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https://www.readbyqxmd.com/read/28544196/analysis-of-transcriptional-and-epigenetic-changes-in-hybrid-vigor-of-allopolyploid-brassica-napus-uncovers-key-roles-for-small-rnas
#1
Yifei Shen, Shuo Sun, Shuijin Hua, Enhui Shen, Chu-Yu Ye, Daguang Cai, Michael P Timko, Qian-Hao Zhu, Longjiang Fan
Heterosis is a fundamental biological phenomenon characterized by the superior performance of a hybrid compared to its parents. The underlying molecular basis for heterosis, particularly for allopolyploids, remains elusive. In this study, we analyzed the transcriptomes of Brassica napus parental lines and their F1 hybrids at three stages of early flower development. Phenotypically, the F1 hybrids show remarkable heterosis in silique number and grain yield. Transcriptome analysis revealed that various phytohormones (auxin and salicylic acid) response genes are significantly altered in the F1 hybrids relative to the parental lines...
May 21, 2017: Plant Journal: for Cell and Molecular Biology
https://www.readbyqxmd.com/read/28542545/a-first-insight-into-the-involvement-of-phytohormones-pathways-in-coffee-resistance-and-susceptibility-to-colletotrichum-kahawae
#2
Inês Diniz, Andreia Figueiredo, Andreia Loureiro, Dora Batista, Helena Azinheira, Vítor Várzea, Ana Paula Pereira, Elijah Gichuru, Pilar Moncada, Leonor Guerra-Guimarães, Helena Oliveira, Maria do Céu Silva
Understanding the molecular mechanisms underlying coffee-pathogen interactions are of key importance to aid disease resistance breeding efforts. In this work the expression of genes involved in salicylic acid (SA), jasmonic acid (JA) and ethylene (ET) pathways were studied in hypocotyls of two coffee varieties challenged with the hemibiotrophic fungus Colletotrichum kahawae, the causal agent of Coffee Berry Disease. Based on a cytological analysis, key time-points of the infection process were selected and qPCR was used to evaluate the expression of phytohormones biosynthesis, reception and responsive-related genes...
2017: PloS One
https://www.readbyqxmd.com/read/28541504/e3-ubiquitin-ligases-ubiquitous-actors-in-plant-development-and-abiotic-stress-responses
#3
Kai Shu, Wenyu Yang
Understanding the precise regulatory mechanisms of plant development and stress responses at the post-translational level is currently a topic of intensive research. Protein ubiquitination, including the sequential performances of ubiquitin-activating (E1), ubiquitin-conjugating (E2) and ubiquitin ligase (E3) enzymes, is a refined post-translational modification ubiquitous in all eukaryotes. Plants are an integral part of our ecosystem and, as sessile organisms, the ability to perceive internal and external signals and to adapt well to various environmental challenges is crucial for their survival...
May 25, 2017: Plant & Cell Physiology
https://www.readbyqxmd.com/read/28537535/ethephon-increases-photosynthetic-nitrogen-use-efficiency-proline-and-antioxidant-metabolism-to-alleviate-decrease-in-photosynthesis-under-salinity-stress-in-mustard
#4
Noushina Iqbal, Shahid Umar, Tasir S Per, Nafees A Khan
Salinity is a serious threat to plant growth and development worldwide reducing agricultural productivity each year. Ethylene is an important phytohormone that affects plants performance under normal and abiotic stress conditions. In this study, role of ethylene was investigated in mitigating salinity stress (100 mM NaCl) effects on photosynthesis in mustard plants subjected to different nitrogen (N; 5 and 10 mM) levels. Plants under salinity stress exhibited marked increase in proline and reduced glutathione (GSH) content and activity of antioxidant enzymes...
May 24, 2017: Plant Signaling & Behavior
https://www.readbyqxmd.com/read/28534718/jasmonate-suppresses-seedling-soil-emergence-in-arabidopsis-thaliana
#5
Lulu Yao, Yuyu Zheng, Ziqiang Zhu
In addition to defense response, phytohormone jasmonate participates in various plant growth and developmental processes. Nonetheless, its role in the seedling stage is not well defined. We recently report that jasmonate suppresses hypocotyl elongation and promotes cotyledon unfolding in etiolated Arabidopsis seedlings. The molecular basis underlying this phenotype is that jasmonate treatment reduces the biochemical activity of CONSTITUTIVE PHOTOMORPHOGENIC 1 (COP1) to stabilize several COP1-targetted transcription factors for eliciting a proportion of light responsive transcriptome...
