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Effects of saline tolerant Azospirillum species on the growth parameters of mangrove seedlings.
J Environ Biol ; 2012 Sept; 33(5): 933-939
Article in English | IMSEAR | ID: sea-148452
ABSTRACT
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 apiculata seedlings.

Full text: Available Index: IMSEAR (South-East Asia) Language: English Journal: J Environ Biol Year: 2012 Type: Article

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Full text: Available Index: IMSEAR (South-East Asia) Language: English Journal: J Environ Biol Year: 2012 Type: Article