Effects of different light-emitting diode (LED) light quality on growth, development and photosynthetic characteristics of Jinqiu Shatangju seedlings

doi:10.3969/j.issn.1004-1524.2022.01.11

Acta Agriculturae Zhejiangensis ›› 2022, Vol. 34 ›› Issue (1): 89-97.DOI: 10.3969/j.issn.1004-1524.2022.01.11

• Horticultural Science • Previous Articles Next Articles

Effects of different light-emitting diode (LED) light quality on growth, development and photosynthetic characteristics of Jinqiu Shatangju seedlings

YANG Chao¹(), LIU Minzhu¹, LI Qiang², HAN Tao², PENG Liangzhi¹, LING Lili¹^,^*(), FU Xingzheng¹, CHUN Changpin¹, CAO Li¹, HE Yizhong¹

1. National Citrus Engineering Reseach Center/Citrus Research Insititute, Southweast University, Chongqing 400712, China
2. Chongqing Key Laboratory of Environmental Materials & Remediation Technologies/College of Chemical and Environmental Engineering, Chongqing University of Arts and Sciences, Chongqing 402160, China

Received:2021-01-28 Online:2022-01-25 Published:2022-02-05
Contact: LING Lili

Abstract

Abstract:

In order to clarify the influence of different light-emitting diode (LED) light quality on growth, development and photosynthetic characteristics of Jinqiu Shatangju, Jinqiu shatangju container seedlings with trifoliate orange as the rootstock were used as the experimental materials, six light quality treatments [red light (R), blue light (B), red and blue composite light (RB11, RB21, RB41, RB81)] were set up in this study with white light (W) as the control. Phenotypic index, biomass, photosynthetic pigment content and photosynthetic characteristic parameters of the newly grown stems and leaves were measured after two months treatment, and the principal component analysis was performed on the relevant indicators. The results showed that red light significantly promoted elongation of new shoots, increased the number of leaves, leaf area and biomass, and inhibited thickening of stems and leaves, while effect of blue light was opposite to that of red light. Low proportion of red light also significantly promoted the elongation of new shoots, made stem thicker, increased number of leaves, leaf area and biomass, however, as the proportion of red light increased, growth trend was significantly reduced. Stem length, stem thickness, number of leaves and leaf area of compound light RB11 were 1.97 times (P<0.05), 1.14 times (P>0.05), 2.05 times (P<0.05), 1.84 times (P<0.05) of the control, respectively. Fresh weight and dry weight of new shoots were 1.68 times (P<0.05), 1.88 times (P<0.05) of the control. Fresh weight of leaves and stems, dry weight of leaves and stems were 1.46 times (P>0.05), 3.00 times (P<0.05), 1.68 times (P<0.05), 3.06 times (P<0.05) of the control. Red light and blue light all lead to a significant decrease in photosynthetic pigment content and net photosynthetic rate (P_n), while red-blue composite light promoted increase of chlorophyll b (chlb), carotenoid (car) content and P_n. In addition, increasing the proportion of red light, content of chlorophyll and car, as well as chla/chlb and P_n showed significant decreasing trend. All treatment light led to a decreasing trend in stomatal conductance (G_s) (except RB41 treatment) and transpiration rate (T_r) (except RB21 and RB41 treatments). Through principal component analysis, it could be found that the red-blue 1:1 compound light (RB11) was more conducive to growth and development, material accumulation and photosynthesis of new shoots of Jinqiu Shatangju. This study provided a theoretical basis for establishment of LED light supplement technology for rapid propagation of Jinqiu Shatangju seedlings.

Key words: Jinqiu Shatangju, light quality, growth and development, photosynthetic characteristics

CLC Number:

S628

YANG Chao, LIU Minzhu, LI Qiang, HAN Tao, PENG Liangzhi, LING Lili, FU Xingzheng, CHUN Changpin, CAO Li, HE Yizhong. Effects of different light-emitting diode (LED) light quality on growth, development and photosynthetic characteristics of Jinqiu Shatangju seedlings[J]. Acta Agriculturae Zhejiangensis, 2022, 34(1): 89-97.

