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Plant Science: An International Journal of Experimental Plant Biology

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https://www.readbyqxmd.com/read/29650162/relation-between-hypericin-content-and-morphometric-leaf-parameters-in-hypericum-spp-a-case-of-cubic-degree-polynomial-function
#1
Katarína Kimáková, Linda Petijová, Katarína Bruňáková, Eva Čellárová
Higher plants often accumulate secondary metabolites in multicellular structures or in secretory reservoirs. Biotechnological production of such compounds by cell cultures lacking proper morphological structures is difficult, therefore possibilities for an efficient increase of their formation by organ cultures are being searched. The genus Hypericum comprises many species that store photoactive and phototoxic naphthodianthrones in the dark nodules on their above-ground parts. To date, the relation between the content of hypericins and their proto-forms accumulated in the nodules, and morphological characters of the plant parts containing these structures has not been sufficiently explained...
June 2018: Plant Science: An International Journal of Experimental Plant Biology
https://www.readbyqxmd.com/read/29650161/molecular-and-functional-characterization-of-shnac1-an-nac-transcription-factor-from-solanum-habrochaites
#2
Hui Liu, Yuhong Zhou, Hanxia Li, Taotao Wang, Junhong Zhang, Bo Ouyang, Zhibiao Ye
NAC transcription factors (TFs) are important regulators of plant adaptation to abiotic stress. In this study, we functionally characterized an NAC TF, ShNAC1, from Solanum habrochaites. ShNAC1 was up-regulated by drought, cold, and salt stresses, and it displayed lower expression at the late stage of stress treatments than its orthologous gene in S. lycopersicum. Overexpression of ShNAC1 in tomato resulted in reduced cold, drought, and salt tolerance. Additionally, ShNAC1 displayed the highest expression in senescent leaf, and overexpressing ShNAC1 accelerated salt- and dark-induced leaf senescence...
June 2018: Plant Science: An International Journal of Experimental Plant Biology
https://www.readbyqxmd.com/read/29650160/manipulation-of-plant-architecture-and-%C3%AF-owering-time-by-down-regulation-of-the-gras-transcription-factor-slgras26-in-solanum-lycopersicum
#3
Shengen Zhou, Zongli Hu, Fenfen Li, Xiaohui Yu, Muhammad Naeem, Yanjie Zhang, Guoping Chen
Previous studies suggest that GRAS transcription factors act as essential regulators, not only in plant growth and development but also in response to biotic and abiotic stresses. Recently, 53 GRAS proteins have been identified, but only a few of them have been functionally studied in tomato. Here, we isolated a novel GRAS transcription factor SlGRAS26, its down-regulation generated pleiotropic phenotypes, including reduced plant height with more lateral shoots, internode length, leaf size, even leaflets, accelerated flowering transition and decreased trichome number...
June 2018: Plant Science: An International Journal of Experimental Plant Biology
https://www.readbyqxmd.com/read/29650159/expression-of-clavata3-fusions-indicates-rapid-intracellular-processing-and-a-role-of-erad
#4
Francesca De Marchis, Sara Colanero, Eva M Klein, Davide Mainieri, Viviana M Prota, Michele Bellucci, Giampiero Pagliuca, Elisa Zironi, Teresa Gazzotti, Alessandro Vitale, Andrea Pompa
The 12 amino acid peptide derived from the Arabidopsis soluble secretory protein CLAVATA3 (CLV3) acts at the cell surface in a signalling system that regulates the size of apical meristems. The subcellular pathway involved in releasing the peptide from its precursor is unknown. We show that a CLV3-GFP fusion expressed in transfected tobacco protoplasts or transgenic tobacco plants has very short intracellular half-life that cannot be extended by the secretory traffic inhibitors brefeldin A and wortmannin. The fusion is biologically active, since the incubation medium of protoplasts from CLV3-GFP-expressing tobacco contains the CLV3 peptide and inhibits root growth...
June 2018: Plant Science: An International Journal of Experimental Plant Biology
https://www.readbyqxmd.com/read/29650158/saving-for-a-rainy-day-control-of-energy-needs-in-resurrection-plants
#5
REVIEW
Pauline Asami, Sagadevan Mundree, Brett Williams
Plants constantly respond to threats in their environment by balancing their energy needs with growth, defence and survival. Some plants such as the small group of resilient angiosperms, the resurrection plants, do this better than most. Resurrection plants possess the capacity to tolerate desiccation in vegetative tissue and upon watering, regain full metabolic capacity within 72 h. Knowledge of how these plants survive such extremes has advanced in the last few decades, but the molecular mechanics remain elusive...
