Abstract
A cytochemical study has been made on the localization of ATPase activity in corn (Zea mays L.) roots. Light microscopy shows washing for 4 hours to increase the general ATPase activity in the peripheral layers of the root cortex; oligomycin and N,N-dicyclohexylcarbodiimide inhibit this activity, oligomycin being more effective. Ultrastructural studies of ATPase location show oligomycin treatment to inhibit both mitochondrial and plasmalemma ATPase, but only in the epidermis and outer cortex. Studies with lipid-soluble dyes indicate that oligomycin might not penetrate very deeply into root tissue in the time span of these experiments. It is suggested that the strong inhibition of ion absorption by oligomycin without a corresponding decline in ATP content is probably due to inhibition of ion absorption in the peripheral cell layers, thus limiting the supply of ion for symplastic transport to the uninhibited tissues.
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Claims 9
Claim · model-written summary
Washing for 4 hours increased the general ATPase activity in the peripheral layers of the corn root cortex.
- Organ / stage
- peripheral layers of the root cortexe1
- Treatment
- washing for 4 hourse1
- Outcome
- general ATPase activitye1
- Direction
- increasee1
Zea maysNot reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“corn (Zea mays L.) roots”
e1“Light microscopy shows washing for 4 hours to increase the general ATPase activity in the peripheral layers of the root cortex”
Claim · model-written summary
Oligomycin inhibited the general ATPase activity in corn roots.
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“corn (Zea mays L.) roots”
e2“washing for 4 hours to increase the general ATPase activity in the peripheral layers of the root cortex; oligomycin and N,N-dicyclohexylcarbodiimide inhibit this activity, oligomycin being more effective”
Claim · model-written summary
N,N-dicyclohexylcarbodiimide inhibited the general ATPase activity in corn roots.
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“corn (Zea mays L.) roots”
e2“washing for 4 hours to increase the general ATPase activity in the peripheral layers of the root cortex; oligomycin and N,N-dicyclohexylcarbodiimide inhibit this activity, oligomycin being more effective”
Claim · model-written summary
Oligomycin was more effective than N,N-dicyclohexylcarbodiimide at inhibiting ATPase activity in corn roots.
- Treatment
- oligomycine2
- Outcome
- more effectivee2
- Direction
- more effectivee2
- Comparator
- N,N-dicyclohexylcarbodiimidee2
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“corn (Zea mays L.) roots”
e2“washing for 4 hours to increase the general ATPase activity in the peripheral layers of the root cortex; oligomycin and N,N-dicyclohexylcarbodiimide inhibit this activity, oligomycin being more effective”
Claim · model-written summary
Oligomycin treatment inhibited mitochondrial and plasmalemma ATPase only in the epidermis and outer cortex of corn roots.
- Organ / stage
- epidermis and outer cortexe3
- Treatment
- oligomycin treatmente3
- Outcome
- mitochondrial and plasmalemma ATPasee3
- Direction
- inhibite3
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“corn (Zea mays L.) roots”
e3“Ultrastructural studies of ATPase location show oligomycin treatment to inhibit both mitochondrial and plasmalemma ATPase, but only in the epidermis and outer cortex”
Claim · model-written summary
Oligomycin might not penetrate very deeply into corn root tissue during these experiments.
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“corn (Zea mays L.) roots”
e4“Studies with lipid-soluble dyes indicate that oligomycin might not penetrate very deeply into root tissue in the time span of these experiments”
Claim · model-written summary
Oligomycin strongly inhibited ion absorption in corn roots.
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“corn (Zea mays L.) roots”
e5“the strong inhibition of ion absorption by oligomycin without a corresponding decline in ATP content is probably due to inhibition of ion absorption in the peripheral cell layers”
Claim · model-written summary
Oligomycin did not produce a corresponding decline in ATP content in corn roots.
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“corn (Zea mays L.) roots”
e5“the strong inhibition of ion absorption by oligomycin without a corresponding decline in ATP content is probably due to inhibition of ion absorption in the peripheral cell layers”
Claim · model-written summary
Strong inhibition of ion absorption in the peripheral cell layers is suggested to limit ion supply for symplastic transport in corn roots.
- Outcome
- supply of ion for symplastic transporte6
- Qualifier
- inhibition of ion absorption in the peripheral cell layerse6
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“corn (Zea mays L.) roots”
e6“is probably due to inhibition of ion absorption in the peripheral cell layers, thus limiting the supply of ion for symplastic transport”
The same questions in other papers
oligomycin · nutrient: content · Zea mays (maize)Positive and negative results
5 papers in the same direction as this paper · 1 in the opposite direction
- positive
- no effect
- negative
3 papers more in this group
See all 7 papers →oligomycin · molecular: metabolites · Zea mays (maize)Results agree
3 papers in the same direction as this paper
- negative
- negative
- negative
Claims are grouped by organism, treatment and what was measured or targeted. A paper counts as positive when any of its claims in the group is positive.