What question did this study set out to answer?

To measure the uptake and longitudinal translocation of phosphate and strontium across distinct segments and axes within intact root systems of young cereal plants.

January 1, 1967Journal of Experimental Botany

Nutrient Uptake by Different Parts of the Intact Roots of Plants

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Authors

RRR. Scott RussellEngineering Systems (United States)JSJohn P. SandersonUniversity of California, Riverside

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Implication

Experimental study reveals segment-specific nutrient uptake and translocation in intact barley roots, indicating distinct functional roles for different root types.

Key Points

To measure the uptake and longitudinal translocation of phosphate and strontium across distinct segments and axes within intact root systems of young cereal plants.
Grew young barley plants (3–4 weeks old) in water culture and applied a specialized apparatus to isolate 3–5 mm segments of intact root systems.
Supplied intact segments with 0.1 ppm phosphate or strontium to assess longitudinal movement within the cortex, release to solution, and translocation to shoots across seminal axes, nodal axes, and lateral roots.
Ions absorbed by 3–5 mm segments moved longitudinally through the cortex over short distances under metabolic control, with ions subsequently released back into the external solution a few millimeters from entry.
Total uptake per unit root length varied predominantly with volume across seminal axes, nodal axes, and laterals, though laterals exhibited a relatively greater absorption ratio of phosphate compared to strontium.
Translocation was minimal from the apical 3 mm of roots, while older segments of nodal axes translocated a considerably greater fraction of absorbed ions to shoots than seminal axes or laterals.

Cite This Study

Russell et al. (1967) studied this question.

synapsesocial.com/papers/6a9d6304f38c20636a48aca0 https://doi.org/10.1093/jxb/18.3.491

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Implication

Experimental study reveals segment-specific nutrient uptake and translocation in intact barley roots, indicating distinct functional roles for different root types.

Nutrient Uptake by Different Parts of the Intact Roots of Plants

Discussion

Member takes

Implication

Key Points

Cite This Study

Nutrient Uptake by Different Parts of the Intact Roots of Plants

Discussion

Member takes

Implication

Key Points

Cite This Study

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