June 2018: Plant Science: An International Journal of Experimental Plant Biology
https://www.readbyqxmd.com/read/29650157/rna-interference-of-ghpepc2-enhanced-seed-oil-accumulation-and-salt-tolerance-in-upland-cotton
#6
Yanpeng Zhao, Yi Huang, Yumei Wang, Yupeng Cui, Zhengjie Liu, Jinping Hua
Phosphoenolpyruvate carboxylase (PEPCase) mainly produces oxaloacetic acid for tricarboxylic acid (TCA) cycle. Here we reported that GhPEPC2 silencing with PEPC2-RNAi vector could regulate oil and protein accumulation in cottonseeds. In GhPEPC2 transgenic plants, PEPCase activities in immature embryos were significantly reduced, and the oil content in seed kernel was increased 7.3 percentages, whereas total proteins decreased 5.65 percentages. Compared to wild type, agronomical traits of transgenic plant were obviously unaffected...
June 2018: Plant Science: An International Journal of Experimental Plant Biology
https://www.readbyqxmd.com/read/29650156/temperature-variation-caused-by-sowing-dates-significantly-affects-floral-initiation-and-floral-bud-differentiation-processes-in-rapeseed-brassica-napus-l
#7
Tao Luo, Jing Zhang, Mohammad Nauman Khan, Jiahuan Liu, Zhenghua Xu, Liyong Hu
To understand the influence of temperature on floral initiation and to reveal the relationship between floral bud development and yield potential of rapeseed (Brassica napus L.), early- ("1358"), intermediate- ("Zhongshuang No.11") and late- ("Zheshuang No.8") maturity genotypes were sown on different sowing dates under field conditions during four crop seasons. A multiplicative model was introduced to distinguish and quantify the effects of photoperiod and temperature on pre-floral initiation phase...
June 2018: Plant Science: An International Journal of Experimental Plant Biology
https://www.readbyqxmd.com/read/29650155/strigolactones-and-interaction-with-auxin-regulating-root-elongation-in-tall-fescue-under-different-temperature-regimes
#8
Qiannan Hu, Shuoxin Zhang, Bingru Huang
Strigolactones (SL) have recently been found to play roles in regulating root development. However, it remains unclear how SL may mediate root elongation of perennial grass species under different temperatures that differentially affect root growth. The objectives of this study were to examine effects of SL on root elongation of tall fescue and to examine the interactive effects of SL and auxin in regulating root growth under both non-stress and heat stress conditions. Tall fescue (cv. 'Kentuck-31') plants were treated with GR24 (a synthetic strigolactones), NAA (α-naphthylacetic acid), or NPA (auxin transport inhibitor N-1-naphthylphalamic acid) or their combination under non-stress control and heat stress (35/30 °C) in growth chamber...
June 2018: Plant Science: An International Journal of Experimental Plant Biology
https://www.readbyqxmd.com/read/29650154/genomic-based-multiple-trait-evaluation-in-eucalyptus-grandis-using-dominant-dart-markers
#9
Eduardo P Cappa, Yousry A El-Kassaby, Facundo Muñoz, Martín N Garcia, Pamela V Villalba, Jaroslav Klápště, Susana N Marcucci Poltri
We investigated the impact of combining the pedigree- and genomic-based relationship matrices in a multiple-trait individual-tree mixed model (a.k.a., multiple-trait combined approach) on the estimates of heritability and on the genomic correlations between growth and stem straightness in an open-pollinated Eucalyptus grandis population. Additionally, the added advantage of incorporating genomic information on the theoretical accuracies of parents and offspring breeding values was evaluated. Our results suggested that the use of the combined approach for estimating heritabilities and additive genetic correlations in multiple-trait evaluations is advantageous and including genomic information increases the expected accuracy of breeding values...
June 2018: Plant Science: An International Journal of Experimental Plant Biology
https://www.readbyqxmd.com/read/29650153/increasing-genetic-variability-in-oilseed-rape-brassica-napus-genotypes-and-phenotypes-of-oilseed-rape-transformed-by-wild-type-agrobacterium-rhizogenes
#10
Josefine Nymark Hegelund, Chang Liang, Uffe Bjerre Lauridsen, Oliver Kemp, Henrik Lütken, Renate Müller
Brassica napus (oilseed rape) is a major oil crop worldwide. Due to the short domestication period of oilseed rape the genetic variability is limited compared to other crops. Transfer of rol and aux genes from Agrobacterium rhizogenes is used in horticulture to increase genetic variability. In the current study, we explore transformation by A. rhizogenes as a biotechnological approach in breeding for more branched and shorter oilseed rape. In the 2nd generation of transformed oilseed rape, branch numbers increased significantly by 49% from 7...
