Difference of Tolerance to Heavy Metal Zinc Stress of Five Sedum Plants

doi:10.7525/j.issn.1673-5102.2021.06.017

Abstract

Abstract:

For the pollution of farmland around zinc mines was seriours in China， so an ideal method to screen plant materials with strong resistance to zinc was needed. 5 Sedum plants including Sedum spectabile， S. aizoon， S. hybridum， S. lydium and S. spurium ‘Coccineum were used as materials and potted planting， the different concentrations of exogenous zinc（0，80，160，320，800，1600，2 000 mg·kg^-1） added on the plants growth（biomass and plants height ） and the tolerance of to heavy metal zinc stress of plants was compared and analyzed respectively. The results showed that：The biomass and height of 5 Sedum plants increased first and then decreased with the concentration of heavy metal zinc increased and the growth of plants was inhibited， of which Sedum aizoon and Sedum lydium suffered more severe from zinc toxicity； The maximum growth of 5 Sedum plants appeared in different zinc concentrations， and the increase rate becoming negative appeared in different zinc concentrations either； The R² values in linear analysis of growth and zinc stress of 5 Sedum plants were better， coefficient of regression equation could explain the promotion and inhibition rate of biomass and plant height of 5 Sedum plants， in terms of biomass， the growth promotion rate of S. spurium ‘Coccineum’ was largest， inhibition rate of S. hybridum was largest， and in terms of plant height， the growth promotion and inhibition rate of S. spectabile was largest.

Key words: zinc stress, Sedum, biomass, height of plant, differences

CLC Number:

Q945.79

Ying WANG, Hong-Bo XU, Yang WANG, Meng-Qian WANG, Cheng-Zhong WANG, Yuan-Sen YIN, Xue SUN, Hui ZHOU, Li-Huan ZHUO. Difference of Tolerance to Heavy Metal Zinc Stress of Five Sedum Plants[J]. Bulletin of Botanical Research, 2021, 41(6): 982-992.

Figures/Tables 8

Table 1

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Table 3

Fig.1

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Table 4

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理化指标 physical and chemical index	数值 Value
pH	6.92±0.12
有机质Organic matter（mg·kg^-1）	45.4±1.25
速效氮Available nitrogen（mg·kg^-1）	149±13.43
有效磷Available phosphorus（mg·kg^-1）	30.6±3.67
速效钾Available potassium（mg·kg^-1）	156±12.31
Zn含量 Zn content（mg·kg^-1）	66±13.57
有效Zn含量 Available Zn content（mg·kg^-1）	10.8±1.23

种类 Species		浓度Content（mg·kg^-1）
种类 Species		0	80	160	320	800	1 600	2 000
长药景天 S. spectabile	实际值 Actual value	7.93±2.02a	9.75±1.55ab	11.32±0.24b	8.95±1.41ab	8.73±1.42ab	8.33±1.81a	7.29±0.40a
长药景天 S. spectabile	相对值 Relative value	0±0A	28.31%±0.37A	50.66%±0.47A	22.00%±0.54A	15.67%±0.38A	10.03%±0.35A	-3.70%±0.26A
三七景天 S. aizoon	实际值 Actual value	11.19±1.34ab	12.21±2.39a	12.95±2.08a	8.92±1.79b	5.66±0.25c	4.81±1.51c	4.76±1.35c
三七景天 S. aizoon	相对值 Relative value	0±0AB	8.58%±0.10A	16.70%±0.23A	-18.45%±0.24B	-49.09%±0.04C	-57.27%±0.11C	-56.27%±0.16C
德国景天 S. hybridum	实际值 Actual value	0.84±0.11ab	1.05±0.10ab	1.16±0.34a	1.81±0.25c	1.60±0.33c	1.06±0.22ab	0.67±0.09b
德国景天 S. hybridum	相对值 Relative value	0±0AB	25.54%±0.11AB	31.33%±0.44AB	88.72%±0.41CD	43.87%±0.24AC	14.79%±0.12AB	-14.76%±0.16B
松塔景天 S. lydium	实际值 Actual value	1.29±0.40a	1.42±0.36a	1.32±0.40a	1.07±0.19ab	0.75±0.10bc	0.62±0.13bc	0.53±0.06c
松塔景天 S. lydium	相对值 Relative value	0±0AB	26.12%±0.81A	15.37%±0.67AB	-6.18%±0.53AB	-36.90%±0.24AB	-50.07%±0.11C	-56.39%±0.13C
胭脂红景天 S. spurium ‘Coccineum’	实际值 Actual value	0.37±0.05ab	0.50±0.16c	0.41±0.06ac	0.36±0.05ab	0.31±0.03ab	0.28±0.06ab	0.25±0.07b
胭脂红景天 S. spurium ‘Coccineum’	相对值 Relative value	0±0ABC	36.87%±0.39A	12.48%±0.25AB	-0.66%±0.27ABC	-14.12%±0.07BC	-23.38%±0.15BC	-30.99%±0.17C

