Abstract
The aim of this study is to compare the water and photosynthetic characteristics of two xerophilic ecotypes of Atriplex halimus (L.). Seeds collected from two different sites Djelfa and Oran are germinated in controlled greenhouse. After 6 months, the plantlets were treated 21 days with increasing concentrations of abscisic acid (0M, 10-6 M and 10-3 M). The results show that ecotype of Djelfa reduced water loss through transpiration because of high stomatal resistance. Consequently the content of chlorophyll a and b decrease significantly compared to Oran ecotype which show an increase of the osmotic potential and relative water content. Osmotic adjustment to reduce dehydration and maintain a good photosynthesis seems efficient in Oran ecotype.Keywords: Phytohormone; drought; xerophyte; water status; stomatal resistance; chlorophyll
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Claims 4
Claim · model-written summary
The Djelfa ecotype of Atriplex halimus reduced water loss through transpiration because of high stomatal resistance.
- Taxon
- Atriplex halimus
Atriplex halimust0 - Material
- ecotype of Djelfae1
- Outcome
- water loss through transpiratione1
- Direction
- reducede1
- Qualifier
- because of high stomatal resistancee1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Atriplex halimus”
e1“The results show that ecotype of Djelfa reduced water loss through transpiration because of high stomatal resistance”
Claim · model-written summary
Chlorophyll a and b content decreased significantly in the Djelfa ecotype compared with the Oran ecotype.
- Taxon
- Atriplex halimusAtriplex halimust0
- Material
- ecotype of Djelfae1
- Outcome
- content of chlorophyll a and be2
- Direction
- decreasee2
- Comparator
- Oran ecotypee2
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Atriplex halimus”
e1“The results show that ecotype of Djelfa reduced water loss through transpiration because of high stomatal resistance”
e2“Consequently the content of chlorophyll a and b decrease significantly compared to Oran ecotype which show an increase of the osmotic potential and relative water content”
Claim · model-written summary
The Oran ecotype showed an increase in osmotic potential and relative water content.
- Taxon
- Atriplex halimusAtriplex halimust0
- Material
- Oran ecotypee2
- Outcome
- osmotic potential and relative water contente2
- Direction
- increasee2
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Atriplex halimus”
e2“Consequently the content of chlorophyll a and b decrease significantly compared to Oran ecotype which show an increase of the osmotic potential and relative water content”
Claim · model-written summary
Osmotic adjustment seems to maintain good photosynthesis in the Oran ecotype.
- Taxon
- Atriplex halimusAtriplex halimust0
- Material
- Oran ecotypee3
- Outcome
- maintain a good photosynthesise3
- Qualifier
- Osmotic adjustment to reduce dehydratione3
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Atriplex halimus”
e3“Osmotic adjustment to reduce dehydration and maintain a good photosynthesis seems efficient in Oran ecotype”