Role of Ethylene and Bacterial ACC-Deaminase in Nodulation of Legumes

2017 ◽  
pp. 95-118
Author(s):  
Azeem Khalid ◽  
Zulfiqar Ahmad ◽  
Shahid Mahmood ◽  
Tariq Mahmood ◽  
Muhammad Imran
Keyword(s):  
Acc Deaminase

Role of ACC Deaminase in Stress Control of Leguminous Plants

2016 ◽  
pp. 179-192 ◽  
Author(s):  
Francisco X. Nascimento ◽  
Márcio J. Rossi ◽  
Bernard R. Glick
Keyword(s):  
Acc Deaminase ◽  
Leguminous Plants ◽  
Stress Control

scholarly journals Disparate role of rhizobial ACC deaminase in root-nodule symbioses

Symbiosis ◽  
2012 ◽  
Vol 57 (1) ◽  
pp. 43-50 ◽  
Author(s):  
Valérie Murset ◽  
Hauke Hennecke ◽  
Gabriella Pessi
Keyword(s):  
Root Nodule ◽  
Acc Deaminase

Role of ACC-deaminase and/or nitrogen fixing rhizobacteria in growth promotion of wheat (Triticum aestivum L.) under cadmium pollution

2016 ◽  
Vol 75 (3) ◽  
Author(s):  
Waseem Hassan ◽  
Safdar Bashir ◽  
Farhan Ali ◽  
Muhammad Ijaz ◽  
Mubshar Hussain ◽  
...  
Keyword(s):  
Triticum Aestivum ◽  
Growth Promotion ◽  
Acc Deaminase ◽  
Triticum Aestivum L ◽  
Nitrogen Fixing ◽  
Cadmium Pollution

scholarly journals Role of Bacillus aryabhattai in plant growth and development

2019 ◽  
Vol 39 (1) ◽  
Author(s):  
Ibomcha Ngangom ◽  
M. M. Nisha ◽  
S. Santhosh Kumar ◽  
K. V. Ravindra ◽  
Leela Tewari ◽  
...  
Keyword(s):  
Plant Growth ◽  
Plant Immunity ◽  
Acc Deaminase ◽  
Signalling Molecules ◽  
Bacillus Aryabhattai ◽  
Optimal Functioning ◽  
Wide Range ◽  
Indole 3 Acetic Acid ◽  
Lower Plant

Plants produce a wide range of organic compounds like sugars, organic acids and vitamins, which can be used as nutrients or signals by microbial populations. On the other hand, microorganisms release phytohormones, enzymes, which may act directly or indirectly to activate plant immunity and regulate plant growth. Plant signalling molecules such as auxin and cytokinin can be produced by microorganisms to colonize efficiently with roots and enhance root activity. The isolated microbe Bacillus aryabhattai, has the ability to produce1-aminocyclopropane-1-carboxylate (ACC) deaminase to lower plant ethylene level, often a result of various stresses, and is found to be a key component in the efficacious functioning of this bacterium. The optimal functioning of this bacterium includes the synergistic interaction between ACC deaminase, and plant with bacterial indole-3-acetic acid (IAA).

scholarly journals Disruption and Overexpression of the Gene Encoding ACC (1-Aminocyclopropane-1-Carboxylic Acid) Deaminase in Soil-Borne Fungal Pathogen Verticillium dahliae Revealed the Role of ACC as a Potential Regulator of Virulence and Plant Defense

2019 ◽  
Vol 32 (6) ◽  
pp. 639-653 ◽  
Author(s):  
Maria-Dimitra Tsolakidou ◽  
lakovos S. Pantelides ◽  
Aliki K. Tzima ◽  
Seogchan Kang ◽  
Epaminondas J. Paplomatas ◽  
...  
Keyword(s):  
Carboxylic Acid ◽  
Plant Defense ◽  
Verticillium Dahliae ◽  
Fungal Pathogen ◽  
Acc Deaminase ◽  
Plant Growth Promoting Rhizobacteria ◽  
Gene Encoding ◽  
Pathogen Virulence ◽  
Plant Growth Promoting

It has been suggested that some microorganisms, including plant growth–promoting rhizobacteria, manipulate the level of ethylene in plants by degrading 1-aminocyclopropane-1-carboxylic acid (ACC), an ethylene precursor, into α-ketobutyrate and ammonia, using ACC deaminase (ACCd). Here, we investigated whether ACCd of Verticillium dahliae, a soil-borne fungal pathogen of many important crops, is involved in causing vascular wilt disease. Overexpression of the V. dahliae gene encoding this enzyme, labeled as ACCd, significantly increased virulence in both tomato and eggplant, while disruption of ACCd reduced virulence. Both types of mutant produced more ethylene than a wild-type (70V-WT) strain, although they significantly differed in ACC content. Overexpression strains lowered ACC levels in the roots of infected plants, while the amount of ACC in the roots of plants infected with deletion mutants increased. To test the hypothesis that ACC acts as a signal for controlling defense, roots of WT and Never-ripe (Nr) tomato plants were treated with ACC before V. dahliae inoculation. Plants pretreated with ACC displayed less severe symptoms than untreated controls. Collectively, our results suggest a novel role of ACC as a regulator of both plant defense and pathogen virulence.

