Abstract
The greatest failure rate of reforestation programs in Algeria is related to the water deficit especially at young plant stage. Hence, the objective of this paper is to study the responses to drought stress generated by three different water regimes 100% (control), 60% (moderate stress) and 40% (severe stress) of field capacity (FC) on 3 young populations of Ceratonia siliqua L. in Algeria with different eco-geographical origins (Zeralda, Tissemsilt and Ain Sefra). The germination seeds of these populations were conducted in February 2013. The results exhibit a significant decrease in stomata conductance (cs) and in relative water content (RWC) with the increase in the intensity of drought stress. Negative and significant correlations were recorded between the RWC and the intensity of drought stress in the studied plants compared to the control plants. A considerable increase of proline and soluble sugar was positively correlated with drought stress severity for the three ecotypes of Ceratonia siliqua L. Significant differences in the chlorophyll and carotenoid content were detected among the three ecotypes in three water regimes. According to the canonical discriminant analysis of our data, the three ecotypes were separated by the physiological and biochemical parameters studied. It is clear that the ability of drought tolerance in the three studied contrasting ecotypes is different. We suggest the following order with respect to the ability of drought tolerance: Ain Sefra -Tissmesilt -Zeralda.
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Claims 9
Claim · model-written summary
Stomatal conductance decreased significantly as drought stress intensified.
- Taxon
- Ceratonia siliqua L.
Ceratonia siliquae1 - Treatment
- drought stresse0
- Outcome
- stomata conductance (cs)e0
- Direction
- decreasee0
- Setting
- Algeriae1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The results exhibit a significant decrease in stomata conductance (cs) and in relative water content (RWC) with the increase in the intensity of drought stress.”
e1“Ceratonia siliqua L. in Algeria”
Claim · model-written summary
Relative water content decreased significantly as drought stress intensified.
- Taxon
- Ceratonia siliqua L.Ceratonia siliquae1
- Treatment
- drought stresse0
- Outcome
- relative water content (RWC)e0
- Direction
- decreasee0
- Setting
- Algeriae1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The results exhibit a significant decrease in stomata conductance (cs) and in relative water content (RWC) with the increase in the intensity of drought stress.”
e1“Ceratonia siliqua L. in Algeria”
Claim · model-written summary
Relative water content was negatively correlated with drought stress intensity.
- Taxon
- Ceratonia siliqua L.Ceratonia siliquae1
- Treatment
- intensity of drought stresse0
- Outcome
- RWCe0
- Direction
- Negativee0
- Comparator
- control plantse0
- Setting
- Algeriae1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Negative and significant correlations were recorded between the RWC and the intensity of drought stress in the studied plants compared to the control plants.”
e1“Ceratonia siliqua L. in Algeria”
Claim · model-written summary
Proline increased with drought stress severity in all three ecotypes.
- Taxon
- Ceratonia siliqua L.Ceratonia siliquae0
- Treatment
- drought stress severitye0
- Outcome
- prolinee0
- Direction
- increasee0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“A considerable increase of proline and soluble sugar was positively correlated with drought stress severity for the three ecotypes of Ceratonia siliqua L.”
Claim · model-written summary
Soluble sugar increased with drought stress severity in all three ecotypes.
- Taxon
- Ceratonia siliqua L.Ceratonia siliquae0
- Treatment
- drought stress severitye0
- Outcome
- soluble sugare0
- Direction
- increasee0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“A considerable increase of proline and soluble sugar was positively correlated with drought stress severity for the three ecotypes of Ceratonia siliqua L.”
Claim · model-written summary
Chlorophyll and carotenoid content differed significantly among ecotypes and water regimes.
- Taxon
- Ceratonia siliqua L.Ceratonia siliquae1
- Treatment
- three water regimese0
- Outcome
- chlorophyll and carotenoid contente0
- Direction
- differencese0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Significant differences in the chlorophyll and carotenoid content were detected among the three ecotypes in three water regimes.”
e1“Ceratonia siliqua L. in Algeria”
Claim · model-written summary
Canonical discriminant analysis separated the three ecotypes using physiological and biochemical parameters.
- Taxon
- Ceratonia siliqua L.Ceratonia siliquae1
- Outcome
- the three ecotypes were separatede0
- Value
- three ecotypese0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“According to the canonical discriminant analysis of our data, the three ecotypes were separated by the physiological and biochemical parameters studied.”
e1“Ceratonia siliqua L. in Algeria”
Claim · model-written summary
Drought tolerance differed among the three ecotypes.
- Taxon
- Ceratonia siliqua L.Ceratonia siliquae1
- Outcome
- ability of drought tolerancee0
- Direction
- differente0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“the ability of drought tolerance in the three studied contrasting ecotypes is different.”
e1“Ceratonia siliqua L. in Algeria”
Claim · model-written summary
Authors suggest the drought tolerance order Ain Sefra, Tissmesilt, then Zeralda.
- Taxon
- Ceratonia siliqua L.Ceratonia siliquae1
- Outcome
- ability of drought tolerance: Ain Sefra -Tissmesilt -Zeraldae0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“We suggest the following order with respect to the ability of drought tolerance: Ain Sefra -Tissmesilt -Zeralda.”
e1“Ceratonia siliqua L. in Algeria”