Abstract
In both natural and agricultural conditions plants are frequently exposed to environmental stresses. The productivity of plants is greatly affected by various environmental stresses that cause delayed germination, high seedling mortality, stunted growth, poor crop stand and lower yields. The O. biennis L,a medicinal plant was subjected to abiotic stresses, namely water deficit (-0.01 M Pa, -0.03 M Pa, -0.05 M Pa, -0.07 M Pa) and NaCl (25 mM, 50 mM, 75 mM and 100 mM) for long term . So, the present study aimed at determining the impact of water and salinity stress on plant fresh and dry weight, relative water content and membrane stability index after an interval of 30 days i,e. 30, 60, 90,120, 150,180 and 210 days after the induction of water and salinity stress. Increase in fresh weight and dry weight were noticed during the vegetative stage, earlier flowering stage after that biomass productivity decreased both in untreated and treated plants. It is evident from the results that with an increase in the intensity of stress a progressive decrease in the relative water content of leaves and membrane stability Index were noticed under both stress conditions and maximum decrease was noticed at 100 mM NaCl.So,these findings render Oenothera a sensitive plant at higher stress condions. However, changes in characteristics were realistic upto moderate stresses concentrations
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Claims 4
Claim · model-written summary
Fresh and dry weight increased during vegetative and early flowering stages, then biomass declined.
- Taxon
- O. biennis L
_-_flowers_-_geograph.org.uk_-_5527360.jpg?width=60)
Oenothera biennise1 - Organ / stage
- vegetative stagee0
- Outcome
- fresh weight and dry weighte0
- Direction
- Increasee0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
_-_flowers_-_geograph.org.uk_-_5527360.jpg?width=500)
Verbatim
e0“Increase in fresh weight and dry weight were noticed during the vegetative stage, earlier flowering stage after that biomass productivity decreased both in untreated and treated plants.”
e1“The O. biennis L,a medicinal plant”
Claim · model-written summary
Leaf relative water content progressively decreased as stress intensity increased.
- Taxon
- O. biennis LOenothera biennise1
- Treatment
- stresse0
- Outcome
- relative water content of leavese0
- Direction
- decreasee0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“with an increase in the intensity of stress a progressive decrease in the relative water content of leaves and membrane stability Index were noticed under both stress conditions”
e1“The O. biennis L,a medicinal plant”
Claim · model-written summary
Membrane stability index progressively decreased with stress intensity.
- Taxon
- O. biennis LOenothera biennise1
- Treatment
- stresse0
- Outcome
- membrane stability Indexe0
- Direction
- decreasee0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“with an increase in the intensity of stress a progressive decrease in the relative water content of leaves and membrane stability Index were noticed under both stress conditions”
e1“The O. biennis L,a medicinal plant”
Claim · model-written summary
The maximum decrease occurred at 100 mM NaCl.
- Taxon
- O. biennis LOenothera biennise1
- Treatment
- 100 mM NaCle0
- Outcome
- maximum decreasee0
- Direction
- decreasee0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“maximum decrease was noticed at 100 mM NaCl”
e1“The O. biennis L,a medicinal plant”