Blue Fluorescent Lamp and Blue LED showed Different Influences on Stem Elongation in Chrysanthemum morifolium Ramat. 'Reagan'

• SHIMIZU Hiroshi

  Graduate School of Agriculture Kyoto University

• ZHIYU Ma

  United Graduate School of Agricultural Science, Tokyo University of Agriculture and Technology

• TAZAWA Shinji

  Iwasaki Electric Co. Ltd.

Bibliographic Information

Other Title

• 青色蛍光灯と青色ＬＥＤではキクの茎伸長に与える影響が異なる
• セイショク ケイコウトウ ト セイショク LED デワ キク ノ クキ シンチョウ ニ アタエル エイキョウ ガ コトナル

Abstract

The effects of blue fluorescent lamp and blue LED (light emitting diode) on stem elonga- tion in Chrysanthemum morifolium Ramat.‘Reagan’ were studied to determine whether these light sources could be treated as equivalent.<BR>Cuttings of Chrysanthemum were grown in a growth chamber maintained at 20°C under photosynthetic photon flux (PPF) of 150μCmol s^-1m^-2 on the canopy level with a 14h photoperiod and 4h night interruption. After three weeks,rooted cuttings were moved to another growth chamber at 5°C for one month, and then they were transplanted to φ9cm plastic pots and grown for another week under the same conditions at 20°C.<BR>Growth chamber experiments were conducted to investigate the influence of blue fluorescent lamp and blue LED on stem elongation of Chrysanthemum. Other environmental conditions were PPF of 80μCmol s^-1m^-2 with a 24h photo period and temperature of 20°C. Daily stem elongation was 15.2 mm under blue LED and 8.8 mm under blue fluorescent lamp. There was a significant difference between the two values. The major peak wave length of blue fluorescent lamp was 436 nm with a second peak at 546 nm. The second experiment was conducted to examine effect of 546 nm. A spectrum similar to that of blue fluorescent lamp was created using blue LED and another LED of 545 nm. Daily stem elongation under blue +545 nm green LED was 6.9 mm and 11 mm under blue LED. There was also a significant difference between these two values. It was shown that the experimental results obtained under blue fluorescent lamp and blue LED are not equivalent.

Journal

• Shokubutsu Kankyo Kogaku

  Shokubutsu Kankyo Kogaku 20 (2), 98-101, 2008

  Japanese Society of Agricultural, Biological and Environmental Engineers and Scientists

Keywords

• daily stem elongation
• photoreceptor
• phytochrome
• spectrum

Details

• CRID: 1390001205232372224
• NII Article ID: 10021228849
• NII Book ID: AA12010914
• DOI: 10.2525/shita.20.98
• ISSN: 18803563
• ISSN: 18802028
• NDL BIB ID: 9536416
• Web Site: https://agriknowledge.affrc.go.jp/RN/2010760876
• Web Site: https://ndlsearch.ndl.go.jp/books/R000000004-I9536416
• Text Lang: ja
• Data Source:
  • JaLC
  • IRDB
  • NDL
  • Crossref
  • CiNii Articles
  • KAKEN
• Abstract License Flag: Disallowed