Cadmium accumulation characteristics and tolerance mechanism of 2 meadowsweet varieties

doi:10.3969/j.issn.1004-1524.20240960

Acta Agriculturae Zhejiangensis ›› 2025, Vol. 37 ›› Issue (11): 2283-2292.DOI: 10.3969/j.issn.1004-1524.20240960

• Horticultural Science • Previous Articles Next Articles

Cadmium accumulation characteristics and tolerance mechanism of 2 meadowsweet varieties

TAN Xinrui(), TANG Min, LIU Yan, WANG Meixian()

Beijing Laboratory of Urban and Rural Ecological Environment, National Engineering Research Center for Floriculture, Beijing Forestry University, Beijing 100083, China

Received:2024-11-09 Online:2025-11-25 Published:2025-12-08

Abstract

Abstract:

To investigate the cadmium (Cd) accumulation characteristics and tolerance mechanisms of Spiraea japonica Little Princess (abbreviated as SL) and Spiraea×bumalda Coccimea (abbreviated as SC), a pot experiment with simulated Cd contamination was conducted. The growth, physiological indexes, as well as the accumulation, distribution, and translocation characteristics of Cd in the two meadowsweet varieties were studied under stress conditions with different Cd contents (25, 50, 100, 200 mg·kg^-1, denoted as T₁ to T₄ treatments in sequence). The results showed that, compared with the control group (CK) without Cd addition, the T₂-T₄ treatments significantly (p<0.05) reduced the total plant biomass of SC by 22.4%-53.0%. Moreover, all Cd-added treatments significantly decreased the chlorophyll content in the leaves of the two meadowsweet varieties. Under the T₄ treatment, the relative electrical conductivity in the leaves of SL and SC was 1.17 times and 1.38 times of CK, respectively, while the malondialdehyde (MDA) content was 1.42 times and 1.92 times of CK, respectively. Between the two varieties, both the Cd tolerance index and bioconcentration factor of SC were lower than those of SL. The distribution ratio of Cd in the two meadowsweet varieties followed the order of root > stem > leaf. At the subcellular level, Cd was mainly accumulated in the cell wall, accounting for 59.12%-71.10% and 57.05%-62.47% of the total Cd under T₁-T₄ treatments in SC and SL, respectively. In terms of chemical forms, Cd mainly existed in the NaCl-extractable form, with proportions of 46.61%-57.86% and 60.51%-67.65% under T₁-T₄ treatments in SC and SL, respectively.

Key words: cadmium, accumulation characteristic, subcellular distribution, chemical forms, meadowsweet

CLC Number:

S682.11

TAN Xinrui, TANG Min, LIU Yan, WANG Meixian. Cadmium accumulation characteristics and tolerance mechanism of 2 meadowsweet varieties[J]. Acta Agriculturae Zhejiangensis, 2025, 37(11): 2283-2292.

Figures/Tables 10

References 42

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品种 Variety	处理 Treatment	株高 Plant height/cm	根长 Root length/cm
小公主	CK	32.87±3.31 a	27.56±3.04 a
Little Princess	T₁	31.03±2.65 a	25.80±1.86 a
	T₂	24.07±1.16 b	24.49±2.61 a
	T₃	25.53±2.55 b	22.40±3.09 a
	T₄	25.83±2.46 b	22.18±2.76 a
鲜红	CK	49.50±0.79 ab	31.90±4.16 a
Coccimea	T₁	48.70±2.26 ab	25.53±2.78 ab
	T₂	49.00±3.11 ab	25.38±3.67 ab
	T₃	50.53±2.08 a	20.66±2.93 b
	T₄	44.67±4.48 b	14.19±3.57 c

