Citrate exudation from white lupin induced by phosphorus deficiency differs from that induced by aluminum.

Citrate exudation from white lupin induced by phosphorus deficiency differs from that induced by aluminum. Research Abstract Details 

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Citrate exudation from white lupin induced by phosphorus deficiency differs from that induced by aluminum. Abstract Text:

B L Wang,J B Shen,W H Zhang,F S Zhang,G Neumann,B L Wang,J B Shen,W H Zhang,F S Zhang,G Neumann,

Both phosphorus (P) deficiency and aluminum (Al) toxicity induce root exudation of carboxylates, but the relationship between these two effects is not fully understood. Here, carboxylate exudation induced by Al in Lupinus albus (white lupin) was characterized and compared with that induced by P deficiency. Aluminum treatments were applied to whole root systems or selected root zones of plants with limited (1 microM) or sufficient (50 microM) P supply. Aluminum stimulated citrate efflux after 1-2 h; this response was not mimicked by a similar trivalent cation, La(3+). P deficiency triggered citrate release from mature cluster roots, whereas Al stimulated citrate exudation from the 5- to 10-mm subapical root zones of lateral roots and from mature and senescent cluster roots. Al-induced citrate exudation was inhibited by P limitation at the seedling stage, but was stimulated at later growth stages. Citrate exudation was sensitive to anion-channel blockers. Al treatments did not affect primary root elongation, but inhibited the elongation of lateral roots. The data demonstrate differential patterns of citrate exudation in L. albus, depending on root zone, developmental stage, P nutritional status and Al stress. These findings are discussed in terms of possible functions and underlying mechanisms.

Citrate exudation from white lupin induced by phosphorus deficiency differs from that induced by aluminum. Publishing Authors By Initials

BL Wang,JB Shen,WH Zhang,FS Zhang,G Neumann,BL Wang,JB Shen,WH Zhang,FS Zhang,G Neumann,

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Citrate exudation from white lupin induced by phosphorus deficiency differs from that induced by aluminum. Journal Published:

PUBLICATION TYPE: Research Support, Non-U.S. Gov

Journal: The New phytologist

VOLUME: 176

Page Numbers: 581-9

Journal Abbreviation: New Phytol.

ISSN: 0028-646X

DAY: 23

MONTH: 08

YEAR: 2007

Citrate exudation from white lupin induced by phosphorus deficiency differs from that induced by aluminum. Information

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LANGUAGE: eng

NlmUniqueID: 9882884

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Grant and Affiliation Information for Citrate exudation from white lupin induced by phosphorus deficiency differs from that induced by aluminum.

AFFILIATION: Department of Plant Nutrition, China Agricultural University, Key Laboratory of Plant-Soil Interactions, Ministry of Education, Beijing 100094, China.

Country: England

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MEDLINETA: New Phytol

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