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https://www.readbyqxmd.com/read/27486797/nmr-study-reveals-the-receiver-domain-of-arabidopsis-ethylene-response1-ethylene-receptor-as-an-atypical-type-response-regulator
#1
Yi-Lin Hung, Ingjye Jiang, Yi-Zong Lee, Chi-Kuang Wen, Shih-Che Sue
The gaseous plant hormone ethylene, recognized by plant ethylene receptors, plays a pivotal role in various aspects of plant growth and development. ETHYLENE RESPONSE1 (ETR1) is an ethylene receptor isolated from Arabidopsis and has a structure characteristic of prokaryotic two-component histidine kinase (HK) and receiver domain (RD), where the RD structurally resembles bacteria response regulators (RRs). The ETR1 HK domain has autophosphorylation activity, and little is known if the HK can transfer the phosphoryl group to the RD for receptor signaling...
2016: PloS One
https://www.readbyqxmd.com/read/27435661/ethylene-response-factor-terf1-regulated-by-ethylene-insensitive3-like-factors-functions-in-reactive-oxygen-species-ros-scavenging-in-tobacco-nicotiana-tabacum-l
#2
Hongbo Zhang, Ang Li, Zhijin Zhang, Zejun Huang, Pingli Lu, Dingyu Zhang, Xinmin Liu, Zhong-Feng Zhang, Rongfeng Huang
The phytohormone ethylene plays a crucial role in the production and accumulation of reactive oxygen species (ROS) in plants under stress conditions. Ethylene response factors (ERFs) are important ethylene-signaling regulators functioning in plant defense responses against biotic and abiotic stresses. However, the roles of ERFs during plant adapting to ROS stress have not yet been well documented. Our studies previously reported that a tomato ERF transcription factor TERF1 functions in the regulation of plant ethylene responses and stress tolerance...
2016: Scientific Reports
https://www.readbyqxmd.com/read/26657304/possible-role-of-1-aminocyclopropane-1-carboxylate-acc-deaminase-activity-of-sinorhizobium-sp-bl3-on-symbiosis-with-mung-bean-and-determinate-nodule-senescence
#3
Panlada Tittabutr, Sudarat Sripakdi, Nantakorn Boonkerd, Waraporn Tanthanuch, Kiwamu Minamisawa, Neung Teaumroong
Sinorhizobium sp. BL3 forms symbiotic interactions with mung bean (Vigna radiata) and contains lrpL-acdS genes, which encode the 1-aminocyclopropane-1-carboxylate (ACC) deaminase enzyme that cleaves ACC, a precursor of plant ethylene synthesis. Since ethylene interferes with nodule formation in some legumes and plays a role in senescence in plant cells, BL3-enhancing ACC deaminase activity (BL3(+)) and defective mutant (BL3(-)) strains were constructed in order to investigate the effects of this enzyme on symbiosis and nodule senescence...
2015: Microbes and Environments
https://www.readbyqxmd.com/read/26640476/the-role-of-ethylene-in-plants-under-salinity-stress
#4
REVIEW
Jian-Jun Tao, Hao-Wei Chen, Biao Ma, Wan-Ke Zhang, Shou-Yi Chen, Jin-Song Zhang
Although the roles of ethylene in plant response to salinity and other stresses have been extensively studied, there are still some obscure points left to be clarified. Generally, in Arabidopsis and many other terrestrial plants, ethylene signaling is indispensable for plant rapid response and tolerance to salinity stress. However, a few studies showed that functional knock-out of some ACSs increased plant salinity-tolerance, while overexpression of them caused more sensitivity. This seems to be contradictory to the known opinion that ethylene plays positive roles in salinity response...
2015: Frontiers in Plant Science
https://www.readbyqxmd.com/read/26286451/lace-plant-ethylene-receptors-amers1a-and-amers1c-regulate-ethylene-induced-programmed-cell-death-during-leaf-morphogenesis
#5
Gaolathe Rantong, Rodger Evans, Arunika H L A N Gunawardena
The lace plant, Aponogeton madagascariensis, is an aquatic monocot that forms perforations in its leaves as part of normal leaf development. Perforation formation occurs through developmentally regulated programmed cell death (PCD). The molecular basis of PCD regulation in the lace plant is unknown, however ethylene has been shown to play a significant role. In this study, we examined the role of ethylene receptors during perforation formation. We isolated three lace plant ethylene receptors AmERS1a, AmERS1b and AmERS1c...
