Depletion of carbohydrate reserves limits nitrate uptake during early regrowth in Lolium perenne L.

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F61389030%3A_____%2F17%3A00476507" target="_blank" >RIV/61389030:_____/17:00476507 - isvavai.cz</a>

Nalezeny alternativní kódy

RIV/61989592:15310/17:73584035

Výsledek na webu

<a href="http://dx.doi.org/10.1093/jxb/erx056" target="_blank" >http://dx.doi.org/10.1093/jxb/erx056</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1093/jxb/erx056" target="_blank" >10.1093/jxb/erx056</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Depletion of carbohydrate reserves limits nitrate uptake during early regrowth in Lolium perenne L.

Popis výsledku v původním jazyce

The mechanisms linking C/N balance to N uptake and assimilation are central to plant responses to changing soil nutrient levels. Defoliation and subsequent regrowth of grasses both impact C partitioning, thereby creating a significant point of interaction with soil N availability. Using defoliation as an experimental treatment, we investigated the dynamic relationships between plant carbohydrate status and NO 3 responsive uptake systems, transporter gene expression, and nitrate assimilation in Lolium perenne L. High-and low-affinity NO 3 uptake was reduced in an N-dependent manner in response to a rapid and large shift in carbohydrate remobilization triggered by defoliation. This reduction in NO 3 uptake was rescued by an exogenous glucose supplement, confirming the carbohydrate dependence of NO 3 uptake. The regulation of NO 3 uptake in response to the perturbation of the plant C/N ratio was associated with changes in expression of putative high- and low-affinity NO 3 transporters. Furthermore, NO 3 assimilation appears to be regulated by the C-N status of the plant, implying a mechanism that signals the availability of C metabolites for NO 3 uptake and assimilation at the whole-plant level. We also show that cytokinins may be involved in the regulation of N acquisition and assimilation in response to the changing plant C/N ratio.

Název v anglickém jazyce

Depletion of carbohydrate reserves limits nitrate uptake during early regrowth in Lolium perenne L.

Popis výsledku anglicky

The mechanisms linking C/N balance to N uptake and assimilation are central to plant responses to changing soil nutrient levels. Defoliation and subsequent regrowth of grasses both impact C partitioning, thereby creating a significant point of interaction with soil N availability. Using defoliation as an experimental treatment, we investigated the dynamic relationships between plant carbohydrate status and NO 3 responsive uptake systems, transporter gene expression, and nitrate assimilation in Lolium perenne L. High-and low-affinity NO 3 uptake was reduced in an N-dependent manner in response to a rapid and large shift in carbohydrate remobilization triggered by defoliation. This reduction in NO 3 uptake was rescued by an exogenous glucose supplement, confirming the carbohydrate dependence of NO 3 uptake. The regulation of NO 3 uptake in response to the perturbation of the plant C/N ratio was associated with changes in expression of putative high- and low-affinity NO 3 transporters. Furthermore, NO 3 assimilation appears to be regulated by the C-N status of the plant, implying a mechanism that signals the availability of C metabolites for NO 3 uptake and assimilation at the whole-plant level. We also show that cytokinins may be involved in the regulation of N acquisition and assimilation in response to the changing plant C/N ratio.

Druh

J_imp - Článek v periodiku v databázi Web of Science

CEP obor

—

OECD FORD obor

10611 - Plant sciences, botany

Projekt

<a href="/cs/project/GA17-06613S" target="_blank" >GA17-06613S: Komplexní interakce mezi fytohormony během mrazové aklimatizace</a><br>

Návaznosti

P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)

Rok uplatnění

2017

Kód důvěrnosti údajů

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Název periodika

Journal of Experimental Botany

ISSN

0022-0957

e-ISSN

—

Svazek periodika

68

Číslo periodika v rámci svazku

7

Stát vydavatele periodika

GB - Spojené království Velké Británie a Severního Irska

Počet stran výsledku

15

Strana od-do

1569-1583

Kód UT WoS článku

000400341800017

EID výsledku v databázi Scopus

2-s2.0-85020161657