Abstract
To optimize a reproductive-stage-specific phenotyping protocol and isolate potential determinants conferring salinity tolerance in wheat, two consecutive experiments were conducted using salt-tolerant varieties (Binagom-1 and BARI Gom 25) and a sensitive variety (BARI Gom 20). In the first experiment, seedlings were grown hydroponically, and 14-day-old seedlings were subjected to two different levels of salt stress (EC=12 dS/m and 16 dS/m) for 7 days. Based on the results of tolerant and susceptible varieties, parameters such as root and shoot weight, shoot Na+/K+ ratio, chlorophyll content, proline content, methylglyoxal content, H2O2 content and lipid peroxidation content and the activities of enzymes such as ascorbate peroxidase, peroxidase, and glyoxalase I were considered as potential determinants of salt tolerance. The second experiment employed four leaf cutting treatments under both control and salinity stress conditions. Seedlings were grown in perforated pots filled with field soil, and at the heading stage, plants were subjected to salt stress (12 dS/m) after trimming as indicated. The combined analysis of control and salt stress data obtained from setup B reflected a significant decrease in yield and yield-attributing traits; however, a lesser decrease was observed in tolerant varieties. Correlation studies revealed that grain yield per spike exhibited a significant positive correlation with the number of seeds per spike, spike weight, plant height, and days to first flowering under both stress and control conditions. Additionally, different stress tolerance indices also supported the results of reproductive stage phenotyping. However, further studies will be required to tag the genes/QTLs controlling salinity tolerance in wheat at various growth phases.
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Claims 8
Claim · model-written summary
Multiple seedling growth, ion and biochemical traits were identified as potential salt tolerance determinants.
- Taxon
- wheat
Triticum aestivumt0 - Outcome
- root and shoot weight, shoot Na+/K+ ratio, chlorophyll contente0
- Qualifier
- potential determinants of salt tolerancee0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“parameters such as root and shoot weight, shoot Na+/K+ ratio, chlorophyll content, proline content, methylglyoxal content, H2O2 content and lipid peroxidation content and the activities of enzymes such as ascorbate peroxidase, peroxidase, and glyoxalase I were considered as potential determinants of salt tolerance.”
t0“wheat”
Claim · model-written summary
Salt stress significantly reduced yield and yield-attributing traits in setup B.
- Taxon
- wheatTriticum aestivumt0
- Treatment
- salt stresse0
- Outcome
- yield and yield-attributing traitse0
- Direction
- decreasee0
- Qualifier
- setup Be0
- Comparator
- controle0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“control and salt stress data obtained from setup B reflected a significant decrease in yield and yield-attributing traits”
t0“wheat”
Claim · model-written summary
Tolerant varieties had a lesser yield decrease under salt stress.
- Taxon
- wheatTriticum aestivumt0
- Material
- tolerant varietiese0
- Outcome
- decreasee0
- Direction
- lessere0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“a lesser decrease was observed in tolerant varieties.”
t0“wheat”
Claim · model-written summary
Grain yield per spike correlated positively with seed number per spike.
- Taxon
- wheatTriticum aestivumt0
- Organ / stage
- seeds per spikee0
- Outcome
- grain yield per spikee0
- Direction
- positive correlatione0
- Qualifier
- under both stress and control conditionse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“grain yield per spike exhibited a significant positive correlation with the number of seeds per spike, spike weight, plant height, and days to first flowering under both stress and control conditions.”
t0“wheat”
Claim · model-written summary
Grain yield per spike correlated positively with spike weight.
- Taxon
- wheatTriticum aestivumt0
- Organ / stage
- spike weighte0
- Outcome
- grain yield per spikee0
- Direction
- positive correlatione0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“grain yield per spike exhibited a significant positive correlation with the number of seeds per spike, spike weight, plant height, and days to first flowering under both stress and control conditions.”
t0“wheat”
Claim · model-written summary
Grain yield per spike correlated positively with plant height.
- Taxon
- wheatTriticum aestivumt0
- Material
- plant heighte0
- Outcome
- grain yield per spikee0
- Direction
- positive correlatione0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“grain yield per spike exhibited a significant positive correlation with the number of seeds per spike, spike weight, plant height, and days to first flowering under both stress and control conditions.”
t0“wheat”
Claim · model-written summary
Grain yield per spike correlated positively with days to first flowering.
- Taxon
- wheatTriticum aestivumt0
- Organ / stage
- days to first floweringe0
- Outcome
- grain yield per spikee0
- Direction
- positive correlatione0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“grain yield per spike exhibited a significant positive correlation with the number of seeds per spike, spike weight, plant height, and days to first flowering under both stress and control conditions.”
t0“wheat”
Claim · model-written summary
Stress tolerance indices supported reproductive-stage phenotyping results.
- Taxon
- wheatTriticum aestivumt0
- Outcome
- results of reproductive stage phenotypinge0
- Comparator
- stress tolerance indicese0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“different stress tolerance indices also supported the results of reproductive stage phenotyping.”
t0“wheat”
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