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Differences of Starch Granule Distribution in Grains from Different Spikelet Positions in Winter Wheat

Author

Listed:
  • Anling Yu
  • Yong Li
  • Yingli Ni
  • Weibing Yang
  • Dongqing Yang
  • Zhengyong Cui
  • Zhenlin Wang
  • Yanping Yin

Abstract

Wheat starch development is a complex process and is markedly difference by changes in spikelet spatial position. The present study deals with endosperm starch granule distribution and spatial position during filling development. The study was conducted with pure starch isolated from wheat (Triticum aestivum L.), Jimai20 and Shannong1391, at 7–35 days after anthesis (DAA). The results showed that grain number, spikelet weight and grain weight per spikelet in different spatial position showed parabolic changes. Upper spikelets had highest starch and amylose content followed by basal spikelets, then middle spikelets. The paper also suggested the volume percents of B-type and A-type granule in grain of middle spikelets were remarkably higher and lower than those of basal and upper spikelets, respectively. However, no significant difference occurred in the number percents of the two type granule. The ratio of amylase to amylopectin was positively correlated with the volume proportion of 22.8–42.8 µm, but was negatively related to the volume proportion of

Suggested Citation

  • Anling Yu & Yong Li & Yingli Ni & Weibing Yang & Dongqing Yang & Zhengyong Cui & Zhenlin Wang & Yanping Yin, 2014. "Differences of Starch Granule Distribution in Grains from Different Spikelet Positions in Winter Wheat," PLOS ONE, Public Library of Science, vol. 9(12), pages 1-16, December.
    • Handle: RePEc:plo:pone00:0114342
    DOI: 10.1371/journal.pone.0114342
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