Seasonal root growth of Scots pine seedlings in relation to shoot phenology, carbohydrate status, and nutrient supply
Bibliographic record
Abstract
To ascertain whether the growth rhythm of roots differs from that of the shoot, the seasonal pattern of dry mass allocation was determined in 1-year-old Scots pine (Pinus sylvestris L.) seedlings. Gas exchange, chlorophyll fluorescence, and the dynamics of starch and soluble sugars were examined to understand the role of stored carbon and that of current photosynthates in meeting the sink demand of plant organs. In this growth-chamber experiment, hydroponic cultures supplied the seedlings with low (0.25 mM N) or high (2.5 mM N) nutrient level. The climatic conditions in the chamber simulated the weather conditions from May to mid-October in southern Finland. Root growth was most intense at the end of the growing season, at which time shoot growth slowed down. Nutrient level did not affect the growth rhythm of the roots, but the total production of root biomass was favoured by high level of nutrients. The response of root growth to root zone temperature (RZT) was not the same over the growing season, indicating that the sensitivity of root growth to RZT depends on the growth phase of the seedling. The growth rhythm of the roots is probably regulated by several internal and external factors and their interactions, including RZT and availability of photosynthates.
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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) | 0.001 | 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".