检索结果-南通市图书馆

Regulation of Stamen Development by Coordinated Actions of Jasmonate, auxin. and Gibberellin in Arabidopsis

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

Molecular Plant 2013年第4期6卷 1065-1073页

作者： Susheng Song Tiancong Qi Huang Huang Daoxin Xie Tsinghua-Peking Center for Life Sciences MOE Key Laboratory of Bioinformatics School of Life Sciences Tsinghua University Beijing 100084 China

Proper stamen development is essential for plants to achieve their life cycles. Defects in stamen development will cause male sterility. A vast array of research efforts have been made to understand stamen developmental processes and reg- ulatory mechanisms over the past decades. It is so far reported that phytohormones, including jasmonate, auxin. gibberellin, brassinosteroid, and cytokinin, play essential roles in regulation of stamen development. This review will briefly summarize the molecular basis for coordinated regulation of stamen development by jasmonate, auxin. and gibberellin in Arabidopsis.

关键词： stamen jasmonate gibberellin auxin.

Meta-Analysis of Retrograde Signaling in Arabidopsis thaliana Reveals a Core Module of Genes Embedded in Complex Cellular Signaling Networks

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Molecular Plant 2014年第7期7卷 1167-1190页

作者： Christine GlaiBer Georg Haberer Iris Finkemeier Thomas Pfannschmidt Tatjana Kleine Dario Leister KarI-Josef Dietz Rainer Erich Haiusler Bernhard Grimm Klaus Franz Xaver Mayer Helmholtz Zentrum Munchen German Research Center for Environmental Health Institute of Bioinformatics and Systems Biology(IBIS) Ingolstadter Landstr. 1 D-85764 Neuherberg Germany Biozentrum der LMU Munchen Department of Biologie I-Botanik Groβhaderner Str. 2-4 D-82152 Planegg-Martinsried Germany Friedrich-Schiller-Universitat Jena Institut fur AIIgemeine Botanik und Pflanzenphysiologie Dornburger Str. 159 D-07743 JenaGermany Laboratoire de Physiologie Cellulaire Vegetale (LPCV) CEA/CNRS/UJF iRTSV CEA Grenoble 17 rue des Martyrs 38054 Grenoble cedex 9France Biochemistry and Physiology of Plants Faculty of Biology Bielefeld University Universit~tsstrai3e 25 D-33615 Bielefeld Germany University of Cologne Botanical Institute Cologne Biocenter Zu1picher Str. 47B D-50674 Cologne Germany Humboldt-Universitat zu Berlin Institut fur Biologie AG Pflanzenphysiologie Philippstrasse 13 D-10115 Berlin Germany

Plastid-to-nucleus signaling is essential for the coordination and adjustment of cellular metabolism in response to environmental and developmental cues of plant cells. A variety of operational retrograde signaling path- ways have been described that are thought to be triggered by reactive oxygen species, photosynthesis redox imbalance, tetrapyrrole intermediates, and other metabolic traits. Here we report a meta-analysis based on transcriptome and pro- tein interaction data. Comparing the output of these pathways reveals the commonalities and peculiarities stimulated by six different sources impinging on operational retrograde signaling. Our study provides novel insights into the interplay of these pathways, supporting the existence of an as-yet unknown core response module of genes being regulated under all conditions tested. Our analysis further highlights affiliated regulatory cis-elements and classifies abscisic acid and auxin.based signaling as secondary components involved in the response cascades following a plastidial signal. Our study provides a global analysis of structure and interfaces of different pathways involved in plastid-to-nucleus signaling and a new view on this complex cellular communication network.

关键词： retrograde signaling meta-analysis abscisic acid auxin.

