Effects of different shading rates on fruit quality and photosynthetic characteristics of sweet cherry

doi:10.3969/j.issn.1004-1524.20221338

Acta Agriculturae Zhejiangensis ›› 2023, Vol. 35 ›› Issue (10): 2346-2353.DOI: 10.3969/j.issn.1004-1524.20221338

• Horticultural Science • Previous Articles Next Articles

Effects of different shading rates on fruit quality and photosynthetic characteristics of sweet cherry

TANG Wenjing¹(), GONG Ronggao¹^,^*(), CHU Yuanqi¹, CHEN Chaoqun¹, CHEN Hongxu¹, RAN Maosheng², ZHANG Yao¹, YANG Wenlong¹

1. College of Horticulture, Sichuan Agricultural University, Chengdu 611130,China
2. Wenchuan County Bureau of Science and Technology, Agriculture and Animal Husbandry, Wenchuan 623000, Sichuan, China

Received:2022-09-14 Online:2023-10-25 Published:2023-10-31

Abstract

Abstract:

To explore the effects of different shading intensity on fruit quality and photosynthetic characteristics of sweet cherry, and to screen the optimal light conditions for the growth of sweet cherry, with Hongdeng as the material, the top of the tree was covered with sunshade net to simulate five treatments of full illumination (CK), shading rate 15% (A), shading rate 30% (B), shading rate 45% (C) and shading rate 60% (D) under different light intensities. To analyze the effects of different shading treatments on photosynthetic pigment content, net photosynthetic rate (P_n), transpiration rate (T_r), stomatal conductance (G_s), apparent quantum efficiency (AQY), light compensation point (LCP), dark respiration rate (R_d), light saturation point (LSP) and fruit quality of sweet cherry leaves. The results showed as follows: The sugar-acid ratio of sweet cherry fruits in treatment A was significantly higher than that in other treatments. With the increase of shading rate, anthocyanin, antioxidant capacity and total phenol increased first and then decreased, and there was no significant difference between treatment A and CK. The total amount of chlorophyll and carotenoid content of sweet cherry leaves were D>C>B>A>CK and C>D>B>CK>A. With the increase of shading rate, net photosynthetic rate (P_n), transpiration rate (T_r), stomatal conductance (G_s), apparent quantum efficiency (AQY), light compensation point (LCP), dark respiration rate (R_d) and light saturation point (LSP) increased first and then decreased. The photosynthetic capacity of treatment A was the strongest, while the growth and development of treatment B, C and D were limited by the severe lack of light energy. With the increase of shading rate, the color parameters lightness (L), red green (a) and yellow blue (b) values of A and B treatments and CK treatments were not significantly different, while the color parameters of C and D treatments was significantly higher than that of the control. The color difference pattern was the same as the color. It indicates that light shading is beneficial to improve the commercial property, and the best shading degree is within 15%.

Key words: sweet cherry, quality, photosynthetic characteristic, shading rate

CLC Number:

S662.5

TANG Wenjing, GONG Ronggao, CHU Yuanqi, CHEN Chaoqun, CHEN Hongxu, RAN Maosheng, ZHANG Yao, YANG Wenlong. Effects of different shading rates on fruit quality and photosynthetic characteristics of sweet cherry[J]. Acta Agriculturae Zhejiangensis, 2023, 35(10): 2346-2353.

Figures/Tables 8

References 28

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处理 Treatment	可溶性糖含量 Soluble sugar content/(mg·g^-1)	可滴定酸含量 Titratable acid content/(mg·g^-1)	糖酸比 Sugar acid ratio
CK	103.52±4.27 a	5.49±0.10 b	18.86±0.59 b
A	106.58±5.32 a	4.84±0.11 c	22.00±2.40 a
B	103.73±0.88 a	5.94±0.05 a	17.45±0.40 b
C	100.13±1.86 a	5.75±0.01 ab	17.41±0.52 b
D	84.57±4.88 b	5.06±0.04 c	16.73±1.19 b

处理 Treatment	可溶性糖含量 Soluble sugar content/(mg·g^-1)	可滴定酸含量 Titratable acid content/(mg·g^-1)	糖酸比 Sugar acid ratio
CK	103.52±4.27 a	5.49±0.10 b	18.86±0.59 b
A	106.58±5.32 a	4.84±0.11 c	22.00±2.40 a
B	103.73±0.88 a	5.94±0.05 a	17.45±0.40 b
C	100.13±1.86 a	5.75±0.01 ab	17.41±0.52 b
D	84.57±4.88 b	5.06±0.04 c	16.73±1.19 b

