Abstract
Aim of the study: To evaluate the morpho-physiological changes of Acacia auriculiformis in response to seawater induced salinity stress along with its tolerance limit.Area of study: Bangabandhu Sheikh Mujibur Rahman Agricultural University, Bangladesh.Material and methods: Three saline treatments (4, 8, 12 dS m-1) were applied to six-month aged Acacia auriculiformis seedlings from January 2014 to June 2014 and the tap water was used as control treatment. To observe salinity effects, the following parameters were measured by using various established techniques: plant height and leaf number, plant biomass, shoot and root distribution as well as shoot and root density, water uptake capacity (WUC), water saturation deficit (WSD) and water retention capacity (WRC), exudation rate, and cell membrane stability.Main results: Diluted seawater caused a notable reduction in shoot and root distribution in addition to shoot and root density, though plant height, leaf number and plant biomass were found to be decreased to some extent compared to control plants. Water status of the plant also altered when plants were subjected to salinity stress. Nevertheless, membrane stability revealed good findings towards salinity tolerance.Research highlights: Considering the above facts, despite salinity exerts some negative effects on overall plant performance, interestingly the percent reduction value doesn’t exceed 50% as compared to control plants, and the plants were successful to tolerate salinity stress till the end of the experiment (150 days) through adopting some tolerance mechanisms.Additional key words: Salt stress; halophytes; growth parameters; WUC; exudation rate; membrane stability.Abbreviations used: BSMRAU (Bangabandhu Sheikh Mujibur Rahman Agricultural University); RCBD (randomized complete block design); DATI (days after treatment imposition); RWC (relative water content); WUC (water uptake capacity); WSD (water saturation deficit); WRC (water retention capacity); FW (fresh weight); DW (dry weight); TW (turgid weight); ROS (reactive oxygen species).
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Claims 6
Claim · model-written summary
Diluted seawater notably reduced Acacia shoot and root distribution and density.
- Taxon
- Acacia auriculiformis
Acacia auriculiformise1 - Treatment
- Diluted seawatere0
- Outcome
- shoot and root distribution in addition to shoot and root densitye0
- Direction
- reductione0
- Comparator
- tap watere2
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Diluted seawater caused a notable reduction in shoot and root distribution in addition to shoot and root density”
e1“Acacia auriculiformis seedlings”
e2“tap water was used as control treatment”
Claim · model-written summary
Seawater salinity decreased Acacia height, leaf number, and biomass to some extent compared with controls.
- Taxon
- Acacia auriculiformisAcacia auriculiformise1
- Treatment
- saline treatments (4, 8, 12 dS m-1)e2
- Outcome
- plant height, leaf number and plant biomasse0
- Direction
- decreasede0
- Qualifier
- to some extente0
- Comparator
- control plantse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“plant height, leaf number and plant biomass were found to be decreased to some extent compared to control plants”
e1“Acacia auriculiformis seedlings”
e2“Three saline treatments (4, 8, 12 dS m-1) were applied”
Claim · model-written summary
Acacia water status changed under salinity stress.
- Taxon
- Acacia auriculiformisAcacia auriculiformise1
- Treatment
- salinity stresse0
- Outcome
- Water statuse0
- Direction
- alterede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Water status of the plant also altered when plants were subjected to salinity stress”
e1“Acacia auriculiformis seedlings”
Claim · model-written summary
Acacia membrane stability indicated tolerance to salinity.
- Taxon
- Acacia auriculiformisAcacia auriculiformise1
- Outcome
- membrane stabilitye0
- Direction
- good findingse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“membrane stability revealed good findings towards salinity tolerance”
e1“Acacia auriculiformis seedlings”
Claim · model-written summary
The reduction in overall Acacia performance under salinity remained below 50% versus controls.
- Taxon
- Acacia auriculiformisAcacia auriculiformise1
- Treatment
- salinitye0
- Outcome
- overall plant performancee0
- Direction
- reductione0
- Value
- 50%e0
- Comparator
- control plantse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“salinity exerts some negative effects on overall plant performance, interestingly the percent reduction value doesn’t exceed 50% as compared to control plants”
e1“Acacia auriculiformis seedlings”
Claim · model-written summary
Acacia plants tolerated salinity through the end of the 150-day experiment.
- Taxon
- Acacia auriculiformisAcacia auriculiformise1
- Outcome
- tolerate salinity stresse0
- Value
- 150 dayse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“the plants were successful to tolerate salinity stress till the end of the experiment (150 days)”
e1“Acacia auriculiformis seedlings”
The same questions in other papers
salinity · growth · Acacia auriculiformisPositive and negative results
1 paper in the same direction as this paper · 1 in the opposite direction
- positive
- negative
Claims are grouped by organism, treatment and what was measured or targeted. A paper counts as positive when any of its claims in the group is positive.