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Phytohormone

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https://www.readbyqxmd.com/read/28813005/identification-and-functional-divergence-analysis-of-wox-gene-family-in-paper-mulberry
#1
Feng Tang, Naizhi Chen, Meiling Zhao, Yucheng Wang, Ruiping He, Xianjun Peng, Shihua Shen
The WOX (WUSCHEL-related homeobox) is a plant-specific transcription factor involved in plant development and stress response. However, few studies have been reported on the WOX gene in woody plants. In this study, 10 BpWOX genes were isolated from paper mulberry by RACE-PCR and categorized into three clades through phylogenetic analysis, ancient, intermediate and WUS clade. Among them, five members had the transcriptional activity detected by yeast one-hybrid and seven were uniquely localized to the nucleus through green fluorescent protein (GFP) observation...
August 16, 2017: International Journal of Molecular Sciences
https://www.readbyqxmd.com/read/28811017/improved-methodology-for-analysis-of-multiple-phytohormones-using-sequential-magnetic-solid-phase-extraction-coupled-with-liquid-chromatography-tandem-mass-spectrometry
#2
Xiao-Tong Luo, Bao-Dong Cai, Xi Chen, Yu-Qi Feng
Phytohormones are special small molecules that play important role in plant growth and development at trace levels. Quantification of multiple phytohormones will be great helpful for researches about cross-talks that plant hormones regulate the responses of plants against both biotic and abiotic stresses by means of synergistic or antagonistic interactions. In the current study, we developed a method for profiling of phytohormones in one small sample, including indole-3-acetic acid, abscisic acid, jasmonic acid, gibberellins, cytokinins and brassinosteroids...
August 29, 2017: Analytica Chimica Acta
https://www.readbyqxmd.com/read/28809396/ipa1-functions-as-a-downstream-transcription-factor-repressed-by-d53-in-strigolactone-signaling-in-rice
#3
Xiaoguang Song, Zefu Lu, Hong Yu, Gaoneng Shao, Jinsong Xiong, Xiangbing Meng, Yanhui Jing, Guifu Liu, Guosheng Xiong, Jingbo Duan, Xue-Feng Yao, Chun-Ming Liu, Hongqing Li, Yonghong Wang, Jiayang Li
Strigolactones (SLs), a group of carotenoid derived terpenoid lactones, are root-to-shoot phytohormones suppressing shoot branching by inhibiting the outgrowth of axillary buds. DWARF 53 (D53), the key repressor of the SL signaling pathway, is speculated to regulate the downstream transcriptional network of the SL response. However, no downstream transcription factor targeted by D53 has yet been reported. Here we report that Ideal Plant Architecture 1 (IPA1), a key regulator of the plant architecture in rice, functions as a direct downstream component of D53 in regulating tiller number and SL-induced gene expression...
August 15, 2017: Cell Research
https://www.readbyqxmd.com/read/28805482/cyclophilin-20-3-is-positioned-as-a-regulatory-hub-between-light-dependent-redox-and-12-oxo-phytodienoic-acid-signaling
#4
Hoon Cheong, Izailda Barbosa Dos Santos, Wenshan Liu, Heather N Gosse, Sang-Wook Park
The jasmonate family of phytohormones plays central roles in plant development and stress acclimation. However, the regulatory modes of their signaling circuitry remain largely unknown. Here we describe that cyclophilin 20-3 (CYP20-3), a binding protein of (+)-12-oxo-phytodienoic acid (OPDA), crisscrosses stress responses with light-dependent redox reactions, which fine-tunes the activity of key enzymes in the plastid photosynthetic carbon assimilation and sulfur assimilation pathways. Under stressed states, OPDA - accumulated in the chloroplasts - binds and promotes CYP20-3 to transfer electron (e(-)) from thioredoxins (i...