品种 Variety	处理 Treatment	株高 Plant height/cm	根长 Root length/cm
小公主	CK	32.87±3.31 a	27.56±3.04 a
Little Princess	T₁	31.03±2.65 a	25.80±1.86 a
	T₂	24.07±1.16 b	24.49±2.61 a
	T₃	25.53±2.55 b	22.40±3.09 a
	T₄	25.83±2.46 b	22.18±2.76 a
鲜红	CK	49.50±0.79 ab	31.90±4.16 a
Coccimea	T₁	48.70±2.26 ab	25.53±2.78 ab
	T₂	49.00±3.11 ab	25.38±3.67 ab
	T₃	50.53±2.08 a	20.66±2.93 b
	T₄	44.67±4.48 b	14.19±3.57 c

品种 Variety	处理 Treatment	不同部位的单株生物量Biomass of different parts per plant			整株生物量 Biomass of whole plant
品种 Variety	处理 Treatment	叶Leaf	茎Stem	根Root	整株生物量 Biomass of whole plant
小公主	CK	205.30±33.61 a	141.35±24.49 a	95.92±6.26 a	442.57±62.14 a
Little Princess	T₁	202.95±9.33 a	139.60±2.61 a	92.05±0.73 ab	434.60±7.73 a
	T₂	179.68±10.66 a	124.09±6.19 a	78.94±7.43 b	382.71±22.51 a
	T₃	180.66±15.81 a	126.56±11.58 a	78.64±9.08 b	385.85±35.77 a
	T₄	168.76±17.14 a	121.41±11.96 a	76.15±5.76 b	366.32±33.61 a
鲜红	CK	290.69±57.88 a	244.54±39.60 a	146.11±7.05 a	681.34±104.15 a
Coccimea	T₁	248.52±40.36 ab	234.13±14.83 ab	127.56±13.29 ab	610.21±48.82 ab
	T₂	223.37±2.15 ab	190.26±11.05 bc	114.70±8.20 bc	528.33±15.78 b
	T₃	208.29±20.36 b	181.08±16.52 cd	95.54±16.32 c	484.91±22.42 b
	T₄	125.89±50.45 c	129.99±44.37 d	63.99±12.15 d	319.87±105.86 c

品种 Variety	处理 Treatment	不同部位的单株生物量Biomass of different parts per plant			整株生物量 Biomass of whole plant
品种 Variety	处理 Treatment	叶Leaf	茎Stem	根Root	整株生物量 Biomass of whole plant
小公主	CK	205.30±33.61 a	141.35±24.49 a	95.92±6.26 a	442.57±62.14 a
Little Princess	T₁	202.95±9.33 a	139.60±2.61 a	92.05±0.73 ab	434.60±7.73 a
	T₂	179.68±10.66 a	124.09±6.19 a	78.94±7.43 b	382.71±22.51 a
	T₃	180.66±15.81 a	126.56±11.58 a	78.64±9.08 b	385.85±35.77 a
	T₄	168.76±17.14 a	121.41±11.96 a	76.15±5.76 b	366.32±33.61 a
鲜红	CK	290.69±57.88 a	244.54±39.60 a	146.11±7.05 a	681.34±104.15 a
Coccimea	T₁	248.52±40.36 ab	234.13±14.83 ab	127.56±13.29 ab	610.21±48.82 ab
	T₂	223.37±2.15 ab	190.26±11.05 bc	114.70±8.20 bc	528.33±15.78 b
	T₃	208.29±20.36 b	181.08±16.52 cd	95.54±16.32 c	484.91±22.42 b
	T₄	125.89±50.45 c	129.99±44.37 d	63.99±12.15 d	319.87±105.86 c

品种 Variety	处理 Treatment	不同部位的镉含量Cd conten in different parts of plant
品种 Variety	处理 Treatment	叶Leaf	茎Stem	根Root
小公主Little Princess	CK	0.04±0.01 d	0.13±0.01 e	0.51±0.13 e
	T₁	6.85±0.44 c	14.99±1.40 d	63.97±3.04 d
	T₂	15.66±1.68 b	27.89±5.71 c	78.61±4.03 c
	T₃	17.66±0.64 b	40.62±6.33 b	89.28±4.48 b
	T₄	26.55±2.54 a	55.51±7.16 a	99.23±6.03 a
鲜红Coccimea	CK	0.10±0.02 d	0.60±0.04 d	0.76±0.16 d
	T₁	6.71±0.51 c	16.24±3.45 c	16.94±1.04 c
	T₂	8.53±0.26 c	16.20±3.15 c	17.89±1.47 c
	T₃	11.64±1.03 b	23.81±0.96 b	41.44±7.04 b
	T₄	20.26±3.46 a	41.60±6.13 a	59.36±8.14 a

