Thermal hardening: A new seed vigor enhancement tool in rice

Muhammad Farooq*, S. M.A. Basra, Nazir Ahmad, K. Hafeez

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

252 Citations (Scopus)

Abstract

In a laboratory study, indica and japonica rice (Oryza sativa L.) seeds were exposed to thermal hardening (heating followed by chilling followed by heating; chilling followed by heating followed by chilling; heating followed by chilling or chilling followed by heating). In indica rice, heating followed by chilling followed by heating resulted in decreased mean germination time, time to start germination, electrical conductivity of seed leachates, and time to 50% germination, as well as increased germination index, energy of germination, radicle and plumule length, root length, root/shoot ratio, root fresh and dry weight, radicle and plumule growth rate, and shoot fresh weight. In japonica rice, chilling followed by heating followed by chilling performed better than all other treatments, including control.

Original languageEnglish
Pages (from-to)187-193
Number of pages7
JournalJournal of Integrative Plant Biology
Volume47
Issue number2
DOIs
Publication statusPublished - Feb 2005
Externally publishedYes

Keywords

  • Germination
  • Indica rice
  • Japonica rice
  • Seedling vigor
  • Thermal hardening

ASJC Scopus subject areas

  • Biochemistry
  • Biochemistry, Genetics and Molecular Biology(all)
  • Plant Science

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