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Silicate solubilizing bacteria for improved growth of rubber and suppression of white root rot fungal pathogen Rigidoporus microporus

Silicate solubilizing bacteria (SSB) play an important role in solubilizing insoluble forms of silicates in soil. The uptake of soluble silicon can help plant to be more resistant against fungal pathogens. Bacterial strains isolated from rubber plantation were screened for solubilization of silicate...

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Main Authors: Othman, Radziah, Shabbir, Imran, Sulaiman, Zulkefly, Abd Samad, Mohd Yusoff, Wong, Mui Yun, Md Jaafar @ Ahmad Jaafar, Noraini
Format: Conference or Workshop Item
Language:English
Published: Faculty of Agriculture, Universiti Putra Malaysia 2018
Online Access:http://psasir.upm.edu.my/id/eprint/77369/1/8TH%20IAC%20%E2%80%93%206TH%20ISFA%202018-48.pdf
http://psasir.upm.edu.my/id/eprint/77369/
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spelling my.upm.eprints.773692020-03-05T06:28:39Z http://psasir.upm.edu.my/id/eprint/77369/ Silicate solubilizing bacteria for improved growth of rubber and suppression of white root rot fungal pathogen Rigidoporus microporus Othman, Radziah Shabbir, Imran Sulaiman, Zulkefly Abd Samad, Mohd Yusoff Wong, Mui Yun Md Jaafar @ Ahmad Jaafar, Noraini Silicate solubilizing bacteria (SSB) play an important role in solubilizing insoluble forms of silicates in soil. The uptake of soluble silicon can help plant to be more resistant against fungal pathogens. Bacterial strains isolated from rubber plantation were screened for solubilization of silicate. Only five bacterial isolates were capable of solubilizing silicate. These isolates were further tested for growth promotion and antagonistic activity against Rigidoporus microporus. The highest silicate (solubilizing index 4.67±0.65) was observed for SSB7 isolate. In liquid assay for silicate solubilization the highest solubilization (11.55±0.58 mg L-1) was observed for SSB7 isolate compared to the other isolates at 10 days of growth. The dual culture antagonistic assay showed that all five SSB isolates strongly inhibited the growth of R. microporus. The highest inhibition (PIRG 57.24%) was recorded for SSB7 followed by SSB10 (PIRG 45.12%). These isolates were also able solubilize phosphate, potassium, produce indole-3-acetic acid (IAA), with the highest IAA production (19.96±1.79 μg mL-1) found by SSB7 isolate. All SSB isolates were able to produce siderophore. Isolates SSB7 and SSB10 were able to secrete cellulase while only SSB7 had the ability to produce pectinase. These bacterial isolates showed the ability to improve growth of rubber seedlings and inhibit the development of white root rot disease. Faculty of Agriculture, Universiti Putra Malaysia 2018 Conference or Workshop Item PeerReviewed text en http://psasir.upm.edu.my/id/eprint/77369/1/8TH%20IAC%20%E2%80%93%206TH%20ISFA%202018-48.pdf Othman, Radziah and Shabbir, Imran and Sulaiman, Zulkefly and Abd Samad, Mohd Yusoff and Wong, Mui Yun and Md Jaafar @ Ahmad Jaafar, Noraini (2018) Silicate solubilizing bacteria for improved growth of rubber and suppression of white root rot fungal pathogen Rigidoporus microporus. In: Joint Symposium of the 8th International Agriculture Congress 2018 and 6th International Symposium for Food & Agriculture 2018 (8th IAC – 6th ISFA 2018), 13-15 Nov. 2018, Auditorium Rashdan Baba, TNCPI Building, Universiti Putra Malaysia. (pp. 234-237).
institution Universiti Putra Malaysia
building UPM Library
collection Institutional Repository
continent Asia
country Malaysia
content_provider Universiti Putra Malaysia
content_source UPM Institutional Repository
url_provider http://psasir.upm.edu.my/
language English
description Silicate solubilizing bacteria (SSB) play an important role in solubilizing insoluble forms of silicates in soil. The uptake of soluble silicon can help plant to be more resistant against fungal pathogens. Bacterial strains isolated from rubber plantation were screened for solubilization of silicate. Only five bacterial isolates were capable of solubilizing silicate. These isolates were further tested for growth promotion and antagonistic activity against Rigidoporus microporus. The highest silicate (solubilizing index 4.67±0.65) was observed for SSB7 isolate. In liquid assay for silicate solubilization the highest solubilization (11.55±0.58 mg L-1) was observed for SSB7 isolate compared to the other isolates at 10 days of growth. The dual culture antagonistic assay showed that all five SSB isolates strongly inhibited the growth of R. microporus. The highest inhibition (PIRG 57.24%) was recorded for SSB7 followed by SSB10 (PIRG 45.12%). These isolates were also able solubilize phosphate, potassium, produce indole-3-acetic acid (IAA), with the highest IAA production (19.96±1.79 μg mL-1) found by SSB7 isolate. All SSB isolates were able to produce siderophore. Isolates SSB7 and SSB10 were able to secrete cellulase while only SSB7 had the ability to produce pectinase. These bacterial isolates showed the ability to improve growth of rubber seedlings and inhibit the development of white root rot disease.
format Conference or Workshop Item
author Othman, Radziah
Shabbir, Imran
Sulaiman, Zulkefly
Abd Samad, Mohd Yusoff
Wong, Mui Yun
Md Jaafar @ Ahmad Jaafar, Noraini
spellingShingle Othman, Radziah
Shabbir, Imran
Sulaiman, Zulkefly
Abd Samad, Mohd Yusoff
Wong, Mui Yun
Md Jaafar @ Ahmad Jaafar, Noraini
Silicate solubilizing bacteria for improved growth of rubber and suppression of white root rot fungal pathogen Rigidoporus microporus
author_facet Othman, Radziah
Shabbir, Imran
Sulaiman, Zulkefly
Abd Samad, Mohd Yusoff
Wong, Mui Yun
Md Jaafar @ Ahmad Jaafar, Noraini
author_sort Othman, Radziah
title Silicate solubilizing bacteria for improved growth of rubber and suppression of white root rot fungal pathogen Rigidoporus microporus
title_short Silicate solubilizing bacteria for improved growth of rubber and suppression of white root rot fungal pathogen Rigidoporus microporus
title_full Silicate solubilizing bacteria for improved growth of rubber and suppression of white root rot fungal pathogen Rigidoporus microporus
title_fullStr Silicate solubilizing bacteria for improved growth of rubber and suppression of white root rot fungal pathogen Rigidoporus microporus
title_full_unstemmed Silicate solubilizing bacteria for improved growth of rubber and suppression of white root rot fungal pathogen Rigidoporus microporus
title_sort silicate solubilizing bacteria for improved growth of rubber and suppression of white root rot fungal pathogen rigidoporus microporus
publisher Faculty of Agriculture, Universiti Putra Malaysia
publishDate 2018
url http://psasir.upm.edu.my/id/eprint/77369/1/8TH%20IAC%20%E2%80%93%206TH%20ISFA%202018-48.pdf
http://psasir.upm.edu.my/id/eprint/77369/
_version_ 1662756652719276032
score 13.211869

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