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Record W2051467924 · doi:10.1071/fp10108

Path of water for root growth

2010· article· en· W2051467924 on OpenAlex

Why this work is in the frame

A frame that forgets how it found something cannot be audited. These are the routes that admitted this work.

fundA Canadian funder is recorded on the work.
no affNo Canadian affiliation: this work is invisible to an affiliation-only frame.
No Canadian affiliation. An affiliation-only frame, the usual design, would never have seen this work. It is one of the works that make the case for inverting the frame.

Bibliographic record

VenueFunctional Plant Biology · 2010
Typearticle
Languageen
FieldAgricultural and Biological Sciences
TopicPlant nutrient uptake and metabolism
Canadian institutionsnot available
FundersCommonwealth Scientific and Industrial Research OrganisationMcMaster University
KeywordsPhloemEcophysiologyBiologyRoot systemAgronomyWater transportSoil waterFibrous root systemBotanyDNS root zonePlant biologyHorticultureSoil scienceEnvironmental scienceEcologyWater flow

Abstract

fetched live from OpenAlex

Do roots obtain water for their growth directly from soil surrounding the growth zone or indirectly, via phloem, from water absorbed elsewhere? Wheat (Triticum aestivum L.) was studied with time-lapse imaging of seminal axile roots, growing in soil and air in a custom-made laboratory rhizotron, before and after excision. The growth data were combined with a theoretical estimate of the amount of water that could be supplied from the phloem. Roots readily extended into air, providing strong evidence that they obtain a portion of their growth-sustaining water internally. The time-lapse experiments indicated that in moist soil, internal sources provided 26–45% of the water for root growth, but the rest came externally from the soil surrounding the growth zone. From the theoretical analysis, the phloem could supply, on average, 64% of the total, accounting for all the internal sources. This indicates that phloem water could be used when root tips cannot access external water, such as in cracks or pores, or regions of dry soil. The distribution of phloem-delivered water for root growth should be considered in whole-plant modelling of root systems. Maximising phloem flux at root tips might confer more efficient use of soil water by crops.

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.

Full frame distilled prediction

Teacher imitation

Not 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.

metaresearch head score (Codex)0.000
metaresearch head score (Gemma)0.000
Version: codex-gemma-dda1882f352aValidation status: machine_predicted_unvalidated
Candidate categoriesnone
Consensus categoriesnone
DomainCandidate signal: none · Consensus signal: none
Study designCandidate signal: Bench or experimental · Consensus signal: none
GenreCandidate signal: Empirical · Consensus signal: Empirical
Teacher disagreement score0.854
Threshold uncertainty score0.505

Codex and Gemma teacher scores by category

CategoryCodexGemma
Metaresearch0.0000.000
Meta-epidemiology (narrow)0.0000.000
Meta-epidemiology (broad)0.0000.000
Bibliometrics0.0000.000
Science and technology studies0.0000.000
Scholarly communication0.0000.000
Open science0.0000.000
Research integrity0.0000.000
Insufficient payload (model declined to judge)0.0000.000

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.

Opus teacher head0.020
GPT teacher head0.194
Teacher spread0.174 · how far apart the two teachers sit on this one work
Validation statusscore_only:v0-immature-baseline · verbatim from the scoring run: score_only means the number may rank works, and no category label ships from it