May 23, 2017: Plant Signaling & Behavior
https://www.readbyqxmd.com/read/28533212/primitive-auxin-response-without-tir1-and-aux-iaa-in-the-charophyte-alga-klebsormidium-nitens
#6
Kinuka Ohtaka, Koichi Hori, Yuri Kanno, Mitsunori Seo, Hiroyuki Ohta
The phytohormone auxin regulates many aspects of growth and development in land plants, but the origin and evolution of auxin signaling and response mechanisms remain largely unknown. Indeed, it remains to be investigated whether auxin-related pathways diverged before the emergence of land plants. To address this knowledge deficit, we analyzed auxin responses in the charophyte alga Klebsormidium nitens NIES-2285, whose ancestor diverged from a green algal ancestor during the evolution of land plants. This strain is the same as K...
May 22, 2017: Plant Physiology
https://www.readbyqxmd.com/read/28529517/role-of-silicon-on-plant-pathogen-interactions
#7
REVIEW
Min Wang, Limin Gao, Suyue Dong, Yuming Sun, Qirong Shen, Shiwei Guo
Although silicon (Si) is not recognized as an essential element for general higher plants, it has beneficial effects on the growth and production of a wide range of plant species. Si is known to effectively mitigate various environmental stresses and enhance plant resistance against both fungal and bacterial pathogens. In this review, the effects of Si on plant-pathogen interactions are analyzed, mainly on physical, biochemical, and molecular aspects. In most cases, the Si-induced biochemical/molecular resistance during plant-pathogen interactions were dominated as joint resistance, involving activating defense-related enzymes activates, stimulating antimicrobial compound production, regulating the complex network of signal pathways, and activating of the expression of defense-related genes...
2017: Frontiers in Plant Science
https://www.readbyqxmd.com/read/28520800/transcriptome-profiling-revealed-novel-transcriptional-regulators-in-maize-responses-to-ostrinia-furnacalis-and-jasmonic-acid
#8
Hai Wang, Shengyan Li, Shouzhen Teng, Haisheng Liang, Hongjia Xin, Hongjiang Gao, Dafang Huang, Zhihong Lang
Chewing insects cause severe yield losses in crop production worldwide. Crop plants counteract chewing insects by transcriptionally promoting a repertoire of defense gene products that are either toxic to, or attractive to the natural enemies of, pest insects. However, the complexity of the transcriptional reprogramming in plant defense response against chewing insects is still not well understood. In this study, the genome-wide early responses in maize seedlings to Asian corn borer (ACB, Ostrinia furnacalis) and also to jasmonic acid(JA), the pivotal phytohormone controlling plant defense response against herbivory, were transcriptionally profiled by RNA-Seq...
2017: PloS One
https://www.readbyqxmd.com/read/28512462/de-novo-transcriptome-profiling-of-flowers-flower-pedicels-and-pods-of-lupinus-luteus-yellow-lupine-reveals-complex-expression-changes-during-organ-abscission
#9
Paulina Glazinska, Waldemar Wojciechowski, Milena Kulasek, Wojciech Glinkowski, Katarzyna Marciniak, Natalia Klajn, Jacek Kesy, Jan Kopcewicz
Yellow lupine (Lupinus luteus L., Taper c.), a member of the legume family (Fabaceae L.), has an enormous practical importance. Its excessive flower and pod abscission represents an economic drawback, as proper flower and seed formation and development is crucial for the plant's productivity. Generative organ detachment takes place at the basis of the pedicels, within a specialized group of cells collectively known as the abscission zone (AZ). During plant growth these cells become competent to respond to specific signals that trigger separation and lead to the abolition of cell wall adhesion...
2017: Frontiers in Plant Science
https://www.readbyqxmd.com/read/28510189/multiple-regulatory-roles-of-ap2-erf-transcription-factor-in-angiosperm
#10
REVIEW
Chao Gu, Zhi-Hua Guo, Ping-Ping Hao, Guo-Ming Wang, Zi-Ming Jin, Shao-Ling Zhang
APETALA2/ethylene response factor (AP2/ERF) transcription factor (TF) is a superfamily in plant kingdom, which has been reported to be involved in regulation of plant growth and development, fruit ripening, defense response, and metabolism. As the final response gene in ethylene signaling pathway, AP2/ERF TF could feedback modulate phytohormone biosynthesis, including ethylene, cytokinin, gibberellin, and abscisic acid. Moreover, AP2/ERF TF also participates in response to the signals of auxin, cytokinin, abscisic acid, and jasmonate...
