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Publication Type J
Authors Ravikumar, S., S. T. M. Ignatiammal, M. Gnanadesigan and A. Kalaiarasi
Title Effects of saline tolerant Azospirillum species on the growth parameters of mangrove seedlings
Source Journal of Environmental Biology
Author Keywords Azospirillum Indole acetic acid Mangroves Nitrogen fixation nitrogen quantification rhizosphere substances management matter yield root
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 C(2)H(2)hr(-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.
Author Address [Ravikumar, S.; Kalaiarasi, A.] Alagappa Univ, Dept Oceanog & Coastal Area Studies, Sch Marine Sci, Thondi 623409, India. [Ignatiammal, S. Thadedus Maria] Coll Holy Cross, Dept Bot, Nagercoil 629004, India. [Gnanadesigan, M.] Selvamm Arts & Sci Coll, Dept Microbiol, Namakkal 637003, Tamil Nadu, India. Ravikumar, S (reprint author), Alagappa Univ, Dept Oceanog & Coastal Area Studies, Sch Marine Sci, Thondi 623409, India. ravibiotech201321@gmail.com
ISSN 0254-8704
ISBN 0254-8704
29-Character Source Abbreviation J.Environ.Biol.
Publication Date Sep
Year Published 2012
Volume 33
Issue 5
Beginning Page 933-939
Unique Article Identifier WOS:000308280200016
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