Počet záznamů: 1
Early changes of the pH of the apoplast are different in leaves, stem and roots of Vicia faba L. under declining water availability
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SYSNO ASEP 0476350 Druh ASEP J - Článek v odborném periodiku Zařazení RIV J - Článek v odborném periodiku Poddruh J Článek ve WOS Název Early changes of the pH of the apoplast are different in leaves, stem and roots of Vicia faba L. under declining water availability Tvůrce(i) Karuppanapandian, T. (CZ)
Geilfus, C.M. (DE)
Muehling, K.H. (DE)
Novák, Ondřej (UEB-Q) RID, ORCID, SAI
Gloser, V. (CZ)Celkový počet autorů 5 Zdroj.dok. Plant Science. - : Elsevier - ISSN 0168-9452
Roč. 255, FEB (2017), s. 51-58Poč.str. 8 s. Jazyk dok. eng - angličtina Země vyd. IE - Irsko Klíč. slova xylem sap constituents ; abscisic-acid ; stomatal conductance ; leaf apoplast ; helianthus-annuus ; plant-responses ; intact plants ; nacl stress ; drying soil ; guard-cells ; Drought stress ; Abscisic acid ; Soil drying ; Xylem sap ; Osmolality ; Water relations ; Leaf water potential Vědní obor RIV EF - Botanika Obor OECD Plant sciences, botany Institucionální podpora UEB-Q - RVO:61389030 UT WOS 000394194800006 DOI 10.1016/j.plantsci.2016.11.010 Anotace 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. Pracoviště Ústav experimentální botaniky Kontakt David Klier, knihovna@ueb.cas.cz, Tel.: 220 390 469 Rok sběru 2018
Počet záznamů: 1