ISSN 2756-3251
Advanced Journal of Environmental Science and Technology ISSN 7675-1686 Vol. 11 (3), pp. 001-004, March, 2020. © International Scholars Journals
Full Length Research Paper
Survey of bacterial pathogens on leaves and seeds of red mangrove (Rhizophora mangle)
Ukoima, H. N.1*, Wemedo, S. A.2 and Ekpirikpo, A. O.1
1Department of Forestry and Environment, Faculty of Agriculture.
2Department of Applied and Environmental Biology, Faculty of Sciences. Rivers State University of Science and Technology, Nkpolu-Oroworukwo, P. M. B.5080, Port-Harcourt, Nigeria.
Accepted 14 May, 2019
Abstract
Bacterial pathogens of red mangrove (Rhizophora mangle) were investigated. 50 samples each of leaves and seeds (healthy and diseased) were randomly collected and used for the analysis. Mean bacterial counts obtained were: healthy and diseased leaves; 8.26 x 103 and 5.9 l x l03 cfu/ml respectively; healthy seeds 7.96 x l03 cfu/ml and diseased seeds 1.1 4x 104 cfu/ml. The bacterial populations of the healthy and diseased leaves and seeds showed no significant difference at P > 0.05 (F – cal = 4.69; F – tab = 4.76). Nine bacterial genera isolated include Acinetobacter (7.69%), Aerococcus and Alcaligenes (3.84%), Bacillus (19.23%), Corynebacterium (34.61%), Flavobacterium and Pseudomonas (3.84%), Staphylococcus (7.69%) and Streptomyces (15.38%). Corynebacterium had the highest percentage occurrence and was isolated from both healthy and diseased samples. Some of the bacterial species such Corynebacterium, Bacillus, Pseudomonas are known pathogens of plants and were implicated as pathogens of red mangrove.
Key word: Bacterial pathogens, red mangrove, diseased leaves, healthy leaves.