October 2015: Plant Molecular Biology
https://www.readbyqxmd.com/read/26171216/ethylene-receptors-in-plants-why-so-much-complexity
#6
REVIEW
Daniel R Gallie
Ethylene is a hormone involved in numerous aspects of growth, development, and responses to biotic and abiotic stresses in plants. Ethylene is perceived through its binding to endoplasmic reticulum-localized receptors that function as negative regulators of ethylene signaling in the absence of the hormone. In Arabidopsis thaliana, five structurally and functionally different ethylene receptors are present. These differ in their primary sequence, in the domains present, and in the type of kinase activity exhibited, which may suggest functional differences among the receptors...
2015: F1000Prime Reports
https://www.readbyqxmd.com/read/25897004/bacterial-modulation-of-plant-ethylene-levels
#7
REVIEW
Elisa Gamalero, Bernard R Glick
A focus on the mechanisms by which ACC deaminase-containing bacteria facilitate plant growth.Bacteria that produce the enzyme 1-aminocyclopropane-1-carboxylate (ACC) deaminase, when present either on the surface of plant roots (rhizospheric) or within plant tissues (endophytic), play an active role in modulating ethylene levels in plants. This enzyme activity facilitates plant growth especially in the presence of various environmental stresses. Thus, plant growth-promoting bacteria that express ACC deaminase activity protect plants from growth inhibition by flooding and anoxia, drought, high salt, the presence of fungal and bacterial pathogens, nematodes, and the presence of metals and organic contaminants...
September 2015: Plant Physiology
https://www.readbyqxmd.com/read/25843012/targeting-plant-ethylene-responses-by-controlling-essential-protein-protein-interactions-in-the-ethylene-pathway
#8
Melanie M A Bisson, Georg Groth
The gaseous plant hormone ethylene regulates many processes of high agronomic relevance throughout the life span of plants. A central element in ethylene signaling is the endoplasmic reticulum (ER)-localized membrane protein ethylene insensitive2 (EIN2). Recent studies indicate that in response to ethylene, the extra-membranous C-terminal end of EIN2 is proteolytically processed and translocated from the ER to the nucleus. Here, we report that the conserved nuclear localization signal (NLS) mediating nuclear import of the EIN2 C-terminus provides an important domain for complex formation with ethylene receptor ethylene response1 (ETR1)...
August 2015: Molecular Plant
https://www.readbyqxmd.com/read/25520728/shedding-light-on-ethylene-metabolism-in-higher-plants
#9
Maria A Rodrigues, Ricardo E Bianchetti, Luciano Freschi
Ethylene metabolism in higher plants is regulated by a wide array of endogenous and environmental factors. During most physiological processes, ethylene levels are mainly determined by a strict control of the rate-limiting biosynthetic steps responsible for the production of 1-aminocyclopropane-1-carboxylic acid (ACC) and its subsequent conversion to ethylene. Responsible for these reactions, the key enzymes ACC synthase and ACC oxidase are encoded by multigene families formed by members that can be differentially regulated at the transcription and post-translational levels by specific developmental and environmental signals...
2014: Frontiers in Plant Science
https://www.readbyqxmd.com/read/25451923/structural-model-of-the-cytosolic-domain-of-the-plant-ethylene-receptor-1-etr1
#10
Hubert Mayerhofer, Saravanan Panneerselvam, Heidi Kaljunen, Anne Tuukkanen, Haydyn D T Mertens, Jochen Mueller-Dieckmann
Ethylene initiates important aspects of plant growth and development through disulfide-linked receptor dimers located in the endoplasmic reticulum. The receptors feature a small transmembrane, ethylene binding domain followed by a large cytosolic domain, which serves as a scaffold for the assembly of large molecular weight complexes of different ethylene receptors and other cellular participants of the ethylene signaling pathway. Here we report the crystallographic structures of the ethylene receptor 1 (ETR1) catalytic ATP-binding and the ethylene response sensor 1 dimerization histidine phosphotransfer (DHp) domains and the solution structure of the entire cytosolic domain of ETR1, all from Arabidopsis thaliana...
