Abstract
Salt tolerance threshold is a critical parameter for establishing plant salt tolerance, which is generally known as the relative yield response to increase root area salinity. In this study, we focused on relative growth rate (RGR) and salt tolerance index (STI) in Andrographis paniculata (AP). For this purpose, after 30 days from culturing, the seedlings were placed in different salinity levels (0, 4, 8, 12, and 16 dSm-1) on Hoagland medium and were compared at various exposure times (0, 5, 10, 15, and 20 days). The results revealed that salinity, exposure times and their interaction had significant effect on the measured traits. The injurious effects of salinity on RGR during exposure time indicated two specific outcomes: (1) at five days salt exposure during which growth began to decrease due to low osmotic potential, and (2) at 20 days salt exposure which identified reduction rate of yield, which was attributed to toxicity of specific ion. Although, salinity effects on STI were the same among accessions at 5 and 10 days salt exposure; it affected STI at 15 and 20 days, significantly. In view that all the growth indices decreased in sequence of increasing salinity levels, 12 dSm-1 salinity and 15 days stress could be concluded as the extreme salinity level and exposure time.
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Claims 6
Claim · model-written summary
Salinity, exposure time and their interaction significantly affected measured traits.
- Taxon
- Andrographis paniculata
_in_Narshapur_forest%2C_AP_W2_IMG_0867.jpg?width=60)
Andrographis paniculatat0 - Treatment
- salinity, exposure times and their interactione0
- Outcome
- measured traitse0
Not reportedDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
_in_Narshapur_forest%2C_AP_W2_IMG_0867.jpg?width=500)
Verbatim
e0“salinity, exposure times and their interaction had significant effect on the measured traits.”
t0“Andrographis paniculata”
Claim · model-written summary
Growth began to decrease after five days of salt exposure.
- Taxon
- Andrographis paniculataAndrographis paniculatat0
- Treatment
- five days salt exposuree0
- Outcome
- growthe0
- Direction
- decreasee0
- Qualifier
- low osmotic potentiale0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“at five days salt exposure during which growth began to decrease due to low osmotic potential”
t0“Andrographis paniculata”
Claim · model-written summary
Yield reduction was identified at 20 days of salt exposure.
- Taxon
- Andrographis paniculataAndrographis paniculatat0
- Treatment
- 20 days salt exposuree0
- Outcome
- yielde0
- Direction
- reductione0
- Qualifier
- toxicity of specific ione0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“at 20 days salt exposure which identified reduction rate of yield, which was attributed to toxicity of specific ion”
t0“Andrographis paniculata”
Claim · model-written summary
Salinity affected STI significantly at 15 and 20 days.
- Taxon
- Andrographis paniculataAndrographis paniculatat0
- Outcome
- STIe0
- Setting
- 15 and 20 dayse0
Not reportedDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“it affected STI at 15 and 20 days, significantly.”
t0“Andrographis paniculata”
Claim · model-written summary
Growth indices decreased with increasing salinity.
- Taxon
- Andrographis paniculataAndrographis paniculatat0
- Treatment
- increasing salinity levelse0
- Outcome
- growth indicese0
- Direction
- decreasede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“all the growth indices decreased in sequence of increasing salinity levels”
t0“Andrographis paniculata”
Claim · model-written summary
The authors identify 12 dSm-1 and 15 days as extreme salt level and exposure time.
- Taxon
- Andrographis paniculataAndrographis paniculatat0
- Outcome
- extreme salinity level and exposure timee0
- Value
- 12 dSm-1e0
- Qualifier
- 15 days stresse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“12 dSm-1 salinity and 15 days stress could be concluded as the extreme salinity level and exposure time”
t0“Andrographis paniculata”
The same questions in other papers
salinity · growth · Andrographis paniculataResults agree
2 papers in the same direction as this paper
- negative
- 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.