Abbasi Moghaddam, Javad (2017) Isolation and identification of phosphate solubilizing fungi with dust in Sistan Plain. Masters thesis, university of zabol.
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Abstract
Phosphorus is considered as the second most common element in plants after nitrogen. Phosphorus solubilizing fungi in addition to convert the unavailable P form to available form for plants can produce growth promoting agents which protect plants against soil pathogens. Severe storms caused by winds called 120-day winds is one of the climate events occurs especially in summer, in the Sistan region, and it cause of dust dispersal in this area. The aim of this study was to determine the microbial population of dust and isolation and identification of phosphate solubilizing fungi associated with dust in Sistan plain. For this purpose, dust samples were collected monthly from June to the end of September in 2016. The microbial population of the airborne dust was determined by using Petri dish culture method. In order to investigate of phosphorus solubilizing Microorganisms population Pikovskaya medium was used and then microbe DNA was extracted and purified, and to determine gene sequences, the samples was sent to Macrogene Institute in South Korea. The maximum average amount of airborne dust was observed in Hirmand city (916. 26 g/m2) and the minimum amount was observed in Zahak city (485. 89 g/m2). Maximum bacteria population was observed in Nimrouz city (17129250 cfu/g) and minimum bacteria population was observed in Hirmand city (4181917 cfu/g). Maximum fungi population was observed in Zahak city (11250 cfu/g) and minimum fungi population was observed in Hirmand city (3916. 66 cfu/g). Maximum phosphate solubilizing microorganisms population was observed in Zahak city (29166. 67 cfu/g) and minimum phosphate solubilizing microorganisms population was observed in Zabol city (16166. 67 cfu/g). The most common type of phosphate solubilizing fungi in this study was Aspergillus niger. The results showed that Aspergillus sydowii species had the highest percentage of phosphate solubilization (SE= 33. 33 %) and Penicillium chrysogenum species (SE= 30. 76 %) was in the second place
| Item Type: | Thesis (Masters) |
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| Uncontrolled Keywords: | Phosphorus, phosphate solubilizing fungi, 120-day winds, Hamoun wetlands |
| Subjects: | S Agriculture > S Agriculture (General) |
| Depositing User: | Mrs najmeh khajeh |
| Date Deposited: | 05 Dec 2018 06:10 |
| Last Modified: | 09 Mar 2019 06:28 |
| URI: | http://eprints.uoz.ac.ir/id/eprint/2318 |
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