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Effect of spikelet position on starch proportion, granule distribution and related enzymes activity in wheat grain

Author

Listed:
  • W. Li

    (Collegeof Plant Science, Anhui Science and Technology University, Fengyang, P.R. China)

  • S. Yan

    (Collegeof Plant Science, Anhui Science and Technology University, Fengyang, P.R. China)

  • Z. Wang

    (National Key Laboratory of Crop Biology, Agronomy College, Shandong Agricultural University, Tai'an, P.R. China)

Abstract

The starch proportion, starch granule distribution, and activities of enzymes involved in starch synthesis in different spikelet positions were examined during grain development in two high-yielding winter wheat cultivars. The results showed that grain number and weight per spikelet in different spatial position showed a single-peak curve from the base to the top in a wheat spike. Upper spikelets had the highest starch and amylose proportion followed by basal spikelets, whereas middle spikelets had the lowest. Starch and amylose absolute content was in opposition to their proportion. The volume of B- and A-type granule in grain of middle spikelets was remarkably higher and lower than those of basal and upper spikelets, respectively. However, no significant difference occurred in the number of A- and B-type granule in grains among different spikelet position. Compared with the basal and upper spikelets, the middle spikelets showed higher sucrose and ATP content and activities of starch biosynthetic enzymes, and subsequently higher starch absolute content. The results suggested that superior sucrose providing and degradation capacity and the high activities of enzymes involved in starch synthesis resulted in development of B-type starch granule in grain of middle spikelets.

Suggested Citation

  • W. Li & S. Yan & Z. Wang, 2013. "Effect of spikelet position on starch proportion, granule distribution and related enzymes activity in wheat grain," Plant, Soil and Environment, Czech Academy of Agricultural Sciences, vol. 59(12), pages 568-574.
    • Handle: RePEc:caa:jnlpse:v:59:y:2013:i:12:id:586-2013-pse
    DOI: 10.17221/586/2013-PSE
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    References listed on IDEAS

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    1. I. Capouchová & J. Petr & D. Marešová, 2003. "Evaluation of size distribution of starch granules in selected wheat varieties by the Low Angle Laser Light Scattering method," Plant, Soil and Environment, Czech Academy of Agricultural Sciences, vol. 49(1), pages 12-17.
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    Cited by:

    1. Xiang Chen & lvzhou Liu & Hongmei Cai & Baoqiang Zheng & Jincai Li, 2024. "Effects of spring low-temperature stress on winter wheat seed-setting characteristics of spike," Plant, Soil and Environment, Czech Academy of Agricultural Sciences, vol. 70(2), pages 84-92.

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