Genotypic variation in cold tolerance influences the yield of Miscanthus

A. D. Farrell, John C. Clifton-Brown, I. Lewandowski, M. B. Jones

Research output: Contribution to journalArticlepeer-review

117 Citations (SciVal)

Abstract

When grown in Europe, Miscanthus genotypes often produce yields lower than their potential due to late emergence of shoots in the spring or to damage from late frosts when shoots emerge too early. Here, we investigate genotypic variation in the base temperature (Tb) for shoot emergence and in the lethal temperature for shoots (LT50) in four Miscanthus genotypes. In all genotypes, lowering temperature increased the time to shoot emergence, with Tb ranging from 8.6°C in Sac-5 to 6°C in Sin-H9. Frost treatments below −8°C resulted in a marked reduction in growth in all four genotypes. Sin-H9 was the most frost tolerant with an LT50 of −9.3°C. There was little variation found in leaf osmotic potential, but leaf moisture content was significantly lower in Sin-H9 than in the other genotypes. The lower thermal requirement for emergence and lower LT50 seen in Sin-H9 was incorporated into a model of Miscanthus production. The model showed an extended growing season that was predicted to increase yields by up to 25%.
Original languageEnglish
Pages (from-to)337-345
Number of pages9
JournalAnnals of Applied Biology
Volume149
Issue number3
Early online date29 Nov 2006
DOIs
Publication statusPublished - Dec 2006

Keywords

  • frost
  • leaf extension
  • miscanthus
  • moisture content
  • osmotic potential
  • shoot emergence
  • temperature

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