A Further Investigation of the Replacement of Boron by Indoleacetic Acid

MacVicar, Robert; Tottingham, W. E.

doi:10.1104/pp.22.4.598

Cited by 12 publications

(6 citation statements)

References 2 publications

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“…He reported a partial replacement of boron by auxin in growth at low light intensities. Subsequent workers (13,15) failing to duplicate Eaton's experimental conditions, did not reproduce his results. As a consequence, Eaton's idea has largely been ignored.…”

Section: Discussionmentioning

confidence: 76%

A relationship between boron & auxin in C¹⁴ translocation in bean plants

Dyar

Webb

1961

Plant Physiol.

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The essentiality of boron for higher plants is well established although no definitive role proposed for this element has remained undisputed. So many processes are affected indirectly by boron that the primary effect(s) have remained obscure (9). Gauch and Dugger (9) suggest that a relatively specific role in carbohydrate translocation is indicated. Sucrose translocation is considerably reduced in boron deficient plants before morphological symptoms are evident. Gauch and Dugger (8) maintain that subsequent symptoms are simply the expression of carbohydrate deficiency resulting from the impaired translocation system. They suggest that a negatively charged sugar-boron complex might more easily traverse cell membranes than non-borated sugar molecules or that boron might be a constituent of the membrane site across which the sugar moves. Skok (20,21,22) points out that it is also possible for the relationship of boron to translocation to be indirect. He proposes that the boron effect on translocation is the result of the elements' essentiality to the metabolic activity of meristematic regions which have large substrate requirements. The effect of this particular metabolic activity including that associated with cell enlargement can be called sink effect; its relationship to translocation is now well established (3,12,23). If Skok is correct, cessation of growth would be the cause rather than the result of impaired carbohydrate translocation in boron deficient plants. Dugger et al. (4) proposed that boron affects the rate of translocation through its effect on the sugarstarch balance of the leaves. Scott (18) presents a similar hypothesis: "It appears that boron performs a protective function in plants in that it prevents excessive polymerisation of sugars at sites of sugar synthesis". It would appear, however, that boron

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Section: Discussionmentioning

confidence: 76%

A relationship between boron & auxin in C¹⁴ translocation in bean plants

Dyar

Webb

1961

Plant Physiol.

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“…A relationship between boron and plant hormones was suggested by Eaton (1940) who postulated that boron may be required for auxin synthesis. This hypothesis was not supported (Moinat, 1943;MacVicar and Totingham, 1947) and the latter authors noted an acceleration of boron-deficiency symptoms in plants treated with IAA. Coke and Whittington (1968) demonstrated increased activity of an auxin type compound in the root tips of field beans after 42 h in boron-deficient media.…”

Section: Discussionmentioning

confidence: 87%

Response to Boron Deficiency: A Comparison With Responses Produced by Chemical Methods of Retarding Root Elongation

Robertson

Loughman

1974

New Phytologist

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SUMMARYSeedlings of Vicia faba L. were subjected to treatments with IAA, 2,4-D, tri-iodobenzoic acid, kinetin, 2-chloroethanephosphonic acid as well as those designed to prevent normal division in the primary meristem. Where division was inhibited with colchicine, trifluralin, dinitramine or surgical excision, a radial expansion of the root tip occurred. However, the anatomical aspects of the responses and their effects on phosphate absorption and incorporation were quite distinct from the effects produced in both boron deficiency and excess auxin treatments. Kinetin gave similar effects to mitotic inhibitors. The possibility that boron deficiency is associated with an excess level of endogenous auxin was examined. The effects of boron deficiency were compared with those associated with the presence of excess auxin.

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“…Boron interaction with auxin has long been postulated, and although the issue remains controversial, it may be central to our understanding of the role of boron in plants. In the past, boron deprivation has been reported to cause IAA accumulation and toxicity (20,55,76,85,89) as well as IAA depletion and deficiency (23,24,120). The mechanisms of the responses have not been explained.…”

Section: Sites Of Boron Action In Plant Metabolismmentioning

confidence: 99%

Boron in Plant Structure and Function

Blevins

Lukaszewski

1998

Annu. Rev. Plant. Physiol. Plant. Mol. Biol.

641

364

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New and exciting developments in boron research in the past few years greatly contributed to better understanding of the role of boron in plants. Purification and identification of the first boron-polyol transport molecules resolved much of the controversy about boron phloem mobility. Isolation and characterization of the boron-polysaccharide complex from cell walls provided the first direct evidence for boron crosslinking of pectin polymers. Inhibition and recovery of proton release upon boron withdrawal and restitution in plant culture medium demonstrated boron involvement in membrane processes. Rapid boron-induced changes in membrane function could be attributed to boron-complexing membrane constituents. Boron may affect metabolic pathways by binding apoplastic proteins to cis-hydroxyl groups of cell walls and membranes, and by interfering with manganese-dependent enzymatic reactions. In addition, boron has been implicated in counteracting toxic effects of aluminum on root growth of dicotyledonous plants. Molecular investigations of boron nutrition have been initiated by the discovery of a novel mutant of Arabidopsis thaliana with an altered requirement for boron.

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A Further Investigation of the Replacement of Boron by Indoleacetic Acid

Cited by 12 publications

References 2 publications

A relationship between boron & auxin in C¹⁴ translocation in bean plants

A relationship between boron & auxin in C¹⁴ translocation in bean plants

Response to Boron Deficiency: A Comparison With Responses Produced by Chemical Methods of Retarding Root Elongation

Boron in Plant Structure and Function

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A Further Investigation of the Replacement of Boron by Indoleacetic Acid

Cited by 12 publications

References 2 publications

A relationship between boron & auxin in C14 translocation in bean plants

A relationship between boron & auxin in C14 translocation in bean plants

Response to Boron Deficiency: A Comparison With Responses Produced by Chemical Methods of Retarding Root Elongation

Boron in Plant Structure and Function

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A relationship between boron & auxin in C¹⁴ translocation in bean plants

A relationship between boron & auxin in C¹⁴ translocation in bean plants