Root Morphology and Physiology in Relation to the Yield Formation of Rice

Jian chang Yang*, Hao Zhang, Jianhua ZHANG

*Corresponding author for this work

Research output: Contribution to journalReview articlepeer-review

71 Citations (Scopus)

Abstract

Root system is a vital part of plant and regulates many aspects of shoot growth and development. This paper reviews how some traits of root morphology and physiology are related to the formation of grain yield in rice (. Oryza sativa L.). Higher root biomass, root oxidation activity, and cytokinin contents in roots are required for achieving more panicle number, more spikelets per panicle, greater grain-filling percentage, and higher grain yield. However, these root traits are not linearly correlated with yield components. When these traits reach very high levels, grain filling and grain yield are not necessarily enhanced. High numbers of mitochondria, Golgi bodies, and amyloplasts in root tip cells benefit root and shoot growth and yield formation. Proper crop management, such as an alternate wetting and moderate soil drying irrigation, can significantly improve ultra-structure of root tip cells, increase root length density and concentration of cytokinins in root bleedings, and consequently, increase grain-filling percentage, grain yield, and water use efficiency. Further studies are needed to investigate the mechanism underlying root-shoot and root-soil interactions for high grain yield, the roles of root-sourced hormones in regulating crop growth and development and the effects of soil moisture and nutrient management on the root architecture and physiology.

Original languageEnglish
Pages (from-to)920-926
Number of pages7
JournalJournal of Integrative Agriculture
Volume11
Issue number6
DOIs
Publication statusPublished - Jun 2012

Scopus Subject Areas

  • Food Science
  • Biochemistry
  • Ecology
  • Food Animals
  • Animal Science and Zoology
  • Agronomy and Crop Science
  • Plant Science

User-Defined Keywords

  • Alternate wetting and moderate drying
  • Grain filling
  • Grain yield
  • Rice (Oryza sativa)
  • Root morphology and physiology

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