Effects of Cadmium Stress on Carbon Sequestration and Oxygen Release Characteristics in A Landscaping Hyperaccumulator-Lonicera japonica Thunb.

被引：6

作者：

Liu, Zhouli ^{[1
,2
]}

An, Jing ^{[3
]}

Lu, Qingxuan ^{[1
,2
]}

Yang, Chuanjia ^{[4
]}

Mu, Yitao ^{[5
]}

Wei, Jianbing ^{[1
,2
]}

Hou, Yongxia ^{[1
,2
]}

Meng, Xiangyu ^{[1
,2
]}

Zhao, Zhuo ^{[1
,2
]}

Lin, Maosen ^{[6
]}

机构：

[1] Shenyang Univ, Coll Life Sci & Engn, Shenyang 110044, Peoples R China

[2] Northeast Geol S&T Innovat Ctr China Geol Survey, Shenyang 110000, Peoples R China

[3] Chinese Acad Sci, Inst Appl Ecol, Key Lab Pollut Ecol & Environm Engn, Shenyang 110016, Peoples R China

[4] China Med Univ, Shengjing Hosp, Dept Gen Surg, Shenyang 110004, Peoples R China

[5] Shenyang Urban Construct Univ, Coll Municipal & Environm Engn, Shenyang 110167, Peoples R China

[6] Shenyang Agr Univ, Coll Water Conservancy, Shenyang 110161, Peoples R China

来源：

PLANTS-BASEL | 2023年 / 12卷 / 14期

基金：

中国国家自然科学基金;

关键词：

heavy metal; Lonicera japonica Thunb; carbon sequestration; oxygen release; PHOTOSYNTHETIC CAPACITY; CD; TOLERANCE; ACCUMULATION; HORMESIS; GROWTH; PHYTOREMEDIATION; RESPONSES; TOXICITY; EXPOSURE;

D O I：

10.3390/plants12142689

中图分类号：

Q94 [植物学];

学科分类号：

071001 ;

摘要：

The carbon sequestration and oxygen release of landscape plants are dominant ecological service functions, which can play an important role in reducing greenhouse gases, improving the urban heat island effect and achieving carbon peaking and carbon neutrality. In the present study, we are choosing Lonicera japonica Thunb. as a model plant to show the effects of Cd stress on growth, photosynthesis, carbon sequestration and oxygen release characteristics. Under 5 mg kg-1 of Cd treatment, the dry weight of roots and shoots biomass and the net photosynthetic rate (P<INF>N</INF>) in L. japonica had a significant increase, and with the increase in Cd treatment concentration, the dry weight of roots and shoots biomass and P<INF>N</INF> in the plant began to decrease. When the Cd treatment concentration was up to 125 mg kg-1, the dry weight of root and shoots biomass and P<INF>N</INF> in the plant decreased by 5.29%, 1.94% and 2.06%, and they had no significant decrease compared with the control, indicating that the plant still had a good ability for growth and photoenergy utilization even under high concentrations of Cd stress. The carbon sequestration and oxygen release functions in terms of diurnal assimilation amounts (P), carbon sequestration per unit leaf area (W<INF>CO<INF>2</INF></INF>), oxygen release per unit leaf area (W<INF>O<INF>2</INF></INF>), carbon sequestration per unit land area (P<INF>CO<INF>2</INF></INF>) and oxygen release per unit land area (P<INF>O<INF>2</INF></INF>) in L. japonica had a similar change trend with the photosynthesis responses under different concentrations of Cd treatments, which indicated that L. japonica as a landscaping Cd-hyperaccumulator, has a good ability for carbon sequestration and oxygen release even under high concentrations of Cd stress. The present study will provide a useful guideline for effectively developing the ecological service functions of landscaping hyperaccumulators under urban Cd-contaminated environment.

引用

页数：9

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