Early changes of the pH of the apoplast are different in leaves, stem and roots of Vicia faba L. under declining water availability

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F61389030%3A_____%2F17%3A00476350" target="_blank" >RIV/61389030:_____/17:00476350 - isvavai.cz</a>

Nalezeny alternativní kódy

RIV/00216224:14310/17:00095947 RIV/61989592:15310/17:73584177

Výsledek na webu

<a href="http://dx.doi.org/10.1016/j.plantsci.2016.11.010" target="_blank" >http://dx.doi.org/10.1016/j.plantsci.2016.11.010</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1016/j.plantsci.2016.11.010" target="_blank" >10.1016/j.plantsci.2016.11.010</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Early changes of the pH of the apoplast are different in leaves, stem and roots of Vicia faba L. under declining water availability

Popis výsledku v původním jazyce

Changes in pH of the apoplast have recently been discussed as an important factor in adjusting transpiration and water relations under conditions of drought via modulatory effect on abscisic acid (ABA) concentration. Using Vicia faba L., we investigated whether changes in the root, shoot and leaf apoplastic pH correlated with (1) a drought-induced reduction in transpiration and with (2) changes in ABA concentration. Transpiration, leaf water potential and ABA in leaves were measured and correlated with root and shoot xylem pH, determined by a pH microelectrode, and pH of leaf apoplast quantified by microscopy-based in vivo ratiometric analysis. Results revealed that a reduction in transpiration rate in the early phase of soil drying could not be linked with changes in the apoplastic pH via effects on the stomata-regulating hormone ABA. Moreover, drought-induced increase in pH of xylem or leaf apoplast was not the remote effect of an acropetal transport of alkaline sap from root, because root xylem acidified during progressive soil drying, whereas the shoot apoplast alkalized. We reason that other, yet unknown signalling mechanism was responsible for reduction of transpiration rate in the early phase of soil drying.

Název v anglickém jazyce

Early changes of the pH of the apoplast are different in leaves, stem and roots of Vicia faba L. under declining water availability

Popis výsledku anglicky

Changes in pH of the apoplast have recently been discussed as an important factor in adjusting transpiration and water relations under conditions of drought via modulatory effect on abscisic acid (ABA) concentration. Using Vicia faba L., we investigated whether changes in the root, shoot and leaf apoplastic pH correlated with (1) a drought-induced reduction in transpiration and with (2) changes in ABA concentration. Transpiration, leaf water potential and ABA in leaves were measured and correlated with root and shoot xylem pH, determined by a pH microelectrode, and pH of leaf apoplast quantified by microscopy-based in vivo ratiometric analysis. Results revealed that a reduction in transpiration rate in the early phase of soil drying could not be linked with changes in the apoplastic pH via effects on the stomata-regulating hormone ABA. Moreover, drought-induced increase in pH of xylem or leaf apoplast was not the remote effect of an acropetal transport of alkaline sap from root, because root xylem acidified during progressive soil drying, whereas the shoot apoplast alkalized. We reason that other, yet unknown signalling mechanism was responsible for reduction of transpiration rate in the early phase of soil drying.

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/EE2.3.30.0037" target="_blank" >EE2.3.30.0037: Zaměstnáním nejlepších mladých vědců k rozvoji mezinárodní spolupráce</a><br>

Návaznosti

I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Rok uplatnění

2017

Kód důvěrnosti údajů

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

Název periodika

Plant Science

ISSN

0168-9452

e-ISSN

—

Svazek periodika

255

Číslo periodika v rámci svazku

FEB

Stát vydavatele periodika

IE - Irsko

Počet stran výsledku

8

Strana od-do

51-58

Kód UT WoS článku

000394194800006

EID výsledku v databázi Scopus

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