Mucoraceous fungi

Compounds such as trisporic acids serve as pheromonal substances in the reproduction of fungi of the order Mucor-ales (Zygomycetes) (Fig. 26.17). The principal genera involved are Mucor, Phycomyces, and Blakeslea (Mascaren-has, 1978). The same pheromones apparently initiate sexual development in all mucoraceous fungi furthermore, this process appears to be more complex than originally envisioned (Jaenicke, 1991 Miller and Sutter, 1984 Sutter and Whitaker, 1981). 

Abscisic aoid is primarily a plant growth inhibitor. Besides its involvement in abscission, it is involved in other physiological actions such as the dormancy of seeds and ion uptake by roots. It is formed biosynthetically from mevalonate, and whereas it could arise by fragmentation of carotenoids-, the intermediates have not been established. It lias not yet been reported as a microbial product, but this probably merely reflects that it has not been looked for. Mucoraceous fungi, which are common in soils, can... 

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