August 14, 2017: Plant Signaling & Behavior
https://www.readbyqxmd.com/read/28803341/gypsy-moth-herbivory-induced-volatiles-and-reduced-parasite-attachment-to-cranberry-hosts
#5
Muvari C Tjiurutue, Hilary A Sandler, Monica F Kersch-Becker, Nina Theis, Lynn S Adler
Interactions between species can have cascading effects that shape subsequent interactions. For example, herbivory can induce plant defenses that affect subsequent interactions with herbivores, pathogens, mycorrhizae, and pollinators. Parasitic plants are present in most ecosystems, and play important roles in structuring communities. However, the effects of host herbivory on parasitic plants, and the potential mechanisms underlying such effects, are not well known. We conducted a greenhouse study to ask whether gypsy moth (Lymantria dispar) damage, host cultivar, and their interaction affected preference of the stem parasite dodder (Cuscuta spp...
August 12, 2017: Oecologia
https://www.readbyqxmd.com/read/28798760/striking-the-right-chord-signaling-enigma-during-root-gravitropism
#6
REVIEW
Manjul Singh, Aditi Gupta, Ashverya Laxmi
Plants being sessile can often be judged as passive acceptors of their environment. However, plants are actually even more active in responding to the factors from their surroundings. Plants do not have eyes, ears or vestibular system like animals, still they "know" which way is up and which way is down? This is facilitated by receptor molecules within plant which perceive changes in internal and external conditions such as light, touch, obstacles; and initiate signaling pathways that enable the plant to react...
2017: Frontiers in Plant Science
https://www.readbyqxmd.com/read/28798173/draft-genome-sequence-of-the-endophytic-bacillus-aryabhattai-strain-squ-r12-identified-from-phoenix-dactylifera-l-roots
#7
Mahmoud W Yaish
Bacillus aryabhattai strain SQU-R12 was isolated from date palm seedlings, where it showed a growth-promoting capacity by being able to synthesize indole-3-acetic acid phytohormone and reduce ethylene biosynthesis by producing 1-aminocyclopropane-1-carboxylic acid deaminase. The draft genome sequence of this strain is reported here.
August 10, 2017: Genome Announcements
https://www.readbyqxmd.com/read/28794928/silicon-and-water-deficit-stress-differentially-modulate-physiology-and-ultrastructure-in-wheat-triticum-aestivum-l
#8
Ling Xu, Faisal Islam, Basharat Ali, Zengfei Pei, Juanjuan Li, Muhammad Awais Ghani, Weijun Zhou
Plants combat drought stress by coordinating various metabolic enzymes, and endogenous phytohormones, such as indole acetic acid (IAA) and abscisic acid (ABA). In the present study, 37-day-old wheat seedlings were subjected to the Hoagland solution with 20% PEG for 7 days (to create the artificial osmotic stress environment) in the greenhouse, and were supplemented with an optimized concentration (1.0 mM) of silicon (Si) to alleviate the negative effects of former stress on physiological, biochemical and phytohormones contents...
August 2017: 3 Biotech
https://www.readbyqxmd.com/read/28791296/metabolomics-and-proteomics-of-brassica-napus-guard-cells-in-response-to-low-co2
#9
Sisi Geng, Bing Yu, Ning Zhu, Craig Dufresne, Sixue Chen
Stomatal guard cell response to various stimuli is an important process that balances plant carbon dioxide (CO2) uptake and water transpiration. Elevated CO2 induces stomatal closure, while low CO2 promotes stomatal opening. The signaling process of elevated CO2 induced stomatal closure has been extensively studied in recent years. However, the mechanism of low CO2 induced stomatal opening is not fully understood. Here we report metabolomic and proteomic responses of Brassica napus guard cells to low CO2 using hyphenated mass spectrometry technologies...
2017: Frontiers in Molecular Biosciences
https://www.readbyqxmd.com/read/28769948/transcriptome-and-metabolite-changes-during-hydrogen-cyanamide-induced-floral-bud-break-in-sweet-cherry
#10
Irina A Ionescu, Gregorio López-Ortega, Meike Burow, Almudena Bayo-Canha, Alexander Junge, Oliver Gericke, Birger L Møller, Raquel Sánchez-Pérez
Release of bud dormancy in perennial woody plants is a temperature-dependent process and thus flowering in these species is heavily affected by climate change. The lack of cold winters in temperate growing regions often results in reduced flowering and low fruit yields. This is likely to decrease the availability of fruits and nuts of the Prunus spp. in the near future. In order to maintain high yields, it is crucial to gain detailed knowledge on the molecular mechanisms controlling the release of bud dormancy...