December 2017: Botanical Studies (Taipei, Taiwan)
https://www.readbyqxmd.com/read/28505092/molecular-characterization-and-expression-profiling-of-tomato-grf-transcription-factor-family-genes-in-response-to-abiotic-stresses-and-phytohormones
#11
Khadiza Khatun, Arif Hasan Khan Robin, Jong-In Park, Ujjal Kumar Nath, Chang Kil Kim, Ki-Byung Lim, Ill Sup Nou, Mi-Young Chung
Growth regulating factors (GRFs) are plant-specific transcription factors that are involved in diverse biological and physiological processes, such as growth, development and stress and hormone responses. However, the roles of GRFs in vegetative and reproductive growth, development and stress responses in tomato (Solanum lycopersicum) have not been extensively explored. In this study, we characterized the 13 SlGRF genes. In silico analysis of protein motif organization, intron-exon distribution, and phylogenetic classification confirmed the presence of GRF proteins in tomato...
May 13, 2017: International Journal of Molecular Sciences
https://www.readbyqxmd.com/read/28501687/the-effects-of-combined-agricultural-phytohormones-on-the-growth-carbon-partitioning-and-cell-morphology-of-two-screened-algae
#12
Ze Yu, Mingming Song, Haiyan Pei, Liqun Jiang, Qingjie Hou, Changliang Nie, Lijie Zhang
Applying phytohormones has been considered a promising way to increase lipid productivity of microalgae recently. Eight dosages of auxin phytohormones were tested to exploit the effects and mechanism of such stimulants on microalgae. The optimal one was 20mgL(-1), leading to an increase in biomass concentration of 59.3% for Scenedesmus sp. SDEC-8 and 76.6% for Chlorella sorokiniana SDEC-18, meanwhile the lipid content rose from 18.74% to 56.17% (SDEC-8) and from 19.69% to 55.76% (SDEC-18). Proton pumps were activated by the stimulants, causing excretion of H(+), which resulted in pH decline and a favorable condition for growth...
May 3, 2017: Bioresource Technology
https://www.readbyqxmd.com/read/28501148/simultaneous-determination-of-acidic-phytohormones-in-cucumbers-and-green-bean-sprouts-by-ion-pair-stir-bar-sorptive-extraction-high-performance-liquid-chromatography
#13
Wei Wang, Man He, Beibei Chen, Bin Hu
A simple, sensitive and inexpensive method of ion-pair stir bar sorptive extraction (IP-SBSE) combined with high performance liquid chromatography -ultraviolet (HPLC-UV) detection was developed for the simultaneous determination of three acidic phytohormones (salicylic acid (SA), indole-3-acetic acid (IAA), and abscisic acid (ABA)) in vegetables. With the addition of cationic surfactant-cetyltrimethylammonium bromide (CTAB) in sample solutions, ion pair between CTAB and target phytohormones were formed, leading to an improvement of the extraction efficiency for target phytohormones by C18 silica coated SBSE...
August 1, 2017: Talanta
https://www.readbyqxmd.com/read/28500269/dynamic-cytology-and-transcriptional-regulation-of-rice-lamina-joint-development
#14
Lijuan Zhou, Langtao Xiao, Hong-Wei Xue
Rice leaf angle is determined by lamina joint and an important agricultural trait determining leaf erectness and hence the photosynthesis efficiency and grain yield. Genetic studies reveal a complex regulatory network of lamina joint development; however, the morphological changes, cytological transitions, and underlying transcriptional programming remain to be elucidated. A systemic morphological and cytological study reveals a dynamic developmental process and suggests a common but distinct regulation of lamina joint...
May 12, 2017: Plant Physiology
https://www.readbyqxmd.com/read/28499204/simultaneous-determination-of-nine-phytohormones-in-seaweed-and-algae-extracts-by-hplc-pda
#15
Bogusława Górka, Piotr P Wieczorek
An RP-HPLC-PDA method for the simultaneous analysis of 9 compounds deriving from the phytohormones class was developed and optimized, namely indoleacetic acid (IAA), indolebutyric acid (IBA), phenyleacetic acid (PAA), naphtyleacetic acid (NAA), trans-zeatin (TZ), kinetin (KA), isopentenyladenine (IA), 6-benzylaminopurine (6-BA) and abscisic acid (ABA). Validation of the method was performed on the SFE-CO2 extract made out of the mixture of Baltic algae. The regression coefficients for plant hormones were in the range from 0...
