Resistance in sorghum to the shoot fly, Atherigona soccata: epicuticular wax and wetness of the central whorl leaf of young seedlings

    Nwanze, K F and Pring, R J and Sree, P S and Butler, D R and Reddy, Y V R and Soman, P (1992) Resistance in sorghum to the shoot fly, Atherigona soccata: epicuticular wax and wetness of the central whorl leaf of young seedlings. Annals of Applied Biology, 120 (3). pp. 373-382. ISSN 1744-7348

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    Abstract

    Sorghum genotypes known to be resistant or susceptible to shoot fly, Atherigona soccata Rondani were examined by scanning electron microscopy for differences in epicuticular wax structure and wetness of the central leaf whorl. Two major types of wax structures were observed: shoot fly resistant and moderately resistant genotypes were characterised by a smooth amorphous wax layer and sparse wax crystals while susceptible genotypes possessed a dense meshwork of crystalline epicuticular wax. The density of wax crystals decreased from the third leaf to the seventh leaf stage and was related to both seedling age and leaf position. Water droplets on susceptible genotypes with dense wax crystals showed spreading at the edges indicating a tendency to wet easily. In resistant genotypes with less dense wax crystals the droplets remained intact and did not spread.

    Item Type: Article
    Divisions: UNSPECIFIED
    CRP: UNSPECIFIED
    Uncontrolled Keywords: Sorghum, seedlings, shoot fly, leaf surface wctness, epicuticular wax structure. resistance
    Subjects: Mandate crops > Sorghum
    Depositing User: Mr Charan Sai Ch
    Date Deposited: 21 Oct 2011 02:56
    Last Modified: 21 Oct 2011 02:56
    URI: http://oar.icrisat.org/id/eprint/3064
    Official URL: http://dx.doi.org/10.1111/j.1744-7348.1992.tb04897...
    Projects: UNSPECIFIED
    Funders: UNSPECIFIED
    Acknowledgement: This paper was submitted as SA No. 1249 the 1nternation;il Crops Research lnstitutc for the Semi-Arid Tropics (ICRISAT) . Some studies were part of the 1'h.D. Thesis of 1'. S.Sree, submitted to Andhra Pradesh Agricultural University. W e appreciate the assistance of Mr A.K. Murthi for initial SEM studies at ICRISAT , and Mr R.F. Hughes (glasshouse manager, LARS ) .
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