Variable responses on early development of shallot (Allium ascalonicum) and mustard (Brassica juncea) plants to Bacillus cereus inoculation
Aim: Auxin, a phytohormone secreted by plant growth-promoting rhizobacteria is one of the direct mechanisms vital for plant growth promotion. A laboratory experiment was conducted to observe the effect of IAA-producing and non-IAA-producing diazotroph Bacillus cereus strains on early growth of shall...
| Main Authors: | , , , |
|---|---|
| Format: | Article |
| Language: | English |
| Published: |
Malaysian Society for Microbiology
2012
|
| Online Access: | http://psasir.upm.edu.my/id/eprint/63947/ http://psasir.upm.edu.my/id/eprint/63947/1/Variable%20responses%20on%20early%20development%20of%20shallot%20%28Allium%20ascalonicum%29%20and%20mustard%20%28Brassica%20juncea%29%20plants%20to%20Bacillus%20cereus%20inoculation.pdf |
| _version_ | 1848854866877743104 |
|---|---|
| author | Ab. Aziz, Zakry Fitri Mohd Saud, Halimi Abdul Rahim, Khairuddin Ahmed, Osumanu Haruna |
| author_facet | Ab. Aziz, Zakry Fitri Mohd Saud, Halimi Abdul Rahim, Khairuddin Ahmed, Osumanu Haruna |
| author_sort | Ab. Aziz, Zakry Fitri |
| building | UPM Institutional Repository |
| collection | Online Access |
| description | Aim: Auxin, a phytohormone secreted by plant growth-promoting rhizobacteria is one of the direct mechanisms vital for plant growth promotion. A laboratory experiment was conducted to observe the effect of IAA-producing and non-IAA-producing diazotroph Bacillus cereus strains on early growth of shallot (Allium ascalonicum) and mustard (Brassica juncea) plants.
Methodology and Results: Treatments evaluated were as follows: Control = uninoculated, no inoculation, UPMLH1 = IAA-producing B. cereus UPMLH1, and UPMLH24 = non-IAA-producing B. cereus UPMLH24. Inoculation with IAA-producing B. cereus UPMLH1 significantly increased shallot adventitious roots (root number and length) and shoot growth (19 to 54% increment). Inoculation of non-IAA-producing B. cereus UPMLH24 did not significantly improve growth of adventitious roots of shallot as compared to uninoculated control, except its shoot (up to 40% increase). However, primary roots and shoot growth of mustard plants significantly increased through inoculation with IAA-producing and non-IAA-producing strains (14 to 73% increment).
Conclusion, Significance and Impact of Study: The results indicated that exogenous IAA secreted by B. cereus UPMLH1 might have play an important role in inducing roots of shallot bulbs and it may have a variable promotional effect depending on plant species. |
| first_indexed | 2025-11-15T11:16:41Z |
| format | Article |
| id | upm-63947 |
| institution | Universiti Putra Malaysia |
| institution_category | Local University |
| language | English |
| last_indexed | 2025-11-15T11:16:41Z |
| publishDate | 2012 |
| publisher | Malaysian Society for Microbiology |
| recordtype | eprints |
| repository_type | Digital Repository |
| spelling | upm-639472018-06-08T00:25:26Z http://psasir.upm.edu.my/id/eprint/63947/ Variable responses on early development of shallot (Allium ascalonicum) and mustard (Brassica juncea) plants to Bacillus cereus inoculation Ab. Aziz, Zakry Fitri Mohd Saud, Halimi Abdul Rahim, Khairuddin Ahmed, Osumanu Haruna Aim: Auxin, a phytohormone secreted by plant growth-promoting rhizobacteria is one of the direct mechanisms vital for plant growth promotion. A laboratory experiment was conducted to observe the effect of IAA-producing and non-IAA-producing diazotroph Bacillus cereus strains on early growth of shallot (Allium ascalonicum) and mustard (Brassica juncea) plants. Methodology and Results: Treatments evaluated were as follows: Control = uninoculated, no inoculation, UPMLH1 = IAA-producing B. cereus UPMLH1, and UPMLH24 = non-IAA-producing B. cereus UPMLH24. Inoculation with IAA-producing B. cereus UPMLH1 significantly increased shallot adventitious roots (root number and length) and shoot growth (19 to 54% increment). Inoculation of non-IAA-producing B. cereus UPMLH24 did not significantly improve growth of adventitious roots of shallot as compared to uninoculated control, except its shoot (up to 40% increase). However, primary roots and shoot growth of mustard plants significantly increased through inoculation with IAA-producing and non-IAA-producing strains (14 to 73% increment). Conclusion, Significance and Impact of Study: The results indicated that exogenous IAA secreted by B. cereus UPMLH1 might have play an important role in inducing roots of shallot bulbs and it may have a variable promotional effect depending on plant species. Malaysian Society for Microbiology 2012 Article PeerReviewed text en http://psasir.upm.edu.my/id/eprint/63947/1/Variable%20responses%20on%20early%20development%20of%20shallot%20%28Allium%20ascalonicum%29%20and%20mustard%20%28Brassica%20juncea%29%20plants%20to%20Bacillus%20cereus%20inoculation.pdf Ab. Aziz, Zakry Fitri and Mohd Saud, Halimi and Abdul Rahim, Khairuddin and Ahmed, Osumanu Haruna (2012) Variable responses on early development of shallot (Allium ascalonicum) and mustard (Brassica juncea) plants to Bacillus cereus inoculation. Malaysian Journal of Microbiology, 8 (1). pp. 47-50. ISSN 1823-8262; ESSN: 2231-7538 http://mjm.usm.my/index.php?r=cms/entry/view&id=51 10.21161/mjm.33711 |
| spellingShingle | Ab. Aziz, Zakry Fitri Mohd Saud, Halimi Abdul Rahim, Khairuddin Ahmed, Osumanu Haruna Variable responses on early development of shallot (Allium ascalonicum) and mustard (Brassica juncea) plants to Bacillus cereus inoculation |
| title | Variable responses on early development of shallot (Allium ascalonicum) and mustard (Brassica juncea) plants to Bacillus cereus inoculation |
| title_full | Variable responses on early development of shallot (Allium ascalonicum) and mustard (Brassica juncea) plants to Bacillus cereus inoculation |
| title_fullStr | Variable responses on early development of shallot (Allium ascalonicum) and mustard (Brassica juncea) plants to Bacillus cereus inoculation |
| title_full_unstemmed | Variable responses on early development of shallot (Allium ascalonicum) and mustard (Brassica juncea) plants to Bacillus cereus inoculation |
| title_short | Variable responses on early development of shallot (Allium ascalonicum) and mustard (Brassica juncea) plants to Bacillus cereus inoculation |
| title_sort | variable responses on early development of shallot (allium ascalonicum) and mustard (brassica juncea) plants to bacillus cereus inoculation |
| url | http://psasir.upm.edu.my/id/eprint/63947/ http://psasir.upm.edu.my/id/eprint/63947/ http://psasir.upm.edu.my/id/eprint/63947/ http://psasir.upm.edu.my/id/eprint/63947/1/Variable%20responses%20on%20early%20development%20of%20shallot%20%28Allium%20ascalonicum%29%20and%20mustard%20%28Brassica%20juncea%29%20plants%20to%20Bacillus%20cereus%20inoculation.pdf |