January 30, 2015: Journal of Biological Chemistry
https://www.readbyqxmd.com/read/25367135/assessment-of-ethylene-diurea-induced-protection-in-plants-against-ozone-phytotoxicity
#11
REVIEW
Aditya Abha Singh, Shalini Singh, Madhoolika Agrawal, Shashi Bhushan Agrawal
Urbanization, industrialization and unsustainable utilization of natural resources have made tropospheric ozone (03) one of the world's most significant air pollutants. Past studies reveal that 0 3 is a phytotoxic air pollutant that causes or enhances food insecurity across the globe. Plant sensitivity, tolerance and resistance to 0 3 involve a wide array of responses that range from growth to the physiological, biochemical and molecular. Although plants have an array of defense systems to combat oxidative stress from 0 3 exposure, they still suffer sizable yield reductions...
2015: Reviews of Environmental Contamination and Toxicology
https://www.readbyqxmd.com/read/25251011/potato-virus-y-infection-hinders-potato-defence-response-and-renders-plants-more-vulnerable-to-colorado-potato-beetle-attack
#12
Marko Petek, Ana Rotter, Polona Kogovšek, Spela Baebler, Axel Mithöfer, Kristina Gruden
In the field, plants are challenged by more than one biotic stressor at the same time. In this study, the molecular interactions between potato (Solanum tuberosum L.), Colorado potato beetle (Leptinotarsa decemlineata Say; CPB) and Potato virus Y(NTN) (PVY(NTN) ) were investigated through analyses of gene expression in the potato leaves and the gut of the CPB larvae, and of the release of potato volatile compounds. CPB larval growth was enhanced when reared on secondary PVY(NTN) -infected plants, which was linked to decreased accumulation of transcripts associated with the antinutritional properties of potato...
November 2014: Molecular Ecology
https://www.readbyqxmd.com/read/25082369/cadmium-induced-ethylene-production-and-responses-in-arabidopsis-thaliana-rely-on-acs2-and-acs6-gene-expression
#13
Kerim Schellingen, Dominique Van Der Straeten, Filip Vandenbussche, Els Prinsen, Tony Remans, Jaco Vangronsveld, Ann Cuypers
BACKGROUND: Anthropogenic activities cause metal pollution worldwide. Plants can absorb and accumulate these metals through their root system, inducing stress as a result of excess metal concentrations inside the plant. Ethylene is a regulator of multiple plant processes, and is affected by many biotic and abiotic stresses. Increased ethylene levels have been observed after exposure to excess metals but it remains unclear how the increased ethylene levels are achieved at the molecular level...
2014: BMC Plant Biology
https://www.readbyqxmd.com/read/24563292/recent-developments-in-use-of-1-aminocyclopropane-1-carboxylate-acc-deaminase-for-conferring-tolerance-to-biotic-and-abiotic-stress
#14
REVIEW
Iti Gontia-Mishra, Shaly Sasidharan, Sharad Tiwari
Ethylene is an essential plant hormone also known as a stress hormone because its synthesis is accelerated by induction of a variety of biotic and abiotic stress. The plant growth promoting bacteria containing the enzyme 1-aminocyclopropane-1-carboxylate (ACC) deaminase enhances plant growth by decreasing plant ethylene levels under stress conditions. The expression of ACC deaminase (acdS) gene in transgenic plants is an alternative approach to overcome the ethylene-induced stress. Several transgenic plants have been engineered to express both bacterial/plant acdS genes which then lowers the stress-induced ethylene levels, thus efficiently combating the deleterious effects of environmental stresses...
May 2014: Biotechnology Letters
https://www.readbyqxmd.com/read/24553847/the-symbiosis-with-the-arbuscular-mycorrhizal-fungus-rhizophagus-irregularis-drives-root-water-transport-in-flooded-tomato-plants
#15
Monica Calvo-Polanco, Sonia Molina, Angel María Zamarreño, Jose María García-Mina, Ricardo Aroca
It is known that the presence of arbuscular mycorrhizal fungi within the plant roots enhances the tolerance of the host plant to different environmental stresses, although the positive effect of the fungi in plants under waterlogged conditions has not been well studied. Tolerance of plants to flooding can be achieved through different molecular, physiological and anatomical adaptations, which will affect their water uptake capacity and therefore their root hydraulic properties. Here, we investigated the root hydraulic properties under non-flooded and flooded conditions in non-mycorrhizal tomato plants and plants inoculated with the arbuscular mycorrhizal fungus Rhizophagus irregularis...
