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https://www.readbyqxmd.com/read/28209181/de-novo-sequencing-and-comparative-transcriptome-analysis-of-adventitious-root-development-induced-by-exogenous-indole-3-butyric-acid-in-cuttings-of-tetraploid-black-locust
#1
Jine Quan, Seng Meng, Erhui Guo, Sheng Zhang, Zhong Zhao, Xitian Yang
BACKGROUND: Indole-3-butyric acid (IBA) is applied to the cuttings of various plant species to induce formation of adventitious roots (ARs) in commercial settings. Tetraploid black locust is an attractive ornamental tree that is drought resistant, sand tolerant, can prevent sand erosion and has various commercial uses. To further elucidate the mechanisms of AR formation, we used Illumina sequencing to analyze transcriptome dynamics and differential gene expression at four developmental stages in control (CK) and IBA-treated groups...
February 16, 2017: BMC Genomics
https://www.readbyqxmd.com/read/28207183/combining-the-auxin-inducible-degradation-system-with-crispr-cas9-based-genome-editing-for-the-conditional-depletion-of-endogenous-drosophila-melanogaster-proteins
#2
Melinda Bence, Ferenc Jankovics, Tamás Lukácsovich, Miklós Erdélyi
Inducible protein degradation techniques have considerable advantages over classical genetic approaches, which generate loss-of-function phenotypes at the gene or mRNA level. The plant-derived auxin-inducible degradation system (AID) is a promising technique which enables the degradation of target proteins tagged with the AID motif in non-plant cells. Here, we present a detailed characterization of this method employed during the adult oogenesis of Drosophila. Furthermore, with the help of CRISPR/Cas9-based genome editing, we improve the utility of the AID system in the conditional elimination of endogenously expressed proteins...
February 16, 2017: FEBS Journal
https://www.readbyqxmd.com/read/28206613/biochemical-and-chemical-biology-study-of-rice-ostar1-revealed-that-tryptophan-aminotransferase-is-involved-in-auxin-biosynthesis-identification-of-a-potent-ostar1-inhibitor-pyruvamine2031
#3
Yusuke Kakei, Ayako Nakamura, Mitsuhiro Yamamoto, Yosuke Ishida, Chiaki Yamazaki, Akiko Sato, Megumi Narukawa-Nara, Kazuo Soeno, Yukihisa Shimada
No abstract text is available yet for this article.
January 30, 2017: Plant & Cell Physiology
https://www.readbyqxmd.com/read/28199662/the-arabidopsis-polyamine-oxidase-dehydrogenase-5-interferes-with-cytokinin-and-auxin-signaling-pathways-to-control-xylem-differentiation
#4
Osama Alabdallah, Abdellah Ahou, Namrata Mancuso, Valerio Pompili, Alberto Macone, Dimitre Pashkoulov, Pasquale Stano, Alessandra Cona, Riccardo Angelini, Paraskevi Tavladoraki
No abstract text is available yet for this article.
February 8, 2017: Journal of Experimental Botany
https://www.readbyqxmd.com/read/28198417/chilling-affects-phytohormone-and-post-embryonic-development-pathways-during-bud-break-and-fruit-set-in-apple-malus-domestica-borkh
#5
Gulshan Kumar, Khushboo Gupta, Shivalika Pathania, Mohit Kumar Swarnkar, Usha Kumari Rattan, Gagandeep Singh, Ram Kumar Sharma, Anil Kumar Singh
The availability of sufficient chilling during bud dormancy plays an important role in the subsequent yield and quality of apple fruit, whereas, insufficient chilling availability negatively impacts the apple production. The transcriptome profiling during bud dormancy release and initial fruit set under low and high chill conditions was performed using RNA-seq. The comparative high number of differentially expressed genes during bud break and fruit set under high chill condition indicates that chilling availability was associated with transcriptional reorganization...
