Mycorrhizal inoculation enhances growth and nutrient uptake of micropropagated apple rootstocks during weaning in commercial substrates of high nutrient availability

2000 ◽  
Vol 15 (2) ◽  
pp. 113-118 ◽  
Author(s):  
A Schubert ◽  
G Lubraco
Keyword(s):  
Nutrient Uptake ◽  
Nutrient Availability ◽  
Apple Rootstocks ◽  
High Nutrient ◽  
Mycorrhizal Inoculation

High nutrient availability leads to weaker top-down control of stream periphyton: Compensatory feeding in Ancylus fluviatilis

2018 ◽  
Vol 64 (1) ◽  
pp. 37-45 ◽  
Author(s):  
Alessandra Iannino ◽  
Alexander T. L. Vosshage ◽  
Markus Weitere ◽  
Patrick Fink
Keyword(s):  
Nutrient Availability ◽  
Top Down ◽  
Compensatory Feeding ◽  
Stream Periphyton ◽  
High Nutrient

scholarly journals TFEB controls retromer expression in response to nutrient availability

2019 ◽  
Vol 218 (12) ◽  
pp. 3954-3966 ◽  
Author(s):  
Rachel Curnock ◽  
Alessia Calcagni ◽  
Andrea Ballabio ◽  
Peter J. Cullen
Keyword(s):  
Transcription Factor ◽  
Transcription Factors ◽  
Amino Acid ◽  
Cell Surface ◽  
Nutrient Uptake ◽  
Nutrient Availability ◽  
Amino Acid Starvation ◽  
Endosomal Recycling ◽  
Transcription Factor Eb ◽  
Glutamine Transporters

Endosomal recycling maintains the cell surface abundance of nutrient transporters for nutrient uptake, but how the cell integrates nutrient availability with recycling is less well understood. Here, in studying the recycling of human glutamine transporters ASCT2 (SLC1A5), LAT1 (SLC7A5), SNAT1 (SLC38A1), and SNAT2 (SLC38A2), we establish that following amino acid restriction, the adaptive delivery of SNAT2 to the cell surface relies on retromer, a master conductor of endosomal recycling. Upon complete amino acid starvation or selective glutamine depletion, we establish that retromer expression is upregulated by transcription factor EB (TFEB) and other members of the MiTF/TFE family of transcription factors through association with CLEAR elements in the promoters of the retromer genes VPS35 and VPS26A. TFEB regulation of retromer expression therefore supports adaptive nutrient acquisition through endosomal recycling.

scholarly journals The effect of drought and intercropping on chicory nutrient uptake from below 2 m studied in a multiple tracer setup

2019 ◽  
Vol 446 (1-2) ◽  
pp. 543-561 ◽  
Author(s):  
Camilla Ruø Rasmussen ◽  
Kristian Thorup-Kristensen ◽  
Dorte Bodin Dresbøll
Keyword(s):  
Trace Elements ◽  
Trace Element ◽  
Nutrient Uptake ◽  
Nutrient Availability ◽  
Tracer Uptake ◽  
Soil Layers ◽  
Pilot Experiment ◽  
Red Beet ◽  
Uptake Rates

Abstract Aims We tested if chicory acquires nutrients from soil layers down to 3.5 m depth and whether the deep nutrient uptake increases as a result of drought or intercropping with ryegrass and black medic. We also tested whether application of the trace elements Cs, Li, Rb, Sr and Se, as tracers, result in similar uptake rates. Methods The methodological tests were carried out in a pilot experiment where the tracers were applied to 1 m depth in lucerne and red beet grown in tube rhizotrons. The dynamics of deep nutrient uptake in chicory was studied in large 4 m deep rhizoboxes. A drought was induced when roots had reached around 2 m depth. Results Chicory acquired 15N from 3.5 m depth and trace element tracers from 2.3 m depth. We found no compensatory tracer uptake with depth during drought. We found some indications of a compensatory tracer uptake from 2.3 and 2.9 m depth in intercropped chicory. Application of equimolar amounts of trace elements resulted in similar excess tracer concentrations within species. Conclusion Chicory demonstrates nutrient uptake from below 3 m but does not increase deep nutrient uptake as a response to limited topsoil nutrient availability induced by drought or intercropping.

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