DOI: 10.1111/j.1399-3054.1985.tb08661.x. Localisation of translocated <sup>14</sup>C in roots and root exudates of field‐grown maize

Localisation of translocated 14C in roots and root exudates of field‐grown maize

10.1111/j.1399-3054.1985.tb08661.x

Crossref journal-article

Wiley

Physiologia Plantarum (311)

Abstract

The roots of a mature, field‐grown maize plant are dimorphic: the primary root and those from the oldest nodes are bare with a heavily lignified cortex arid sloughed epidermis; those from younger nodes, except for a bare elongation zone, have an intact epidermis surrounded by a persistent soil sheath. Sheathed roots consistently have more layers of cortical cells, but the ratio of volumes of cortex to stele (ca 4) and the cross‐sectional area of phloem (ca3× 10−2 mm2) are similar in each type. Assimilated carbon (from 14C applied to a small area of one leaf) was translocated to all roots and actively metabolized in cortex and stele of both types. After 1 to 2 days the proportion of 14C exuded from a given length of mature root into its soil sheath, or into the adjacent unattached soil in the case of bare roots, was the same (5%) in both root types when compared with the ethanol‐soluble 14C in the tissues of this length. Up to 75% of the ethanol‐soluble label in the roots was in a cationic fraction (amino acids and unidentified compounds), ca 1% was in an anionic fraction and the remainder was in a neutral fraction (sugars). Approximately equal amounts of soluble 14C were found in the stele, cortex and laterals.

Bibliography

McCully, M. E., & Canny, M. J. (1985). Localisation of translocated 14C in roots and root exudates of fieldâgrown maize. Physiologia Plantarum, 65(4), 380â392. Portico.

Authors 2

M. E. McCully (first)
M. J. Canny (additional)

References 23 Referenced 63

{'key': 'e_1_2_1_2_1', 'first-page': '60', 'volume-title': 'Phloem Translocation', 'author': 'Canny M. J.', 'year': '1973'} / Phloem Translocation by Canny M. J. (1973)
{'key': 'e_1_2_1_3_1', 'first-page': '8', 'volume-title': 'Ultra‐structure of the Root‐Soil Interface', 'author': 'Foster R. C.', 'year': '1983'} / Ultra‐structure of the Root‐Soil Interface by Foster R. C. (1983)
10.1007/BF02374110
10.1111/j.1399-3054.1971.tb03503.x
10.1007/BF02181875
10.1111/j.1469-8137.1970.tb04047.x
10.1111/j.1469-8137.1970.tb02479.x
10.1093/jxb/35.1.74
{'key': 'e_1_2_1_10_1', 'first-page': '168', 'volume-title': 'Solute Movement in the Soil Root System', 'author': 'Nye P. H.', 'year': '1977'} / Solute Movement in the Soil Root System by Nye P. H. (1977)
{'key': 'e_1_2_1_11_1', 'first-page': '6.26', 'volume-title': 'The Study of Plant Structure. Principles and Selected Methods', 'author': "O'Brien T. P.", 'year': '1981'} / The Study of Plant Structure. Principles and Selected Methods by O'Brien T. P. (1981)
10.1146/annurev.pp.31.060180.001525
10.1007/BF02139643
10.1016/0304-4211(82)90067-0
10.1104/pp.69.1.166
10.1016/S0044-328X(11)80003-6
10.1086/335078
10.1104/pp.71.1.7
10.3109/10520297809111446
10.1104/pp.41.5.755
10.1104/pp.42.5.712
10.1038/166444b0
10.1007/BF00393442
10.1093/jxb/35.6.767

Dates

Type	When
Created	19 years, 4 months ago (April 30, 2006, 7:33 p.m.)
Deposited	1 year, 10 months ago (Oct. 21, 2023, 5:33 p.m.)
Indexed	4 days, 13 hours ago (Aug. 31, 2025, 6:33 a.m.)
Issued	39 years, 9 months ago (Dec. 1, 1985)
Published	39 years, 9 months ago (Dec. 1, 1985)
Published Online	19 years, 4 months ago (April 28, 2006)
Published Print	39 years, 9 months ago (Dec. 1, 1985)

Funders 0

None

BibTeX

@article{McCully_1985, title={Localisation of translocated 14C in roots and root exudates of field‐grown maize}, volume={65}, ISSN={1399-3054}, url={http://dx.doi.org/10.1111/j.1399-3054.1985.tb08661.x}, DOI={10.1111/j.1399-3054.1985.tb08661.x}, number={4}, journal={Physiologia Plantarum}, publisher={Wiley}, author={McCully, M. E. and Canny, M. J.}, year={1985}, month=dec, pages={380–392} }

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