BIOL 1050 Lecture Notes - Lecture 22: The Plant Cell, Root Nodule, Leghemoglobin

• School: University of Guelph
• Department: Biology
• Course: BIOL 1050
• Professor: multiple

Document Summary

Types of mutualistic associations: resource exchange, legume-rhizobia, carbohydrates for fixed nitrogen (can induce root nodule formation and fix nitrogen in symbiosis with host legumes) To stay anerobic, the protein leghaemoglobin works like hemoglobin that shuttles o2 from cytosol to the bateroid. *this costs 16 atp to reduce 1 n2 2. 57g of carcon per n fixed: plant-mycorrhizal relations (root association where some free fungi will associate with the root, carbohydrates for phosphate, water. Does cost 5-10% of the fixed carbon is used in this system, it"s (cid:374)ot host (cid:894)spe(cid:272)ies(cid:895) spe(cid:272)ifi(cid:272), the fu(cid:374)gus (cid:272)a(cid:374)"t attach to any plant around its area. Festuca, lolium endophyte: grows between cells of above ground tissue, plant-endophyte is beneficial, some are insect tolerant, better vigor (better tolerance to diseases & drought) Lolines: vasoconstrictive properties (constricted blood vessels, elevate body temperature, gangrene in the rear hooves and tail tip, extremities start dying off. Interfere with prolactin secretion: & temperature regulation, reduces feed intake.