Effects of Salt-alkaline Stress on Chlorophyll Fluorescence Characteristics in Leaves of Chieh-qua Seedlings
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Bibliographic record
Abstract
To explore the effect of salt-alkaline stress on the growth and chlorophyll fluorescence characteristics of Chieh-qua seedlings, the Chieh-qua inbred line "C-39" was used as the experimental material, nutrient solution culture was used for the experiment, and different concentrations of alkaline salts NaHCO 3 (0, 25, 50, 75, 100, 125 mmol/L) were used for gradient treatment. The results showed that the biomass, plant height and stem thickness of the seedlings showed a decreasing trend with the increase of NaHCO 3 concentration, which means that the salt stress seriously inhibited the growth of the seedlings. High concentration of NaHCO 3 significantly inhibited the activity of PSII, when the concentration of NaHCO 3 reached 75 mmol/L, Fv/Fm and PIabs were significantly lower than CK, while low concentration of NaHCO 3 treatment had no significant effect on the activity of PSII. Analysis of JIP-test showed that the relative variable fluorescence VL, VK, VJ and VI at 0.15, 0.3, 2 and 30 ms on the OJIP curve were significantly higher than CK when the concentration of NaHCO 3 reached 75 mmol/L, but there were no significant differences between low concentrations. It was explained that high concentration of NaHCO 3 treatment inhibited the electron transport of PSII. The increase of VJ was greater than that of VK, indicating that the damage caused by NaHCO 3 stress on the donor side was greater than that in the receptor side of the Chieh-qua seedlings. Moreover, the optical energy absorption and distribution in leaves of Chieh-qua seedlings were significantly influenced by high NaHCO 3 concentrations treatment. The concentration of reaction centers RC/CSm (Expressed as per unit leaf area) and the proportion of absorbed light energy used for electron transport were decreased. In summary, NaHCO 3 treatment inhibited the growth of Chieh-qua seedlings and high-concentration NaHCO 3 treatment severely inhibited the Chieh-qua seedlings’ photosynthesis. This study provides a theoretical basis for the creation of salt-tolerant Chieh-qua germplasm resources by studying the effects of different concentrations of alkaline salt stress on the growth and photosynthetic performance of seedlings.
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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 | 0.001 |
| 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 it