Figures/Tables 8

References 35

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处理 Treatment	峰值 Peak value/nm	峰宽 Peak width/nm
CK	450,590	400-500,500-800
B	450	400-500
R	660	600-700
RB11	450,660	400-500,580-800
RB21	450,660	400-500,580-800
RB41	450,660	400-500,580-800
RB81	450,660	400-500,580-800

处理 Treatment	峰值 Peak value/nm	峰宽 Peak width/nm
CK	450,590	400-500,500-800
B	450	400-500
R	660	600-700
RB11	450,660	400-500,580-800
RB21	450,660	400-500,580-800
RB41	450,660	400-500,580-800
RB81	450,660	400-500,580-800

处理 Treatment	茎长 Stem length/cm	茎粗 Stem diameter/cm	叶片数 Leaf number	叶厚 Leaf thick/cm	叶面积 Leaf area/cm²
CK	11.93±3.30 b	2.81±0.33 ab	8.3±1.5 bc	0.23±0.01 a	11 698.8±2 620.0 c
B	10.57±1.31 b	2.87±0.47 ab	6.3±1.2 c	0.23±0.07 a	8 050.3±990.7 d
R	21.13±0.40 a	2.64±0.46 ab	14.3±0.6 a	0.17±0.02 b	23 782.6±1 807.5 a
RB11	23.53±2.66 a	3.20±0.21 a	17.0±2.0 a	0.23±0.02 a	21 571.1±4 189.5 ab
RB21	19.83±2.42 a	3.00±0.14 ab	10.3±2.5 b	0.24±0.01 a	16 457.8±4 684.4 bc
RB41	7.47±2.42 b	2.23±0.10 b	6.0±1.0 c	0.23±0.01 a	11 020.5±2 076.8 cd
RB81	6.97±1.67 b	2.21±0.12 b	5.3±1.2 c	0.21±0.03 ab	10 713.6±2 297.2 cd

处理 Treatment	茎长 Stem length/cm	茎粗 Stem diameter/cm	叶片数 Leaf number	叶厚 Leaf thick/cm	叶面积 Leaf area/cm²
CK	11.93±3.30 b	2.81±0.33 ab	8.3±1.5 bc	0.23±0.01 a	11 698.8±2 620.0 c
B	10.57±1.31 b	2.87±0.47 ab	6.3±1.2 c	0.23±0.07 a	8 050.3±990.7 d
R	21.13±0.40 a	2.64±0.46 ab	14.3±0.6 a	0.17±0.02 b	23 782.6±1 807.5 a
RB11	23.53±2.66 a	3.20±0.21 a	17.0±2.0 a	0.23±0.02 a	21 571.1±4 189.5 ab
RB21	19.83±2.42 a	3.00±0.14 ab	10.3±2.5 b	0.24±0.01 a	16 457.8±4 684.4 bc
RB41	7.47±2.42 b	2.23±0.10 b	6.0±1.0 c	0.23±0.01 a	11 020.5±2 076.8 cd
RB81	6.97±1.67 b	2.21±0.12 b	5.3±1.2 c	0.21±0.03 ab	10 713.6±2 297.2 cd