NPY Genes Play an Essential Role in Root Gravitropic Responses in Arabidopsis

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Molecular Plant 2011年第1期4卷 171-179页

作者： Yuanting Li Xinhua Dai Youfa Cheng Yunde Zhao Section of Cell and Developmental Biology University of California San Diego 9500 Gilman Drive La Jolla CA92093-0116 USA Key Laboratory of Arid and Grassland Agroecology of Ministry of Education School of Life Sciences Lanzhou University Lanzhou 730000 China Present address: Key Laboratory of Photosynthesis and Environmental Molecular Physiology Institute of Botany Chinese Academy of Sciences Beijing 100093 China

Plants can sense the direction of gravity and orient their growth to ensure that roots are anchored in soil and that shoots grow upward. Gravitropism has been studied extensively using Arabidopsis genetics, but the exact mecha- nisms for gravitropism are not fully understood. Here, we demonstrate that five NPY genes play a key role in Arabidopsis root gravitropism. NPYgenes were previously identified as regulators of auxin.mediated organogenesis in a genetic pathway with the AGC kinases PID, PID2, WAG1, and WAG2. We show that all five NPYgenes are highly expressed in primary root tips. The single npy mutants do not display obvious gravitropism defects, but the npyl npy2 npy3 npy4 npy5 quin- tuple mutants show dramatic gravitropic phenotypes. Systematic analysis of all the npy double, triple, and quadruple combinations demonstrates that the five NPY genes all contribute to gravitropism. Our work indicates that gravitropism, phototropism, and organogenesis use analogous mechanisms in which at least one AGC kinase, one NPH3/NPY gene, and one ARF are required.

关键词： Light signaling signal transduction development root biology auxin.

Role of Arabidopsis UV RESISTANCE LOCUS 8 in Plant Growth Reduction under Osmotic Stress and Low Levels of UV-B

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Molecular Plant 2014年第5期7卷 773-791页

作者： Rossella Fasano Nathalie Gonzalez Alessandra Tosco Fabrizio Dal Piaz Teresa Docimo Ramon Serrano Stefania Grillo Antonella Leone Dirk Inze Department of Pharmacy University of Salerno Fisciano Italy Department of Plant Systems Biology VIB 9052 Ghent Belgium Department of Plant Biotechnology and Bioinformatics Ghent University 9052 Gent Belgium Max Planck Institute for Chemical Ecology Jena Germany Instituto de Biologia Molecular y Celular de Plantas Universidad Politecnica de Valencia CSIC Valencia Spain National Research Council of Italy Institute of Plant Genetics Res. Div. Portici Portici Italy

In high-light environments, plants are exposed to different types of stresses, such as an excess of UV-B, but also drought stress which triggers a common morphogenic adaptive response resulting in a general reduction of plant growth. Here, we report that the Arabidopsis thaliana UVRESISTANCE LOCUS 8 （UVR8） gene, a known regulator of the UV-B morphogenic response, was able to complement a Saccharomyces cerevisiae osmo-sensitive mutant and its expression was induced after osmotic or salt stress in Arabidopsis plants. Under low levels of UV-B, plants overexpressing UVR8 are dwarfed with a reduced root development and accumulate more flavonoids compared to control plants. The growth defects are mainly due to the inhibition of cell expansion. The growth inhibition triggered by UVR8 overexpression in plants under low levels of UV-B was exacerbated by mannitol-induced osmotic stress, but it was not significantly affected by ionic stress. In contrast, uvr8-6 mutant plants do not differ from wild-type plants under standard conditions, but they show an increased shoot growth under high-salt stress. Our data suggest that UVR8-mediated accumulation of flavonoid and possibly changes in auxin.homeostasis are the underlying mechanism of the observed growth phenotypes and that UVR8 might have an important role for integrating plant growth and stress signals.

关键词： osmotic stress growth reduction cell expansion flavonoid auxin.

auxin.Biosynthesis： A Simple Two-Step Pathway Converts Tryptophan to Indole-3-Acetic Acid in Plants

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Molecular Plant 2012年第2期5卷 334-338页

作者： Yunde Zhao Section of Cell and Developmental Biology University of California San Diego 9500 Gilman Drive La Jolla CA 92093-0116 USA

Indole-3-acetic acid （IAA）, the main naturally occurring auxin. is essential for almost every aspect of plant growth and development. However, only recently have studies finally established the first complete auxin.biosynthesis pathway that converts tryptophan （Trp） to IAA in plants. Trp is first converted to indole-3-pyruvate （IPA） by the TAA family of amino transferases and subsequently IAA is produced from IPA by the YUC family of flavin monooxygenases. The two- step conversion of Trp to IAA is the main auxin.biosynthesis pathway that plays an essential role in many developmental processes.

