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This article in CS

  1. Vol. 11 No. 2, p. 297-302
    Received: Oct 14, 1970

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Genetic Control of Starch Granule Morphology and Physical Structure in Developing Maize Endosperms1

  1. Richard P. Brown,
  2. Roy G. Creech and
  3. Leon J. Johnson2



Maize (Zea mays L.) starch granules in endosperms of 24 genotypes were studied during kernel development at 12, 18, and 24 days post pollination. Maximum and minimum granule dimensions, granule shapes expressed as the ratio of maximum to minimum granule dimensions, and differences in physical structure as measured by birefringence end-point temperature (BEPT), X-ray diffraction analyses, and infrared absorption spectra were determined. Mutant starch granule formation at 12 days after pollination was not different from normal for granule dimensions, granule shapes, and BEPT. Differences from normal were apparent for 18- and 24-day granules for all factors studied except infrared absorption.

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