NDLI: Isoflavonoid exudation from white lupin roots is influenced by phosphate supply, root type and cluster‐root stage

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Isoflavonoid exudation from white lupin roots is influenced by phosphate supply, root type and cluster‐root stage

Content Provider	Scilit
Author	Weisskopf, Laure Tomasi, Nicola Santelia, Diana Martinoia, Enrico Langlade, Nicolas Tabacchi, Raffaele Mansour, Eliane Abou
Copyright Year	2006
Description	Journal: New Phytologist The internal concentration of isoflavonoids in white lupin (Lupinus albus) cluster roots and the exudation of isoflavonoids by these roots were investigated with respect to the effects of phosphorus (P) supply, root type and cluster-root developmental stage. To identify and quantify the major isoflavonoids exuded by white lupin roots, we used high-pressure liquid chromatography (HPLC) coupled to electrospray ionization (ESI) in mass spectrometry (MS). The major exuded isoflavonoids were identified as genistein and hydroxygenistein and their corresponding mono- and diglucoside conjugates. Exudation of isoflavonoids during the incubation period used was higher in P-deficient than in P-sufficient plants and higher in cluster roots than in noncluster roots. The peak of exudation occurred in juvenile and immature cluster roots, while exudation decreased in mature cluster roots. Cluster-root exudation activity was characterized by a burst of isoflavonoids at the stage preceding the peak of organic acid exudation. The potential involvement of ATP-citrate lyase in controlling citrate and isoflavonoid exudation is discussed, as well as the possible impact of phenolics in repelling rhizosphere microbial citrate consumers
Related Links	http://doc.rero.ch/record/19577/files/Weisskopf_Laure_-_Isoflavonoid_exudation_from_white_lupin_roots_is_influenced_20100610.pdf http://onlinelibrary.wiley.com/doi/10.1111/j.1469-8137.2006.01776.x/pdf
Ending Page	668
Page Count	12
Starting Page	657
e-ISSN	14698137
DOI	10.1111/j.1469-8137.2006.01776.x
Journal	New Phytologist
Issue Number	3
Volume Number	171
Language	English
Publisher	Wiley-Blackwell
Publisher Date	2006-08-01
Access Restriction	Open
Subject Keyword	Journal: New Phytologist Lupinus Albus (white Lupin) Phosphate Deficiency
Content Type	Text
Resource Type	Article

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Isoflavonoid exudation from white lupin roots is influenced by phosphate supply, root type and cluster-root stage.

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