Authors:
Fathin Rasima Daulay, Roby Ibnu Syarifain, Natabella Julie Hasty, Fachri Dio Pamungkas, Mieke Rochimi Setiawati, Kustiwa Adinata and Tualar Simarmata ,Indonesia |
Abstract:
Salinity affects the water potential in plants and causes a devastating effect on rice growth and
lead to a significant rice yield loss. The research was done to screen the halotolerant of N-fixer
bacteria from saline ecosystem which capable to form the biofilm attached to roots system. Five
of composite soil samples were taken from plant rhizospheres of saline ecosystems and resulted
15 bacterial isolates. Seven isolates which capable to form a biofilm were selected for bioassay
using the rice seedling on salinized growing media. The experiments was arranged as
randomized block design, consisted 8 treatments and provide with 3 replications. Rice seedlings
were grown on salinized Fahraeus Gmedia (4 dS m-1) for 21 days on green house. The
observed responds were included plant height, root length and dry weight. The experimental
results showed that the bacterial isolates gave a significant effect on plant height, dry weight
roots and total biomass. The highest plant height and total biomass were by the Isolates of C33
and E52 were 7.93 cm and 7.56 mg. The root was increased by 38, 20, and 20 %, respectively
and total biomass was increased by 41, 39, and 64 %, respectively This finding concludes these
promising bacterial isolate of salt tolerant biofilmed N-fixers could develop as bioagent to
alleviate the salinity stress to improve the rice growth on saline lowland rice fields |
