Plant and fungi interaction mechanisms in endotrophic mycorrhiza

Martinčić, Jelena (2009) Plant and fungi interaction mechanisms in endotrophic mycorrhiza. Bachelor's thesis, Faculty of Science > Department of Biology.

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Abstract

Endotrophic mycorrhiza is symbiosis between fungi and plant in which fungi grow partly in the plant root. In arbuscular mycorrhiza, fungi from the genus Glomeromycota form arbuscules inside the plant root. These are treelike hyphae which role is nutrients exchange between fungi and plant. Primarily, phosphorus and nitrogen transfer to the plant is improved and photosynthetic driven carbon is transferred to the fungi. During evolution, AM „genetic program“ was the basis for other symbioses including plant root and that's the reason why nitrogen fixing bacteria utilize the same signalling pathway. However, molecular mechanisms that lead to AM are less known than those that lead to symbiosis with nitrogen fixing bacteria, so in past few years endotrophic mycorrhiza is being intensively investigated. Due to this fact, strigolactones, plant driven signal molecules inducing hyphal branching, have been discovered. Hypha driven preinfection signals (Myc factors) are discovered too, although their identity and plant receptors are not yet being defined. The plant participates actively in successful root colonization by creating prepenetration apparatus (PPA). Also, important SYM genes involved in signalling pathway have been identified: SYMRK kinase, CASTOR and POLLUX cation channels, CCaMK and CYCLOPS. It has been discovered that oscillations in calcium concentration plays an important role in establishment of this symbiotic relationship.

Item Type: Thesis (Bachelor's thesis)
Supervisor: Tkalec, Mirta
Date: 2009
Number of Pages: 15
Subjects: NATURAL SCIENCES > Biology
Divisions: Faculty of Science > Department of Biology
Depositing User: Silvana Šehić
Date Deposited: 22 Dec 2014 10:48
Last Modified: 22 Dec 2014 10:48
URI: http://digre.pmf.unizg.hr/id/eprint/3570

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