Relation between stem growth processes and internode length patterns in sorghum cultivar 'Kazetachi'

Akihiro Fujii, Satoshi Nakamura, Yusuke Goto

Research output: Contribution to journalArticlepeer-review

6 Citations (Scopus)

Abstract

Sorghum cultivar 'Kazetachi' has a unique internode length pattern, with a wavy shape that changes depending on the cultivation environment. It is regarded as a suitable material for analyzing the environmental factors affecting internode elongation. This study was conducted to clarify the relation between the final internode length at harvest and the increment of stem growth to establish a method to elucidate stem growth during the growing season. To confirm the internode elongation pattern, we sampled plants when each leaf had just expanded. The leaf number, plant length, and collar height of plants in the field were measured during the growing season. The internode elongation pattern of 'Kazetachi' resembled that reported in sweet sorghum, indicating that the elongation period of each internode can be estimated by recording the leaf number during the growing period. By measuring the plant length and the collar height as an index of stem growth, we can easily estimate the rapid elongation period of internode, which can be a peak or a trough in the internode length pattern during the growing period. The collar height during the growing period can be estimated by measuring the leaf number in the growth stage and recording the length of internodes and leaf sheaths at harvest. Even the plant length can be estimated by adding the leaf blade length to these traits. However, the collar height seemed to be a better index of stem growth than the plant length.

Original languageEnglish
Pages (from-to)185-193
Number of pages9
JournalPlant Production Science
Volume17
Issue number2
DOIs
Publication statusPublished - 2014

Keywords

  • 'Kazetachi'
  • Collar height
  • Internode length
  • Internode length pattern
  • Sorghum bicolor
  • Stem growth

ASJC Scopus subject areas

  • Agronomy and Crop Science

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