Modification of Secondary Metabolism and Flavonoid Biosynthesis Under Phosphate Deficiency in Bean Roots

Autor:	Marco Russo, Eligio Malusa, Adalgisa Belligno, Chiara Mozzetti
Rok vydání:	2006
Předmět:	Chalcone isomerase Naringenin Physiology Chemistry Daidzein bean L-phenylalanine ammonia-lyase food and beverages Phenylalanine ammonia-lyase Phosphate chemistry.chemical_compound Flavonoid biosynthesis Biochemistry Secondary metabolism Agronomy and Crop Science Plant nutrition
Zdroj:	Journal of Plant Nutrition. 29:245-258
ISSN:	1532-4087 0190-4167
DOI:	10.1080/01904160500474090
Popis:	The objective of this study was to evaluate the influence of phosphate deficiency on enzymatic activities and on compounds of the secondary metabolism linked with the production of root exudates in bean (Phaseolus vulgaris L.) plants cv. 'Bianco di Bagnasco.' Phosphate deficiency induced a decrease in root total soluble phenolic content, but also caused an increase in total soluble phenolic content of exudates. Alteration of phenolic production was paralleled by increased activity of L-phenylalanine ammonia-lyase (PAL) and decreased activity of chalcone isomerase (CHI) in roots. Two isoflavonoids daidzein and naringenin, have been detected in roots; they are considered signal molecules in the chemical trafficking with soil microorganisms. Naringenin content was reduced by phosphorus (P) deficiency, due to lower activity of CHI, the enzyme responsible for its biosynthesis. On the other hand, daidzein content was higher in -P plants than in the control. The results are discussed, considering the possible roles of phenolics and flavonoids in plant-soil microbe interactions and rizosphere modification.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_dedup___::54a45b5b3b243b0d8872ece468f2b4b7 https://doi.org/10.1080/01904160500474090 Zobrazit plný text záznamu