Effect of high temperature and exposure duration on stem elongation of iceberg lettuce

Fahad Al-Said, Paul Hadley, Simon Pearson, Muhammad Khan, Qumer Iqbal

Research output: Contribution to journalArticle

1 Citation (Scopus)

Abstract

Lettuce is a cool season vegetable that has a tendency to bolt in long day and high temperature environments. In this study, lettuce plants were exposed to two temperature transfers to evaluate the pattern of biomass accumulation, stem elongation and bolting. Plants were reciprocally transferred between two temperatures (13 and 25°C). A negative co relation was found between the temperature and shoot growth as well as dry weight. However, stem extension was positively correlated with high temperature. Lettuce plants had 46% higher shoot fresh weights at a constant temperature of 13°C, than those grown at a constant 25°C. The positive correlation between high temperature and stem elongation was a function of the duration of exposure to high temperature. However, bolting was distinguishable from stem elongation. Overall results indicated that plants could revert back to head formation even after two weeks of high temperature-induced stem elongation. However, constant exposure to high temperature causes bolting without head formation.

Original languageEnglish
Pages (from-to)95-101
Number of pages7
JournalPakistan Journal of Agricultural Sciences
Volume55
Issue number1
DOIs
Publication statusPublished - Mar 1 2018

Fingerprint

Ice Cover
Lactuca sativa var. capitata
Lettuce
iceberg
stem elongation
exposure duration
stem
Temperature
temperature
bolting
lettuce
shoot growth
bolt
vegetable
Head
exposure
effect
Weights and Measures
shoot
bolts

Keywords

  • Head formation
  • Heat
  • Lettuce
  • Stem extension
  • Transfer time

ASJC Scopus subject areas

  • Food Science
  • Agronomy and Crop Science
  • Soil Science
  • Plant Science

Cite this

Effect of high temperature and exposure duration on stem elongation of iceberg lettuce. / Al-Said, Fahad; Hadley, Paul; Pearson, Simon; Khan, Muhammad; Iqbal, Qumer.

In: Pakistan Journal of Agricultural Sciences, Vol. 55, No. 1, 01.03.2018, p. 95-101.

Research output: Contribution to journalArticle

Al-Said, Fahad ; Hadley, Paul ; Pearson, Simon ; Khan, Muhammad ; Iqbal, Qumer. / Effect of high temperature and exposure duration on stem elongation of iceberg lettuce. In: Pakistan Journal of Agricultural Sciences. 2018 ; Vol. 55, No. 1. pp. 95-101.
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