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https://www.readbyqxmd.com/read/28624670/towards-engineering-of-hormonal-crosstalk-in-plant-immunity
#1
REVIEW
Alexandra M Shigenaga, Matthias L Berens, Kenichi Tsuda, Cristiana T Argueso
Plant hormones regulate physiological responses in plants, including responses to pathogens and beneficial microbes. The last decades have provided a vast amount of evidence about the contribution of different plant hormones to plant immunity, and also of how they cooperate to orchestrate immunity activation, in a process known as hormone crosstalk. In this review we highlight the complexity of hormonal crosstalk in immunity and approaches currently being used to further understand this process, as well as perspectives to engineer hormone crosstalk for enhanced pathogen resistance and overall plant fitness...
June 15, 2017: Current Opinion in Plant Biology
https://www.readbyqxmd.com/read/28622672/physiological-effects-of-single-and-multi-walled-carbon-nanotubes-on-rice-seedlings
#2
Hao Zhang, Mengxia Yue, Xueke Zheng, Chengshen Xie, Hong Zhou, Lijia Li
In this paper, single-walled carbon nanotubes (SWCNTs) and multi-walled carbon nanotubes (MWCNTs) were found to accelerate leaf growth and development of rice seedlings at a low concentration (20 mg/L), accompanied with the increased chlorophyll content and net photosynthetic rate (PN). Quantitative real-time polymerase chain reaction (RT-PCR) results indicated that both SWCNTs and MWCNTs significantly increased expression of genes associated with chloroplast development and cell sizes. Further analysis revealed that the abscisic acid (ABA) content decreased and the gibberellin (GA) content increased while the content of O2 and H2O2 was slightly elevated and the activities of antioxidative enzymes (SOD, EC 1...
June 14, 2017: IEEE Transactions on Nanobioscience
https://www.readbyqxmd.com/read/28622601/immobilisation-of-barley-aleurone-layers-enables-parallelisation-of-assays-and-analysis-of-transient-gene-expression-in-single-cells
#3
Kinga Zór, Christina Mark, Arto Heiskanen, Claus Krogh Madsen, Martin Dufva, Jenny Emnéus, Henrik Brinch-Pedersen, Christine Finnie
The barley aleurone layer is an established model system for studying phytohormone signalling, enzyme secretion and programmed cell death during seed germination. Most analyses performed on the aleurone layer are end-point assays based on cell extracts, meaning each sample is only analysed at a single time point. By immobilising barley aleurone layer tissue on polydimethylsiloxane pillars in the lid of a multiwell plate, continuous monitoring of living tissue is enabled using multiple non-destructive assays in parallel...
June 8, 2017: Plant Physiology and Biochemistry: PPB
https://www.readbyqxmd.com/read/28620758/transcriptome-analysis-of-drought-responsive-genes-regulated-by-hydrogen-sulfide-in-wheat-triticum-aestivum-l-leaves
#4
Hua Li, Min Li, Xingliang Wei, Xia Zhang, Ruili Xue, Yidan Zhao, Huijie Zhao
Drought is an environmental factor that deeply impacts wheat yield and quality. Hydrogen sulfide (H2S) is a known regulator of drought resistance in plants. To preliminarily elucidate the regulatory mechanisms of H2S on drought tolerance, the effects of H2S on drought-responsive genes were investigated by transcriptome analysis. As a result, a total of 7552 transcripts not only responded to drought stress but also exhibited differential expression relative to the polyethylene glycol (PEG) treatment (P) and the NaHS pretreatment with PEG treatment (SP)...
June 15, 2017: Molecular Genetics and Genomics: MGG
https://www.readbyqxmd.com/read/28615634/transcriptome-profiling-of-cucumis-metuliferus-infected-by-meloidogyne-incognita-provides-new-insights-into-putative-defense-regulatory-network-in-cucurbitaceae
#5
Jian Ling, Zhenchuan Mao, Mingjuan Zhai, Feng Zeng, Yuhong Yang, Bingyan Xie
Root-knot nematodes (RKN) represent extensive challenges to Cucurbitaceae crops. However, Cucumis metuliferus (Cm) is known to be resistant to Meloidogyne incognita (Mi) infections. Thus, analysis of differentially expressed genes may lead to a comprehensive gene expression profiling of the incompatible Cm-Mi interaction. In this study, the time-course transcriptome of Cm against Mi infection was monitored using RNA-Seq. More than 170000 transcripts were examined in Cm roots, and 2430 genes were subsequently identified as differentially expressed in response to Mi infection...
