International journal of

ADVANCED AND APPLIED SCIENCES

EISSN: 2313-3724, Print ISSN:2313-626X

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 Volume 5, Issue 10 (October 2018), Pages: 22-27

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 Original Research Paper

 Title: Morphological response of tomato seedling under two periods of different red and blue photon flux ratio

 Author(s): Napat Watjanatepin 1, *, Hanshik Chung 2, Chalermpol Ruangpattanawiwat 1

 Affiliation(s):

 1Faculty of Engineering and Architecture, Rajamangala University of Technology Suvarnabhumi, Nonthaburi, Thailand
 2Faculty of Mechanical and Energy, Gyeongsang National University, Tongyeong, South Korea

 https://doi.org/10.21833/ijaas.2018.10.004

 Full Text - PDF          XML

 Abstract:

Previous researches demonstrated beneficial effects of the red (R) and blue (B) LED light for plant growth and development under the single format of the light spectrum. In these studies, the light spectra, intensities, and light hour controlled by growers in the growth chamber by supplying LED light with constant R/B ratio during the experimental period were indicated as important parameters. The purpose of this work is to investigate the effects of spectral distribution on the morphological growth of tomatoes seedling such as plant height, stem diameter, leaf area, leaf number, leaf thickness and leaf color, and to examine the effects of varying R/B LED light ratios between two periods of the young tomato. Tomatoes were soil-cultured with a 14-h photoperiod at 29/26℃, and 55%/75% relative humidity, under RB0.34+1.0 at 100-150 µmol m-2s-1 (varying between two periods), commercial LED growth light (RB1.75) at 100 µmol m-2s-1  (constant one period), and white LED at 100 µmol m-2s-1 (as a control) inside growth chambers for 25 days. The analysis of variance statistic was applied to determine the mean difference of data. The results found that the tomato seedling under (RB0.34+1.0) has the best PAR spectrum to support the highest stem diameter, leaf thickness, and leaf color (highest chlorophyll content). Moreover, the tomato seedling grown under commercial LED light is also acceptable. The advantage of RB0.34+1.0 treatment is very good for promoting high quality tomato seedlings, perfect leaf and stem, for reducing the stem damage on the transplants, and increasing the tomato production. 

 © 2018 The Authors. Published by IASE.

 This is an open access article under the CC BY-NC-ND license (http://creativecommons.org/licenses/by-nc-nd/4.0/).

 Keywords: Commercial LED grow light, Two period supplies of light, R/B ratio, PAR spectrum, Photon flux ratio

 Article History: Received 6 May 2018, Received in revised form 4 August 2018, Accepted 10 August 2018

 Digital Object Identifier: 

 https://doi.org/10.21833/ijaas.2018.10.004

 Citation:

  Watjanatepin N, Chung H, and Ruangpattanawiwat C (2018). Morphological response of tomato seedling under two periods of different red and blue photon flux ratio. International Journal of Advanced and Applied Sciences, 5(10): 22-27

 Permanent Link:

 http://www.science-gate.com/IJAAS/2018/V5I10/Napat.html

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