处理 Treatment	新梢鲜重 New shoot fresh mass/g	新梢干重 New shoot dry mass/g	干鲜重比 Ratio of dry mass to fresh mass	叶鲜重 Leaf fresh mass/g	茎鲜重 Stem fresh mass/g	叶干重 Leaf dry mass/g	茎干重 Stem dry mass/g
CK	3.99±1.42 c	1.12±0.43 c	0.28±0.01 bc	3.45±1.22 bc	0.55±0.19 c	0.96±0.37 b	0.16±0.06 c
B	3.70±0.43 c	1.27±0.15 c	0.34±0.01 a	3.19±0.30 c	0.51±0.14 c	1.11±0.09 ab	0.16±0.06 c
R	7.53±1.43 a	2.05±0.41 ab	0.27±0.01 bc	5.84±1.14 a	1.69±0.33 a	1.58±0.39 a	0.47±0.02 a
RB11	6.69±0.82 ab	2.10±0.40 a	0.31±0.03 ab	5.04±0.71 ab	1.65±0.12 a	1.61±0.40 a	0.49±0.01 a
RB21	5.49±1.40 bc	1.47±0.30 bc	0.27±0.03 c	4.43±1.29 abc	1.06±0.11 b	1.13±0.26 ab	0.34±0.04 b
RB41	4.22±0.97 c	1.36±0.33 c	0.32±0.03 a	3.75±0.75 bc	0.47±0.24 c	1.23±0.29 a	0.13±0.06 c
RB81	3.72±1.14 c	0.91±0.20 c	0.25±0.03 c	3.31±0.99 c	0.40±0.16 c	0.80±0.17 b	0.11±0.03 c

Effects of different light-emitting diode (LED) light quality on growth, development and photosynthetic characteristics of Jinqiu Shatangju seedlings

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处理Treatment	chla/(mg·g^-1)	chlb/(mg·g^-1)	chl(a+b)/(mg·g^-1)	chla/chlb	car/(mg·g^-1)
CK	2.45±0.28 a	0.70±0.07 ab	3.15±0.34 a	3.52±0.24 ab	0.42±0.09 abc
B	1.86±0.42 ab	0.50±0.13 c	2.36±0.54 b	3.73±0.42 a	0.35±0.09 c
R	1.65±0.51 b	0.47±0.12 c	2.12±0.63 c	3.49±0.28 ab	0.36±0.12 bc
RB11	2.41±0.22 a	0.80±0.09 a	3.21±0.30 a	3.01±0.17 c	0.52±0.05 a
RB21	2.26±0.13 ab	0.71±0.02ab	2.97±0.14 ab	3.20±0.16 bc	0.51±0.04 ab
RB41	2.17±0.20 ab	0.71±0.08 ab	2.88±0.28 ab	3.06±0.17 bc	0.50±0.05 ab
RB81	1.72±0.41 b	0.55±0.16 bc	2.27±0.57 b	3.17±0.25 bc	0.39±0.08 abc

处理Treatment groups	P_n/(μmol·m^-2·s^-1)	G_s/(mmol·m^-2·s^-1)	C_i/(μmol·mol^-1)	T_r/(μmol·m^-2·s^-1)
CK	2.20±0.48 c	0.13±0.05 a	354.1±20.6 ab	2.89±1.00 a
B	1.54±0.01 d	0.11±0.02 ab	363.3±7.1 a	2.69±0.42 ab
R	1.32±0.31 d	0.06±0.03 c	350.3±20.6 ab	0.79±0.31 d
RB11	3.82±1.06 a	0.09±0.05 bc	301.5±29.4 c	1.49±0.78 c
RB21	3.26±0.26 a	0.12±0.04 ab	349.9±12.6 b	3.26±0.67 ab
RB41	2.84±0.90 b	0.15±0.03 a	353.5±17.4 ab	3.02±0.40 a
RB81	2.86±0.54 b	0.11±0.03 ab	344.7±21.7 ab	2.18±0.38 b

处理Treatment	成分Component			综合得分Comprehensive score	排序Ranking
CK	-0.615 1	0.375 8	0.623 1	-0.138 7	4
B	-0.781 9	-0.731 2	1.609 2	-0.461 0	6
R	1.331 0	-1.633 3	-0.135 4	0.168 4	3
RB11	1.450 2	1.138 9	0.072 2	1.075 1	1
RB21	0.104 0	0.833 0	-0.005 0	0.300 4	2
RB41	-0.650 8	0.585 3	-0.508 8	-0.199 6	5
RB81	-0.837 5	-0.568 5	-1.655 3	-0.744 6	7

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