February 15, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28197916/regulation-of-plant-cellular-and-organismal-development-by-sumo
#6
Nabil Elrouby
This chapter clearly demonstrates the breadth and spectrum of the processes that SUMO regulates during plant development. The gross phenotypes observed in mutants of the SUMO conjugation and deconjugation enzymes reflect these essential roles, and detailed analyses of these mutants under different growth conditions revealed roles in biotic and abiotic stress responses, phosphate starvation, nitrate and sulphur metabolism, freezing and drought tolerance and response to excess copper. SUMO functions also intersect with those regulated by several hormones such as salicylic acid , abscisic acid , gibberellins and auxin, and detailed studies provide mechanistic clues of how sumoylation may regulate these processes...
2017: Advances in Experimental Medicine and Biology
https://www.readbyqxmd.com/read/28197647/the-overproduction-of-indole-3-acetic-acid-iaa-in-endophytes-upregulates-nitrogen-fixation-in-both-bacterial-cultures-and-inoculated-rice-plants
#7
Roberto Defez, Anna Andreozzi, Carmen Bianco
Endophytic bacteria from roots and leaves of rice plants were isolated and identified in order to select the diazotrophs and improve their nitrogen-fixing abilities. The nitrogen-fixing endophytes were identified by PCR amplification of the nifH gene fragment. For this purpose, two isolates, Enterobacter cloacae RCA25 and Klebsiella variicola RCA26, and two model bacteria (Herbaspirillum seropedicae z67 and Sinorhizobium fredii NGR234) were transformed to increase the biosynthesis of the main plant auxin indole-3-acetic acid (IAA)...
February 14, 2017: Microbial Ecology
https://www.readbyqxmd.com/read/28197159/an-rna-seq-analysis-of-grape-plantlets-grown-in-vitro-reveals-different-responses-to-blue-green-red-led-light-and-white-fluorescent-light
#8
Chun-Xia Li, Zhi-Gang Xu, Rui-Qi Dong, Sheng-Xin Chang, Lian-Zhen Wang, Muhammad Khalil-Ur-Rehman, Jian-Min Tao
Using an RNA sequencing (RNA-seq) approach, we analyzed the differentially expressed genes (DEGs) and physiological behaviors of "Manicure Finger" grape plantlets grown in vitro under white, blue, green, and red light. A total of 670, 1601, and 746 DEGs were identified in plants exposed to blue, green, and red light, respectively, compared to the control (white light). By comparing the gene expression patterns with the growth and physiological responses of the grape plantlets, we were able to link the responses of the plants to light of different spectral wavelengths and the expression of particular sets of genes...
2017: Frontiers in Plant Science
https://www.readbyqxmd.com/read/28196801/auxin-2016-a-burst-of-auxin-in-the-warm-south-of-china
#9
REVIEW
Teva Vernoux, Stéphanie Robert
The luxurious vegetation at Sanya, the most southern location in China on the island of Hainan, provided a perfect environment for the 'Auxin 2016' meeting in October. As we review here, participants from all around the world discussed the latest advances in auxin transport, metabolism and signaling pathways, highlighting how auxin acts during plant development and in response to the environment in combination with other hormones. The meeting also provided a rich perspective on the evolution of the role of auxin, from algae to higher plants...
February 15, 2017: Development
https://www.readbyqxmd.com/read/28195159/sirtinol-a-sir2-protein-inhibitor-affects-stem-cell-maintenance-and-root-development-in-arabidopsis-thaliana-by-modulating-auxin-cytokinin-signaling-components
#10
Sharmila Singh, Alka Singh, Sandeep Yadav, Vibhav Gautam, Archita Singh, Ananda K Sarkar
In Arabidopsis thaliana, besides several key transcription factors and chromatin modifiers, phytohormones auxin and cytokinin play pivotal role in shoot and root meristem maintenance, and lateral root (LR) development. Sirtinol, a chemical inhibitor of Sir2 proteins, is known to promote some auxin induced phenotypes in Arabidopsis. However, its effect on plant stem cell maintenance or organ formation remained unaddressed. Here we show that sirtinol affects meristem maintenance by altering the expression of key stem cell regulators, cell division and differentiation by modulating both auxin and cytokinin signaling in Arabidopsis thaliana...
