Photoperiod and light spectrum effects on growth, pigment and ascorbic acid content of Lactuca sativa cv. Fire Red under controlled growth environment

E. I. Ngilah, F. Y. Tsan, Boon Kar Yap

Research output: Contribution to journalArticle

Abstract

The application of Light Emitting Diodes (LEDs) in agricultural sector has become popular in recent years. LEDs can even be used in total absence of natural sunlight in raising indoor vegetables and ornamental plants. Appropriate light spectral regions must be studied according to crop species or varieties, especially for plants with high commercial values. The present experiment was conducted to determine the effects of monochromic LED of Red (R) and Blue (B), and their combinations at 1:1, 1:2 and 2:1,at 18 W and 240 V, on production of Lactuca sativa cv. Fire Red in controlled laboratory environment in total absence of natural light. Each LED irradiation treatment was assigned as sub plot with photoperiods (PPs) ranging from 12 h to 18 has main plots in a split plot design to study their combined effects on growth, pigment and ascorbic acid (AA) contents of this attractive red colour vegetable. Seedlings in moist jiffy blocks at one week after sowing were transferred to polyvinyl chloride (PVC) troughs of 5 cm diameter containing quarter strength Hoagland solution at electrical conductivity ranging from 1,100 to 1,300 μS/cm and pH 6-7. Plants were grown with nutrient film technique at a distance of approximately 8 cm below LED. Results obtained showed that R was not appropriate for growing this vegetable while analysis of variance indicated that plants irradiated with B gained the greatest plant height at five weeks at harvest, but these plants had the lowest number of leaves. Highest fresh weight (FW) as marketing attribute of this vegetable was obtained with 18 h PP. When combined 18 h PP with BR or 2BR, it was the best for production of L. sativa cv. Fire Red with the highest anthocyanin content.

Original languageEnglish
Pages (from-to)1300-1308
Number of pages9
JournalInternational Food Research Journal
Volume25
Issue number3
Publication statusPublished - 01 Jan 2018

Fingerprint

Controlled Environment
Lettuce
Photoperiod
Lactuca sativa
Ascorbic Acid
photoperiod
ascorbic acid
pigments
Light
Vegetables
Growth
vegetables
solar radiation
nutrient film technique
poly(vinyl chloride)
vegetable growing
agricultural industry
Electric Conductivity
Anthocyanins
ornamental plants

All Science Journal Classification (ASJC) codes

  • Food Science

Cite this

@article{4882e2e163374af2ac19e5ae3559a158,
title = "Photoperiod and light spectrum effects on growth, pigment and ascorbic acid content of Lactuca sativa cv. Fire Red under controlled growth environment",
abstract = "The application of Light Emitting Diodes (LEDs) in agricultural sector has become popular in recent years. LEDs can even be used in total absence of natural sunlight in raising indoor vegetables and ornamental plants. Appropriate light spectral regions must be studied according to crop species or varieties, especially for plants with high commercial values. The present experiment was conducted to determine the effects of monochromic LED of Red (R) and Blue (B), and their combinations at 1:1, 1:2 and 2:1,at 18 W and 240 V, on production of Lactuca sativa cv. Fire Red in controlled laboratory environment in total absence of natural light. Each LED irradiation treatment was assigned as sub plot with photoperiods (PPs) ranging from 12 h to 18 has main plots in a split plot design to study their combined effects on growth, pigment and ascorbic acid (AA) contents of this attractive red colour vegetable. Seedlings in moist jiffy blocks at one week after sowing were transferred to polyvinyl chloride (PVC) troughs of 5 cm diameter containing quarter strength Hoagland solution at electrical conductivity ranging from 1,100 to 1,300 μS/cm and pH 6-7. Plants were grown with nutrient film technique at a distance of approximately 8 cm below LED. Results obtained showed that R was not appropriate for growing this vegetable while analysis of variance indicated that plants irradiated with B gained the greatest plant height at five weeks at harvest, but these plants had the lowest number of leaves. Highest fresh weight (FW) as marketing attribute of this vegetable was obtained with 18 h PP. When combined 18 h PP with BR or 2BR, it was the best for production of L. sativa cv. Fire Red with the highest anthocyanin content.",
author = "Ngilah, {E. I.} and Tsan, {F. Y.} and Yap, {Boon Kar}",
year = "2018",
month = "1",
day = "1",
language = "English",
volume = "25",
pages = "1300--1308",
journal = "International Food Research Journal",
issn = "1985-4668",
publisher = "Universiti Putra Malaysia",
number = "3",

}

TY - JOUR

T1 - Photoperiod and light spectrum effects on growth, pigment and ascorbic acid content of Lactuca sativa cv. Fire Red under controlled growth environment

AU - Ngilah, E. I.