June 14, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28605605/nanosensor-technology-applied-to-living-plant-systems
#6
Seon-Yeong Kwak, Min Hao Wong, Tedrick Thomas Salim Lew, Gili Bisker, Michael A Lee, Amir Kaplan, Juyao Dong, Albert Tianxiang Liu, Volodymyr B Koman, Rosalie Sinclair, Catherine Hamann, Michael S Strano
An understanding of plant biology is essential to solving many long-standing global challenges, including sustainable and secure food production and the generation of renewable fuel sources. Nanosensor platforms, sensors with a characteristic dimension that is nanometer in scale, have emerged as important tools for monitoring plant signaling pathways and metabolism that are nondestructive, minimally invasive, and capable of real-time analysis. This review outlines the recent advances in nanotechnology that enable these platforms, including the measurement of chemical fluxes even at the single-molecule level...
June 12, 2017: Annual Review of Analytical Chemistry
https://www.readbyqxmd.com/read/28602514/a-jasmonic-acid-derivative-improves-skin-healing-and-induces-changes-in-proteoglycan-expression-and-glycosaminoglycan-structure
#7
Elodie Henriet, Sibylle Jäger, Christian Tran, Philippe Bastien, Jean-François Michelet, Anne-Marie Minondo, Florian Formanek, Maria Dalko-Csiba, Hugues Lortat-Jacob, Lionel Breton, Romain R Vivès
BACKGROUND: Jasmonates are plant hormones that exhibit anti-cancer and anti-inflammatory properties and have therefore raised interest for human health applications. The molecular basis of these activities remains poorly understood, although increasing evidence suggests that a variety of mechanisms may be involved. Recently, we have reported that a jasmonate derivative (JAD) displayed anti-aging effects on human skin by inducing extracellular matrix (ECM) remodeling. Based on this observation, we have investigated here the effects of JAD on proteoglycans and glycosaminoglycan (GAG) polysaccharides, which are major cell-surface/ECM components and are involved in a multitude of biological processes...
June 7, 2017: Biochimica et Biophysica Acta
https://www.readbyqxmd.com/read/28601518/biochemical-responses-and-ultrastructural-changes-in-ethylene-insensitive-mutants-of-arabidopsis-thialiana-subjected-to-bisphenol-a-exposure
#8
Imran Ali, Mehmood Jan, Abdul Wakeel, Azizullah Azizullah, Bohan Liu, Faisal Islam, Abid Ali, M K Daud, Yihua Liu, Yinbo Gan
Bisphenol A (BPA), an important raw material in plastic industry, has become a serious environmental contaminant due to its wide spread use in different products and increasing release into the environment. BPA is known to cause adverse effects in living organisms including plants. Several studies reported that BPA affects growth and development in plants, mainly through oxidative stress. Plants are known to generally cope with stress mainly through hormonal regulation and adaptation, but little is known about the role of plant hormones in plants under BPA stress...
June 8, 2017: Ecotoxicology and Environmental Safety
https://www.readbyqxmd.com/read/28598262/strigolactones-in-the-rhizosphere-friend-or-foe
#9
Carolien De Cuyper, Sofie Goormachtig
Strigolactones are well-known endogenous plant hormones that play a major role in planta by influencing different physiological processes. Moreover, ex planta, strigolactones are important signaling molecules in root exudates and function as host detection cues to launch mutualistic interactions with arbuscular mycorrhizal fungi in the rhizosphere. However, parasitic plants belonging to the Orobanchaceae family hijacked this communication system to stimulate their seed germination when in close proximity to the roots of a suitable host...
June 9, 2017: Molecular Plant-microbe Interactions: MPMI
https://www.readbyqxmd.com/read/28594299/dimerization-of-gtr1-regulates-their-plasma-membrane-localization
#10
Yasuhiro Ishimaru, Kento Washiyama, Takaya Oikawa, Shin Hamamoto, Nobuyuki Uozumi, Minoru Ueda
Members of the nitrate transporter 1/peptide transporter family (NPF) are multifunctional transporters of various compounds including plant hormones and play important roles in plant growth and responses to environmental stress. Recently, we found that Arabidopsis GTR1 (also known as NPF2.10) takes up gibberellic acid and jasmonoyl-L-isoleucine in addition to glucosinolates. For normal plant growth, GTR1 is regulated at the gene expression level; however, it is unclear whether post-translational regulation also occurs...