May 2014: Plant & Cell Physiology
https://www.readbyqxmd.com/read/24494928/cold-acclimation-induced-freezing-tolerance-of-medicago-truncatula-seedlings-is-negatively-regulated-by-ethylene
#16
Mingui Zhao, Wenjing Liu, Xiuzhi Xia, Tianzuo Wang, Wen-Hao Zhang
To evaluate the role of ethylene in cold acclimation and cold stress, freezing tolerance and characteristics associated with cold acclimation were investigated using legume model plant Medicago truncatula Gaertn Jemalong A17. There was a rapid suppression of ethylene production during cold acclimation in A17 plants. Ethylene level was negatively correlated with freezing tolerance as inhibition of ethylene biosynthesis by inhibitors of ethylene biosynthesis enhanced freezing tolerance, while exogenous application of ethylene reduced cold acclimation-induced freezing tolerance...
September 2014: Physiologia Plantarum
https://www.readbyqxmd.com/read/24220707/improvement-of-regeneration-of-lycopersicon-pennellii-protoplasts-by-decreasing-ethylene-production
#17
N O Rethmeier, C E Jansen, E A Snel, H J Nijkamp, J Hille
Lycopersicon pennellii shoots, cultured in vitro for more than a year (type I plants) produced few viable protoplasts in contrast to shoots cultured in vitro for less than five months (type II plants). Ethylene production of both plant types was compared. The low viability of plant type I protoplasts could be correlated with high ethylene production and an increased cell sap osmolality. The ethylene action inhibitor silver thiosulphate improved protoplast yield and viability, especially when using donor tissue, germinated and cultured on medium containing silver thiosulphate (type III plants)...
February 1991: Plant Cell Reports
https://www.readbyqxmd.com/read/24095919/current-understanding-on-ethylene-signaling-in-plants-the-influence-of-nutrient-availability
#18
REVIEW
Noushina Iqbal, Alice Trivellini, Asim Masood, Antonio Ferrante, Nafees A Khan
The plant hormone ethylene is involved in many physiological processes, including plant growth, development and senescence. Ethylene also plays a pivotal role in plant response or adaptation under biotic and abiotic stress conditions. In plants, ethylene production often enhances the tolerance to sub-optimal environmental conditions. This role is particularly important from both ecological and agricultural point of views. Among the abiotic stresses, the role of ethylene in plants under nutrient stress conditions has not been completely investigated...
December 2013: Plant Physiology and Biochemistry: PPB
https://www.readbyqxmd.com/read/24095256/bacteria-with-acc-deaminase-can-promote-plant-growth-and-help-to-feed-the-world
#19
REVIEW
Bernard R Glick
To feed all of the world's people, it is necessary to sustainably increase agricultural productivity. One way to do this is through the increased use of plant growth-promoting bacteria; recently, scientists have developed a more profound understanding of the mechanisms employed by these bacteria to facilitate plant growth. Here, it is argued that the ability of plant growth-promoting bacteria that produce 1-aminocyclopropane-1-carboxylate (ACC) deaminase to lower plant ethylene levels, often a result of various stresses, is a key component in the efficacious functioning of these bacteria...
January 20, 2014: Microbiological Research
https://www.readbyqxmd.com/read/23759102/a-chemical-genetics-approach-reveals-a-role-of-brassinolide-and-cellulose-synthase-in-hypocotyl-elongation-of-etiolated-arabidopsis-seedlings
#20
I-Ju Chen, Wan-Sheng Lo, Jung-Yun Chuang, Chiao-Mei Cheuh, Yu-Shan Fan, Lee-Chung Lin, Shaw-Jye Wu, Long-Chi Wang
The development of juvenile seedlings after germination is critical for the initial establishment of reproductive plants. Ethylene plays a pivotal role in the growth of seedlings under light or dark during early development. Previously, we identified small molecules sharing a quinazolinone backbone that suppressed the constitutive triple response phenotype in dark-grown eto1-4 seedlings. We designated these small molecules as ACSinhibitor quinazolinones (acsinones), which were uncompetitive inhibitors of 1-aminocyclopropane-1-carboxylic acid synthase...
August 2013: Plant Science: An International Journal of Experimental Plant Biology
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