July 1, 2017: Journal of Chromatography. B, Analytical Technologies in the Biomedical and Life Sciences
https://www.readbyqxmd.com/read/28498521/does-drought-stress-modify-the-effects-of-plant-growth-promoting-rhizobacteria-on-an-aboveground-chewing-herbivore
#16
Maite Fernández de Bobadilla, Julia Friman, Nurmi Pangesti, Marcel Dicke, Joop J A van Loon, Ana Pineda
Soil microbes have important effects on the interactions of plants with their environment, by promoting plant growth, inducing resistance to pests or by conferring tolerance to abiotic stress. However, their effects are variable and the factors responsible for this variation are mainly unknown. Our aim was to assess how drought stress modifies the effect of the non-pathogenic rhizobacterium Pseudomonas simiae WCS417r on plant growth and resistance against the generalist leaf-chewing caterpillar Mamestra brassicae...
May 12, 2017: Insect Science
https://www.readbyqxmd.com/read/28498020/cell-cycle-genes-are-activated-earlier-than-respiratory-genes-during-release-of-grapevine-buds-from-endodormancy
#17
Ximena Noriega, Francisco J Pérez
Single-bud cuttings of Vitis vinifera L exposed to forced growing conditions were used to investigate the involvement of phytohormones, abscisic acid (ABA), auxin (Aux) and cytokinin (CK) in the release of buds from the ED and in bud-sprouting. This artificial system imitates and hastens the natural sprouting that occurs in spring. Temporal expression analysis of genes related to phytohormones synthesis, showed an early drop in the expression of ABA biosynthesis gene that preceded an increase in Aux and CK biosynthesis genes...
May 12, 2017: Plant Signaling & Behavior
https://www.readbyqxmd.com/read/28496196/tapimp2-a-pathogen-induced-myb-protein-in-wheat-contributes-to-host-resistance-to-common-root-rot-caused-by-bipolaris-sorokiniana
#18
Xuening Wei, Tianlei Shan, Yantao Hong, Huijun Xu, Xin Liu, Zengyan Zhang
MYB transcription factors (TFs) have been implicated in various biology processes in model plants. However, functions of the great majority of MYB TFs in wheat (Triticum aestivum L.) have not been characterized. The soil-borne fungal pathogens Bipolaris sorokiniana and Rhizoctonia cerealis are the causal agents of important destructive diseases of wheat. Here, the TaPIMP2 gene, encoding a pathogen-induced MYB protein in wheat, was isolated through comparative transcriptomic analysis, and its defensive role was studied...
May 11, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28492984/comparative-transcript-profiling-of-fertile-and-sterile-flower-buds-from-multiple-allele-inherited-male-sterility-in-chinese-cabbage-brassica-campestris-l-ssp-pekinensis
#19
Xue Zhou, Zhiyong Liu, Ruiqin Ji, Hui Feng
We studied the underlying causes of multiple-allele-inherited male sterility in Chinese cabbage (Brassica campestris L. ssp. pekinensis) by identifying differentially expressed genes (DEGs) related to pollen sterility between fertile and sterile flower buds. In this work, we verified the stages of sterility microscopically and then performed transcriptome analysis of mRNA isolated from fertile and sterile buds using Illumina HiSeq 2000 platform sequencing. Approximately 80% of ~229 million high-quality paired-end reads were uniquely mapped to the reference genome...
May 10, 2017: Molecular Genetics and Genomics: MGG
https://www.readbyqxmd.com/read/28487674/uncovering-potential-applications-of-cyanobacteria-and-algal-metabolites-in-biology-agriculture-and-medicine-current-status-and-future-prospects
#20
REVIEW
Rachana Singh, Parul Parihar, Madhulika Singh, Andrzej Bajguz, Jitendra Kumar, Samiksha Singh, Vijay P Singh, Sheo M Prasad
Cyanobacteria and algae having complex photosynthetic systems can channelize absorbed solar energy into other forms of energy for production of food and metabolites. In addition, they are promising biocatalysts and can be used in the field of "white biotechnology" for enhancing the sustainable production of food, metabolites, and green energy sources such as biodiesel. In this review, an endeavor has been made to uncover the significance of various metabolites like phenolics, phytoene/terpenoids, phytols, sterols, free fatty acids, photoprotective compounds (MAAs, scytonemin, carotenoids, polysaccharides, halogenated compounds, etc...
2017: Frontiers in Microbiology
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