l-tryptophan-assisted PGPR-mediated induction of drought tolerance in maize (Zea mays L.)
Drought is an important abiotic stress that limits the plant growth and productivity. Present investigation was aimed that plant growth-promoting rhizobacteria (PGPR) isolated from moisture-stressed area impart drought tolerance in plants and tryptophan may improve their efficiency. Pseudomonas sp....
| Main Authors: | , , , , |
|---|---|
| Format: | Article |
| Language: | English |
| Published: |
Taylor & Francis Group
2017-01-01
|
| Series: | Journal of Plant Interactions |
| Subjects: | |
| Online Access: | http://dx.doi.org/10.1080/17429145.2017.1402212 |
| _version_ | 1818338312477212672 |
|---|---|
| author | Humaira Yasmin Asia Nosheen Rabia Naz Asghari Bano Rumana Keyani |
| author_facet | Humaira Yasmin Asia Nosheen Rabia Naz Asghari Bano Rumana Keyani |
| author_sort | Humaira Yasmin |
| collection | DOAJ |
| description | Drought is an important abiotic stress that limits the plant growth and productivity. Present investigation was aimed that plant growth-promoting rhizobacteria (PGPR) isolated from moisture-stressed area impart drought tolerance in plants and tryptophan may improve their efficiency. Pseudomonas sp. (1), Bacillus cereus and Bacillus pumilus (B. pumilus) were isolated from maize rhizosphere grown in irrigated fields, semi-arid region and arid region, respectively. Proteus sp. and Pseudomonas sp. (2) were isolated from rice rhizosphere grown in irrigated fields and raised bed. B. pumilus produced 5× more abscisic acid (ABA) in culture media than Pseudomonas sp. (1) by the addition of l-tryptophan. These inoculants also modulated the phytohormone content of maize leaves in a pot experiment. Higher ABA was produced by the application of B. pumilus and Pseudomonas sp. (2), while indole 3-acetic acid and gibberellic acid were found higher in Pseudomonas sp. (1) and Proteus sp. treated plants. Addition of l-tryptophan increased the concentration of all phytohormones in soil and leaves of maize. Maximum increase in relative water content, osmotic potential, protein content and photosynthetic pigments was recorded in B. pumilus treated maize plants. Under irrigated condition, response of Pseudomonas sp. co-inoculated with B. pumilus from arid field superseded while under drought stress the effect of later predominated. Bacillus pumilus can be used in the formulation of biofertilizer to alleviate drought stress in arid and semi-arid regions. |
| first_indexed | 2024-12-13T15:09:07Z |
| format | Article |
| id | doaj.art-304987cd93d84f66aea783a6ec7b6fd9 |
| institution | Directory Open Access Journal |
| issn | 1742-9145 1742-9153 |
| language | English |
| last_indexed | 2024-12-13T15:09:07Z |
| publishDate | 2017-01-01 |
| publisher | Taylor & Francis Group |
| record_format | Article |
| series | Journal of Plant Interactions |
| spelling | doaj.art-304987cd93d84f66aea783a6ec7b6fd92022-12-21T23:40:56ZengTaylor & Francis GroupJournal of Plant Interactions1742-91451742-91532017-01-0112156757810.1080/17429145.2017.14022121402212l-tryptophan-assisted PGPR-mediated induction of drought tolerance in maize (Zea mays L.)Humaira Yasmin0Asia Nosheen1Rabia Naz2Asghari Bano3Rumana Keyani4COMSATS Institute of Information TechnologyCOMSATS Institute of Information TechnologyCOMSATS Institute of Information TechnologyUniversity of WahCOMSATS Institute of Information TechnologyDrought is an important abiotic stress that limits the plant growth and productivity. Present investigation was aimed that plant growth-promoting rhizobacteria (PGPR) isolated from moisture-stressed area impart drought tolerance in plants and tryptophan may improve their efficiency. Pseudomonas sp. (1), Bacillus cereus and Bacillus pumilus (B. pumilus) were isolated from maize rhizosphere grown in irrigated fields, semi-arid region and arid region, respectively. Proteus sp. and Pseudomonas sp. (2) were isolated from rice rhizosphere grown in irrigated fields and raised bed. B. pumilus produced 5× more abscisic acid (ABA) in culture media than Pseudomonas sp. (1) by the addition of l-tryptophan. These inoculants also modulated the phytohormone content of maize leaves in a pot experiment. Higher ABA was produced by the application of B. pumilus and Pseudomonas sp. (2), while indole 3-acetic acid and gibberellic acid were found higher in Pseudomonas sp. (1) and Proteus sp. treated plants. Addition of l-tryptophan increased the concentration of all phytohormones in soil and leaves of maize. Maximum increase in relative water content, osmotic potential, protein content and photosynthetic pigments was recorded in B. pumilus treated maize plants. Under irrigated condition, response of Pseudomonas sp. co-inoculated with B. pumilus from arid field superseded while under drought stress the effect of later predominated. Bacillus pumilus can be used in the formulation of biofertilizer to alleviate drought stress in arid and semi-arid regions.http://dx.doi.org/10.1080/17429145.2017.1402212DroughtPGPRl-tryptophansoil hormonesIAAABABacillus pumilus |
| spellingShingle | Humaira Yasmin Asia Nosheen Rabia Naz Asghari Bano Rumana Keyani l-tryptophan-assisted PGPR-mediated induction of drought tolerance in maize (Zea mays L.) Journal of Plant Interactions Drought PGPR l-tryptophan soil hormones IAA ABA Bacillus pumilus |
| title | l-tryptophan-assisted PGPR-mediated induction of drought tolerance in maize (Zea mays L.) |
| title_full | l-tryptophan-assisted PGPR-mediated induction of drought tolerance in maize (Zea mays L.) |
| title_fullStr | l-tryptophan-assisted PGPR-mediated induction of drought tolerance in maize (Zea mays L.) |
| title_full_unstemmed | l-tryptophan-assisted PGPR-mediated induction of drought tolerance in maize (Zea mays L.) |
| title_short | l-tryptophan-assisted PGPR-mediated induction of drought tolerance in maize (Zea mays L.) |
| title_sort | l tryptophan assisted pgpr mediated induction of drought tolerance in maize zea mays l |
| topic | Drought PGPR l-tryptophan soil hormones IAA ABA Bacillus pumilus |
| url | http://dx.doi.org/10.1080/17429145.2017.1402212 |
| work_keys_str_mv | AT humairayasmin ltryptophanassistedpgprmediatedinductionofdroughttoleranceinmaizezeamaysl AT asianosheen ltryptophanassistedpgprmediatedinductionofdroughttoleranceinmaizezeamaysl AT rabianaz ltryptophanassistedpgprmediatedinductionofdroughttoleranceinmaizezeamaysl AT asgharibano ltryptophanassistedpgprmediatedinductionofdroughttoleranceinmaizezeamaysl AT rumanakeyani ltryptophanassistedpgprmediatedinductionofdroughttoleranceinmaizezeamaysl |