scholarly journals Plant response to nitrate starvation is determined by N storage capacity matched by nitrate uptake capacity in two Arabidopsis genotypes

2008 ◽  
Vol 59 (4) ◽  
pp. 779-791 ◽  
Author(s):  
C. Richard-Molard ◽  
A. Krapp ◽  
F. Brun ◽  
B. Ney ◽  
F. Daniel-Vedele ◽  
...  
Keyword(s):  
Nitrate Uptake ◽  
Storage Capacity ◽  
Plant Response ◽  
Uptake Capacity ◽  
N Storage ◽  
Nitrate Starvation

scholarly journals LeNRT1.1 Improves Nitrate Uptake in Grafted Tomato Plants under High Nitrogen Demand

2018 ◽  
Vol 19 (12) ◽  
pp. 3921 ◽  
Author(s):  
Francisco Albornoz ◽  
Marlene Gebauer ◽  
Carlos Ponce ◽  
Ricardo Cabeza
Keyword(s):  
Plasma Membrane ◽  
Root Respiration ◽  
Nitrate Uptake ◽  
N Uptake ◽  
Uptake Capacity ◽  
Tomato Plants ◽  
Respiration Rates ◽  
Assimilation Capacity ◽  
N Demand ◽  
Root Plasma Membrane

Grafting has become a common practice among tomato growers to obtain vigorous plants. These plants present a substantial increase in nitrogen (N) uptake from the root zone. However, the mechanisms involved in this higher uptake capacity have not been investigated. To elucidate whether the increase in N uptake in grafted tomato plants under high N demand conditions is related to the functioning of low- (high capacity) or high-affinity (low capacity) root plasma membrane transporters, a series of experiments were conducted. Plants grafted onto a vigorous rootstock, as well as ungrafted and homograft plants, were exposed to two radiation levels (400 and 800 µmol m−2 s−1). We assessed root plasma membrane nitrate transporters (LeNRT1.1, LeNRT1.2, LeNRT2.1, LeNRT2.2 and LeNRT2.3) expression, Michaelis‒Menten kinetics parameters (Vmax and Km), root and leaf nitrate reductase activity, and root respiration rates. The majority of nitrate uptake is mediated by LeNRT1.1 and LeNRT1.2 in grafted and ungrafted plants. Under high N demand conditions, vigorous rootstocks show similar levels of expression for LeNRT1.1 and LeNRT1.2, whereas ungrafted plants present a higher expression of LeNRT1.2. No differences in the uptake capacity (evaluated as Vmax), root respiration rates, or root nitrate assimilation capacity were found among treatments.

Modelling the uptake of nitrate by a growing plant with an adjustable root nitrate uptake capacity

1996 ◽  
Vol 181 (1) ◽  
pp. 19-23 ◽  
Author(s):  
Jan Buysse ◽  
Erik Smolders ◽  
Roel Merckx
Keyword(s):  
Nitrate Uptake ◽  
Uptake Capacity

Does soil anion storage capacity affect plant response to Olsen P status?

2020 ◽  
Vol 48 (3) ◽  
pp. 133-142
Author(s):  
Jeff B. Reid ◽  
Stephen N. Trolove ◽  
Yong Tan ◽  
Denis Curtin
Keyword(s):  
Storage Capacity ◽  
Plant Response ◽  
Olsen P

Improved H2 uptake capacity of transition metal doped benzene by boron substitution

RSC Advances ◽  
2016 ◽  
Vol 6 (52) ◽  
pp. 47033-47042 ◽  
Author(s):  
Amol Deshmukh ◽  
Ravinder Konda ◽  
Vijayanand Kalamse ◽  
Ajay Chaudhari
Keyword(s):  
Transition Metal ◽  
Density Functional ◽  
Storage Capacity ◽  
Basis Set ◽  
Uptake Capacity ◽  
Hydrogen Storage Capacity ◽  
Functional Theory ◽  
Moller Plesset ◽  
Metal Doped ◽  
Boron Substitution

The effect of boron substitution on hydrogen storage capacity of transition metal (TM) doped benzene is studied using density functional theory and the second order Møller–Plesset method with aug-cc-pVDZ basis set.

scholarly journals Nitrate uptake and N allocation in Triticum aestivum L. and Triticum durum Desf. seedlings

2011 ◽  
Vol 52 (No. 2) ◽  
pp. 88-96 ◽  
Author(s):  
M. Trčková ◽  
Z. Stehno ◽  
RaimanováI
Keyword(s):  
Triticum Aestivum ◽  
Nitrogen Content ◽  
Triticum Durum ◽  
Nitrate Uptake ◽  
Species Differences ◽  
Triticum Aestivum L ◽  
Fresh Weight ◽  
Uptake Capacity ◽  
Wheat Seedlings ◽  
Triticum Durum Desf

Inter- and intra-species differences in nitrate uptake and N allocation were studied in wheat seedlings. Two collections of wheat cultivars Triticum aestivum and Triticum durum were grown at controlled conditions in hydroponics (773&micro;M NO<sub>3</sub><sup>&ndash;</sup>, i.e. 10.8 ppm N-NO<sub>3</sub><sup>&ndash;</sup>). At the age of 3 weeks the net rate of nitrate uptake was measured in depletion experiments and it was expressed as &micro;mol NO<sub>3</sub><sup>&ndash; </sup>per g of root fresh weight per hour (&micro;mol/g FW/h). Nitrate uptake capacity of the whole root system was expressed as &micro;mol NO<sub>3</sub><sup>&ndash; </sup>per plantper hour (&micro;mol/plant/h). At the same time wheat plants were harvested and analyzed for nitrogen content. In contrast to the net rate of NO<sub>3</sub><sup>&ndash; </sup>uptake (3.98&ndash;8.57&nbsp;&micro;mol/g FW/h) the net NO<sub>3</sub><sup>&ndash; </sup>uptake capacity of T. aestivum roots (6.37&ndash;11.66 &micro;mol/plant/h) significantly differed from T. durum roots (15.26&ndash;22.69 &micro;mol/plant/h). Within T. aestivum collection cultivar Roxo exhibits the lowest value in both traits (3.98 &micro;mol NO<sub>3</sub><sup>&ndash;</sup>/g FW/h and 6.67 &micro;mol NO<sub>3</sub><sup>&ndash;</sup>/plant/h). By contrast Strela was characterized by relatively low NO<sub>3</sub><sup>&ndash; </sup>uptake rate (5.47 &micro;mol/g FW/h) and the highest NO<sub>3</sub><sup>&ndash; </sup>uptake capacity (11.66 &micro;mol/plant/h). Intra-species differences in T. durum group were not significant. In both species about 70% total nitrogen was found in shoot. Statistically significant differences in nitrogen content and its allocation were affected by growth rate in early stages of development.

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