Comparative Analysis of Photosynthetic Characteristics of Three Introduced Poplars and Three Native Poplars
Bibliographic record
Abstract
The gas exchange,chlorophyll fluorescence parameter of three introduced poplars and three native poplars were determined under natural conditions.Three study introduced poplars were Finland poplar A21(Populus tremula×Populus tremuloides),Finland poplar 16(Populus tremula×Populus tremuloides)and Jiayang(Populus deloides Marsh×Populus nigra L.),and three study native poplars were Xiaoqingyang(Populus pseudo-simonii),Xiaoyeyang(Populus simonii Carr.) and Xing'anyang(Populus hsinganica).The determination results showed that the net photosynthetic rates(Pn)of the introduced poplars were significantly higher than three native poplars,transpiration rate(Tr)and water use efficiency(WUE)of the introduced poplars were also higher than the native poplars.These results indicated that the phytosynthetic capacity of the introduced poplars were promising,and the efficiency of light and water absorption were also high.The mean values of the initial fluorescence(Fo),maximal fluorescence(Fm),actual efficiency of primary conversion of light energy of PS II(F′v/F′m),stable fluorescence(Fs),minimum fluorescence of dark adaptation(Fo)and maximum fluorescence of light adaptation(F′m)of introduced poplars were higher than those of native poplars,but the mean values of the variable fluorescence(Fv),potential efficiency of primary conversion of light energy of PS II(Fv/Fw),the ratio of variable fluorescence to initial fluorescence(Fv/Fo),non-photochemical quenching coefficient(NPQ),quantum yield of PS II electron transport and photochemical quenching coefficient(qP)were lower than that of native poplar.Correlation analysis among photosynthetic parameters showed that there were significant positive correlations between Pn and Tr,Ci and Tr,Fm and Fo,Fv/Fo and Fv/Fm,PS II and Fo(P0.01),and between PSII and Fm,F′v/F′m and Fv/Fo(P0.05).However,there were significantly negative correlations between Fv/Fo and Fo,Fv/Fm and Fo,NPQ and Fv/Fo(P0.01),and between qP and F′v/F′m(P0.05).
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How this classification was reachedexpand
Full frame machine prediction
Teacher imitationNot calibrated prevalence, not ground truth. Human validation pending. The Gemma side is a direct model label for every work in the frame, read from the title-only record. The Codex side is a classifier learned from the 10,348 direct Codex labels and calibrated to design-weighted sample rates; fields without enough sample support carry no Codex call. Candidate is the union of the two sides; consensus is their intersection. These outputs are machine_predicted_unvalidated and are not human labels.
Distilled classifier scores by category (both heads)
| Category | Codex | Gemma |
|---|---|---|
| Metaresearch | 0.000 | 0.000 |
| Meta-epidemiology (narrow) | 0.000 | 0.000 |
| Meta-epidemiology (broad) | 0.000 | 0.000 |
| Bibliometrics | 0.000 | 0.000 |
| 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 source (direct Gemma or distilled Codex), 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".