The Role of Boron in Plant Growth: IV. INTERRELATIONSHIPS BETWEEN BORON AND INDOL-3YL-ACETIC ACID IN THE METABOLISM OF BEAN RADICLES

Coke, L.; Whittington, W. J.

doi:10.1093/jxb/19.2.295

Cited by 62 publications

(29 citation statements)

References 25 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…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. Their boron deficient root tips showed a reduced absorption of [^'^CJIAA and they discussed several similarities between boron deficiency and IAA toxicity.…”

Section: Discussionmentioning

confidence: 94%

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

Robertson

Loughman

1974

New Phytologist

View full text Add to dashboard Cite

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.

show abstract

Section: Discussionmentioning

confidence: 94%

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

Robertson

Loughman

1974

New Phytologist

View full text Add to dashboard Cite

show abstract

“…The literature also abounds with rather disjointed information on the remaining interactions of Figure 5, namely those between boron, peroxidases and auxin (again, see Neales, 1960). Hyperauxiny is a frequently reported symptom of boron deficiency (Jaweed and Scott, 1967;Coke and Whittington, 1968). This can be attributed to several factors.…”

Section: Boron In Relation To Hormone Metabolism and Peroxidasesmentioning

confidence: 99%

“…Cell death may result from this with a concomitant synthesis of auxin (see Sheldrake's views in paragraph above). Although this hyperauxiny may induce IAA-oxidase, the activity of this enzyme complex is itself inhibited by o-diphenols (see Coke and Whittington, 1968;Hewitt and Smith, 1975;Bohnsack and Albert 1977).…”

Section: Boron In Relation To Hormone Metabolism and Peroxidasesmentioning

confidence: 99%

Boron, Lignification and the Origin of Vascular Plants‐a Unified Hypothesis

Lewis

1980

New Phytologist

174

View full text Add to dashboard Cite

SUMMARYIt is proposed that the development of an essential role for boron was a prerequisite for the evolution of vascular from prevascular plants since there is a prima facie case that a primary role of boron concerns the biosynthesis of lignin and, in conjunction with auxin, differentiation of xylem. In particular, a potential role for borate in regulating the hydroxylase and oxidase activities of the phenolases involved in the biosynthesis of caffeic and hydroxyferulic acids is suggested. The origin of this role for boron depended on the selection of sucrose in the Chlorophyta as a mobile and storage carbohydrate since, compared with the acyclic sugar alcohols accumulated in other algal groups, sucrose forms only a very weak complex with borate. It is argued that only when borate was not sequestered by complexing with other carbohydrates did the way become clear for it to acquire an essential role. This acquisition catalysed the evolutionary dichotomy between non-lignified and lignified photosynthetic landplants, the bryophytes and tracheophytes. Boron subsequently became involved in two other requirements for success on land -the exploitation of soil for anchorage, water and minerals, and the emancipation of fertilization from external water-since this element is required for development of adventitious roots (again in conjunction with plant hormones) and, in angiospertns, for germination of pollen.

show abstract

“…Jaweed and Scott (10) found greater amounts of IAA in borondeficient sunflower plants. Coke and Whittington (6) reported that both low boron and high IAA concentrations resulted in reduced elongation of bean roots and that roots grown in excess IAA recovered more rapidly in media containing high concentrations of boron. Extracts of boron-deficient root apices appeared to contain higher than normal concentrations of IAA-like substances.…”

Section: Discussionmentioning

confidence: 99%

Boron Deficiency in Unfertilized Cotton (Gossypium hirsutum) Ovules Grown in Vitro

Birnbaum

Beasley²,

Dugger³

1974

Plant Physiol.

View full text Add to dashboard Cite

Boron deficiency and phytohormone interactions have been studied in unfertilized cotton (Gossypium hirsutum) ovules grown in vitro. Such ovules required exogenous indoleacetic acid and/or gibberellic acid for fiber elongation. Boron also was required for maintenance of fiber elongation and normal morphogenesis throughout 14 days of culture. The amount of exogenous boron necessary for maximum fiber elongation varied among experiments, presumably in relation to endogenous boron levels at anthesis. Some ovular epidermal cells distant from the liquid medium could be induced to elongate into fiber even after 6 days in boron-deficient medium in response to the later addition of boron.Boron deficiency, in the presence of exogenous indoleacetic acid, was characterized by lack of fiber development on the inundated ovular surface and reduced fiber growth on the ovular surface exposed to air. In the presence of gibberellic acid, boron deficiency was characterized by complete absence of fiber and callusing of the entire ovular surface. When both indoleacetic acid and gibberellic acid were added, the lack of boron resulted in proliferation of callus laterally and upward from the inundated epidermis, accumulation of brown pigments (presumably phenolic compounds) in the callus, and restriction of fiber to a small area of the upper ovular surface.If fertilization is permitted (flowers left intact until the second day postanthesis) and ovules are aseptically transferred to culture, fibers continue to elongate in response to a completely defined, liquid, basal medium. This continued elongation of cotton fibers is markedly stimulated by exogenous gibberellic acid (GA3) but only slightly, if at all, by indoleacetic acid. It was concluded that IAA is the phytohormone of principal consequence synthesized in response to the processes of fertilization (2). If fertilization is prevented and ovules are transferred to culture, fibers fail to elongate in the presence of the same basal medium. However, fiber elongation does proceed when IAA and/or GA3 are included in the basal medium. IAA alone provides for moderate fiber elongation of unfertilized ovules, GA3 provides for less fiber elongation but more callus formation from the ovular surface, and when IAA and GA3 are furnished in combination, the fiber elongation response is approximately additive (2, 3). Thus, a situation could be created where cells are completely dependent upon exogenous phytohormones for elongation and boron deficiency could be imposed at any point in the phytohormone-dependent elongation phase. This report deals with various effects of boron deficiency and phytohormone combinations on the growth and development of unfertilized cotton ovules in vitro. MATERIAILS AND METHODSBoron is required for normal growth and development of all higher plants, although to date no single specific physiological role has been assigned to it. During the past 2.5 decades boron nutrition has been implicated in several general areas of plant metabolism: organic translocation, enzy...

show abstract

The Role of Boron in Plant Growth: IV. INTERRELATIONSHIPS BETWEEN BORON AND INDOL-3YL-ACETIC ACID IN THE METABOLISM OF BEAN RADICLES

Cited by 62 publications

References 25 publications

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

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

Boron, Lignification and the Origin of Vascular Plants‐a Unified Hypothesis

Boron Deficiency in Unfertilized Cotton (Gossypium hirsutum) Ovules Grown in Vitro

Contact Info

Product

Resources

About