June 8, 2017: Plant Signaling & Behavior
https://www.readbyqxmd.com/read/28587634/sinapic-acid-or-its-derivatives-interfere-with-abscisic-acid-homeostasis-during-arabidopsis-thaliana-seed-germination
#11
Baodi Bi, Jingliang Tang, Shuang Han, Jinggong Guo, Yuchen Miao
BACKGROUND: Sinapic acid and its esters have broad functions in different stages of seed germination and plant development and are thought to play a role in protecting against ultraviolet irradiation. To better understand the interactions between sinapic acid esters and seed germination processes in response to various stresses, we analyzed the role of the plant hormone abscisic acid (ABA) in the regulation of sinapic acid esters involved in seed germination and early seedling growth...
June 6, 2017: BMC Plant Biology
https://www.readbyqxmd.com/read/28584713/transcriptome-analysis-reveals-the-regulation-of-brassinosteroids-on-petal-growth-in-gerbera-hybrida
#12
Gan Huang, Meixiang Han, Wei Yao, Yaqin Wang
Gerbera hybrida is a cut-flower crop of global importance, and an understanding of the mechanisms underlying petal development is vital for the continued commercial development of this plant species. Brassinosteroids (BRs), a class of phytohormones, are known to play a major role in cell expansion, but their effect on petal growth in G. hybrida is largely unexplored. In this study, we found that the brassinolide (BL), the most active BR, promotes petal growth by lengthening cells in the middle and basal regions of petals, and that this effect on petal growth was greater than that of gibberellin (GA)...
2017: PeerJ
https://www.readbyqxmd.com/read/28579998/aba-represses-the-expression-of-cell-cycle-genes-and-may-modulate-the-development-of-endodormancy-in-grapevine-buds
#13
Ricardo Vergara, Ximena Noriega, Karla Aravena, Humberto Prieto, Francisco J Pérez
Recently, the plant hormone abscisic acid (ABA) has been implicated as a key player in the regulation of endodormancy (ED) in grapevine buds (Vitis vinifera L). In this study, we show that in the vine, the expression of genes related to the biosynthesis of ABA (VvNCED1; VvNCED2) and the content of ABA are significantly higher in the latent bud than at the shoot apex, while the expression of an ABA catabolic gene (VvA8H3) showed no significant difference between either organ. A negative correlation between the content of ABA and transcript levels of cell cycle genes (CCG) was found in both tissues...
2017: Frontiers in Plant Science
https://www.readbyqxmd.com/read/28575477/regulation-of-gene-expressions-in-the-remobilization-of-carbon-reserve-in-straws-of-rice-at-grain-filling
#14
Guan-Qun Wang, Shuai-Shuai Hao, Bei Gao, Mo-Xian Chen, Ying-Gao Liu, Jian-Chang Yang, Neng-Hui Ye, Jian-Hua Zhang
Carbon reserves in rice straws before flowering contribute to a significant portion of grain filling. However, the molecular mechanism of carbon reserve remobilization from straws (stem and sheath) to grains remains unclear. In this study, super rice LYP9 and conventional rice 9311 showed different carbon reserves remobilization behaviors. The transcriptomic profiles of straws of LYP9 and 9311 were analyzed at three stages of grain filling. Among the differentially expressed genes (DGs), 5733 genes were uniquely up- or down-regulated at 30 days after anthesis (DAA) between LYP9 and 9311 in comparison to 681 at 10 DAA and 495 at 20 DAA, respectively, suggesting that the gene expression profile of LYP9 was much different than that of 9311 at late stage of grain filling...
May 29, 2017: Plant & Cell Physiology
https://www.readbyqxmd.com/read/28574483/expression-profiling-of-strawberry-allergen-fra-a-during-fruit-ripening-controlled-by-exogenous-auxin
#15
Misaki Ishibashi, Hiroki Yoshikawa, Yuichi Uno
Strawberry fruit contain the allergenic Fra a proteins, members of the pathogenesis-related 10 protein family that causes oral allergic syndrome symptoms. Fra a proteins are involved in the flavonoid biosynthesis pathway, which might be important for color development in fruits. Auxin is an important plant hormone in strawberry fruit that controls fruit fleshiness and ripening. In this study, we treated strawberry fruits with exogenous auxin or auxin inhibitors at pre- and post-harvest stages, and analyzed Fra a transcriptional and translational expression levels during fruit development by real-time PCR and immunoblotting...