February 14, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28194564/xylogenesis-in-zinnia-zinnia-elegans-cell-cultures-unravelling%C3%A2-the-regulatory-steps-in-a-complex-developmental-programmed-cell-death-event
#11
REVIEW
Elena T Iakimova, Ernst J Woltering
Physiological and molecular studies support the view that xylogenesis can largely be determined as a specific form of vacuolar programmed cell death (PCD). The studies in xylogenic zinnia cell culture have led to many breakthroughs in xylogenesis research and provided a background for investigations in other experimental models in vitro and in planta . This review discusses the most essential earlier and recent findings on the regulation of xylem elements differentiation and PCD in zinnia and other xylogenic systems...
February 13, 2017: Planta
https://www.readbyqxmd.com/read/28193764/shoot-removal-induces-chloroplast-development-in-roots-via-cytokinin-signaling
#12
Koichi Kobayashi, Ai Ohnishi, Daichi Sasaki, Sho Fujii, Akira Iwase, Keiko Sugimoto, Tatsuru Masuda, Hajime Wada
Development of plant chloroplasts is regulated by various developmental, environmental, and hormonal cues. In Arabidopsis thaliana, chloroplast development is repressed in roots via auxin signaling. However, roots develop chloroplasts when they are detached from the shoot. In contrast to auxin, cytokinin positively affects chloroplast development in roots, but the role and signaling pathway of cytokinin in the root greening response remain unclear. To understand the regulatory pathways of chloroplast development in the plant stress response, we examined the mechanisms underlying the conditional greening of detached roots...
February 13, 2017: Plant Physiology
https://www.readbyqxmd.com/read/28188422/regulation-of-seedling-growth-by-ethylene-and-the-ethylene-auxin-crosstalk
#13
REVIEW
Yuming Hu, Filip Vandenbussche, Dominique Van Der Straeten
This review highlights that the auxin gradient, established by local auxin biosynthesis and transport, can be controlled by ethylene, and steers seedling growth. A better understanding of the mechanisms in Arabidopsis will increase potential applications in crop species. In dark-grown Arabidopsis seedlings, exogenous ethylene treatment triggers an exaggeration of the apical hook, the inhibition of both hypocotyl and root elongation, and radial swelling of the hypocotyl. These features are predominantly based on the differential cell elongation in different cells/tissues mediated by an auxin gradient...
February 10, 2017: Planta
https://www.readbyqxmd.com/read/28187161/modeling-hormonal-control-of-cambium-proliferation
#14
Vladyslav Oles, Alexander Panchenko, Andrei Smertenko
Rise of atmospheric CO2 is one of the main causes of global warming. Catastrophic climate change can be avoided by reducing emissions and increasing sequestration of CO2. Trees are known to sequester CO2 during photosynthesis, and then store it as wood biomass. Thus, breeding of trees with higher wood yield would mitigate global warming as well as augment production of renewable construction materials, energy, and industrial feedstock. Wood is made of cellulose-rich xylem cells produced through proliferation of a specialized stem cell niche called cambium...
2017: PloS One
https://www.readbyqxmd.com/read/28184233/overexpression-of-the-novel-arabidopsis-gene-at5g02890-alters-inflorescence-stem-wax-composition-and-affects-phytohormone-homeostasis
#15
Liping Xu, Viktoria Zeisler, Lukas Schreiber, Jie Gao, Kaining Hu, Jing Wen, Bin Yi, Jinxiong Shen, Chaozhi Ma, Jinxing Tu, Tingdong Fu
The cuticle is composed of cutin and cuticular wax. It covers the surfaces of land plants and protects them against environmental damage. At5g02890 encodes a novel protein in Arabidopsis thaliana. In the current study, protein sequence analysis showed that At5g02890 is highly conserved in the Brassicaceae. Arabidopsis lines overexpressing At5g02890 (OE-At5g02890 lines) and an At5g02890 orthologous gene from Brassica napus (OE-Bn1 lines) exhibited glossy stems. Chemical analysis revealed that overexpression of At5g02890 caused significant reductions in the levels of wax components longer than 28 carbons (C28) in inflorescence stems, whereas the levels of wax molecules of chain length C28 or shorter were significantly increased...