Cadmium accumulation characteristics and tolerance mechanism of 2 meadowsweet varieties

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品种 Variety	处理 Treatment	不同部位的生物富集系数Bioconcentration factor of different parts of plant			转移系数 Translocation factor	耐受系数 Tolerance index
品种 Variety	处理 Treatment	叶Leaf	茎Stem	根Root	转移系数 Translocation factor	耐受系数 Tolerance index
小公主	CK	0.16±0.02 a	0.56±0.05 a	2.22±0.56 a	0.72±0.05 a	—
Little Princess	T₁	0.14±0.01 ab	0.30±0.03 b	1.28±0.06 b	0.44±0.02 b	0.98±0.02 a
	T₂	0.16±0.02 a	0.28±0.06 b	0.79±0.04 bc	0.36±0.19 b	0.86±0.05 ab
	T₃	0.12±0.00 b	0.27±0.04 b	0.60±0.03 c	0.39±0.04 b	0.87±0.08 ab
	T₄	0.13±0.01 ab	0.28±0.04 b	0.50±0.03 c	0.41±0.05 b	0.83±0.08 b
鲜红	CK	0.49±0.07 a	2.60±0.19 a	3.30±0.69 a	3.08±0.27 a	—
Coccimea	T₁	0.13±0.01 b	0.32±0.07 b	0.34±0.02 b	0.46±0.07 b	0.90±0.07 a
	T₂	0.08±0.01 b	0.17±0.03 bc	0.18±0.01 b	0.25±0.03 b	0.78±0.02 ab
	T₃	0.08±0.01 b	0.16±0.01 c	0.28±0.05 b	0.24±0.01 b	0.71±0.03 b
	T₄	0.11±0.02 b	0.21±0.03 bc	0.30±0.04 b	0.31±0.05 b	0.47±0.16 c

品种 Variety	处理 Treatment	不同部位的生物富集系数Bioconcentration factor of different parts of plant			转移系数 Translocation factor	耐受系数 Tolerance index
品种 Variety	处理 Treatment	叶Leaf	茎Stem	根Root	转移系数 Translocation factor	耐受系数 Tolerance index
小公主	CK	0.16±0.02 a	0.56±0.05 a	2.22±0.56 a	0.72±0.05 a	—
Little Princess	T₁	0.14±0.01 ab	0.30±0.03 b	1.28±0.06 b	0.44±0.02 b	0.98±0.02 a
	T₂	0.16±0.02 a	0.28±0.06 b	0.79±0.04 bc	0.36±0.19 b	0.86±0.05 ab
	T₃	0.12±0.00 b	0.27±0.04 b	0.60±0.03 c	0.39±0.04 b	0.87±0.08 ab
	T₄	0.13±0.01 ab	0.28±0.04 b	0.50±0.03 c	0.41±0.05 b	0.83±0.08 b
鲜红	CK	0.49±0.07 a	2.60±0.19 a	3.30±0.69 a	3.08±0.27 a	—
Coccimea	T₁	0.13±0.01 b	0.32±0.07 b	0.34±0.02 b	0.46±0.07 b	0.90±0.07 a
	T₂	0.08±0.01 b	0.17±0.03 bc	0.18±0.01 b	0.25±0.03 b	0.78±0.02 ab
	T₃	0.08±0.01 b	0.16±0.01 c	0.28±0.05 b	0.24±0.01 b	0.71±0.03 b
	T₄	0.11±0.02 b	0.21±0.03 bc	0.30±0.04 b	0.31±0.05 b	0.47±0.16 c