Induction of systemic resistance to Agrobacterium tumefaciens by endophytic bacteria in grapevine

2020 ◽  
Vol 69 (5) ◽  
pp. 827-837 ◽  
Author(s):  
Susan Asghari ◽  
Behrouz Harighi ◽  
Morahem Ashengroph ◽  
Christophe Clement ◽  
Aziz Aziz ◽  
...  
Keyword(s):  
Agrobacterium Tumefaciens ◽  
Endophytic Bacteria ◽  
Systemic Resistance

scholarly journals POTENSI BAKTERI ENDOFIT MENGINDUKSI KETAHANAN TANAMAN LADA TERHADAP INFEKSI Meloidogyne incognita

2020 ◽  
Vol 17 (3) ◽  
pp. 118 ◽  
Author(s):  
RITA HARNI ◽  
MEYNARTI SARI DEWI IBRAHIM
Keyword(s):  
Root System ◽  
Meloidogyne Incognita ◽  
Endophytic Bacteria ◽  
Black Pepper ◽  
Systemic Resistance ◽  
Piper Nigrum ◽  
Control Methods ◽  
Root Knot Nematode ◽  
Split Root ◽  
Split Root System

<p>ABSTRAK</p><p>Meloidogyne incognita, merupakan salah satu organisme peng-ganggu (OPT) penyebab penyakit kuning pada tanaman lada dan dapatmengakibatkan penurunan hasil sampai 32%. Beberapa teknik untukmengendalikan patogen ini telah dilakukan tetapi belum memberikan hasilyang memuaskan. Pengendalian biologi dengan menggunakan bakteriendofit merupakan salah satu alternatif pengendalian yang cukup men-janjikan untuk dapat mengatasi permasalahan nematoda penyakit tanaman.Penelitian ini telah dilakukan di Laboratorium Bakteriologi danNematologi Departemen Proteksi Tanaman Institut Pertanian Bogor, danRumah Kaca Balai Penelitian Tanaman Rempah dan Aneka TanamanIndustri Pakuwon Sukabumi dari bulan Mei sampai November 2009.Kegiatan yang dilakukan adalah: 1) Seleksi beberapa isolat bakteri endofituntuk mengendalikan nematoda M. incognita pada tanaman lada dan 2)Potensi induced systemic resistance (ISR) dan analisis asam salisilat sertaperoksidase. Isolat bakteri endofit yang digunakan adalah isolat bakteriendofit potensial yang diisolasi dari akar nilam. Akar tanaman ladadirendam dalam suspensi bakteri endofit, selanjutnya diinokulasi dengan500 ekor larva 2 M. incognita. Sebulan setelah inokulasi tanamandibongkar diamati populasi nematoda dan pertumbuhan tanaman. AnalisisISR dilakukan dengan metode split root system dilanjutkan dengananalisis kadar asam salisilat dan peroksidase. Penelitian mengunakanRancangan Acak Lengkap. Hasil penelitian menunjukkan bahwa bakteriendofit dapat menekan jumlah puru dan populasi nematoda di dalam akar.Penekanan tertinggi pada isolat MSK (97,93%) tidak berbeda nyatadengan isolat BAS, TT2, dan NJ46 yaitu 97,35; 95,22; dan 92,14%.Berdasarkan analisis split root system, ke 4 isolat tersebut dapat meng-induksi ketahanan tanaman lada secara sistemik dengan mekanismepeningkatan kandungan asam salisilat dan peroksidase di dalam akar.</p><p>Kata kunci : Bakteri endofit, penyakit kuning, Piper nigrum L.,Meloidogyne incognita, induksi ketahanan</p><p>ABSTRACT</p><p>The use of endophytic bacteria to induce plant resistanceagainst infection of root-knot nematode (Meloidogyneincognita) on black pepper</p><p>Root-knot nematode (Meloidogyne incognita) is one of important patho-gens causing yellow disease on black pepper. As a result of this pathogenattack can lower the results up to 32%. Several control methods have beendone successful to control pathogen. Biological control using endophyticbacteria is one of prospective alternative control methods to overcomenematode problem. The research had been conducted in the Laboratory ofBacteriology and Nematology Department of Plant Protection, BogorAgricultural University (IPB) and in greenhouse of Indonesian Spices andIndustrial Crops Research Institute (ISICRI) Sukabumi. The objectives ofthis study were : 1) Selection of endophytic bacteria to control M.incognita nematodes on black pepper and 2) Potential of induced systemicresistance (ISR) and analysis of salicylic acid and peroxidase. Endophyticbacterial isolates used were endophytic potential bacterial isolates isolatedfrom the roots of patchouli. Pepper plant roots were soaked in anendophytic bacterial suspension, then inoculated with 500 larvae of 2 M.incognita. A month after inoculation, the plants were dismantled andobserved population of nematodes and plant growth. ISR analysis wasperformed by the method of split root system followed by analysis ofsalicylic acid and peroxidase contents. The research was arranged usingCompletely Randomized Design. The results showed that endophyticbacteria were able to suppress the amount of gall and nematode populationin roots. The highest suppression was on MSK isolate (97.93%) which wasnot significantly different from BAS, TT2, and NJ46 isolates, namely97.35, 95.22, and 92.14%, respectively. The analysis of split root systemshowed that the 4 isolates were able to induce systemic resistance of blackpepper with a mechanism of increase in salicylic acid and peroxidasecontents in roots.</p><p>Key words : Endophytic bacteria, yellow disease, Piper nigrum L.,Meloidogyne incognita, induce systemic resistance</p>

