DC pole | Wartość | Język |
dc.contributor.author | Polak, Małgorzata | - |
dc.contributor.author | Karcz, Waldemar | - |
dc.date.accessioned | 2021-02-26T10:32:27Z | - |
dc.date.available | 2021-02-26T10:32:27Z | - |
dc.date.issued | 2021 | - |
dc.identifier.citation | "International Journal of Molecular Sciences" (2021), iss. 5, art. no. 2317 | pl_PL |
dc.identifier.issn | 1422-0067 | - |
dc.identifier.uri | http://hdl.handle.net/20.500.12128/19294 | - |
dc.description.abstract | Two arguments against the “acid growth theory” of auxin-induced growth were re-examined.
First, the lack of a correlation between the IAA-induced growth and medium acidification,
which is mainly due to the cuticle, which is a barrier for proton diffusion. Second, acid- and the
IAA-induced growth are additive processes, which means that acid and the IAA act via different
mechanisms. Here, growth, medium pH, and membrane potential (in some experiments) were simultaneously
measured using non-abraded and non-peeled segments but with the incubation medium
having access to their lumen. Using such an approach significantly enhances both the IAAinduced
growth and proton extrusion (similar to that of abraded segments). Staining the cuticle on
the outer and inner epidermis of the coleoptile segments showed that the cuticle architecture differs
on both sides of the segments. The dose-response curves for the IAA-induced growth and proton
extrusion were bell-shaped with the maximum at 10−4 M over 10 h. The kinetics of the IAA-induced
hyperpolarisation was similar to that of the rapid phase of the IAA-induced growth. It is also proposed
that the K+/H+ co-transporters are involved in acid-induced growth and that the combined
effect of the K+ channels and K+/ H+ co-transporters is responsible for the IAA-induced growth. These
findings support the “acid growth theory” of auxin action. | 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 | auxin | pl_PL |
dc.subject | coleoptile segments | pl_PL |
dc.subject | growth | pl_PL |
dc.subject | membrane potential | pl_PL |
dc.subject | proton extrusion | pl_PL |
dc.title | Some new methodological and conceptual aspects of the "acid growth theory" for the auxin action in Maize (Zea mays L.) coleoptile segments: do acid- and auxin-induced rapid growth differ in their mechanisms? | pl_PL |
dc.type | info:eu-repo/semantics/article | pl_PL |
dc.identifier.doi | 10.3390/ijms22052317 | - |
Pojawia się w kolekcji: | Artykuły (WNP)
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