2017: Frontiers in Plant Science
https://www.readbyqxmd.com/read/28769110/bark-and-wood-tissues-of-american-elm-exhibit-distinct-responses-to-dutch-elm-disease
#11
S M Sherif, L A Erland, M R Shukla, P K Saxena
Tolerance to Dutch elm disease (DED) has been linked to the rapid and/or high induction of disease-responsive genes after infection with the fungus Ophiostoma novo-ulmi. Although the fungal infection by O. novo-ulmi primarily takes places in xylem vessels, it is still unclear how xylem contributes to the defense against DED. Taking advantage of the easy separation of wood and bark tissues in young American elm saplings, here we show that most disease-responsive genes exhibited higher expression in wood compared to bark tissues after fungal infection...
August 2, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28761993/coumarin-impairs-redox-homeostasis-in-wheat-aleurone-layers
#12
Ahmed M Saleh, Rashad Kebeish
Many plant families produce coumarin (COU) and its derivatives as secondary metabolites via the phenylpropanoid biosynthetic pathway. This ubiquitous group of phytochemicals was shown to have diverse physiological effects on cellular, tissue, and organ levels. So far, research dealing with the hormonal like behavior of COU and its interaction with the activity and/or transport of phytohormones is very limited. In the current study, the impact of COU on redox homeostasis in aleurone layers of wheat grains was investigated...
July 31, 2017: Journal of Plant Research
https://www.readbyqxmd.com/read/28756347/wheat-and-rye-genome-confer-specific-phytohormone-profile-features-and-interplay-under-water-stress-in-two-phenotypes-of-triticale
#13
Tomasz Hura, Michał Dziurka, Katarzyna Hura, Agnieszka Ostrowska, Kinga Dziurka, Joanna Gadzinowska
The aim of the experiment was to determine phytohormone profile of triticale and quality-based relationships between the analyzed groups of phytohormones. The study involved two triticale phenotypes, a long-stemmed one and a semi-dwarf one with Dw1 gene, differing in mechanisms of acclimation to drought and controlled by wheat or rye genome. Water deficit in the leaves triggered a specific phytohormone response in both winter triticale phenotypes attributable to the dominance of wheat (semi-dwarf cultivar) or rye (long-stemmed cultivar) genome...
July 19, 2017: Plant Physiology and Biochemistry: PPB
https://www.readbyqxmd.com/read/28754703/biosynthesis-and-evolution-of-coronafacoyl-phytotoxin-production-in-the-common-scab-pathogen-streptomyces-scabies
#14
Luke Bown, Yuting Li, Fabrice Berrué, Joost T P Verhoeven, Suzanne C Dufour, Dawn R D Bignell
Coronafacoyl phytotoxins are an important family of plant toxins that are produced by several different phytopathogenic bacteria, including the gammaproteobacterium Pseudomonas syringae and the actinobacterium Streptomyces scabies. The phytotoxins consist of coronafacic acid (CFA) linked via an amide bond to different amino acids or amino acid derivatives. Previous work suggested that S. scabies and P. syringae use distinct biosynthetic pathways for producing CFA, which is subsequently linked to its amino acid partner to form the complete phytotoxin...
July 28, 2017: Applied and Environmental Microbiology
https://www.readbyqxmd.com/read/28751549/cross-talk-of-brassinosteroid-signaling-in-controlling-growth-and-stress-responses
#15
REVIEW
Trevor Nolan, Jiani Chen, Yanhai Yin
Plants are faced with a barrage of stresses in their environment and must constantly balance their growth and survival. As such, plants have evolved complex control systems that perceive and respond to external and internal stimuli in order to optimize these responses, many of which are mediated by signaling molecules such as phytohormones. One such class of molecules called Brassinosteroids (BRs) are an important group of plant steroid hormones involved in numerous aspects of plant life including growth, development and response to various stresses...
