Responses of Chlorophyll Fluorescence Characteristics in Leaves of Mulberry Seedlings to Alkaline Salt Stress with Different pH Value
Bibliographic record
Abstract
In this paper,taking mulberry seedlings as test material,the effects of diffierent concentration alkaline salt( Na 2 CO 3) stress( Density of concentration was 100 mmol/L and value of pH were 7. 0,8. 0,9. 0 and 10. 0) on chlorophyll content,relative water content,cell membrane permeability changes and Chlorophyll fluorescence characteristics in mulberry seedlings were investigated. The results showd that under the alkaline salt stress with pH values in 7. 09. 0,chlorophyll content and relative water content were reduced smaller,malondialdehyde contents were no apparent increased and peroxidation of membrane were no occurred significantly. Meanwhile,the inhibitions of PSⅡ physiological function were also not being obvious in leaves of mulberry seedlings. However,the leaves of mulberry seedlings could protect normal physiological function of PSⅡ reaction centers by non-radiative energy dissipation mechanism which was xanthophyll-regulated thermal energy dissipation as the main,thus leaves of PS Ⅱ could guarantee the normal capacity of electronic transport and utilization of solar energy. Namely,the PSⅡ in Leaves of Mulberry seedlings had an alkaline salt-tolerance ability in some degree. But when the pH up to 10. 0,membrane systems in leaves of Mulberry seedlings were damaged,leaves water loss were seriously,and Per unit area of chlorophyll content were appreciably reduced which reducing of chlorophyll a content particularly clear. Furthermore,photosynthetic electron transports were hindered in leaves of Mulberry seedlings,and the absolute energy could used in photosynthetic electron transports imcompletely. The non-radiative energy dissipation mechanisms by xanthophyll cycle were inhibited simultaneously,which resulted in an accumulated excess light energy( 1q P) / NPQ in the leaves. Then closure and deactivation of PSⅡ reaction centers accelerated rapidly,which might be a way to alleviate the pressure on PSⅡ reaction centers,but at the same time decreased the capacity of solar energy utilization in particular to high light intensity utilization in the leaves of Mulberry seedlings.
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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 | 0.000 | 0.000 |
| Meta-epidemiology (narrow) | 0.001 | 0.000 |
| Meta-epidemiology (broad) | 0.001 | 0.000 |
| Bibliometrics | 0.000 | 0.001 |
| Science and technology studies | 0.000 | 0.000 |
| Scholarly communication | 0.000 | 0.000 |
| Open science | 0.001 | 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".