@Article{biocell.2021.013907,
AUTHOR = {MUHAMMAD HAMAYUN, NASIR KHAN, MUHAMMAD NAUMAN KHAN, MUHAMMAD QADIR, ANWAR HUSSAIN, AMJAD IQBAL, SUMERA AFZAL KHAN, KHUSHNOOD UR REHMAN, IN-JUNG LEE},
TITLE = {Antimicrobial and plant growth-promoting activities of bacterial endophytes isolated from <i>Calotropis procera</i> (Ait.) W.T. Aiton},
JOURNAL = {BIOCELL},
VOLUME = {45},
YEAR = {2021},
NUMBER = {2},
PAGES = {363--369},
URL = {http://www.techscience.com/biocell/v45n2/41549},
ISSN = {1667-5746},
ABSTRACT = {Bacterial endophytes are beneficial to their hosts as they can fix nitrogen in the soil and make it available to the
host. Endophytic bacteria also secrete plant growth-promoting hormones to support their host plants under normal as
well as stress conditions. The current study aimed to isolate endophytic bacteria from different parts of <i>Calotropis
procera</i>, i.e., roots, stem and leaves of <i>Calotropis
procera</i> (Ait.) W.T. Aiton. Plants were collected from the Lundkhwar,
district Mardan. A total of 12 bacterial strains, i.e., six from roots, three from the stem and three from the leaves were
isolated. The strains were screened for their growth-promoting activity in rice plants because rice shows a quick and
easy response to the bioactive compounds present in the culture filtrate (CF) of the potent endophytic strains. The
rice plants were cultivated in pots containing 30 mL of 0.8% w/v water-agar medium. The pots were placed in a
growth chamber, operated at 28 ± 0.3°C for 14 h (day); and 25 ± 0.3°C for 10 h (night), at 70% relative-humidity.
Among the isolated strains, R1, S1, S3, L1, R5 and R6 showed visible growth promotion in rice plants. The
biochemical analysis revealed that the strains were able to produce indole acetic acid (IAA) and flavonoids in higher
quantities. Moreover, the strains also produced bioactive compounds that inhibited the growth of <i>Escherichia coli</i> and
<i>Aspergillus flavus</i> using the well diffusion method. From the results, it was concluded that these strains can secrete
potent compounds that can promote the host plant growth and inhibit the growth of pathogenic microorganisms and,
therefore, can be used as bio-fertilizer and bio-control agents.},
DOI = {10.32604/biocell.2021.013907}
}