July 27, 2017: Biochemical Journal
https://www.readbyqxmd.com/read/28744732/medicago-truncatula-oleanolic-derived-saponins-are-correlated-with-caterpillar-deterrence
#16
Fanping Cai, Bonnie S Watson, David Meek, David V Huhman, Daniel J Wherritt, Cecile Ben, Laurent Gentzbittel, Brian T Driscoll, Lloyd W Sumner, Jacqueline C Bede
Plant resistance mechanisms to insect herbivory can potentially be bred into crops as an important strategy for integrated pest management. Medicago truncatula ecotypes inoculated with the rhizobium Ensifer medicae (Sinorhizobium medica) WSM419 were screened for resistance to herbivory by caterpillars of the beet armyworm, Spodoptera exigua, through leaf and whole plant choice studies; TN1.11 and F83005.5 are identified as the least and most deterrent ecotypes, respectively. In response to caterpillar herbivory, both ecotypes mount a robust burst of plant defensive jasmonate phytohormones...
July 25, 2017: Journal of Chemical Ecology
https://www.readbyqxmd.com/read/28744290/photoreceptor-mediated-plant-growth-responses-implications-for-photoreceptor-engineering-toward-improved-performance-in-crops
#17
REVIEW
Ophilia I L Mawphlang, Eros V Kharshiing
Rising temperatures during growing seasons coupled with altered precipitation rates presents a challenging task of improving crop productivity for overcoming such altered weather patterns and cater to a growing population. Light is a critical environmental factor that exerts a powerful influence on plant growth and development ranging from seed germination to flowering and fruiting. Higher plants utilize a suite of complex photoreceptor proteins to perceive surrounding red/far-red (phytochromes), blue/UV-A (cryptochromes, phototropins, ZTL/FKF1/LKP2), and UV-B light (UVR8)...
2017: Frontiers in Plant Science
https://www.readbyqxmd.com/read/28739135/cytokinins-in-symbiotic-nodulation-when-where-what-for
#18
REVIEW
Pascal Gamas, Mathias Brault, Marie-Françoise Jardinaud, Florian Frugier
Substantial progress has been made in the understanding of early stages of the symbiotic interaction between legume plants and rhizobium bacteria. Those include the specific recognition of symbiotic partners, the initiation of bacterial infection in root hair cells, and the inception of a specific organ in the root cortex, the nodule. Increasingly complex regulatory networks have been uncovered in which cytokinin (CK) phytohormones play essential roles in different aspects of early symbiotic stages. Intriguingly, these roles can be either positive or negative, cell autonomous or non-cell autonomous, and vary, depending on time, root tissues, and possibly legume species...
July 21, 2017: Trends in Plant Science
https://www.readbyqxmd.com/read/28737742/systemic-transport-of-trans-zeatin-and-its-precursor-have-differing-roles-in-arabidopsis-shoots
#19
Asami Osugi, Mikiko Kojima, Yumiko Takebayashi, Nanae Ueda, Takatoshi Kiba, Hitoshi Sakakibara
Organ-to-organ signal transmission is essential for higher organisms to ensure coordinated biological reactions during metabolism and morphogenesis. Similar to organs in animals, plant organs communicate by various signalling molecules. Among them, cytokinins, a class of phytohormones, play a key role as root-to-shoot long-distance signals, regulating various growth and developmental processes in shoots(1,2). Previous studies have proposed that trans-zeatin-riboside, a type of cytokinin precursor, is a major long-distance signalling form in xylem vessels and its action depends on metabolic conversion via the LONELY GUY enzyme in proximity to the site of action(3-5)...
July 24, 2017: Nature Plants
https://www.readbyqxmd.com/read/28736087/sphingomonads-in-microbe-assisted-phytoremediation-tackling-soil-pollution
#20
REVIEW
Michael Gatheru Waigi, Kai Sun, Yanzheng Gao
Soil pollution has become a major concern in various terrestrial ecosystems worldwide. One in situ soil bioremediation strategy that has gained popularity recently is microbe-assisted phytoremediation, which is promising for remediating pollutants. Sphingomonads, a versatile bacteria group comprising four well-known genera, are ubiquitous in vegetation grown in contaminated soils. These Gram-negative microbes have been investigated for their ability to induce innate plant growth-promoting (PGP) traits, including the formation of phytohormones, siderophores, and chelators, in addition to their evolutionary adaptations enabling biodegradation and microbe-assisted removal of contaminants...
July 20, 2017: Trends in Biotechnology
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