Abstract
Poplars are widely utilized in the intensive and biomass production, as well as in breeding and environment protection programs. This experiment was performed to investigate the effect of drought stress on poplar clones (M-1, PE19/66 and B-229). Poplar clones were grown hydroponically under controlled conditions and exposed to drought stress by applying polyethylene glycol (PEG) 6000. The plant samples were collected and separated into roots and leaves. For estimation of antioxidant status, activities of different antioxidant enzymes were determined (superoxide dismutase (SOD), catalase (CAT), guaiacol peroxidase (POD), glutathione peroxidase (GPX), glutathione reductase (GR) and ascorbate peroxidase (APX)), as well as antiradical power (ARP) against hydroxyl (˙OH) radical using ESR spin-trapping. The water stress parameters proline (PRO) content, activity of proline dehydrogenase (PDH) and glycine betaine (GB) content were determined. Drought stress had significant effects on PRO and GB contents, SOD, APX and CAT activities when compared to control. All investigated extracts were determined as good inhibitors for ˙OH radical reduction, especially clone M-1where there was an increase of ARP against ˙OH radical in drought condition what could help to prevent or meliorate oxidative damage. Results indicated that the M-1 clone had a greater accumulation of substances for osmotic adjustment and a more efficient enzymatic detoxification cycle for eliminating the negative effects caused by ROS under drought stress than clones B-229 and PE19/66. This study provides valuable information for understanding drought - responsive mechanisms in leaves and roots of poplar clones M-1, B-229 and PE19/66. Key words: antioxidant enzymes, climate change, drought, glycine betaine, proline.
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Claims 6
Claim · model-written summary
Drought stress significantly affected proline and glycine betaine contents in poplar compared with control.
PopulusNot reportedDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“poplar cuttings”
e1“Drought stress had significant effects on PRO and GB contents, SOD, APX and CAT activities when compared to control”
Claim · model-written summary
Drought stress significantly affected SOD, APX and CAT activities in poplar compared with control.
Not reportedDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“poplar cuttings”
e1“Drought stress had significant effects on PRO and GB contents, SOD, APX and CAT activities when compared to control”
Claim · model-written summary
Clone M-1 showed an increase of ARP against hydroxyl radical under drought condition.
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“poplar cuttings”
e2“especially clone M-1where there was an increase of ARP”
e4“in drought condition what could help to prevent or meliorate oxidative damage”
Claim · model-written summary
Clone M-1 had a greater accumulation of osmotic adjustment substances under drought than clones B-229 and PE19/66.
- Material
- M-1 clonee3
- Treatment
- drought stresse3
- Outcome
- accumulation of substances for osmotic adjustmente3
- Direction
- greatere3
- Comparator
- clones B-229 and PE19/66e3
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“poplar cuttings”
e3“Results indicated that the M-1 clone had a greater accumulation of substances for osmotic adjustment and a more efficient enzymatic detoxification cycle for eliminating the negative effects caused by ROS under drought stress than clones B-229 and PE19/66”
Claim · model-written summary
Clone M-1 had a more efficient enzymatic detoxification cycle under drought than clones B-229 and PE19/66.
- Material
- M-1 clonee3
- Treatment
- drought stresse3
- Outcome
- enzymatic detoxification cyclee3
- Direction
- more efficiente3
- Comparator
- clones B-229 and PE19/66e3
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“poplar cuttings”
e3“Results indicated that the M-1 clone had a greater accumulation of substances for osmotic adjustment and a more efficient enzymatic detoxification cycle for eliminating the negative effects caused by ROS under drought stress than clones B-229 and PE19/66”
Claim · model-written summary
All investigated poplar extracts were good inhibitors of hydroxyl radical reduction.
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“poplar cuttings”
e5“All investigated extracts were determined as good inhibitors for ˙OH radical reduction”
The same questions in other papers
drought · physiology: water · Populus (poplar)Positive and negative results
3 papers in the same direction as this paper · 5 in the opposite direction
- negative
- no effect
- negative
5 papers more in this group
See all 9 papers →drought · physiology: enzyme activity · Populus (poplar)Results agree
1 paper in the same direction as this paper
- positive
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.