AU - Tsan, F. Y.

AU - Yap, Boon Kar

PY - 2018/1/1

Y1 - 2018/1/1

N2 - The application of Light Emitting Diodes (LEDs) in agricultural sector has become popular in recent years. LEDs can even be used in total absence of natural sunlight in raising indoor vegetables and ornamental plants. Appropriate light spectral regions must be studied according to crop species or varieties, especially for plants with high commercial values. The present experiment was conducted to determine the effects of monochromic LED of Red (R) and Blue (B), and their combinations at 1:1, 1:2 and 2:1,at 18 W and 240 V, on production of Lactuca sativa cv. Fire Red in controlled laboratory environment in total absence of natural light. Each LED irradiation treatment was assigned as sub plot with photoperiods (PPs) ranging from 12 h to 18 has main plots in a split plot design to study their combined effects on growth, pigment and ascorbic acid (AA) contents of this attractive red colour vegetable. Seedlings in moist jiffy blocks at one week after sowing were transferred to polyvinyl chloride (PVC) troughs of 5 cm diameter containing quarter strength Hoagland solution at electrical conductivity ranging from 1,100 to 1,300 μS/cm and pH 6-7. Plants were grown with nutrient film technique at a distance of approximately 8 cm below LED. Results obtained showed that R was not appropriate for growing this vegetable while analysis of variance indicated that plants irradiated with B gained the greatest plant height at five weeks at harvest, but these plants had the lowest number of leaves. Highest fresh weight (FW) as marketing attribute of this vegetable was obtained with 18 h PP. When combined 18 h PP with BR or 2BR, it was the best for production of L. sativa cv. Fire Red with the highest anthocyanin content.

AB - The application of Light Emitting Diodes (LEDs) in agricultural sector has become popular in recent years. LEDs can even be used in total absence of natural sunlight in raising indoor vegetables and ornamental plants. Appropriate light spectral regions must be studied according to crop species or varieties, especially for plants with high commercial values. The present experiment was conducted to determine the effects of monochromic LED of Red (R) and Blue (B), and their combinations at 1:1, 1:2 and 2:1,at 18 W and 240 V, on production of Lactuca sativa cv. Fire Red in controlled laboratory environment in total absence of natural light. Each LED irradiation treatment was assigned as sub plot with photoperiods (PPs) ranging from 12 h to 18 has main plots in a split plot design to study their combined effects on growth, pigment and ascorbic acid (AA) contents of this attractive red colour vegetable. Seedlings in moist jiffy blocks at one week after sowing were transferred to polyvinyl chloride (PVC) troughs of 5 cm diameter containing quarter strength Hoagland solution at electrical conductivity ranging from 1,100 to 1,300 μS/cm and pH 6-7. Plants were grown with nutrient film technique at a distance of approximately 8 cm below LED. Results obtained showed that R was not appropriate for growing this vegetable while analysis of variance indicated that plants irradiated with B gained the greatest plant height at five weeks at harvest, but these plants had the lowest number of leaves. Highest fresh weight (FW) as marketing attribute of this vegetable was obtained with 18 h PP. When combined 18 h PP with BR or 2BR, it was the best for production of L. sativa cv. Fire Red with the highest anthocyanin content.

UR - http://www.scopus.com/inward/record.url?scp=85049786035&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=85049786035&partnerID=8YFLogxK

M3 - Article

AN - SCOPUS:85049786035

VL - 25

SP - 1300

EP - 1308

JO - International Food Research Journal

JF - International Food Research Journal

SN - 1985-4668

IS - 3

ER -