The Essential Nutrient Elements: Requirements and Interactions in Plants

Hewitt, E. J.

doi:10.1016/b978-0-12-395600-2.50013-9

Cited by 111 publications

(106 citation statements)

References 454 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…The possible metabolic interrelationship between borate and phenols, previously extensively discussed in particular by Hewitt (1963) and Shkol'nik (1974), is the subject of the next section.…”

Section: Interaction Between Borate and Compounds Containing C/s-hydrmentioning

confidence: 90%

“…Freedom from requirement for external water for sexual reproduction 1958; Skok, 1958;Nason and McElroy, 1963;Hewitt, 1963;Dugger, 1973;Hewitt and Smith, 1975). Among the algae, confirmed reports of essentiality are confined to that of Cylindrotheca fusiformis and a few other diatoms (Lewin, 1965(Lewin, , 1966a.…”

Section: Maximizing Photosynthesis: Transpiration Ratiomentioning

confidence: 99%

“…From the surveys in the following books, reviews and research papers (Skok, 1958;Hewitt, 1963;Nason and McElroy, 1963;Street and Opik, 1970;Dugger, 1973;Shkol'nik, 1965Shkol'nik, , 1974Robertson and Loughman, 1974;Hewitt and Smith, 1975;Pollard, Parr and Loughman, 1977;Tanada, 1978) the following putative major roles may be listed: (a) at the whole plant (including pollen) level -control of growth and differentiation; (b) at the physiological level -control of membrane permeability and of translocation of sugar and (c) at the biochemical level -control of enzymes involved in metabolism of carbohydrates, of polyphenols and lignin, of auxin and of nucleic acids.…”

Section: The Metabolic Role(s) Of Boronmentioning

confidence: 99%

“…For vascular plants, the symptoms resulting from deficiency of boron have been extensively documented (see Stiles, 1958;Hewitt, 1963;Hewitt and Smith, 1975). Apposite to the present thesis is that significant among these is poor overall lignification and differentiation of xylem.…”

Section: The Symptoms Of Boron Deficiency and Their Relevance To The mentioning

confidence: 99%

“…4. Mechanism of action of spinach-beet phenolase (after Mclntyre and Vaughan, 1975) requirement than dicotyledons (Neales, 1960;Hewitt, 1963), have a lower proportion of sinapyi units. The inference is that, in dicotyledonous angiosperms, there is a causal connection between the extra boron requirement and the extra sequence of hydroxylation and methylation leading to the synthesis of sinapyi units.…”

Section: The Symptoms Of Boron Deficiency and Their Relevance To The mentioning

confidence: 99%

See 4 more Smart Citations

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

Lewis

1980

New Phytologist

176

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

Section: Interaction Between Borate and Compounds Containing C/s-hydrmentioning

confidence: 90%