Abstract
Low water availability predicted under climate change is a major abiotic factor limiting plants growth and productivity. In this study a greenhouse experiment was conducted on three important tree species of arid environment: Conocarpus erectus (CE), Acacia modesta (AM), and Salix tetrasperma (ST). Young saplings were subjected to control (C), medium (MWD) and severe soil water deficit (SWD) treatments and response was evaluated. Results showed that in all the three species leaf, stem and root dry weight production remained similar to C under MWD treatment but decreased significantly under SWD. The highest decrease in total dry weight was noticed in ST and the lowest was evidenced in AM under SWD. Root:shoot ratio increased significantly in both CE and AM under MWD and SWD. Furthermore, chlorophyll content decreased while proline content increased significantly in both MWD and SWD treatments. The production of oxidants (hydrogen peroxide and superoxide anions) and antioxidants (superoxide dismutase, catalase, peroxidase and ascorbate peroxidase) increased significantly under both MWD and SWD treatments and were the highest in AM in both MWD and SWD treatments. Therefore, we may conclude that all the three species can tolerate medium water stress due to increased root production and an effective antioxidant defense mechanism.
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Claims 13
Claim · model-written summary
Leaf, stem, and root dry weight remained similar to control under medium water deficit in all three species.
- Taxon
- Conocarpus erectus
Conocarpus erectust0 - Treatment
- MWD treatmente0
- Outcome
- leaf, stem and root dry weight productione0
- Direction
- remained similare0
- Comparator
- Ce0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“in all the three species leaf, stem and root dry weight production remained similar to C under MWD treatment”
t0“Conocarpus erectus”
Claim · model-written summary
Leaf, stem, and root dry weight decreased significantly under severe water deficit in all three species.
- Taxon
- Acacia modesta
Senegalia modestat0 - Treatment
- SWDe0
- Outcome
- leaf, stem and root dry weight productione0
- Direction
- decreasede0
- Comparator
- Ce0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“in all the three species leaf, stem and root dry weight production remained similar to C under MWD treatment but decreased significantly under SWD”
t0“Acacia modesta”
Claim · model-written summary
The greatest total dry weight decrease under severe deficit occurred in Salix tetrasperma.
- Taxon
- Salix tetrasperma
Salix tetraspermat0 - Treatment
- SWDe0
- Outcome
- total dry weighte0
- Direction
- highest decreasee0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The highest decrease in total dry weight was noticed in ST and the lowest was evidenced in AM under SWD”
t0“Salix tetrasperma”
Claim · model-written summary
The smallest total dry weight decrease under severe deficit occurred in Acacia modesta.
- Taxon
- Acacia modestaSenegalia modestat0
- Treatment
- SWDe0
- Outcome
- total dry weighte0
- Direction
- loweste0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The highest decrease in total dry weight was noticed in ST and the lowest was evidenced in AM under SWD”
t0“Acacia modesta”
Claim · model-written summary
Conocarpus erectus root:shoot ratio increased significantly under medium and severe water deficit.
- Taxon
- Conocarpus erectusConocarpus erectust0
- Treatment
- MWD and SWDe0
- Outcome
- Root:shoot ratioe0
- Direction
- increasede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Root:shoot ratio increased significantly in both CE and AM under MWD and SWD”
t0“Conocarpus erectus”
Claim · model-written summary
Acacia modesta root:shoot ratio increased significantly under medium and severe water deficit.
- Taxon
- Acacia modestaSenegalia modestat0
- Treatment
- MWD and SWDe0
- Outcome
- Root:shoot ratioe0
- Direction
- increasede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Root:shoot ratio increased significantly in both CE and AM under MWD and SWD”
t0“Acacia modesta”
Claim · model-written summary
Chlorophyll content decreased under medium and severe water deficit.
- Taxon
- Conocarpus erectusConocarpus erectust0
- Treatment
- MWD and SWD treatmentse0
- Outcome
- chlorophyll contente0
- Direction
- decreasede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“chlorophyll content decreased while proline content increased significantly in both MWD and SWD treatments”
t0“Conocarpus erectus”
Claim · model-written summary
Proline content increased significantly under medium and severe water deficit.
- Taxon
- Conocarpus erectusConocarpus erectust0
- Treatment
- MWD and SWD treatmentse0
- Outcome
- proline contente0
- Direction
- increasede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“chlorophyll content decreased while proline content increased significantly in both MWD and SWD treatments”
t0“Conocarpus erectus”
Claim · model-written summary
Hydrogen peroxide and superoxide anion production increased significantly under medium and severe water deficit.
- Taxon
- Acacia modestaSenegalia modestat0
- Treatment
- MWD and SWD treatmentse0
- Outcome
- production of oxidants (hydrogen peroxide and superoxide anions)e0
- Direction
- increasede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The production of oxidants (hydrogen peroxide and superoxide anions) and antioxidants (superoxide dismutase, catalase, peroxidase and ascorbate peroxidase) increased significantly under both MWD and SWD treatments”
t0“Acacia modesta”
Claim · model-written summary
Superoxide dismutase, catalase, and peroxidase production increased significantly under medium and severe deficit.
- Taxon
- Acacia modestaSenegalia modestat0
- Treatment
- MWD and SWD treatmentse0
- Outcome
- superoxide dismutase, catalase, peroxidasee0
- Direction
- increasede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The production of oxidants (hydrogen peroxide and superoxide anions) and antioxidants (superoxide dismutase, catalase, peroxidase and ascorbate peroxidase) increased significantly under both MWD and SWD treatments”
t0“Acacia modesta”
Claim · model-written summary
Ascorbate peroxidase production increased significantly under medium and severe deficit.
- Taxon
- Acacia modestaSenegalia modestat0
- Treatment
- MWD and SWD treatmentse0
- Outcome
- ascorbate peroxidasee0
- Direction
- increasede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The production of oxidants (hydrogen peroxide and superoxide anions) and antioxidants (superoxide dismutase, catalase, peroxidase and ascorbate peroxidase) increased significantly under both MWD and SWD treatments”
t0“Acacia modesta”
Claim · model-written summary
Oxidant and antioxidant production was highest in Acacia modesta under medium and severe deficit.
- Taxon
- Acacia modestaSenegalia modestat0
- Treatment
- MWD and SWD treatmentse0
- Outcome
- production of oxidantse0
- Direction
- higheste0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The production of oxidants (hydrogen peroxide and superoxide anions) and antioxidants (superoxide dismutase, catalase, peroxidase and ascorbate peroxidase) increased significantly under both MWD and SWD treatments and were the highest in AM in both MWD and SWD treatments”
t0“Acacia modesta”
Claim · model-written summary
The authors concluded all three species tolerate medium water stress through root production and antioxidant defense.
- Taxon
- Conocarpus erectusConocarpus erectust0
- Outcome
- tolerate medium water stresse0
- Qualifier
- increased root production and an effective antioxidant defense mechanisme0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“all the three species can tolerate medium water stress due to increased root production and an effective antioxidant defense mechanism”
t0“Conocarpus erectus”