种类 Species		浓度Content（mg·kg^-1）
种类 Species		0	80	160	320	800	1 600	2 000
长药景天 S. spectabile	实际值 Actual value	41.73±5.97ab	50.8±3.54ac	56.50±6.10c	53.93±7.31c	42.57±4.46ab	41.30±3.01a	38.03±5.28a
长药景天 S. spectabile	相对值 Relative value	0±0AB	23.44%±0.19AC	36.19%±0.12C	29.35%±0.03C	4.48%±0.27AB	-0.25%±0.09AB	-7.14%±0.21B
三七景天 S. aizoon	实际值 Actual value	53.97±4.11a	54.20±10.37a	54.80±1.77a	52.87±3.95a	41.83±0.21b	37.23±1.67b	32.60±0.82c
三七景天 S. aizoon	相对值 Relative value	0±0A	1.57%±0.25A	2.08%±0.11A	-1.93%±0.06A	-22.18%±0.06B	-30.89%±0.02B	-39.42%±0.04B
德国景天 S. hybridum	实际值 Actual value	32.20±3.74a	33.43±4.29a	33.80±0.61a	35.70±2.44a	34.37±0.31a	27.73±1.76b	25.47±0.47b
德国景天 S. hybridum	相对值 Relative value	0±0AB	4.41%±0.16AB	5.79%±0.11A	11.43%±0.09A	7.57%±0.11A	-13.04%±0.12B	-20.34%±0.07C
松塔景天 S. lydium	实际值 Actual value	32.97±0.38ab	35.57±0.98a	34.33±4.08ab	31.37±3.84b	28.40±1.97b	26.47±1.30c	25.07±0.71c
松塔景天 S. lydium	相对值 Relative value	0±0AB	7.87%±0.02A	4.08%±0.12AB	4.81%±0.12BC	13.89%±0.05CD	-19.74%±0.03D	-23.97%±0.02D
胭脂红景天 S. spurium ‘Coccineum’	实际值 Actual value	28.83±5.05ab	32.17±1.82a	29.80±1.30ab	27.70±2.08ab	27.23±1.22b	27.60±2.12ab	26.63±3.20b
胭脂红景天 S. spurium ‘Coccineum’	相对值 Relative value	0±0A	13.66%±0.20A	6.05%±0.23A	-2.72%±0.11A	-3.71%±0.17A	-3.10%±0.11A	-4.38%±0.28A

	范围 Range（mg·kg^-1）	pH值 pH value	均值 Mean value （mg·kg^-1）	参考文献 Reference
标准（背景值） Standars（Background value）	3~709		100	［12］
国家标准National standard		pH≤6.5	200.0
		7.5<pH<6.5	250.0
		pH＜7.5	300.0
湖南省桂阳县市黄沙坪某铅锌矿周边的农田土壤 Paddy soils near a zinc-lead mining area in Guiyang County，Hunan Province	1 322~3 786		1908.0	［13］
葫芦岛锌厂Huludao Zinc factory	83~1 670		367.0	［14］
广西壮族自治区东北部铅锌矿Lead and zinc mine in Guangx	79.9~11 500		541.4	［15］
福建省西部山区某铅锌矿区下游农田土壤 Paddy soils in the lower reaches of a lead-zinc mining area in the western mountainous area of Fujian Province	146.8~1 580		736.3	［16］
湘、渝、黔边陲县 Paddy soils located in Hunan，Chongqing，Guangxi border counties	148~3 267		612.3	［17］
沘江两岸农田土壤 Paddy soils on both sides of Bi River	59.7~6 910		933.4	［18］
会泽县者海镇铅锌矿区周边农田土壤 Paddy soils surrounding a Pb-Zn mining in Huize County，Zhehai Town	135.5~22 676.32		1465.0	［19］
广东省梅州市梅县丙村镇铅锌尾矿库农田 Paddy soils surrounding a Pb-Zn tailing pond in Guangdong Province	45.89~2 847.48		321.8	［20］
洛阳西南部某铅锌尾矿库农田土壤 Paddy soils in a lead-zinc tailings area，southwest of Luoyang，Henan	376.67~1 084.99		628.3	［21］
云南省会泽县某铅锌矿周边农田土壤 Paddy soils Pb-Zn Mine near Huize Country，Yunnan Province	183~697		337.8	［22］

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