June 2, 2017: International Journal of Molecular Sciences
https://www.readbyqxmd.com/read/28573759/persistence-of-plant-hormone-levels-in-rice-shoots-grown-under-microgravity-conditions-in-space-its-relationship-to-maintenance-of-shoot-growth
#16
Kazuyuki Wakabayashi, Kouichi Soga, Takayuki Hoson, Toshihisa Kotake, Mikiko Kojima, Hitoshi Sakakibara, Takashi Yamazaki, Akira Higashibata, Noriaki Ishioka, Toru Shimazu, Motoshi Kamada
We investigated the effects of microgravity environment on growth and plant hormone levels in dark-grown rice shoots cultivated in artificial 1 g and microgravity conditions on the International Space Station (ISS). Growth of microgravity-grown shoots was comparable to that of 1 g-grown shoots. Endogenous levels of indole-3-acetic acid (IAA) in shoots remained constant, while those of abscisic acid (ABA), jasmonic acid (JA), cytokinins (CKs), and gibberellins (GAs) decreased during the cultivation period under both conditions...
June 1, 2017: Physiologia Plantarum
https://www.readbyqxmd.com/read/28567047/brassinosteroid-mediated-cell-wall-remodeling-in-grasses-under-abiotic-stress
#17
REVIEW
Xiaolan Rao, Richard A Dixon
Unlike animals, plants, being sessile, cannot escape from exposure to severe abiotic stresses such as extreme temperature and water deficit. The dynamic structure of plant cell wall enables them to undergo compensatory changes, as well as maintain physical strength, with changing environments. Plant hormones known as brassinosteroids (BRs) play a key role in determining cell wall expansion during stress responses. Cell wall deposition differs between grasses (Poaceae) and dicots. Grass species include many important food, fiber, and biofuel crops...
2017: Frontiers in Plant Science
https://www.readbyqxmd.com/read/28558130/strigolactones-karrikins-and-beyond
#18
REVIEW
Carolien De Cuyper, Sylwia Struk, Lukas Braem, Kris Gevaert, Geert De Jaeger, Sofie Goormachtig
The plant hormones strigolactones are synthesized from carotenoids and signal via the α/β hydrolase DWARF 14 (D14) and the F-box protein MORE AXILLARY GROWTH 2 (MAX2). Karrikins, molecules produced upon fire, share MAX2 for signaling, but depend on the D14 paralog KARRIKIN INSENSITIVE 2 (KAI2) for perception with strong evidence that the MAX2-KAI2 protein complex might also recognize so far unknown plant-made karrikin-like molecules. Thus, the phenotypes of the max2 mutants are the complex consequence of a loss of both D14- and KAI2-dependent signaling, hence the reason why some biological roles, attributed to strigolactones based on max2 phenotypes, could never be observed in d14 or in the strigolactone-deficient max3 and max4 mutants...
May 30, 2017: Plant, Cell & Environment
https://www.readbyqxmd.com/read/28552570/de-novo-assembly-and-analysis-of-the-pugionium-cornutum-l-gaertn-transcriptome-and-identification-of-genes-involved-in-the-drought-response
#19
Ping Wang, Fengfeng Wang, Jing Yang
Pugionium cornutum (L.) Gaertn. is a xerophytic plant species widely distributed in sandy and desert habitats in northwest China. However, the molecular mechanism of drought tolerance in P. cornutum has received little attention. At present, there is limited available transcriptome information for P. cormutum in public databases. Illumina sequencing was used to identify drought-responsive genes and to further characterize the molecular basis of drought tolerance in P. cornutum. In total, 51,385 unigenes with an average length of 825...
May 25, 2017: Gene
https://www.readbyqxmd.com/read/28551419/potential-link-between-fruit-yield-quality-parameters-and-phytohormonal-changes-in-preharvest-uv-c-treated-strawberry
#20
Yanqun Xu, Marie Thérèse Charles, Zisheng Luo, Dominique Roussel, Daniel Rolland
Preharvest ultraviolet-C (UV-C) treatment of strawberry is a very new approach, and little information is available on the effect of this treatment on plant growth regulators. In this study, the effect of preharvest UV-C irradiations at three different doses on strawberry yield, fruit quality parameters and endogenous phytohormones was investigated simultaneously. The overall marketable yield of strawberry was not affected by the preharvest UV-C treatments, although more aborted and misshapen fruits were found in UV-C treated groups than in the untreated control...
May 19, 2017: Plant Physiology and Biochemistry: PPB
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