NDLI: Spatial and temporal variation in citrate and malate exudation and tissue concentration as affected by P stress in roots of white lupin

Content Provider	Springer Nature Link
Author	Peñaloza, Enrique Corcuera, Luis J. Martinez, José
Copyright Year	2002
Abstract	Exudation of carboxylates represents one the most efficient strategies used by P-starved white lupin (Lupinus albus L.) to acquire phosphorus from sparingly soluble sources. This exudation occurs through proteoid root clusters, with citrate being the predominant organic acid released. The occasional detection of malate in whole root exudates suggests that this acid would also be released, but from tissues other than root clusters. To investigate the spatial and temporal pattern of exudation, citrate and malate exudation and concentration were measured in whole roots and root sections of white lupin, from seedling emergence to plant senescence due to P starvation. Both organic acids were detected in whole root exudates of P-stressed plants, and they were released at similar rates throughout the experiment. Malate was predominantly exuded from apices of both seedling taproots and proteoid roots, whereas citrate exudation was restricted to proteoid root clusters. Studies directed to address the association between carboxylate exudation and concentration in proteoid root clusters showed a non-linear response for citrate, within the range of 7 to 23 μmol g$^{−1}$ fresh weight. This association was further assessed by altering citrate concentration in the whole root. Adding P to 24-day-old P-starved plants reduced citrate concentration and exudation to the level of the control P-fed plants, demonstrating that citrate exudation and concentration are associated. Malate exudation and concentration did not correlate significantly. Results indicate that citrate release by P-starved white lupin would occur whenever a certain threshold of citrate concentration is attained, and that the sites, the rates and the span of transient exudation depend on the physiological age of the tissue.
Starting Page	209
Ending Page	221
Page Count	13
File Format	PDF
ISSN	0032079X
Journal	Plant and Soil
Volume Number	241
Issue Number	2
e-ISSN	15735036
Language	English
Publisher	Kluwer Academic Publishers
Publisher Date	2002-01-01
Publisher Place	Dordrecht
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	Ecology Plant Sciences Plant Physiology Soil Science & Conservation
Content Type	Text
Resource Type	Article
Subject	Soil Science Plant Science

Sl.	Authority	Responsibilities	Communication Details
1	Ministry of Education (GoI), Department of Higher Education	Sanctioning Authority	https://www.education.gov.in/ict-initiatives
2	Indian Institute of Technology Kharagpur	Host Institute of the Project: The host institute of the project is responsible for providing infrastructure support and hosting the project	https://www.iitkgp.ac.in
3	National Digital Library of India Office, Indian Institute of Technology Kharagpur	The administrative and infrastructural headquarters of the project	Dr. B. Sutradhar bsutra@ndl.gov.in
4	Project PI / Joint PI	Principal Investigator and Joint Principal Investigators of the project	Dr. B. Sutradhar bsutra@ndl.gov.in Prof. Saswat Chakrabarti will be added soon
5	Website/Portal (Helpdesk)	Queries regarding NDLI and its services	support@ndl.gov.in
6	Contents and Copyright Issues	Queries related to content curation and copyright issues	content@ndl.gov.in
7	National Digital Library of India Club (NDLI Club)	Queries related to NDLI Club formation, support, user awareness program, seminar/symposium, collaboration, social media, promotion, and outreach	clubsupport@ndl.gov.in
8	Digital Preservation Centre (DPC)	Assistance with digitizing and archiving copyright-free printed books	dpc@ndl.gov.in
9	IDR Setup or Support	Queries related to establishment and support of Institutional Digital Repository (IDR) and IDR workshops	idr@ndl.gov.in

Bioavailability of zinc and phosphorus in calcareous soils as affected by citrate exudation

Phosphorus deficiency-induced modifications in citrate catabolism and in cytosolic pH as related to citrate exudation in cluster roots of white lupin

Citrate exudation induced by aluminum is independent of plasma membrane H$^{+}$-ATPase activity and coupled with potassium efflux from cluster roots of phosphorus-deficient white lupin

Impact of phosphorus mineral source (Al–P or Fe–P) and pH on cluster-root formation and carboxylate exudation in Lupinus albus L.

Spatial and temporal variation in organic acid anion exudation and nutrient anion uptake in the rhizosphere of Lupinus albus L.

Spatial and temporal dynamics of the microbial community structure in the rhizosphere of cluster roots of white lupin (Lupinus albus L.)

Bioavailability of zinc and phosphorus in calcareous soils as affected by citrate exudation

White Lupin (Lupinus albus) response to phosphorus stress: evidence for complex regulation of LaSAP1

Transgenic tobacco plants overexpressing pyruvate phosphate dikinase increase exudation of organic acids and decrease accumulation of aluminum in the roots

Spatial and temporal variation in citrate and malate exudation and tissue concentration as affected by P stress in roots of white lupin

Similar Documents

Bioavailability of zinc and phosphorus in calcareous soils as affected by citrate exudation

Phosphorus deficiency-induced modifications in citrate catabolism and in cytosolic pH as related to citrate exudation in cluster roots of white lupin

Citrate exudation induced by aluminum is independent of plasma membrane H$^{+}$-ATPase activity and coupled with potassium efflux from cluster roots of phosphorus-deficient white lupin

Impact of phosphorus mineral source (Al–P or Fe–P) and pH on cluster-root formation and carboxylate exudation in Lupinus albus L.

Spatial and temporal variation in organic acid anion exudation and nutrient anion uptake in the rhizosphere of Lupinus albus L.

Spatial and temporal dynamics of the microbial community structure in the rhizosphere of cluster roots of white lupin (Lupinus albus L.)

Bioavailability of zinc and phosphorus in calcareous soils as affected by citrate exudation

White Lupin (Lupinus albus) response to phosphorus stress: evidence for complex regulation of LaSAP1

Transgenic tobacco plants overexpressing pyruvate phosphate dikinase increase exudation of organic acids and decrease accumulation of aluminum in the roots

Spatial and temporal variation in citrate and malate exudation and tissue concentration as affected by P stress in roots of white lupin