scholarly journals Recombinant Bacillus subtilis strain deficient in production of surfactin loses ability to induce resistance of wheat plants against aphid Schizaphis graminum (Rond.)

2020 ◽  
Author(s):  
V. Yu. Alekseev ◽  
S. Veselova ◽  
D. K. Blagova ◽  
E. R. Sarvarova ◽  
G. Burkhanova ◽  
...  
Keyword(s):  
Bacillus Subtilis ◽  
Endophytic Bacteria ◽  
Schizaphis Graminum ◽  
Systemic Resistance ◽  
Subtilis Strain ◽  
Cereal Aphids ◽  
Insecticidal Effect ◽  
Induce Resistance ◽  
Recombinant Bacillus Subtilis

An important role of surfactin synthesis by endophytic bacteria in protecting wheat against cereal aphids has been shown to manifest itself in a direct insecticidal effect and an indirect effect through the induction of systemic resistance in plants.

scholarly journals Lipopeptide producing endophytic bacteria of the genus Bacillus regulate wheat resistance to cereal aphids

2020 ◽  
Author(s):  
S. V. Veselova ◽  
V. Yu. Alekseev ◽  
S.D. Rumyantsev ◽  
G.F. F. Burkhanova ◽  
E. A. Cherepanova ◽  
...  
Keyword(s):  
Indirect Effect ◽  
Endophytic Bacteria ◽  
Schizaphis Graminum ◽  
Systemic Resistance ◽  
Cereal Aphids ◽  
Genus Bacillus

We have shown the direct and indirect effect of lipopeptide-producing endophytic bacteria of the genus Bacillus on the viability of greenbug aphid Schizaphis graminum Rond. and the induction of systemic resistance in wheat plants.

Rhizosphere and endophytic bacteria for induction of systemic resistance of banana plantlets against bunchy top virus

2007 ◽  
Vol 39 (5) ◽  
pp. 1087-1098 ◽  
Author(s):  
M. Kavino ◽  
S. Harish ◽  
N. Kumar ◽  
D. Saravanakumar ◽  
T. Damodaran ◽  
...  
Keyword(s):  
Endophytic Bacteria ◽  
Systemic Resistance

Endophytes and Their Role in Phytoremediation and Biotransformation Process

2018 ◽  
pp. 238-251
Author(s):  
Aparna Baban Gunjal ◽  
Meghmala S. Waghmode ◽  
Neha N. Patil ◽  
Balasaheb P. Kapadnis
Keyword(s):  
Plant Growth ◽  
Disease Control ◽  
Endophytic Bacteria ◽  
Research Field ◽  
Systemic Resistance ◽  
Biotransformation Process ◽  
Endophytic Diazotrophic Bacteria ◽  
Graminaceous Plants ◽  
Host Tissues

This chapter discusses the endophytic bacteria and their role in agriculture. The endophytes help in the plant growth by various mechanisms and also help in disease control. The capability of colonizing internal host tissues of plant has made endophytic bacteria valuable for agriculture to improve crop performance. Various endophytic diazotrophic bacteria colonize primarily the root interior of graminaceous plants. The review also discusses the role of endophytes in phytoremediation and induced systemic resistance. Endophytes have found important role in the production of many bioactive compounds, which have various applications (e.g., antibiotics, antimicrobial compounds). The contributions of this research field will have economic and environmental impacts.

