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Correction: Developmental Dynamics of Intercalary Meristem and Pith Cavity in Rice Stems.

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Developmental Dynamics of Intercalary Meristem and Pith Cavity in Rice Stems.

Keisuke Nagai1, Yoko Niimi2, Misaki Ohsato2

  • 1Bioscience and Biotechnology Center, Nagoya University, Aichi, Japan. nagai.k@nuagr1.agr.nagoya-u.ac.jp.

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Summary

This study reveals how rice stems elongate by detailing the development of the intercalary meristem and pith cavity. It proposes a two-phase model for stem growth, crucial for understanding rice development and productivity.

Keywords:
Cell divisionClick-iT EdU imagingIntercalary meristemInternodePith cavityRice

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Area of Science:

  • Plant Biology
  • Developmental Biology
  • Agricultural Science

Background:

  • Internode elongation is key to rice productivity.
  • The formation of the intercalary meristem and pith cavity in rice stems is not fully understood.
  • Previous studies visualized the intercalary meristem but not its formation process.

Purpose of the Study:

  • To anatomically elucidate the spatiotemporal relationship between intercalary meristem development and pith cavity formation in rice stem development.
  • To understand the mechanisms regulating internode elongation in deepwater rice.
  • To propose a model for rice stem development.

Main Methods:

  • Histological analysis of intercalary meristem and pith cavity development in deepwater rice (C9285).
  • Classification of stem developmental stages based on pith cavity formation.
  • Staining techniques including Trypan blue, Calcein-AM, and MitoRed.
  • Visualization of dividing cells using the Click-iT EdU imaging assay.

Main Results:

  • Stem development was classified into four stages based on pith cavity formation and cell division activity.
  • Early stem development involves anticlinal divisions leading to internode formation.
  • Pith cavity formation occurs in stages, initially in the foot and then the internode, eventually merging.
  • Cell division activity shifts from the foot to the base of the internode, driving significant elongation.

Conclusions:

  • A two-phase model of stem development is proposed: primary elongation in the foot and secondary elongation in the internode.
  • This study provides the first anatomical elucidation of the relationship between intercalary meristem and pith cavity development in rice.
  • Findings offer new insights for research on rice stem development and other grass species.