scholarly journals Biocontrol and Plant-Growth-Promoting Traits of Talaromyces apiculatus and Clonostachys rosea Consortium against Ganoderma Basal Stem Rot Disease of Oil Palm

2020 ◽  
Vol 8 (8) ◽  
pp. 1138
Author(s):  
Yit Kheng Goh ◽  
Nurul Fadhilah Marzuki ◽  
Tuan Nur Fatihah Tuan Pa ◽  
Teik-Khiang Goh ◽  
Zeng Seng Kee ◽  
...  
Keyword(s):  
Plant Growth ◽  
Oil Palm ◽  
Biocontrol Agents ◽  
Stem Rot ◽  
Effective Control ◽  
Post Inoculation ◽  
Clonostachys Rosea ◽  
Basal Stem Rot ◽  
Plant Growth Promoting ◽  
Growth Promoting

Basal stem rot (BSR) disease caused by Ganoderma boninense basidiomycetous fungus is the most economically important disease in oil palms in South East Asia. Unfortunately, there is no single most effective control measure available. Tremendous efforts have been directed in incorporation of environmentally friendly biocontrol approaches in minimizing BSR disease. This study investigated the performance of two potential biocontrol agents (BCAs), AAT0115 and AAB0114 strains recovered from oil palm on suppression of BSR in planta, and also assessed their plant-growth-promoting (PGP) performance. ITS rRNA-sequence phylogeny discriminated the two ascomycetous Talaromyces apiculatus (Ta) AT0115 and Clonostachys rosea (Cr) AAB0114 biocontrol species with PGP characteristics. In vitro studies have demonstrated both Ta and Cr are capable of reducing linear mycelial growth of G. boninense. Inoculation of individual Cr and Ta—as well as Cr+Ta consortium—induced a significant increment in leaf area and bole girth of oil-palm seedlings five months post-inoculation (MPI) under nursery conditions. At five months post-inoculation, shoot and root biomass, and nutrient contents (nitrogen, phosphorus, potassium, calcium, magnesium and boron) were significantly higher in Ta-inoculated seedlings compared to control treated with non-Ta-inoculated maize. Chlorophyll and carotenoids contents in rapidly growing oil-palm seedlings challenged with Cr, Ta or a combination of both were not negatively affected. Cr, Ta and Cr+Ta consortium treated seedlings had 4.9–60% BSR disease reduction compared to the untreated control. Co-inoculation of Cr and Ta resulted in increased BSR control efficiencies by 18–26% (compared with Cr only) and 48–55% (compared with Ta only). Collectively, Cr and Ta, either individually or in consortium showed potential as BSR biocontrol agents while also possess PGP traits in oil palm.

scholarly journals Penapisan isolat rizobakteri indigenos untuk pengendalian (Ganoderma boninense) di pre nursery kelapa sawit (Elaeis guineensis Jacq.)

Jurnal Agro ◽  
10.15575/4665 ◽  
2019 ◽  
Vol 6 (2) ◽  
pp. 110-122
Author(s):  
Yulmira Yanti ◽  
Imam Rifai ◽  
Yogie Aditya Pratama ◽  
Muhammad Ihsan Harahap
Keyword(s):  
Plant Growth ◽  
Oil Palm ◽  
Control Plant ◽  
Stem Rot ◽  
In Planta ◽  
Basal Stem Rot ◽  
Plant Growth Promoting ◽  
Growth Promoting ◽  
And Control

Rizobakteri merupakan kelompok bakteri yang aktif mengkolonisasi akar tanaman, meningkatkan pertumbuhan dan mengendalikan patogen tanaman. Penelitian ini bertujuan untuk memperoleh isolat rizobakteri indigenous  terbaik dalam meningkatkan pertumbuhan kelapa sawit dan mengendalikan penyakit busuk pangkal batang di pre-nursery kelapa sawit secara in planta serta karakterisasi kemampuan antagonisnya secara in vitro. Penelitian bersifat eksperimental terdiri atas 3 tahap dengan menggunakan Rancangan Acak Lengkap (RAL): (1) Isolasi dan karakterisasi isolat rizobakteri indigenous  di Kabupaten Pasaman Barat, (2) Pengujian isolat rizobakteri indigenous  (RBI) sebagai plant growth promoting rihzobacteria (PGPR), dan untuk pengendalian G.boninense di pre-nursery kelapa sawit terdiri dari 29 perlakuan (27 isolat RBI, tanpa inokulasi G. boninense sebagai kontrol positif, dan inokulasi G. boninense sebagai kontrol negatif) dengan masing-masing 5 ulangan, serta (3) Pengujian aktivitas antagonisme isolat RBI terhadap G. boninense. Data dianalisis dengan sidik ragam, apabila berbeda nyata dilanjutkan dengan uji Least Significance Different (LSD) pada taraf 5%. Hasil penelitian menunjukkan diperoleh tiga isolat terbaik (R10 2.2, R9 2.1, dan R10 2.3) yang mampu meningkatkan pertumbuhan kelapa sawit dan menekan perkembangan penyakit busuk pangkal batang G.boninense secara in planta dan in vitro.ABSTRACTRhizobacteria is a group of bacteria that actively colonize plant roots, increase growth and control plant pathogen. The objective of the research was to obtain indigenous rhizobacteria isolate (RBI) to increase growth and control basal stem rot on oil palm seedlings in in planta and characterize of antagonistic ability in in vitro. Experimental research consisted of 3 stages by using Completely Randomized Design (CRD): (1) Isolation of indigenous rhizobacteria in West Pasaman region, (2) Indigenous rhizobacteria isolate testing as a plant growth promoting rhizobacteria (PGPR) and to control of G. boninense on pre nursery of oil palm consisted of 29 treatments (27 RBI isolates, without G. boninense inoculation as positive control, and G. boninense inoculation as negative control) with 5 replications each. (3) Testing of RBI isolate antagonism activity towards G. boninense. Data were analyzed by variance, if the result significantly different, it was continued by using Least Significance Different (LSD) at 5% level. The results showed that best three isolates (R10 2.2, R9 2.1 and R10 2.3) were able to increase growth of palm oil and to suppress the development of G.boninense basal stem rot in in planta and in in vitro.