2017: Frontiers in Plant Science
https://www.readbyqxmd.com/read/28183154/photomorphogenic-responses-to-ultraviolet-b-light
#16
REVIEW
Gareth I Jenkins
Exposure to UV-B light regulates numerous aspects of plant metabolism, morphology and physiology through the differential expression of hundreds of genes. Photomorphogenic responses to UV-B are mediated by the photoreceptor UV RESISTANCE LOCUS8 (UVR8). Considerable progress has been made in understanding UVR8 action: the structural basis of photoreceptor function, how interaction with CONSTITUTIVELY PHOTOMORPHOGENIC 1 (COP1) initiates signaling and how REPRESSOR OF UV-B PHOTOMORPHOGENESIS (RUP) proteins negatively regulate UVR8 action...
February 9, 2017: Plant, Cell & Environment
https://www.readbyqxmd.com/read/28182949/catalase2-coordinates-sa-mediated-repression-of-both-auxin-accumulation-and-ja-biosynthesis-in-plant-defenses
#17
Hong-Mei Yuan, Wen-Cheng Liu, Ying-Tang Lu
Plants defend against pathogen attack by modulating auxin signaling and activating the salicylic acid (SA) and jasmonic acid (JA) signaling pathways. SA and JA act antagonistically in resistance to specific pathogen types, yet how plants coordinate these phytohormones remains elusive. Here we report that biotrophic-pathogen-induced SA accumulation dampens both auxin and JA synthesis by inhibiting CATALASE2 (CAT2) activity in the model plant Arabidopsis. SA suppression of CAT2 results in increased H2O2 levels and subsequent sulfenylation of tryptophan synthetase β subunit 1, thus depleting the auxin biosynthetic precursor tryptophan...
February 8, 2017: Cell Host & Microbe
https://www.readbyqxmd.com/read/28182944/the-cat-2-comes-back
#18
Musoki Mwimba, Xinnian Dong
Genetic and biochemical evidence supporting CATALASE2 as a salicylic acid (SA) receptor has finally emerged. In this issue of Cell Host & Microbe, Yuan et al. (2017) show that SA binds to CATALASE2 to inhibit auxin and jasmonic acid biosynthetic enzymes as a means to strengthen plant immunity against biotrophic pathogens.
February 8, 2017: Cell Host & Microbe
https://www.readbyqxmd.com/read/28180138/er-microsome-preparation-and-subsequent-iaa-quantification-in-maize-coleoptile-and-primary-root-tissue
#19
Verena Kriechbaumer
Auxin is a major growth hormone in plants and the first plant hormone to be discovered and studied (Darwin and Darwin, 1880). The auxin molecule in plants was first identified as indole-3-acetic acid (IAA) by Kögl et al. (1934). Active research over nearly a decade has shed light on many of the molecular mechanisms of its action but the complexity and redundancy of the auxin biosynthetic network raises questions about control of this system. We have shown that some enzymes involved in the YUCCA-route of auxin biosynthesis are not cytosolic but localised to the endoplasmic reticulum (ER) in both Arabidopsis thaliana (YUCCA4...
May 5, 2016: Bio-protocol
https://www.readbyqxmd.com/read/28177844/genome-wide-analysis-and-expression-characteristics-of-small-auxin-up-rna-saur-genes-in-moso-bamboo-phyllostachys-edulis
#20
Qingsong Bai, Dan Hou, Long Li, Zhanchao Cheng, Wei Ge, Jun Liu, Xueping Li, Shaohua Mu, Jian Gao
Moso bamboo (Phyllostachys edulis) is well-known for its rapid shoot growth. Auxin exerts pleiotropic effects on plant growth. The small auxin-up RNA (SAUR) genes are early auxin-responsive genes involved in plant growth. In total, 38 SAUR genes were identified in P. edulis (PheSAUR). A comprehensive overview of the PheSAUR gene family is presented, including the gene structures, phylogeny and subcellular location predictions. A transcriptome analysis indicated that 37 (except PheSAUR18) of the PheSAUR genes were expressed during shoot growth process and the PheSAUR genes were differentially expressed...
November 15, 2016: Genome Génome / Conseil National de Recherches Canada
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