June 2018: Plant Science: An International Journal of Experimental Plant Biology
https://www.readbyqxmd.com/read/29650152/the-antagonistic-basic-helix-loop-helix-partners-bee-and-ibh1-contribute-to-control-plant-tolerance-to-abiotic-stress
#11
Javier E Moreno, Guillermo Moreno-Piovano, Raquel L Chan
The bHLH family is composed by canonical and non-canonical transcription factors (TFs) that differ in the presence or absence of their DNA-binding domain, respectively. Since both types of bHLH proteins are able to dimerize, their relative abundance impacts their biological activity. Among this TF family BEE and IBH are canonical and non-canonical bHLHs, respectively and previous reports indicated that BEE2 and IBH1 dimerize. Wondering whether BEE TFs participate in the abiotic stress response and how the dimerization with IBH1 could regulate their role in Arabidopsis, double bee1/bee2 and triple bee1/bee2/bee3 mutants were tested under salinity and drought stresses...
June 2018: Plant Science: An International Journal of Experimental Plant Biology
https://www.readbyqxmd.com/read/29650151/characterization-of-l-aspartate-oxidase-from-arabidopsis-thaliana
#12
Jingfang Hao, Pierre Pétriacq, Linda de Bont, Michael Hodges, Bertrand Gakière
The flavoprotein l-aspartate oxidase (LASPO) is the first enzyme of the de novo biosynthetic pathway of NAD+ in plants. Although LASPO is considered pivotal to maintain NAD+ homeostasis, it has not been hitherto characterized in plants. Here, the cDNA encoding the LASPO from the model plant Arabidopsis thaliana (AtLASPO, At5g14760) has been cloned and expressed in Escherichia coli for subsequent enzyme characterization. The purified AtLASPO enzyme displayed a Km of 0.79 mM for l-aspartate and a kcat of 0...
June 2018: Plant Science: An International Journal of Experimental Plant Biology
https://www.readbyqxmd.com/read/29650150/the-swi-snf-subunit-swi3b-regulates-iamt1-expression-via-chromatin-remodeling-in-arabidopsis-leaf-development
#13
Wenxing Han, Danlu Han, Zhipeng He, Huan Hu, Qian Wu, Juanjuan Zhang, Jieming Jiang, Genji Qin, Yuhai Cui, Jianbin Lai, Chengwei Yang
The SWI/SNF complex is crucial to chromatin remodeling in various biological processes in different species, but the distinct functions of its components in plant development remain unclear. Here we uncovered the role of SWI3B, a subunit of the Arabidopsis thaliana SWI/SNF complex, via RNA interference. Knockdown of SWI3B resulted in an upward-curling leaf phenotype. Further investigation showed that the RNA level of IAA carboxyl methyltransferase 1 (IAMT1), encoding an enzyme involved in auxin metabolism, was dramatically elevated in the knockdown (SWI3B-RNAi) plants...
June 2018: Plant Science: An International Journal of Experimental Plant Biology
https://www.readbyqxmd.com/read/29650149/a-golden-gate-and-gateway-double-compatible-vector-system-for-high-throughput-functional-analysis-of-genes
#14
Yanjie Luo, Yang Qiu, Ren Na, Farida Meerja, Qing Shi Lu, Chunyan Yang, Lining Tian
A major research topic nowadays is to study and understand the functions of the increasing number of predicted genes that have been discovered through the complete genome sequencing of many plant species. With the aim of developing tools for rapid and convenient gene function analysis, we have developed a set of "pGate" vectors based on the principle of Golden gate and Gateway cloning approaches. These vectors combine the positive aspects of both Golden gate and Gateway cloning strategies. pGate vectors can not only be used as Golden gate recipient vectors to assemble multiple DNA fragments in a pre-defined order, but they can also work as an entry vector to transfer the assembled DNA fragment(s) to a large number of already-existing, functionally diverse, Gateway compatible destination vectors without adding additional nucleotides during cloning...
June 2018: Plant Science: An International Journal of Experimental Plant Biology
https://www.readbyqxmd.com/read/29650148/functions-and-regulation-of-phosphate-starvation-induced-secreted-acid-phosphatases-in-higher-plants
#15
REVIEW
Liangsheng Wang, Dong Liu
Phosphorus is essential for plant growth and development, but levels of inorganic phosphate (Pi), the major form of phosphorus that plants assimilate, are quite limiting in most soils. To cope with Pi deficiency, plants trigger a suite of adaptive responses, including the induction and secretion of acid phosphatases (APases). In this article, we describe how Pi starvation-induced (PSI) APases are analyzed, and we provide a brief historical review of their identification. We then discuss the current understanding of the functions of PSI-secreted APases and how these APases are regulated at the molecular level...
