Extracuticular Wax and Contact Angle Measurements on Wheat (Triticum Vulgare L.)

Troughton, J. H.; Hall, D. M.

doi:10.1071/bi9670509

Cited by 49 publications

(20 citation statements)

References 13 publications

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“…This wettability of a leaf surface is affected by its degree of roughness (Challen, 1960(Challen, , 1962Troughton & Hall, 1967). Prominent leaf ridging and trichomes can reduce wettability considerably, even though cuticular absorption may also occur in the latter.…”

Section: Discussionmentioning

confidence: 99%

LEAF‐SURFACE PROPERTIES IN RELATION TO TOLERANCE OF SALT SPRAY IN FESTUCA RUBRAssp. LITORALIS (G. F. W. MEYER) AUQUIER

1986

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SUMMARYLeaf-surface properties were investigated in F. rubra ssp. litoratis (G. F. W. Meyer) Auquier cv. Hawk, which is tolerant of salt spray, and cv. Aberystwyth S.59, which is susceptible. Salt retention and leaf wettabilities were measured and leaf-surface structure was observed using a scanning electron microscope. In both cultivars stomata were confined to adaxial leaf surfaces which were less wettable than abaxial surfaces probably because of ridging and wax deposits. Salt retention after spraying was much higher per unit dry weight in S.59 than in Hawk, although salt retention per unit of projected leaf area was similar in both cultivars. This was because leaves were folded about the midrib in Hawk but were much flatter in S.59. Folding reduced the exposure of adaxial leaf surfaces to salt spray. The adaptative significance of this is discussed together with its broader physiological implications.

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Section: Discussionmentioning

confidence: 99%

LEAF‐SURFACE PROPERTIES IN RELATION TO TOLERANCE OF SALT SPRAY IN FESTUCA RUBRAssp. LITORALIS (G. F. W. MEYER) AUQUIER

1986

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“…However, non-glaucousness increased aphid resistance in wheat (Lowe et al 1985). The quantity of epicuticular waxes influences wettability by pesticide sprays (Troughton and Hall 1967) and susceptibility to leaf disease (Jensen and Driscoll 1962) in wheat. The non-glaucous appearance is biochemically attributed to inhibition of the synthesis of b-diketones (Bianchi and Figini 1986).…”

Section: Introductionmentioning

confidence: 99%

Genetic mapping of the genes for non-glaucous phenotypes in tetraploid wheat

2010

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Abstracts Glaucousness is a visual trait related to the colour of the photosynthetic surface and hence it can be easily selected. It is associated both with the deposition and orientation of wax platelets on the cuticle of the photosynthetic surface. It is known that the glaucous leaf character is determined by the W1 gene, and Iw1 and Iw1 DIC genes from Triticum dicoccoides, which act as an epistatic inhibitor to a glaucousness. The aim of the present study was to map W1, Iw1 and Iw1 DIC from T. dicoccoides in the short arm of chromosome 2B of tetraploid wheat. Segregation of F 2 populations of three hybrids indicated that the marker Xgwm455 is linked with and distal to Iw1 (16.7 cM), two markers are tightly linked with W1, and Iw1 DIC is linked with Xgwm614 and Xwmc661 distally located on chromosome 2BS. From three derived maps, it is suggested that Iw1 DIC locus is different from W1. We discuss the difference between Vir and Iw1 DIC from T. dicoccoides.

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“…However, nonglaucousness increased aphid resistance in wheat (Lowe et al, 1985). The quantity of epicuticular waxes influences wettability by pesticide sprays (Troughton & Hall, 1967) and susceptibility to leaf disease (Jensen & Driscoll, 1962) in wheat. The non-glaucous appearance is biochemically attributed to inhibition of the synthesis of b-diketones (Bianchi & Figini, 1986).…”

Section: Introductionmentioning

confidence: 99%

Genetic mapping of the genes for glaucous leaf and tough rachis in Aegilops tauschii, the D-genome progenitor of wheat

et al. 2005

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Glaucous leaf and tough rachis phenotypes are rare in Aegilops tauschii, the D genome donor to common wheat (Triticum aestivum). The genes for glaucous leaf and tough rachis were mapped using microsatellite probes in A. tauschii. The glaucous phenotype was suppressed by the inhibitor W2 I located on chromosome 2DS. The gene W2 I was mapped to the distal part of 2DS, and was unlinked to the centromere. This suggests that the distance of the W2 I locus from the centromere was maintained during the evolution of hexaploid wheat from its diploid progenitors as the inhibitor gene is at the same position in A. tauschii and bread wheat. The Br t (Brittle rachis of A. tauschii) locus was located on the short arm of chromosome 3D, and was 19.7 cM from the centromeric marker, Xgdm72.3D. Br t causes breakage of the spike at the nodes, thus creating barrel-shaped spikelets, while Br 1 in hexaploid wheat causes breakage above the junction of the rachilla with the rachis such that a fragment of rachis is attached below each spikelet.

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Extracuticular Wax and Contact Angle Measurements on Wheat (Triticum Vulgare L.)

Cited by 49 publications

References 13 publications

LEAF‐SURFACE PROPERTIES IN RELATION TO TOLERANCE OF SALT SPRAY IN FESTUCA RUBRAssp. LITORALIS (G. F. W. MEYER) AUQUIER

LEAF‐SURFACE PROPERTIES IN RELATION TO TOLERANCE OF SALT SPRAY IN FESTUCA RUBRAssp. LITORALIS (G. F. W. MEYER) AUQUIER

Genetic mapping of the genes for non-glaucous phenotypes in tetraploid wheat

Genetic mapping of the genes for glaucous leaf and tough rachis in Aegilops tauschii, the D-genome progenitor of wheat

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