scholarly journals Light-dependent activation of phosphoenolpyruvate carboxylase by reversible phosphorylation in cluster roots of white lupin plants: diurnal control in response to photosynthate supply

2016 ◽  
Vol 118 (4) ◽  
pp. 637-643 ◽  
Author(s):  
Michael W. Shane ◽  
Regina Feil ◽  
John E. Lunn ◽  
William C. Plaxton
Keyword(s):  
Phosphoenolpyruvate Carboxylase ◽  
White Lupin ◽  
Cluster Roots ◽  
Reversible Phosphorylation

scholarly journals Nodulated White Lupin Plants Growing in Contaminated Soils Accumulate Unusually High Mercury Concentrations in Their Nodules, Roots and Especially Cluster Roots

Horticulturae ◽  
2021 ◽  
Vol 7 (9) ◽  
pp. 302
Author(s):  
Miguel A. Quiñones ◽  
Susana Fajardo ◽  
Mercedes Fernández-Pascual ◽  
M. Mercedes Lucas ◽  
José J. Pueyo
Keyword(s):  
Contaminated Soils ◽  
Lupinus Albus ◽  
White Lupin ◽  
Cluster Roots ◽  
Cluster Root ◽  
Bioaccumulation Factors ◽  
Aerial Parts ◽  
High Mercury ◽  
Lupinus Albus L ◽  
Hg Accumulation

Two white lupin (Lupinus albus L.) cultivars were tested for their capacity to accumulate mercury when grown in Hg-contaminated soils. Plants inoculated with a Bradyrhizobium canariense Hg-tolerant strain or non-inoculated were grown in two highly Hg-contaminated soils. All plants were nodulated and presented a large number of cluster roots. They accumulated up to 600 μg Hg g−1 DW in nodules, 1400 μg Hg g−1 DW in roots and 2550 μg Hg g−1 DW in cluster roots. Soil, and not cultivar or inoculation, was accountable for statistically significant differences. No Hg translocation to leaves or seeds took place. Inoculated L. albus cv. G1 plants were grown hydroponically under cluster root-promoting conditions in the presence of Hg. They accumulated about 500 μg Hg g−1 DW in nodules and roots and up to 1300 μg Hg g−1 DW in cluster roots. No translocation to the aerial parts occurred. Bioaccumulation factors were also extremely high, especially in soils and particularly in cluster roots. To our knowledge, Hg accumulation in cluster roots has not been reported to date. Our results suggest that inoculated white lupin might represent a powerful phytoremediation tool through rhizosequestration of Hg in contaminated soils. Potential uptake and immobilization mechanisms are discussed.

How to tell the time: the regulation of phosphoenolpyruvate carboxylase in Crassulacean acid metabolism (CAM) plants

2003 ◽  
Vol 31 (3) ◽  
pp. 728-730 ◽  
Author(s):  
H.G. Nimmo
Keyword(s):  
Circadian Rhythms ◽  
Phosphoenolpyruvate Carboxylase ◽  
Crassulacean Acid Metabolism ◽  
Acid Metabolism ◽  
Circadian Oscillator ◽  
Cam Plants ◽  
Reversible Phosphorylation ◽  
Circadian Expression ◽  
Phosphoenolpyruvate Carboxylase Kinase ◽  
Co2 Metabolism

Crassulacean acid metabolism (CAM) plants exhibit persistent circadian rhythms of CO2 metabolism. These rhythms are driven by changes in the flux through phosphoenolpyruvate carboxylase, which is regulated by reversible phosphorylation in response to a circadian oscillator. This article reviews progress in our understanding of the circadian expression of phosphoenolpyruvate carboxylase kinase.

scholarly journals Update on White Lupin Cluster Root Acclimation to Phosphorus Deficiency Update on Lupin Cluster Roots

2011 ◽  
Vol 156 (3) ◽  
pp. 1025-1032 ◽  
Author(s):  
Lingyun Cheng ◽  
Bruna Bucciarelli ◽  
Jianbo Shen ◽  
Deborah Allan ◽  
Carroll P. Vance
Keyword(s):  
Phosphorus Deficiency ◽  
White Lupin ◽  
Cluster Roots ◽  
Cluster Root

scholarly journals Expression of plasma membrane H+ -ATPase in cluster roots of white lupin under phosphorus deficiency

2019 ◽  
Vol 182 (6) ◽  
pp. 867-870
Author(s):  
Sophie Stein ◽  
Franziska Faust ◽  
Stephan Jung ◽  
Sven Schubert
Keyword(s):  
Plasma Membrane ◽  
Phosphorus Deficiency ◽  
White Lupin ◽  
Cluster Roots

scholarly journals Nitric oxide is the shared signalling molecule in phosphorus- and iron-deficiency-induced formation of cluster roots in white lupin (Lupinus albus)

2012 ◽  
Vol 109 (6) ◽  
pp. 1055-1064 ◽  
Author(s):  
Zhi Bin Meng ◽  
Li Qian Chen ◽  
Dong Suo ◽  
Gui Xin Li ◽  
Cai Xian Tang ◽  
...  
Keyword(s):  
Nitric Oxide ◽  
Iron Deficiency ◽  
Lupinus Albus ◽  
White Lupin ◽  
Cluster Roots ◽  
Signalling Molecule

scholarly journals Burkholderia Species Are Major Inhabitants of White Lupin Cluster Roots

2011 ◽  
Vol 77 (21) ◽  
pp. 7715-7720 ◽  
Author(s):  
Laure Weisskopf ◽  
Stefanie Heller ◽  
Leo Eberl
Keyword(s):  
Burkholderia Cepacia ◽  
Carbon Sources ◽  
White Lupin ◽  
Cluster Roots ◽  
Bacterial Populations ◽  
Content Type ◽  
Significant Enrichment ◽  
Branched Structure ◽  
Successful Colonization

ABSTRACTThe formation of cluster roots by plants represents a highly efficient strategy for acquisition of sparingly available phosphate. This particular root type is characterized by a densely branched structure and high exudation of organic acids and protons, which are likely to influence the resident bacterial community. Until now, the identity of the bacterial populations living in cluster roots has not been investigated. We applied cultivation-dependent and cultivation-independent methods to characterize the dominant bacterial genera inhabiting the growing cluster roots of white lupin. We observed a high relative abundance ofBurkholderiaspecies (up to 58% of all isolated strains and 44% of all retrieved 16S rRNA sequences) and a significant enrichment with increasing cluster root age. Most of the sequences retrieved clustered together with known plant- or fungus-associatedBurkholderiaspecies, while only one of 98 sequences was affiliated with theBurkholderia cepaciacomplex.In vitroassays revealed thatBurkholderiastrains were much more tolerant to low pH than non-Burkholderiastrains. Moreover, many strains produced large amounts of siderophores and were able to utilize citrate and oxalate as carbon sources. These features seem to represent important traits for the successful colonization and maintenance ofBurkholderiaspecies in white lupin cluster roots.

scholarly journals The alternative respiratory pathway mediates carboxylate synthesis in white lupin cluster roots under phosphorus deprivation

2013 ◽  
Vol 37 (4) ◽  
pp. 922-928 ◽  
Author(s):  
IGOR FLOREZ-SARASA ◽  
HANS LAMBERS ◽  
XING WANG ◽  
PATRICK M. FINNEGAN ◽  
MIQUEL RIBAS-CARBO
Keyword(s):  
White Lupin ◽  
Cluster Roots ◽  
Respiratory Pathway ◽  
Alternative Respiratory Pathway ◽  
Phosphorus Deprivation
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