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Effects of LED light quality on growth, physiology characteristics and alkaloids accumulations of Lycoris radiata*(PDF)

Chinese Journal of Applied & Environmental Biology[ISSN:1006-687X/CN:51-1482/Q]

Issue:
2019 06
Page:
1-10
Research Field:
Articles
Publishing date:

Info

Title:
Effects of LED light quality on growth, physiology characteristics and alkaloids accumulations of Lycoris radiata*
Author(s):
LI Qingzhu1 CAI Youming1 YANG Zhen1 YANG Liuyan1 ZHENG Yuhong2 SUN Yi1 LI Xin1 XU Junxu1 & ZHANG Yongchun1**
1 Forestry and Pomology Research Institute, Shanghai Academy of Agricultural Sciences, Shanghai Key Laboratory of Protected Horticultural Technology, Shanghai 201106, China
2 Institute of Botany, Jiangsu Province and Chinese Academy of Sciences, Nanjing 210014, China
Keywords:
Lycoris radiata LED light quality antioxidant enzymes physiological characteristics alkaloids accumulations
CLC:
-
PACS:
DOI:
10.19675/j.cnki.1006-687x.2019.01018
DocumentCode:

Abstract:
The experiment was conducted in order to explore the effects of different LED light quality on growth, physiological characteristics and alkaloids accumulations of Lycoris radiata seedlings, and to find the best light quality conditions for their growth and alkaloids productions through environmental regulation. Lycoris radiata seedlings were used as the experiment materials, and were cultured under different light emitting diodes (LEDs), including white light (CK), blue light (B), red light (R),and red and blue composite lights RB(1:2), RB(1:1), RB(2:1) to analyze the effects of different LEDs light qualities on growth, physiological characteristics of Lycoris radiata seedlings, so as to select the best LEDs quality for its growth and alkaloids productions. The results showed that: compared with the CK, the growth index of Lycoris radiata seedlings under red and blue composite lights were inproved, under RB(1:2) treatment, the plant fresh weight, plant dry weight, root length, root number, and bulb diameter were significantly increased by 158.69 %, 133.33 %, 10.91 %, 146.48 % and 34.92 %, respectively, compared to the CK; The R treatment had negetive effect on the biosynthesis of chlorophyll, a certain proportion of red and blue composite lights could promote chlorophyll synthesis, and RB (1:2) treatment had the highest chlorophyll content, which was 1.22 times higher than CK; RB (2:1) was beneficial to the accumulation of soluble sugar in Lycoris radiata seedlings, and blue light increased the content of soluble protein. Compared with CK, the MDA content, SOD and POD activities in Lycoris radiata seedlings under RB(1:2) treatment were significantly lower, indicating that RB (1:2) treatment could significantly reduce the degree of membrane lipid peroxidation. The galanthamine, lycorine and lycoramine contents of Lycoris radiata seedlings under B treatment were the highest, which were 1.84, 1.62 and 1.11 times higher than CK, respectively. In general, RB (1:2) treatment was beneficial to the growth, biomass accumulation as well as the synthesis of photosynthetic pigments of Lycoris radiata seedlings, and the degree of membrane lipid peroxidation was also low. RB (1:2) was the suitable light quality condition for the growth of Lycoris radiata seedlings. B treatment (blue light) could promote the accumulation of alkaloids. This study laid a theoretical foundation and technical support for the usage of LED light quality control technology in the production of high quality Lycoris radiata seedlings.

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Last Update: 2019-03-25