Abstract
The aim of this study was to evaluate the impact of hydrogen peroxide (H 2 O 2 ) on the elongation growth of maize coleoptile cells induced by auxin (IAA) and fusicoccin (FC) according to the “acid growth theory”. The key component of this process is PM H + -ATPase activity and the resulting proton extrusion. In order to complete this objective, measurements of coleoptile growth were made, pump activity was analyzed through changes in environmental pH and cell membrane potential, and the impact on oxidative stress in response to H 2 O 2 was determined. It was found that although hydrogen peroxide restricts acid growth induced by both IAA and FC to a similar level, the PM H + -ATPase activity is inhibited differently. These findings indicate that in the presence of H 2 O 2 , the previously described wall-stiffening process might be the primary limiting factor in the elongation growth of maize coleoptile cells.
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Claims 4
Claim · model-written summary
Hydrogen peroxide restricts auxin-induced acid growth.
Zea maysNot reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“hydrogen peroxide restricts acid growth induced by both IAA and FC to a similar level”
t0“maize”
Claim · model-written summary
Hydrogen peroxide restricts fusicoccin-induced acid growth.
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“hydrogen peroxide restricts acid growth induced by both IAA and FC to a similar level”
t0“maize”
Claim · model-written summary
Pump activity was inhibited differently.
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“PM H + -ATPase activity is inhibited differently”
t0“maize”
Claim · model-written summary
Wall stiffening might primarily limit elongation.
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“the previously described wall-stiffening process might be the primary limiting factor in the elongation growth of maize coleoptile cells”
The same questions in other papers
hydrogen peroxide · growth · Zea mays (maize)Results differ
2 papers in the same direction as this paper · 14 in the opposite direction
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