scholarly journals Phytobacter palmae sp. nov., a novel endophytic, N2 fixing, plant growth promoting Gammaproteobacterium isolated from oil palm (Elaeis guineensis Jacq.)

2020 ◽  
Vol 70 (2) ◽  
pp. 841-848 ◽  
Author(s):  
Munusamy Madhaiyan ◽  
Venkatakrishnan Sivaraj Saravanan ◽  
Jochen Blom ◽  
Theo H. M. Smits ◽  
Fabio Rezzonico ◽  
...  
Keyword(s):  
Plant Growth ◽  
Oil Palm ◽  
Elaeis Guineensis ◽  
Plant Growth Promoting ◽  
Growth Promoting ◽  
Elaeis Guineensis Jacq

scholarly journals PROSPECTING CYANOBACTERIA-FORTIFIED COMPOSTS AS PLANT GROWTH PROMOTING AND BIOCONTROL AGENTS IN COTTON

2014 ◽  
Vol 51 (1) ◽  
pp. 42-65 ◽  
Author(s):  
RADHA PRASANNA ◽  
SANTOSH BABU ◽  
NGANGOM BIDYARANI ◽  
ARUN KUMAR ◽  
SODIMALLA TRIVENI ◽  
...  
Keyword(s):  
Plant Growth ◽  
Management Strategies ◽  
Hydrolytic Enzymes ◽  
Biocontrol Agents ◽  
Fresh Weight ◽  
Available Nitrogen ◽  
Cotton Crop ◽  
Plant Growth Promoting ◽  
Growth Promoting ◽  
Increased Activity

SUMMARYThe potential of cyanobacteria-based compost formulations was evaluated in cotton crop at two agro-ecological locations (Nagpur and Sirsa) as plant growth promoting (PGP) and biocontrol agents. Compost-based formulations fortified withCalothrixsp. orAnabaenasp. enhanced germination and fresh weight of plants, and microbiological activity by 10–15%, besides increased available nitrogen (by 20–50%) in soil at Nagpur. In the fungi-infected fields at Sirsa,Anabaena–T. viridebiofilmed formulation performed the best, recording 11.1% lower plant mortality than commercialTrichodermaformulation. Scanning electron microscopy confirmed the colonisation of inoculated cyanobacteria/biofilms on roots. Significant correlation between mortality, increased activity of hydrolytic enzymes and fresh weight of plant roots were recorded.Calothrixsp. andAnabaenasp. proved promising as both PGP and biocontrol agents, while biofilmed formulations substantially reduced mortality of cotton plants in sick plots. This study illustrates the promise of cyanobacteria as viable inoculation option for integrated nutrient and pest management strategies of cotton.

scholarly journals Selecting the most effective plant growth-promoting bacteria from oil palm (Elaeis guineensis Jacq) roots

2019 ◽  
Vol 17 (3) ◽  
pp. 344-348
Author(s):  
FAA Zakry ◽  
P. Ammal ◽  
M. Malahubban ◽  
A. R. Faridah ◽  
A.H.M. Umar
Keyword(s):  
Plant Growth ◽  
Oil Palm ◽  
Elaeis Guineensis ◽  
Growth Promotion ◽  
Test Plant ◽  
Plant Growth Promoting Bacteria ◽  
Pantoea Ananatis ◽  
Significant Difference ◽  
Plant Growth Promoting ◽  
Growth Promoting

A total of 30 bacterial isolates were isolated from soil, rhizoplane, and internal tissue of oil palm roots. The isolates were qualitatively tested for their potential to fix N2, solubilize inorganic P and K, and produce phytohormone indole-3-acetic acid. Of the 30 isolates, six isolates were able to exhibit multiple beneficial traits. All six isolates were then identified based on fatty acid methyl esters profile as Escherichia coli strain EX2, Serratia sp. strain EN1, Pantoea ananatis strain EN3, Bacillus sp. strain EN5, Pantoea ananatis strain EN8 and Pantoea sp. strain EN9. Subsequently, all shortlisted isolates were evaluated for plant growth-promoting potential by using shallot as a test plant. The plant test showed no significant difference (p>0.05) between inoculated and uninoculated plants except for Pantoea sp. strain EN9 inoculation which increased significantly (p<0.05) total root length over uninoculated control. Host specificity and IAA capacity of the isolates may be among the important factors affecting their effectiveness in plant growth promotion. J Bangladesh Agril Univ 17(3): 344–348, 2019

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