June 2018: Plant Science: An International Journal of Experimental Plant Biology
https://www.readbyqxmd.com/read/29650147/source-sink-relations-of-sunflower-plants-as-affected-by-a-parasite-modifies-carbon-allocations-and-leaf-traits
#16
Shahar Pincovici, Amnon Cochavi, Arnon Karnieli, Jhonathan Ephrath, Shimon Rachmilevitch
Sunflower broomrape (Orobanche cumana) is a root holoparasitic plant causing major damage to sunflower (Helianthus annuus L.). Parasite infection initiates source-sink relations between the parasite (sink) and the host (source), allocating carbohydrates, water and nutrients to the parasite. The primary aim of the current study was to explore responses of sunflower to broomrape parasitism, specifically to examine alternations in leaf area, leaf mass per area (LMA), mesophyll structure and root hydraulic conductivity...
June 2018: Plant Science: An International Journal of Experimental Plant Biology
https://www.readbyqxmd.com/read/29650146/smelling-the-metal-volatile-organic-compound-emission-under-zn-excess-in-the-mint-tetradenia-riparia
#17
Susanna Bibbiani, Ilaria Colzi, Cosimo Taiti, Werther Guidi Nissim, Alessio Papini, Stefano Mancuso, Cristina Gonnelli
This work investigated the effect of Zn excess on growth, metal accumulation and photosynthetic changes in Tetradenia riparia, in relation to possible variations in the composition of the plant volatilome. Experiments were carried out in hydroponics exposing plants to a range of Zn concentrations. Zinc excess negatively affected plant growth in a dose-dependent manner. The metal was accumulated proportionally to its concentration in the medium and preferentially allocated to roots. All the photosynthetic parameters and the concentration of some photosynthetic pigments were negatively affected by Zn, whereas the level of leaf total soluble sugars remained unchanged...
June 2018: Plant Science: An International Journal of Experimental Plant Biology
https://www.readbyqxmd.com/read/29576090/morphological-transcriptomics-and-biochemical-characterization-of-new-dwarf-mutant-of-brassica-napus
#18
Chao Wei, Lixia Zhu, Jing Wen, Bin Yi, Chaozhi Ma, Jinxing Tu, Jinxiong Shen, Tingdong Fu
Plant height is a key trait of plant architecture, and is responsible for both yield and lodging resistance in Brassica napus. A dwarf mutant line (bnaC.dwf) was obtained by chemical mutagenesis of an inbred line T6. However, the molecular mechanisms and changed biological processes of the dwarf mutant remain to be determined. In this study, a comparative transcriptome analysis between bnaC.dwf and T6 plants was performed to identify genome-wide differentially expressed genes (DEGs) and possible biological processes that may explain the phenotype variations in bnaC...
May 2018: Plant Science: An International Journal of Experimental Plant Biology
https://www.readbyqxmd.com/read/29576089/osdssr1-a-novel-small-peptide-enhances-drought-tolerance-in-transgenic-rice
#19
Yanchun Cui, Mingjuan Li, Xuming Yin, Shufeng Song, Guoyun Xu, Manling Wang, Chunyong Li, Can Peng, Xinjie Xia
Small signaling peptides play important roles in plant development and responses to abiotic and biotic stresses. We have identified a novel small peptide gene in rice, OsDSSR1, which is expressed mainly in the root, stem, node, leaf, and panicle. OsDSSR1 expression is also induced by drought, salinity, ABA, and H2 O2 treatment. OsDSSR1 is localized in the nucleus and cytoplasm. Transgenic plants overexpressing OsDSSR1 exhibited enhanced drought stress tolerance and decreased ABA sensitivity as compared to the wild type...
May 2018: Plant Science: An International Journal of Experimental Plant Biology
https://www.readbyqxmd.com/read/29576088/review-potential-biotechnological-assets-related-to-plant-immunity-modulation-applicable-in-engineering-disease-resistant-crops
#20
REVIEW
Marilia Santos Silva, Fabrício Barbosa Monteiro Arraes, Magnólia de Araújo Campos, Maira Grossi-de-Sa, Diana Fernandez, Elizabete de Souza Cândido, Marlon Henrique Cardoso, Octávio Luiz Franco, Maria Fátima Grossi-de-Sa
This review emphasizes the biotechnological potential of molecules implicated in the different layers of plant immunity, including, pathogen-associated molecular pattern (PAMP)-triggered immunity (PTI), effector-triggered susceptibility (ETS), and effector-triggered immunity (ETI) that can be applied in the development of disease-resistant genetically modified (GM) plants. These biomolecules are produced by pathogens (viruses, bacteria, fungi, oomycetes) or plants during their mutual interactions. Biomolecules involved in the first layers of plant immunity, PTI and ETS, include inhibitors of pathogen cell-wall-degrading enzymes (CWDEs), plant pattern recognition receptors (PRRs) and susceptibility (S) proteins, while the ETI-related biomolecules include plant resistance (R) proteins...
May 2018: Plant Science: An International Journal of Experimental Plant Biology
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