Germination, growth, photosynthesis and ionic balance in<i>Setaria viridis</i>seedlings subjected to saline and alkaline stress
Bibliographic record
Abstract
Guo, R., Zhou, J., Hao, W., Gong, D., Zhong, X., Gu, F., Liu, Q., Xia, X., Tian, J. and Li, H. 2011. Germination, growth, photosynthesis and ionic balance in Setaria viridis seedlings subjected to saline and alkaline stress. Can. J. Plant Sci. 91: 1077–1088. Setaria viridis seeds and seedlings were subjected to saline and alkaline stress to determine their effects on germination and growth indices, and physiological parameters. The treatments consisted of solutions of NaCl:Na 2 SO 4 for saline stress and NaHCO 3 :Na 2 CO 3 for alkaline stress, at different concentrations. Germination, growth, photosynthesis, chlorophyll fluorescence and ionic balance were determined to elucidate the difference in the mechanism of saline and alkaline stress damage to S. viridis seedlings, and their physiological adaptive mechanism to stress. Germination indices decreased and, germ and root growth were severely inhibited with increased concentrations, especially under alkaline stress. We also found that alkaline stress had a more severe effect on S. viridis seedlings than saline stress, which was demonstrated by greater reduction in relative growth rate, water content and root system activity. Similarly, the reduction in photosynthesis and chlorophyll fluorescence was greater under alkaline than saline stress. Alkaline stress also appeared to exacerbate the ionic imbalance generated by saline stress; alkaline stress caused a heavy precipitate of phosphate and metal ions, excluding Na + and K + , and the loss of NO 3 − and H 2 PO 4 − , which caused a sharp decrease in ionic activity and free concentrations of various ions. Our results suggest that damage caused by alkaline stress might come from greater influx of Na + than caused by saline stress. Setaria viridis responds by synthesizing greater amounts of organic acids than are required to counter salinity to address the intracellular ion imbalance; this process is at the cost of the plant's already diminished energy resource.
Fetched live from OpenAlex and de-inverted. Abstracts are not stored in this database: the inverted indexes are 8.6 GB of the frame’s 9.3 GB of text, and the host has 13 GB free.
How this classification was reachedexpand
Full frame distilled prediction
Teacher imitationNot calibrated prevalence, not ground truth. Human validation pending. Learned from the 10,348 direct Codex labels and 10,348 direct Gemma labels. Candidate is the union of thresholded teacher heads; consensus is their intersection. These outputs are machine_predicted_unvalidated and are not human labels or direct frontier model labels.
Codex and Gemma teacher scores by category
| Category | Codex | Gemma |
|---|---|---|
| Metaresearch | 0.001 | 0.000 |
| Meta-epidemiology (narrow) | 0.000 | 0.000 |
| Meta-epidemiology (broad) | 0.000 | 0.000 |
| Bibliometrics | 0.000 | 0.001 |
| Science and technology studies | 0.000 | 0.000 |
| Scholarly communication | 0.000 | 0.000 |
| Open science | 0.000 | 0.000 |
| Research integrity | 0.000 | 0.000 |
| Insufficient payload (model declined to judge) | 0.000 | 0.000 |
Machine scores (provisional)
The two teacher heads of the student model, read on this work. A score orders the frame for review; it never asserts a category, and the validation status ships verbatim with every row.
Baseline scores from an immature model (maturity gate not passed, 7 training rounds). Scores rank; they never assert a category.
score_only:v0-immature-baseline · verbatim from the scoring run: score_only means the number may rank works, and no category label ships from itClassification
machine, unvalidatedMachine predicted; a candidate call from one teacher head, not a consensus.
How this classification was reached, model by model and score by score, is at the end of the page under "How this classification was reached".