Abstract
The effects of nickel (Ni) on growth, leaf water status, and mineral nutrient concentration were studied in two wheat (Triticum durum Desf.) cultivars with different sensitivity to water stress: ‘Adamello’ [drought sensitive (DS)] and ‘Ofanto’ [drought tolerant, (DT)]. The DT cultivar showed a higher Ni absorption capacity: ‘Ofanto’ seedlings grown in the presence of 35 μM Ni had a 3.5 times greater concentration of Ni in roots than did ‘Adamello’. Despite the greater Ni tissue content, the DT cultivar exhibited better growth and nutritional status when compared to the DS cultivar. In the DS cultivar the concentration of chlorophyll a and b was reduced by Ni treatment. Chlorophyll a concentration decreased in the DT cultivar, but to a lesser extent than in the DS cultivar; chlorophyll b was not altered by Ni level in the DT cultivar. Nickel caused a decrease in the water potential (ψw) and relative water content (RWC) in both cultivars, but these decreases were greater in the DS cultivar. The antioxidative defense enzymes, guaiacol peroxidase, ascorbate peroxidase, and glutathione reductase, showed increased activity in Ni‐treated DS seedlings; this increase in activity was not observed in the DT seedlings. These data suggest that different wheat genotypes may markedly differ in Ni uptake and sensitivity and that a enhanced capacity to counteract Ni stress may be associated with drought resistance.
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Claims 8
Claim · model-written summary
Ofanto seedlings had 3.5 times the root nickel concentration of Adamello at 35 μM Ni.
- Taxon
- durum wheat
Triticum turgidum subsp. durumt0 - Material
- ‘Ofanto’e0
- Treatment
- 35 μM Nie0
- Outcome
- concentration of Ni in rootse0
- Direction
- greatere0
- Value
- 3.5 timese0
- Comparator
- ‘Adamello’e0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“‘Ofanto’ seedlings grown in the presence of 35 μM Ni had a 3.5 times greater concentration of Ni in roots than did ‘Adamello’”
t0“durum wheat”
Claim · model-written summary
Ofanto maintained better growth and nutritional status than Adamello despite more tissue nickel.
- Taxon
- durum wheatTriticum turgidum subsp. durumt0
- Material
- ‘Ofanto’e1
- Outcome
- growth and nutritional statuse0
- Direction
- bettere0
- Comparator
- ‘Adamello’e1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Despite the greater Ni tissue content, the DT cultivar exhibited better growth and nutritional status when compared to the DS cultivar.”
e1“‘Adamello’ [drought sensitive (DS)] and ‘Ofanto’ [drought tolerant, (DT)]”
t0“durum wheat”
Claim · model-written summary
Nickel reduced both chlorophyll a and b in the drought-sensitive cultivar.
- Taxon
- durum wheatTriticum turgidum subsp. durumt0
- Material
- ‘Adamello’e1
- Treatment
- Ni treatmente0
- Outcome
- concentration of chlorophyll a and be0
- Direction
- reducede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“In the DS cultivar the concentration of chlorophyll a and b was reduced by Ni treatment.”
e1“‘Adamello’ [drought sensitive (DS)]”
t0“durum wheat”
Claim · model-written summary
Nickel decreased chlorophyll a in Ofanto, less than in Adamello.
- Taxon
- durum wheatTriticum turgidum subsp. durumt0
- Material
- ‘Ofanto’e1
- Outcome
- Chlorophyll a concentratione0
- Direction
- decreasede0
- Comparator
- ‘Adamello’e1
Not reportedTreatment
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Chlorophyll a concentration decreased in the DT cultivar, but to a lesser extent than in the DS cultivar”
e1“‘Adamello’ [drought sensitive (DS)] and ‘Ofanto’ [drought tolerant, (DT)]”
t0“durum wheat”
Claim · model-written summary
Nickel level did not alter chlorophyll b in Ofanto.
- Taxon
- durum wheatTriticum turgidum subsp. durumt0
- Material
- ‘Ofanto’e1
- Treatment
- Ni levele0
- Outcome
- chlorophyll be0
- Direction
- not alterede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“chlorophyll b was not altered by Ni level in the DT cultivar”
e1“‘Ofanto’ [drought tolerant, (DT)]”
t0“durum wheat”
Claim · model-written summary
Nickel lowered water potential and relative water content in both cultivars, more strongly in Adamello.
- Taxon
- durum wheatTriticum turgidum subsp. durumt0
- Material
- ‘Adamello’ [drought sensitive (DS)] and ‘Ofanto’ [drought tolerant, (DT)]e1
- Treatment
- Nickele0
- Outcome
- water potential (ψw) and relative water content (RWC)e0
- Direction
- decreasee0
- Qualifier
- greater in the DS cultivare0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Nickel caused a decrease in the water potential (ψw) and relative water content (RWC) in both cultivars, but these decreases were greater in the DS cultivar.”
e1“‘Adamello’ [drought sensitive (DS)] and ‘Ofanto’ [drought tolerant, (DT)]”
t0“durum wheat”
Claim · model-written summary
Nickel increased three antioxidative enzyme activities in Adamello seedlings.
- Taxon
- durum wheatTriticum turgidum subsp. durumt0
- Material
- ‘Adamello’e1
- Treatment
- Ni‐treatede0
- Gene
- guaiacol peroxidase, ascorbate peroxidase, and glutathione reductasee0
- Outcome
- activitye0
- Direction
- increasede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“guaiacol peroxidase, ascorbate peroxidase, and glutathione reductase, showed increased activity in Ni‐treated DS seedlings”
e1“‘Adamello’ [drought sensitive (DS)]”
t0“durum wheat”
Claim · model-written summary
The same enzyme activity increase was absent in Ofanto seedlings.
- Taxon
- durum wheatTriticum turgidum subsp. durumt0
- Material
- ‘Ofanto’e1
- Outcome
- increase in activitye0
- Direction
- not observede0
Not reportedTreatmentComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“this increase in activity was not observed in the DT seedlings”
e1“‘Ofanto’ [drought tolerant, (DT)]”
t0“durum wheat”