id	author	title	date	pages	extension	mime	words	sentences	flesch	summary	cache	txt
cord-017419-yrw4wrxj	Mugford, Sam T.	Saponin Synthesis and Function	2012-08-22		.txt	text/plain	10198	640	51	Triterpenes and sterols derived from 2,3 oxidosqualene are further elaborated by oxidative and other modi fi cations, and by glycosylation, leading to the synthesis of saponins The function and synthesis of saponins in plants will be discussed in this chapter, with particular focus on triterpenoid saponins and on the oat root triterpenoid saponins known as avenacins. Further compelling evidence for a role for avenacins in plant defence came from the mutagenesis of a diploid avenacinproducing oat species ( Avena strigosa ), and the demonstration that avenacin-de fi cient mutants (isolated by screening for reduced root fl uorescence) have enhanced susceptibility to a range of soil-borne fungal pathogens including G. Examples of saponin glycosyl hydrolases have been reported from various other plant pathogenic fungi, including pathogens of oat leaves (which encounter the steroidal avenacosides) and of tomato (which encounter the steroidal glycoalkaloid a -tomatine) (Sandrock and Van Etten 1998; Morrissey and Osbourn 1999 ) (Fig. 28.1 ).	./cache/cord-017419-yrw4wrxj.txt	./txt/cord-017419-yrw4wrxj.txt