthesis by silencing a key enzyme, anthocyanidin synthase, in transgenic plants of a red-leaved apple cultivar. This is complementary to a previous study of induction of anthocyanin biosynthesis by overexpressing a heterologous t...
  15. Comprehensive expression profiling analysis of OsIAA gene family in developmental processes and in response to phytohormone and stress treatments.

    Planta 229(3):577 (2009) PMID 19034497

    Auxin is one of the most important phytohormones and exerts pleiotropic effects on plant growth and development. Aux/IAA and auxin response factor (ARF) are two important protein families that are well recognized for their roles in auxin-mediated responses. Aux/IAA proteins are short-lived trans...
  16. An update on carotenoid biosynthesis in algae: phylogenetic evidence for the existence of two classes of phytoene synthase.

    Planta 229(3):723 (2009) PMID 19066941

    Carotenoids play crucial roles in structure and function of the photosynthetic apparatus of bacteria, algae, and higher plants. The entry-step reaction to carotenoid biosynthesis is catalyzed by the phytoene synthase (PSY), which is structurally and functionally related in all organisms. A compa...
  17. BREVIS RADIX is involved in cytokinin-mediated inhibition of lateral root initiation in Arabidopsis.

    Planta 229(3):593 (2009) PMID 19037657

    In contrast to auxin, relatively little is known about the molecular mechanism of cytokinin (CTK) inhibition of lateral root initiation. Previous studies demonstrated that BREVIS RADIX (BRX), a protein of unknown biochemical function, maintains a rate-limiting brassinosteroid biosynthesis enzyme...
  18. Efficient silencing of reporter transgenes coupled to known functional promoters in sugarcane, a highly polyploid crop species.

    Planta 229(3):549 (2009) PMID 19011894

    Sugarcane is a crop of great interest for engineering of sustainable biomaterials and biofuel production. Isolated sugarcane promoters have generally not maintained the expected patterns of reporter transgene expression. This could arise from defective promoters on redundant alleles in the highl...
  19. Use of silenced plants in allelopathy bioassays: a novel approach.

    Planta 229(3):569 (2009) PMID 19034496

    Volatile phytohormones or other chemicals can affect processes in distal plant parts but may also influence neighboring plants, and thereby function allelopathically. While this hypothesis has been widely discussed, rigorous tests are lacking. Transgenic plants, silenced in the production of an ...
  20. Dissection of heat-induced systemic signals: superiority of ion fluxes to voltage changes in substomatal cavities.

    Planta 229(3):539 (2009) PMID 19011895

    Using non-invasive ion-selective microprobes, that were placed in substomatal cavities, long-distance signalling has been investigated in intact Hordeum vulgare and Vicia faba seedlings. Heat (flame), applied to one leaf (S-leaf), triggers apoplastic ion activity (pH, pCa, pCl) transients in a d...