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Effects of Light‐Emitting Diodes on the Growth of Peanut Plants
Author(s) -
Li Cheng,
Liu Dan,
Li Lili,
Hu Shaoxin,
Xu Zhigang,
Tang Canming
Publication year - 2018
Publication title -
agronomy journal
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.752
H-Index - 131
eISSN - 1435-0645
pISSN - 0002-1962
DOI - 10.2134/agronj2017.11.0674
Subject(s) - photosynthesis , arachis hypogaea , light emitting diode , starch , chlorophyll , point of delivery , chlorophyll b , light intensity , seedling , dry weight , photoperiodism , arachis , horticulture , industrial crop , chemistry , sucrose , botany , biology , food science , materials science , solanaceae , optics , optoelectronics , physics , biochemistry , gene
Core Ideas The ratio R/B = 3:7 light can be used for peanut industry cultivation. By increasing B light‐emitting diode can improve the photosynthetic intensity of peanut leaves. Peanuts can be produced using factory cultivation without the need for land.Light‐emitting diodes (LEDs) are a new type of energy‐saving light source, and their effects on the growth of peanut ( Arachis hypogaea L.) plants remain unknown. This study aimed to determine the effects of LEDs on the growth of peanut plants. Plants were exposed to 300 μmol/m 2 /s photosynthetic photon flux density under a 12 h photoperiod and six different treatments: monochromatic red (R) LED, monochromatic blue (B) LED, three R plus B LED mixtures (7:3, 1:1, 3:7), and fluorescent lamps (FL). At the seedling stage, the fresh weight, dry weight, height, root length, and chlorophyll content were greatest in plants under R/B = 7:3 light. At the blooming stage, the starch concentration and soluble sugars were greatest in plants under R light followed by those under R/B = 1:1 light, the sucrose concentration was greatest under R/B = 7:3 light followed by R/B = 1:1 light, and the chlorophyll concentration was greatest under R/B = 1:1 light. These results showed that R/B = 1:1 light was conducive to peanut growth at the blooming stage. At the pod‐setting stage, the sucrose concentration and soluble sugars were greatest in plants under R/B = 1:1 light, and the starch content was greatest in plants under R/B = 3:7 light. The pod numbers and yields were greater in plants under R/B = 3:7 light than in plants under the other LED lights. R/B = 3:7 light was best for pod growth and yield and could be used as an alternative light source for peanut industry cultivation.

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