Abstract
5 lines of Tunisian varieties of chickpea (Cicer arietinum L.) inoculated with Mesorhizobium ciceri UPMCa7 were monitored during the vegetative stage on sterilized sandy soil. 2 levels of soil moisture were compared (100 and 33% of field capacity). The work was aimed at assessing the relative tolerance of these lines to drought and then, to research relationships between the level of sensitivity of plant growth and N content to drought and nodule, leaf and root traits. Drought limited plant growth of Amdoun and Neyer and decreased N content of Chetoui, Amdoun and Neyer. The latter N shortage was associated with increase in nodule mortality and restriction of nodule growth. In view of their minimal decrease in plant biomass and N content, Beja and Kesseb were the most tolerant varieties. Inter-varietal differences for water stress effects on nodule, root and leaf traits were limited to (i) change in root to shoot ratio (ii) loss of chlorophylls and (iii) nodule mortality. Each of these traits was considered as an indicator of stress tolerance. These indicators predict that the most tolerant variety was Beja based on higher increase in root to shoot ratio and Beja and Kesseb based on lower nodule mortality. When choice of the varieties should depend on the likelihood of water stress during the culture, Amdoun which presented the higher biomass per plant and the higher nitrogen content in control condition and ranked similarly to all other varieties in stress condition might represent a reasonable trade-off between high growth and stress tolerance when the probability of water stress to occur during the culture period is low.
Abstract from the paper’s OpenAlex record, shown for indexing and research. Copyright remains with the authors or the publisher. Read at the source ↗
The text the model read, with the source record’s inline markup (italics, sub- and superscripts) rendered and its character entities decoded; quote offsets refer to the raw text.
Claims 17
Claim · model-written summary
Drought limited Amdoun growth.
Not reportedTaxonComparator
Verbatim
e0“Drought limited plant growth of Amdoun and Neyer”
Claim · model-written summary
Drought limited Neyer growth.
Not reportedTaxonComparator
Verbatim
e0“Drought limited plant growth of Amdoun and Neyer”
Claim · model-written summary
Drought decreased Chetoui nitrogen content.
Not reportedTaxonTreatmentComparator
Verbatim
e0“decreased N content of Chetoui, Amdoun and Neyer.”
Claim · model-written summary
Drought decreased Amdoun nitrogen content.
Not reportedTaxonTreatmentComparator
Verbatim
e0“decreased N content of Chetoui, Amdoun and Neyer.”
Claim · model-written summary
Drought decreased Neyer nitrogen content.
Not reportedTaxonTreatmentComparator
Verbatim
e0“decreased N content of Chetoui, Amdoun and Neyer.”
Claim · model-written summary
Nitrogen shortage was associated with increased nodule mortality.
Not reportedTaxon
Verbatim
e0“The latter N shortage was associated with increase in nodule mortality and restriction of nodule growth.”
Claim · model-written summary
Nitrogen shortage was associated with restricted nodule growth.
Not reportedTaxon
Verbatim
e0“The latter N shortage was associated with increase in nodule mortality and restriction of nodule growth.”
Claim · model-written summary
Beja and Kesseb were the most drought-tolerant based on minimal biomass and nitrogen-content decreases.
Not reportedTaxonDirection
Verbatim
e0“In view of their minimal decrease in plant biomass and N content, Beja and Kesseb were the most tolerant varieties.”
Claim · model-written summary
Root-to-shoot ratio change differed among varieties under water stress.
- Outcome
- change in root to shoot ratioe0
Not reportedTaxonDirection
Verbatim
e0“Inter-varietal differences for water stress effects on nodule, root and leaf traits were limited to (i) change in root to shoot ratio (ii) loss of chlorophylls and (iii) nodule mortality.”
Claim · model-written summary
Chlorophyll loss differed among varieties under water stress.
Not reportedTaxon
Verbatim
e0“Inter-varietal differences for water stress effects on nodule, root and leaf traits were limited to (i) change in root to shoot ratio (ii) loss of chlorophylls and (iii) nodule mortality.”
Claim · model-written summary
Nodule mortality differed among varieties under water stress.
- Outcome
- nodule mortalitye0
Not reportedTaxonDirection
Verbatim
e0“Inter-varietal differences for water stress effects on nodule, root and leaf traits were limited to (i) change in root to shoot ratio (ii) loss of chlorophylls and (iii) nodule mortality.”
Claim · model-written summary
A greater root-to-shoot ratio increase identified Beja as most tolerant.
Not reportedTaxonDirection
Verbatim
e0“the most tolerant variety was Beja based on higher increase in root to shoot ratio”
Claim · model-written summary
Lower nodule mortality identified Beja and Kesseb as most tolerant.
Not reportedTaxon
Verbatim
e0“Beja and Kesseb based on lower nodule mortality.”
Claim · model-written summary
Amdoun had higher biomass per plant under control conditions.
Not reportedTaxon
Verbatim
e0“Amdoun which presented the higher biomass per plant and the higher nitrogen content in control condition”
Claim · model-written summary
Amdoun had higher nitrogen content under control conditions.
Not reportedTaxon
Verbatim
e0“Amdoun which presented the higher biomass per plant and the higher nitrogen content in control condition”
Claim · model-written summary
Amdoun ranked similarly to other varieties under stress.
Not reportedTaxon
Verbatim
e0“ranked similarly to all other varieties in stress condition”
Claim · model-written summary
Amdoun may offer a growth–tolerance trade-off where drought probability is low.
- Material
- Amdoune0
- Outcome
- reasonable trade-off between high growth and stress tolerancee0
- Qualifier
- probability of water stress to occur during the culture period is lowe0
Not reportedTaxon
Verbatim
e0“Amdoun which presented the higher biomass per plant and the higher nitrogen content in control condition and ranked similarly to all other varieties in stress condition might represent a reasonable trade-off between high growth and stress tolerance when the probability of water stress to occur during the culture period is low.”