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Abstract - Issue Sep 2012, 33 (5) Back
nstantaneous and historical temperature effects on a-pinene
Effects of saline
tolerant Azospirillum species on the growth
of Marine Science, Department of? Oceanography and Coastal? Area Studies,?
Thondi- 623 409, India.
e-mail : firstname.lastname@example.org
Thadedus Maria Ignatiammal
of Botany, Holy Cross College, Nagercoil-629 004, India
Department of Microbiology,
Selvamm Arts and Science College, Namakkal - 637 003, Tamil Nadu, ?
School of Marine
Science, Department of? Oceanography and Coastal? Area Studies, Alagappa
Thondi- 623 409, India
30? March 2011
20? August 2011
Five species of Azospirillum isolated from Manakkudi
mangrove ecosystem were subjected for their efficiency to find out their
growth parameters potential for the successful establishment of mangrove
seedlings. Of the isolated five Azospirillum species, Azospirillum
lipoferum (60%) was found to be the dominant one.? But the level of
maximum indole acetic acid (IAA) production (19.8mg.ml-1) and
nitrogen fixation (5.9 C2H2hr-1) was identified
with A. brasilense. Further, A. brasilense showed significant (p<0.05)
level of increased growth parameters [maximum root length (29.55%), average
root length (7.39%), total Chl (55.36%), carrotenoids (28.57%), Chl b
(37.50%), carbohydrates (90.91%) and total amino acids (78.95%)] in Avicennia
officinals when compared with control group. ?Further, A. brasilense
also showed significant (p<0.05) level of increased growth
parameters [average number of primary roots (40%), average biomass (44.44%),
average shoot biomass (55.56%), total Chl (20%), Chl b (77.78%) and
carotenoid (1.54%)] in C. decandra seedlings when compared with
control group. Similarly, the average number of primary roots
(23.08%), average root biomass (15.52%), average shoot biomass (15.30%),
carbohydrate (20%) and total amino acids (44.44%) were found significant (p<0.05)
in A. irakense inoculated R. apiculata seedlings.
In conclusion, Azospirillum brasilense was found better for the
growth of Avicennia officinalis and Ceriops decandra seedlings,
but Azospirillum irakense was found better for Rhizophora
Azospirillum, Indole acetic acid,
Mangroves, Nitrogen fixation????
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