Effect of red and blue light quality on growth physiological and flavonoid content of Ginkgo biloba seedlings

doi:10.12302/j.issn.1000-2006.202303030

JOURNAL OF NANJING FORESTRY UNIVERSITY ›› 2024, Vol. 48 ›› Issue (2): 105-112.doi: 10.12302/j.issn.1000-2006.202303030

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Effect of red and blue light quality on growth physiological and flavonoid content of Ginkgo biloba seedlings

WANG Gaiping¹(), ZHANG Lei¹, CAO Fuliang¹^,²^,^*(), DING Yanpeng¹^,³, ZHAO Qun¹, ZHAO Huiqin¹, WANG Zheng¹

1. Co-Innovation Center for Sustainable Forestry in Southern China, College of Forestry and Grassland, Nanjing Forestry University, Nanjing 210037, China
2. Jiangsu Vocational College of Agriculture and Forestry, Zhenjiang 212400, China
3. Fujian Forestry Prospect and Design Institute, Fuzhou 350001, China

Received:2023-03-25 Revised:2023-11-12 Online:2024-03-30 Published:2024-04-08

Abstract

Abstract:

【Objective】 This research aims to explore the effects of red and blue light quality on growth characteristics, morphogenesis and accumulation of secondary metabolites of Ginkgo biloba seedlings, in order to provide theoretical basis for selecting suitable light environment and improving leaf quality of G. biloba seedlings.【Method】 Taking 1-year-old seedlings of G. biloba as materials, under LED conditions,three different light qualities were set, namely red light(R), multiple light (light intensity ratio of red to blue is 1∶1, M) and blue light(B),and white light(W) was used as control to explore the dynamic change rule of growth physiology, photosynthetic capacity and flavonoids accumulation.【Result】 B treatment significantly increased the seedling height(P<0.05), and which of the R and M treatment was lower than W(CK). The leaves biomass, total biomass and leaves mass ratio of G. biloba seedlings under different light quality were lower than W(CK). R and M treatment were beneficial to the distribution of the biomass to the root, while B treatment was beneficial to the distribution of biomass to the stem. The leaves morphogenesis was significantly affected by different light quality, and the leaves width and area were lower than W(CK). R treatment significantly extended the petiole (P<0.05). M and B treatment significantly increased the contents of total chlorophyll and carotenoid, while R treatment had the opposite effect, and chlorophyll content increased with the extension of light treatment time. Under different light quality, net photosynthetic rate (Pn), transpiration rate (Tr) and stomatal conductance (Gs) of G.boloba seedling reached the maximum value at 84 days, and intercellular CO₂ concentration(Ci) changed little under different treatments.In the same treatment group,Pn and Tr were significantly lower than W(P<0.05), Gs under M and B treatment is also lower than that under W treatment.The contents of total flavonoids in G. biloba leaves were B, M, W, R treatment from high to low,and contents of total flavonoids under B and M treatment were significantly higher than that under W treatment, while contents under R treatment were on the contrary(P<0.05). The flavonoid yield of G. biloba single plant was also determined, and it was found that the falvonoid yield under B treatment was increased 75.65% than that under W treatment.【Conclusion】 Light quality treatment affects the growth and significant increase the accumulation of flavonoids of G. biloba, B and M treatment are ideal light quality. The results can provide theoretical basis for the application of light quality in the cultivation of G. biloba.

Key words: Ginkgo biloba, light quality, growth characteristics, morphogenesis, photosynthetic characteristics, total flavonoid

CLC Number:

S722
Q945

WANG Gaiping, ZHANG Lei, CAO Fuliang, DING Yanpeng, ZHAO Qun, ZHAO Huiqin, WANG Zheng. Effect of red and blue light quality on growth physiological and flavonoid content of Ginkgo biloba seedlings[J]. JOURNAL OF NANJING FORESTRY UNIVERSITY, 2024, 48(2): 105-112.

Figures/Tables 6

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光质处理 light treatment	苗高/ cm height	地径/mm ground diameter	总生物量/g total biomass	根质量比 root mass ratio	茎质量比 stem mass ratio	叶质量比 leaf mass ratio	根冠比 ratio of root to grown	质量参数 QI
W(CK)	16.98±0.50 b	4.76±0.12 a	3.49±0.22 a	0.42±0.01 b	0.30±0.01 b	0.27±0.01 a	0.74±0.04 b	0.86±0.08 a
R	16.02±0.80 bc	4.47±0.14 a	3.14±0.18 a	0.46±0.02 a	0.31±0.01 b	0.22±0.01 b	0.88±0.06 a	0.72±0.05 ab
M	14.39±0.30 c	4.94±0.13 a	3.14±0.15 a	0.47±0.01 a	0.30±0.01 b	0.22±0.01 b	0.90±0.03 a	0.87±0.05 a
B	20.42±0.60 a	4.68±0.13 a	3.03±0.20 a	0.41±0.01 b	0.36±0.01 a	0.22±0.01 b	0.71±0.04 b	0.61±0.05 b

光质处理 light treatment	叶长/mm leaf length	叶宽/mm leaf breadth	叶柄长/cm petiole length	叶数/片 leaf number	叶面积/cm² leaf area	叶生物量/g leaf biomass	含水率/% water content	叶形指数 leaf index
W(CK)	38.39±1.25 a	56.04±1.99 a	2.68±0.12 b	10.80±1.19 a	15.90±1.00 a	0.97±0.07 a	0.73±0.01 b	0.69±0.02 c
R	34.49±1.17 b	42.56±1.76 b	3.65±0.17 a	7.80±0.47 b	10.35±0.58 b	0.71±0.08 b	0.73±0.01 b	0.82±0.03 a
M	39.03±0.74 a	54.10±1.53 a	3.69±0.14 a	8.70±0.26 b	14.84±0.60 a	0.70±0.04 b	0.80±0.02 a	0.73±0.02 bc
B	39.47±1.85 a	51.08±1.60 a	3.78±0.11 a	7.90±0.28 b	14.37±0.86 a	0.68±0.06 b	0.75±0.01 b	0.77±0.03 ab

光质处理 light treatment	21 d	42 d	63 d	84 d
W	5.68±0.48 Ac	6.60±0.48 Ac	5.47±0.11 Ac	5.93±0.94 Ac
R	3.27±0.33 Bd	4.76±0.26 Ac	3.13±0.39 Bc	2.89±0.11 Bd
M	7.33±0.29 Cb	14.35±1.39 Ab	12.12±0.18 Bb	11.20±0.68 Bb
B	9.49±0.77 Ca	24.15±0.31 Aa	15.88±0.53 Ba	14.91±1.48 Ba

Effect of red and blue light quality on growth physiological and flavonoid content of Ginkgo biloba seedlings

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