关键词： hormonal regulation hormone biology genetics development auxin.

Characterization of Pro-embryogenic Calli and Somatic Embryogenesis of Byrsonima intermedia A. Juss.

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Journal of Agricultural Science and Technology(A) 2012年第8期2卷 962-970页

作者： Luciano Coutinho Silva Renato Paiva Diogo Pedrosa Correa Da Silva Sandro Barbosa Rairys CravoHerrera Lisete Chamma Davide Patricia Duarte De Oliveira Paiva Agronomy Plant Physiology Biology Department Federal University of Lavras (UFLA) Lavras Minas Gerais Brasil . Department of Biology and Erath Science Federal University of Alfenas (UNIFAL) MG Alfenas MG Brasil Laboratory of Plant Physiology Federal University of Par6 Altamira PA Brasil

Byrsonima intermedia A. Juss. is a species from the Brazilian Cerrado that produces edible fruits and, in common with other species from the Byrsonima genus, has pharmacological potential. Previous attempts to propagate the species through conventional methods showed difficulties. Thus, the purpose of this work was to characterize pro-embryogenic masses of Byrsonima intermedia callus, aiming for their in vitro propagation through somatic embryogenesis. Leaf segments from in vitro germinated seedlings were employed as explants for callus production. The calli were then subcultured and exposed to dyes to fulfill their embryogenic potential. Digitalizations of the cytological preparations were made in order to measure the area that was stained by both Aceto-Carmine and Evans-Blue, using image tool software. Somatic embryos were induced after treatments with l-naphthaleneacetic acid （NAA）. The percentages of double-colored areas （by Aceto-Carmine and Evans-Blue） were calculated and the data were analyzed by using the Skott-Knott test （P ≤ 0.05） and, the embryogenic callus, as well as the formation of somatic embryos were analyzed by using the Krsuskal-Wallis rank test （P ≤0.05）. The results show that double coloration is effective at identifying cells showing embryogenic potential. Early callus subculture phases show a larger percentage ofembryogenic area （83%） Somatic embryos were induced by using high auxin.level.

关键词： Double staining aceto-carmine evans-blue somatic embryogenesis native plant auxin.

Effect of Paclobutrazol and auxin.on Growth Plantlet of Garlic Varieties in in Vitro Culture

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Journal of Agricultural Science and Technology(A) 2014年第9期4卷 762-766页

作者： Eddy Triharyanto Sri Budiastuti Djoko Pumomo Departement of Agrotechnology Agriculture Faculty Sebelas Maret University Surakarta 57125 Indonesia Departement of Agricultural Sciences Postgraduate Program Sebelas Maret University Surakarta 57125 Indonesia

Area of cultivating garlic in Indonesia experienced a sharp decline. In a period of 20 years （1991-2011）, the decline of garlic planting area reaches 91%. The fact is causing erosion of genetic resources of several varieties of garlic. Propagated vegetatively garlic through in vitro culture aims to obtain quality bulblet. This study aims to get the combination treatment between paclobutrazol, indole acetic acid （IAA）, indole butyric acid （IBA） and naphthalene acetic acid （NAA） in some varieties of garlic in Indonesia. This study used a completely randomized design （CRD） with two treatment factors, i.e., on varieties （Bali, Gunung Kidul, Slawi, Tawangmangu and Mataram） and 1.5 ppm paclobutrazol combination with a wide auxin.（IAA 0.5 ppm, 0.5 ppm IBA, NAA 0.5 ppm）. Variable observations include the current appear shoots and roots, number of shoots and roots, shoots and root length. Observations showed that the combination of paclobutrazol ＋ NAA is able to produce plantlets that have the best vigor than paclohutrazol ＋ IAA and paclobutrazol ＋ IBA combination treatment.

关键词： Garlic in vitro paclobutrazol auxin.