Claim · model-written summary
Increasing cadmium stress gradually decreased tobacco dry weight production.
Nicotiana tabacumVerbatim
e0“Thirty-day-old tobacco seedlings (Nicotiana tabaccum, Bureley v) were subjected during one week to increasing cadmium (Cd) concentrations (0, 10, 20, 50 and 100 M CdCl 2 ). Increasing Cd stress led to a gradual decrease of dry weight (DW) production”
Title
Effect of Cadmium Repartition on Nitrogen Metabolism in Tobacco Seedlings
Houda Maaroufi Dguimi; Khulud Alshehri; Chokri Zaghdoud; et al. OALib 2019. doi:10.4236/oalib.1104000
Other claims from this paper (13)
- Intervention effect Increasing cadmium stress gradually decreased water content.
- Intervention effect Increasing cadmium stress gradually decreased nitrate content.
- Observation More than half the cadmium accumulated per plant was sequestered in oldest leaves.
- Observation S 1 leaves were least affected by cadmium stress.
- Intervention effect Nitrate reductase activity was least reduced in S 1 leaves despite high cadmium.
- Intervention effect Nitrite reductase activity was least reduced in S 1 leaves despite high cadmium.
- Intervention effect At 100 M Cd, S 1 glutamine synthetase activity doubled relative to control.
- Association S 1 glutamine synthetase induction correlated with GS 1 and GS 2 protein accumulation.
- Observation Young S 3 leaves were more affected by cadmium than old leaves.
- Association S 3 glutamine synthetase reduction correlated with GS 2 protein decrease.
- Mechanism Authors interpret cadmium sequestration in old leaves as protection of younger leaves.
- Recommendation S 1 leaves are proposed as indicators of soil cadmium contamination.
- Mechanism S 1 leaves may adapt to partly inactivate cadmium while maintaining nitrogen metabolism.