DC pole | Wartość | Język |
dc.contributor.author | Rudnicka, Małgorzata | - |
dc.contributor.author | Ludynia, Michał | - |
dc.contributor.author | Karcz, Waldemar | - |
dc.date.accessioned | 2019-01-09T13:34:22Z | - |
dc.date.available | 2019-01-09T13:34:22Z | - |
dc.date.issued | 2018 | - |
dc.identifier.citation | "Plant Growth Regul" Vol. 84, no. 1 (2018 ), s. 107-122 | pl_PL |
dc.identifier.issn | 0167-6903 | - |
dc.identifier.uri | http://hdl.handle.net/20.500.12128/7719 | - |
dc.description.abstract | The effects of 1,4-naphthoquinone (NQ) and
2-hydroxy-1,4-naphthoquinone (NQ-2-OH) on indole-3-acetic
acid (IAA)-induced growth, medium pH changes and
membrane potential (
Em) in maize (Zea mays L.) coleoptile
cells were determined. In addition, the redox cycling properties
of both naphthoquinones were also compared. The
dose-response curves constructed for the effects of NQ and
NQ-2-OH on endogenous and IAA-induced growth differ
in shape. It was found that NQ was by 10–50% more effective
in inhibiting IAA-induced growth in maize coleoptile
segments than NQ-2-OH. Simultaneous measurements of
growth and external medium pH indicated that NQ and NQ-
2-OH reduced or eliminated proton extrusion at all of the
concentrations used, excluding NQ at 1 μM. It was found
that both naphthoquinones at concentrations higher than
10 μM caused the depolarisation of the membrane potential
(
Em). Additionally, compared to the controls, NQ- and
NQ-2-OH-exposure of coleoptile segments, at concentrations
higher than 10 μM, caused an elevation of the hydrogen
peroxide (
H2O2) production and plasma membrane
redox activity. The highest catalase activity was observed
at 10 μM NQ and it was ca. 18-fold greater (at 4 h) than in
the control medium. Moreover, it was also found that NQ
and NQ-2-OH, at all concentrations studied, increased the
malondialdehyde content of coleoptile segments at 4 h of the experiment. The data presented here are discussed taking
into account the “acid growth hypothesis” of auxin action
and the mechanisms by which naphthoquinones interact with
biological systems. | pl_PL |
dc.language.iso | en | pl_PL |
dc.rights | Uznanie autorstwa 3.0 Polska | * |
dc.rights.uri | http://creativecommons.org/licenses/by/3.0/pl/ | * |
dc.subject | Growth rate | pl_PL |
dc.subject | Medium pH | pl_PL |
dc.subject | Membrane potential | pl_PL |
dc.subject | Naphthoquinones | pl_PL |
dc.subject | Oxidative stress | pl_PL |
dc.title | A comparison of the effects of 1,4-naphthoquinone and 2-hydroxy-1,4-naphthoquinone (lawsone) on indole-3-acetic acid (IAA)-induced growth of maize coleoptile cells | pl_PL |
dc.type | info:eu-repo/semantics/article | pl_PL |
dc.relation.journal | Plant Growth Regul | pl_PL |
dc.identifier.doi | 10.1007/s10725-017-0325-9 | - |
Pojawia się w kolekcji: | Artykuły (WNP)
|