June 1, 2017 Thesis Open Access

GEBEYEHU YIBELTIE

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    <subfield code="a">THE EFFECT OF BACILLUS SPECIESS AND CYANOBACTERIA ON THE GROWTH OF PEPPER (Capsicum annuum L.), RICE (Oryza sativa L.) AND TOMATO (Lycopersicon esculentum L.) SEEDLINGS</subfield>
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    <subfield code="a">&lt;p&gt;Excessive use of agrochemical was one mechanism of increase crop production and which leads&lt;br&gt;
to environmental damage. Microorganisms are important for agriculture in order to promote the&lt;br&gt;
circulation of plant nutrients and reduce the need for chemical fertilizers. Today researchers are&lt;br&gt;
able to repeatedly use them successfully in field experiments to increase growth and yields of&lt;br&gt;
some crop and vegetables in different nations; however data on the effect of cyanobacteria on the&lt;br&gt;
growth of rice, tomato and pepper seedlings is inadequate. The aim of this study was to isolate&lt;br&gt;
and evaluate the effect of cyanobacteria on the growth of rice, tomato and pepper seedlings with&lt;br&gt;
deferent cultivars. The study designs were randomized, purposeful laboratory based experiment.&lt;br&gt;
Sediments sample used to isolate Bacillus and soil sample used to isolates Cyanobacteria were&lt;br&gt;
collected randomly from Lake Tana and from Gondar Teacher Education Collage respectively.&lt;br&gt;
The seeds of Peppers and Tomato were collected from Adet Agriculture Research Center and&lt;br&gt;
Rice seeds from Woreta Rice Research Center. The seedling of pepper, rice and tomato were&lt;br&gt;
prepared in University of Gondar, Biology department field experiment station. Pot experiments&lt;br&gt;
in laboratory were conducted to evaluate the effect of Cyanobacteria and Bacillus on Rice,&lt;br&gt;
Pepper and Tomatoes seedling. Five Bacillus and two Cyanobacteria species were isolated and&lt;br&gt;
identified from Lake Tana and from Lake Tana and from Gondar Teacher Education Collage&lt;br&gt;
respectively. All five Bacillus and tow Cyanobacterial isolates showed positive effects on the&lt;br&gt;
growth of pepper, rice and tomato seedlings as compared to the control, however their&lt;br&gt;
effectiveness varies from isolate to isolate and also from cultivar to cultivar. Among all&lt;br&gt;
Cyanobacteria isolate (C1) was considered as having more plant growth promoting ability in all&lt;br&gt;
cultivars of tomato Melkesalsa (70%, 70.4%), kochero (75%, 76%) and Miya (92.5%, 79%)&lt;br&gt;
shoot length and root length respectively relative to other. In pepper plant cv. Endiam42 from all&lt;br&gt;
isolates C1 provide more growth promotion with efficacy (80.73%,66. 72%) shoot length and&lt;br&gt;
root length respectively and in cv. Markofana B4 was showed higher efficacacy(81.5%, 73.86%)&lt;br&gt;
shoot length and root length respectively relative to other. In Rice cv. X-jigna and cv. Edget C2&lt;br&gt;
showed higher growth promotion efficacy (37.93%, 50.53%) and (50.07%, 52.9%) respectively.&lt;br&gt;
Thus, microorganisms could be considered as one of the possible biofertilizer that leads to&lt;br&gt;
increase the health and vigor of seedlings.&lt;/p&gt;</subfield>
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