Abstract
Indoleacetic acid (IAA) and/or inhibitors of DNA, RNA or protein synthesis were added to the apex of decapitated seedlings of Pisum sativum L. var. Alaska. At various times up to 4 days, enzymic protein was extracted from a segment of epicotyl immediately below the apex and assayed for its ability to hydrolyse polysaccharides or their derivatives. With the exception of amylase, the total amounts per segment of all of the tested enzymes increased due to IAA treatment. The development of beta-1,4-glucanase (cellulase) activity per unit of protein or fresh weight proceeded according to a typical sigmoid induction curve. Pectinase was formed for about 2 days in control segments and IAA treatment resulted in continued synthesis for at least another 2 days provided cell division took place. beta-1,3-glucanase and pectinesterase activities were only enhanced by IAA to the extent that total protein levels increased. Reaction mechanisms for these effects and functions for the enzymes during growth are discussed.
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Claims 4
Claim · model-written summary
IAA increased the total amounts of tested enzymes per pea epicotyl segment except amylase.
- Taxon
- Pisum sativum L. var. Alaska
Lathyrus oleraceust0 - Treatment
- IAA treatmente0
- Outcome
- total amounts per segment of all of the tested enzymese0
- Direction
- increasede0
- Qualifier
- With the exception of amylasee0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“With the exception of amylase, the total amounts per segment of all of the tested enzymes increased due to IAA treatment.”
t0“seedlings of Pisum sativum L. var. Alaska”
Claim · model-written summary
Beta-1,4-glucanase activity per unit protein or fresh weight developed along a sigmoid induction curve.
- Taxon
- Pisum sativum L. var. AlaskaLathyrus oleraceust0
- Gene
- beta-1,4-glucanase (cellulase)e0
- Outcome
- activity per unit of protein or fresh weighte0
- Qualifier
- typical sigmoid induction curvee0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The development of beta-1,4-glucanase (cellulase) activity per unit of protein or fresh weight proceeded according to a typical sigmoid induction curve.”
t0“seedlings of Pisum sativum L. var. Alaska”
Claim · model-written summary
IAA extended pectinase synthesis for at least two days beyond the approximately two days in controls, provided cell division occurred.
- Taxon
- Pisum sativum L. var. AlaskaLathyrus oleraceust0
- Treatment
- IAA treatmente0
- Gene
- Pectinasee0
- Outcome
- continued synthesise0
- Direction
- continuede0
- Value
- at least another 2 dayse0
- Qualifier
- provided cell division took placee0
- Comparator
- control segmentse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Pectinase was formed for about 2 days in control segments and IAA treatment resulted in continued synthesis for at least another 2 days provided cell division took place.”
t0“seedlings of Pisum sativum L. var. Alaska”
Claim · model-written summary
IAA enhanced beta-1,3-glucanase and pectinesterase activities only to the extent that total protein increased.
- Taxon
- Pisum sativum L. var. AlaskaLathyrus oleraceust0
- Treatment
- IAAe0
- Gene
- beta-1,3-glucanase and pectinesterasee0
- Outcome
- beta-1,3-glucanase and pectinesterase activitiese0
- Direction
- enhancede0
- Qualifier
- to the extent that total protein levels increasede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“beta-1,3-glucanase and pectinesterase activities were only enhanced by IAA to the extent that total protein levels increased.”
t0“seedlings of Pisum sativum L. var. Alaska”
The same questions in other papers
indole-3-acetic acid · physiology: antioxidant enzymes · Lathyrus oleraceus (pea)Positive and negative results
1 paper in the same direction as this paper · 1 in the opposite direction
- negative
- positive
indole-3-acetic acid · physiology: enzyme activity · Lathyrus oleraceus (pea)Positive and negative results
3 papers in the same direction as this paper · 2 in the opposite direction
- positive
- positive
- negative
2 papers more in this group
See all 6 papers →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.