scholarly journals Insight into the Bacterial Endophytic Communities of Peach Cultivars Related to Crown Gall Disease Resistance

2019 ◽  
Vol 85 (9) ◽  
Author(s):  
Qian Li ◽  
Rongjun Guo ◽  
Yujia Li ◽  
Wyatt H. Hartman ◽  
Shifang Li ◽  
...  
Keyword(s):  
Disease Resistance ◽  
Agrobacterium Tumefaciens ◽  
Bacterial Communities ◽  
Crown Gall ◽  
Endophytic Bacteria ◽  
Fruit Trees ◽  
Resistant Cultivar ◽  
Culturable Bacteria ◽  
Content Type ◽  
Crown Gall Disease

ABSTRACTCrown gall disease caused byAgrobacterium tumefaciensseverely impacts the production of peach and other fruit trees. Several peach cultivars are partially resistant toA. tumefaciens, but little is known about the roles of endophytic microbiota in disease resistance. In the present study, the endophytic bacterial communities of resistant and susceptible peach cultivars “Honggengansutao” and “Okinawa” were analyzed using universal 16S rRNA gene amplicon sequencing in parallel with the cultivation and characterization of bacterial isolates. A total of 1,357,088 high-quality sequences representing 3,160 distinct operational taxonomic units (OTUs;Proteobacteria,Actinobacteria,Bacteroidetes, andFirmicutes) and 1,200 isolates of 20 genera and 305 distinct ribotypes were collected from peach roots and twigs. It was found that factors including plant developmental stage, cultivar, andA. tumefaciensinvasion strongly influenced the peach endophytic communities. The community diversity of endophytic bacteria and the abundance of culturable bacteria were both higher in the roots of the resistant cultivar, particularly after inoculation. Strikingly, the pathogen antagonistsStreptomycesandPseudomonasin roots andRhizobiumin twigs were most frequently detected in resistant plants. Our results suggest that the higher abundance and diversity of endophytic bacteria and increased proportions of antagonistic bacteria might contribute to the natural defense of the resistant cultivar againstA. tumefaciens. This work reveals the relationships between endophytic bacteria and disease resistance in peach plants and provides important information for microbiome-based biocontrol of crown gall disease in fruit trees.IMPORTANCEAgrobacterium tumefaciensas the causal agent of peach crown gall disease can be controlled by planting resistant cultivars. This study profiles the endophytic bacteria in susceptible and resistant peach cultivars, advancing our understanding of the relationships between endophytic bacterial communities and peach crown gall disease, with potential implications for other complex microbiome-plant-pathogen interactions. The resistant cultivar may defend itself by increasing the diversity and abundance of beneficial endophytic bacteria. The antagonists identified among the generaStreptomyces,Pseudomonas, andRhizobiummay have application potential for biocontrol of crown gall disease in fruit trees.

scholarly journals Improving resistance to salt stress by endophytic bacteria in winter rape plants

2021 ◽  
pp. 112-117
Author(s):  
Irina A. Grineva ◽  
Veronika A. Lomonosova ◽  
Diana V. Maslak ◽  
Ivan A. Russkikh ◽  
Ludmila E. Sadovskaya ◽  
...  
Keyword(s):  
Salt Stress ◽  
Survival Rate ◽  
Endophytic Bacteria ◽  
Laboratory Experiments ◽  
Systemic Resistance ◽  
Bacterial Strains ◽  
Winter Rape ◽  
Biological Preparation ◽  
Plant Shoots ◽  
Corn Grain

As a result of laboratory experiments to study the induction of systemic resistance in winter rape plants under conditions of salt stress, it was found that treatment of plants with endophytic bacterial strains 12 (isolated from corn grain), R13 (isolated from triticale roots) and 22 (isolated from rye roots) significantly increases the survival rate, length and weight of plant shoots. The selected endophytic strains are promising for the creation of a phytoprotective bacterial biological preparation on their basis.

Biohardening with Plant Growth Promoting Rhizosphere and Endophytic bacteria induces systemic resistance against Banana bunchy top virus

2008 ◽  
Vol 39 (2) ◽  
pp. 187-200 ◽  
Author(s):  
S. Harish ◽  
M. Kavino ◽  
N. Kumar ◽  
D. Saravanakumar ◽  
K. Soorianathasundaram ◽  
...  
Keyword(s):  
Plant Growth ◽  
Endophytic Bacteria ◽  
Systemic Resistance ◽  
Banana Bunchy Top Virus ◽  
Plant Growth Promoting ◽  
Growth Promoting
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