Abstract
The Cumaru (Dipteryx odorata (Aubl.) Willd.) is a species used by traditional populations and industries using timber and non-timber forest products. This study aimed to analyze the levels of chlorophyll A, B, total ammonia levels, nitrate, proline, electrolyte leakage and activity of oxidative enzymes in evaluation to tolerance of cumaru plants subjected to drought for 21 days of stress. The experiment was conducted in a greenhouse at the Federal Rural University of Amazonia (UFRA), Belém, Pará, in the period from March to July 2015. The results showed a significant decrease in the relative water content of 50.8 and 55% for chlorophyll b, 45% to total chlorophyll and an increase in proline to the plants under drought. There was no significant difference to chlorophyll a, ammonium and nitrate. Increases in electrolyte leak with 22.74% for roots and 39.55% for leaves were observed. The enzyme catalase (CAT) showed a significant increase from the 14th day of the experiment, while changes in superoxide dismutase (SOD) and ascorbate peroxidase (APX) activities were observed from the 7th day of the experiment. Cumaru plants are not drought tolerant over 21 days; also, young plants of cumaru respond negatively to conditions of low water availability in the soil. Key words: Drought, oxidative stress, chlorophyll, tolerance, Dipteryx odorata.
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Claims 10
Claim · model-written summary
Drought significantly decreased relative water content by 50.8%.
- Taxon
- Cumaru
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Dipteryx odoratat0 - Treatment
- droughte1
- Outcome
- relative water contente0
- Direction
- decreasee0
- Value
- 50.8e0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
%2C_Vaca_Diez%2C_Bolivia_1.jpg?width=500)
Verbatim
e0“The results showed a significant decrease in the relative water content of 50.8 and 55% for chlorophyll b”
t0“Cumaru”
e1“45% to total chlorophyll and an increase in proline to the plants under drought”
Claim · model-written summary
Drought significantly decreased chlorophyll b by 55%.
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The results showed a significant decrease in the relative water content of 50.8 and 55% for chlorophyll b”
t0“Cumaru”
e1“45% to total chlorophyll and an increase in proline to the plants under drought”
Claim · model-written summary
Drought decreased total chlorophyll by 45%.
- Taxon
- CumaruDipteryx odoratat0
- Treatment
- droughte0
- Outcome
- total chlorophylle0
- Direction
- decreasee1
- Value
- 45%e0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“45% to total chlorophyll and an increase in proline to the plants under drought”
t0“Cumaru”
e1“The results showed a significant decrease in the relative water content of 50.8 and 55% for chlorophyll b”
Claim · model-written summary
Drought increased proline.
- Taxon
- CumaruDipteryx odoratat0
- Treatment
- droughte0
- Outcome
- prolinee0
- Direction
- increasee0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“an increase in proline to the plants under drought”
t0“Cumaru”
Claim · model-written summary
Chlorophyll a, ammonium and nitrate showed no significant difference.
- Taxon
- CumaruDipteryx odoratat0
- Outcome
- chlorophyll a, ammonium and nitratee0
- Direction
- no significant differencee0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“There was no significant difference to chlorophyll a, ammonium and nitrate.”
t0“Cumaru”
Claim · model-written summary
Electrolyte leakage rose by 22.74% in roots.
- Taxon
- CumaruDipteryx odoratat0
- Organ / stage
- rootse0
- Outcome
- electrolyte leake0
- Direction
- Increasese0
- Value
- 22.74%e0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Increases in electrolyte leak with 22.74% for roots and 39.55% for leaves were observed.”
t0“Cumaru”
Claim · model-written summary
Electrolyte leakage rose by 39.55% in leaves.
- Taxon
- CumaruDipteryx odoratat0
- Organ / stage
- leavese0
- Outcome
- electrolyte leake0
- Direction
- Increasese0
- Value
- 39.55%e0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Increases in electrolyte leak with 22.74% for roots and 39.55% for leaves were observed.”
t0“Cumaru”
Claim · model-written summary
Catalase activity increased significantly from day 14.
- Taxon
- CumaruDipteryx odoratat0
- Outcome
- catalase (CAT)e0
- Direction
- increasee0
- Qualifier
- from the 14th day of the experimente0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The enzyme catalase (CAT) showed a significant increase from the 14th day of the experiment”
t0“Cumaru”
Claim · model-written summary
SOD and APX activities changed from day 7.
- Taxon
- CumaruDipteryx odoratat0
- Outcome
- superoxide dismutase (SOD) and ascorbate peroxidase (APX) activitiese0
- Qualifier
- from the 7th day of the experimente0
Not reportedDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“changes in superoxide dismutase (SOD) and ascorbate peroxidase (APX) activities were observed from the 7th day of the experiment”
t0“Cumaru”
Claim · model-written summary
Young cumaru plants were judged unable to tolerate 21 days of drought.
- Taxon
- CumaruDipteryx odoratae0
- Outcome
- not drought tolerante0
- Qualifier
- over 21 dayse0
Not reportedDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Cumaru plants are not drought tolerant over 21 days; also, young plants of cumaru respond negatively to conditions of low water availability in the soil.”
The same questions in other papers
drought · physiology: water · Dipteryx odorata (cumaru)Results agree
1 paper in the same direction as this paper
- 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.