处理 Treatment	叶绿素a含量 Chlorophyll a content	叶绿素b含量 Chlorophyll b content	叶绿素总含量 Total chlorophyll content	类胡萝卜素含量 Carotenoids content
CK	1.073±0.031 b	0.475±0.005 b	1.549±0.026 c	0.525±0.003 b
A	1.089±0.005 b	0.463±0.005 b	1.552±0.008 c	0.493±0.016 b
B	1.208±0.015 a	0.463±0.003 b	1.670±0.017 b	0.533±0.010 b
C	1.202±0.019 a	0.493±0.015 b	1.695±0.006 b	0.664±0.044 a
D	1.223±0.037 a	0.578±0.075 a	1.801±0.040 a	0.652±0.071 a

处理 Treatment	叶绿素a含量 Chlorophyll a content	叶绿素b含量 Chlorophyll b content	叶绿素总含量 Total chlorophyll content	类胡萝卜素含量 Carotenoids content
CK	1.073±0.031 b	0.475±0.005 b	1.549±0.026 c	0.525±0.003 b
A	1.089±0.005 b	0.463±0.005 b	1.552±0.008 c	0.493±0.016 b
B	1.208±0.015 a	0.463±0.003 b	1.670±0.017 b	0.533±0.010 b
C	1.202±0.019 a	0.493±0.015 b	1.695±0.006 b	0.664±0.044 a
D	1.223±0.037 a	0.578±0.075 a	1.801±0.040 a	0.652±0.071 a

处理	P_n/(μmol·m^-2·s^-1)	T_r/(mol·m^-2·s^-1)	G_s/(mol·m^-2·s^-1)	C_i/(μmol ·mol^-1)	T/℃
Treatment
CK	11.097 1±0.062 1 b	0.001 2±0.001 1 b	0.140 4±0.001 6 b	243.926 6±2.307 3 a	30.200 0±1.000 a
A	12.323 6±0.163 1 a	0.001 4±0.004 0 a	0.151 8±0.004 1 a	244.943 6±1.553 3 a	28.300 0±1.100 b
B	10.953 3±0.248 5 b	0.001 2±0.003 4 b	0.124 4±0.003 7 c	234.481 7±1.093 6 b	25.300 0±0.900 c
C	10.160 9±0.171 4 c	0.001 1±0.001 3 c	0.126 1±0.001 6 c	247.407 5±3.877 6 a	25.200 0±0.700 c
D	8.424 9±0.136 0 d	0.000 9±0.001 0 d	0.098 0±0.001 0 d	241.549 4±1.724 6 a	24.600 0±0.500 c

Effects of different shading rates on fruit quality and photosynthetic characteristics of sweet cherry

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处理 Treatment	AQY	P_n (max)/ (μmol·m^-2·s^-1)	LSP/ (μmol·m^-2·s^-1)	LCP/ (μmol·m^-2·s^-1)	R_d/ (μmol·m^-2·s^-1)
CK	0.081 5±0.001 5 b	11.319 6±0.090 0 b	961.420 6±45.593 6 ab	27.492 2±0.500 5 a	2.005 5±0.000 6 a
A	0.089 1±0.000 4 a	13.758 6±0.266 5 a	1 069.426 7±22.457 9 a	28.868 0±1.102 1 a	2.314 6±0.068 5 a
B	0.078 6±0.000 1 b	10.786 8±0.056 8 b	912.118 6±73.851 6 ab	14.955 8±2.818 7 b	1.096 7±0.193 1 b
C	0.070 7±0.001 3 c	8.374 0±0.434 7 c	752.342 2±95.986 7 b	9.695 9±0.591 0 c	0.650 6±0.027 4 c
D	0.069 1±0.001 9 c	7.121 1±0.178 5 d	737.983 5±25.311 7 b	9.269 9±0.038 0 c	0.604 9±0.013 5 c

处理 Treatment	数量 Quantity	明度L Lightness	红绿值a Red green degree	黄蓝值b Yellow blue degree
CK	20	26.16±1.82 c	15.69±3.45 b	4.06±1.11 b
A	20	26.63±1.46 c	19.06±4.58 b	1.41±1.74 b
B	20	25.95±1.86 c	14.35±2.99 b	3.77±0.91 b
C	20	30.64±2.93 b	27.95±4.43 a	9.40±2.96 a
D	20	32.94±2.14 a	34.14±5.21 a	13.34±3.36 a

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处理 Treatment	CK	A	B	C
A	4.31
B	1.39	5.31
C	14.10	12.61	15.45
D	21.74	20.24	23.07	7.69

处理 Treatment	CK	A	B	C
A	4.31
B	1.39	5.31
C	14.10	12.61	15.45
D	21.74	20.24	23.07	7.69