Iranian Journal of Horticultural Science

Iranian Journal of Horticultural Science

The effect of blue and red spectrum combinations and light intensity on vegetative growth of Petunia seedling

Document Type : short paper

Authors
Azadeh Rashidi 1
Ali Tehranifar 2
Hossein Nemati 3
1 Former M. Sc. Student, Faculty of Agriculture, International Campus, University of Mashhad, Iran
2 Professor, Faculty of Agriculture, University of Mashhad, Iran
3 Assistant Professor, Faculty of Agriculture, University of Mashhad, Iran
10.22059/ijhs.2017.218893.1113
Abstract
To investigate the effect of light intensity and  light combinations on vegetative characteristics of petunia seedling(Petunia × hybrida 'Super cascade Blue'), an experiment was conducted as factorial in Completely Randomized Design with three replications Seedlings were treated for four weeks under two levels of light intensity includes 40 μmol.m-2.s-1and 60 μmol.m-2.s-1and three combinations of blue and red spectrum with ratios of 0% blue: 100% red, 15% blue: 85% red, 30% blue: 70% red and Fluorescent light. The result showed that fresh weight and dry weight, leaf area and stem caliper were superior less than 65 μmol.m-2.s-1 of 15% blue: 85% red ratio. Our results implied that specific light combination was able to compensate the negative effects of low light intensity because using 15% blue: 85% red ratio with 40 μmol.m-2.s-1compared to 0% blue: 100% red, 30% blue: 70% red and Fluorescent light at 60 μmol.m-2.s-1 light intensity lead to seedlings with superior vegetative characteristics.
Keywords
Artificial light
Carotenoids
Chlorophyll
LED
photosynthesis
Subjects
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Iranian Journal of Horticultural Science
Volume 48, Issue 2 - Serial Number 2
Summer 2017
Pages 443-446

  • Receive Date 02 January 2017
  • Revise Date 02 May 2017
  • Accept Date 15 May 2017