The Role of 1-Aminocyclopropane-1-Carboxylate (ACC) Deaminase Enzyme in Leguminous Nodule Senescence

2015 ◽  
pp. 715-724 ◽  
Author(s):  
Panlada Tittabutr ◽  
Nantakorn Boonkerd ◽  
Neung Teaumroong
Keyword(s):  
Acc Deaminase ◽  
Nodule Senescence

Effect of transferring 1-aminocyclopropane-1-carboxylic acid (ACC) deaminase genes intoPseudomonas fluorescensstrain CHA0 and itsgacA derivative CHA96 on their growth-promoting and disease-suppressive capacities

2000 ◽  
Vol 46 (10) ◽  
pp. 898-907 ◽  
Author(s):  
Chunxia Wang ◽  
Edouard Knill ◽  
Bernard R Glick ◽  
Geneviève Défago
Keyword(s):  
Carboxylic Acid ◽  
Root Length ◽  
Regulatory Region ◽  
Acc Deaminase ◽  
Soft Rot ◽  
Plant Diseases ◽  
Potato Tubers ◽  
Experimental Conditions ◽  
Growth Promoting

Pseudomonas fluorescens strain CHA0, a root colonizing bacterium, has a broad spectrum of biocontrol activity against plant diseases. However, strain CHA0 is unable to utilize 1-aminocyclopropane-1-carboxylic acid (ACC), the immediate precursor of plant ethylene, as a sole source of nitrogen. This suggests that CHA0 does not contain the enzyme ACC deaminase, which cleaves ACC to ammonia and α-ketobutyrate, and was previously shown to promote root elongation of plant seedlings treated with bacteria containing this enzyme. An ACC deaminase gene, together with its regulatory region, was transferred into P. fluorescens strains CHA0 and CHA96, a global regulatory gacA mutant of CHA0. ACC deaminase activity was expressed in both CHA0 and CHA96. Transformed strains with ACC deaminase activity increased root length of canola plants under gnotobiotic conditions, whereas strains without this activity had no effect. Introduction of ACC deaminase genes into strain CHA0 improved its ability to protect cucumber against Pythium damping-off, and potato tubers against Erwinia soft rot in small hermetically sealed containers. In contrast, ACC deaminase activity had no significant effect on the ability of CHA0 to protect tomato against Fusarium crown and root rot, and potato tubers against soft rot in large hermetically sealed containers. These results suggest that (i) ACC deaminase activity may have lowered the level of plant ethylene thereby increasing root length; (ii) the role of stress-generated plant ethylene in susceptibility or resistance depends on the host-pathogen system, and on the experimental conditions used; and (iii) the constructed strains could be developed as biosensors for the role of ethylene in plant diseases.Key words: biocontrol, plant growth-promoting rhizobacteria, ACC deaminase, ethylene biosensors.

scholarly journals The Role of Rhizobial ACC Deaminase in the Nodulation Process of Leguminous Plants

2016 ◽  
Vol 2016 ◽  
pp. 1-9 ◽  
Author(s):  
Francisco X. Nascimento ◽  
Clarisse Brígido ◽  
Bernard R. Glick ◽  
Márcio J. Rossi
Keyword(s):  
Stress Responses ◽  
Higher Plants ◽  
Growth Promotion ◽  
Agricultural Practices ◽  
Acc Deaminase ◽  
Nodule Development ◽  
Nodule Formation ◽  
Direct Role ◽  
Sustainable Agricultural Practices

Symbiotic rhizobia-legumes associations are extremely important in terms of sustainable agricultural practices. This symbiosis involves a complex interaction between both partners, plant and bacterium, for bacterial infection and the formation of symbiotic N-fixing nodules. In this regard, the phytohormone ethylene plays a significant role in nodule formation, acting as an inhibitor of the nodulation process. Ethylene not only regulates nodule development but also regulates many other plant developmental cues, including various stress responses that inhibit overall plant growth. Some rhizobia produce the enzyme 1-aminocyclopropane-1-carboxylate (ACC) deaminase, thus, being able to decrease ACC and, consequently, decrease deleterious ethylene levels that affect the nodulation process. This occurs because ACC is the immediate precursor of ethylene in all higher plants. Hence, rhizobia that express this enzyme have an increased symbiotic potential. In addition to the direct role that ACC deaminase plays in the nodulation processper se, in a limited number of instances, ACC deaminase can also modulate nodule persistence. This review focuses on the important role of rhizobial ACC deaminase during the nodulation process, emphasizing its significance to legume growth promotion.

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