1
|
Sun D, Huang Y, Wang Z, Tang X, Ye W, Cao H, Shen H. Soil microbial community structure, function and network along a mangrove forest restoration chronosequence. THE SCIENCE OF THE TOTAL ENVIRONMENT 2024; 913:169704. [PMID: 38163592 DOI: 10.1016/j.scitotenv.2023.169704] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/19/2023] [Revised: 12/23/2023] [Accepted: 12/24/2023] [Indexed: 01/03/2024]
Abstract
Mangrove forests have high ecological, social and economic values, but due to environmental changes and human activities, natural mangrove forests have experienced serious degradations and reductions in distribution area worldwide. In the coastal zones of southern China, an introduced mangrove species, Sonneratia apetala, has been extensively used for mangrove restoration because of its rapid growth and strong environmental adaptability. However, little is known about how soil microorganisms vary with the restoration stages of the afforested mangrove forests. Here, we examined the changes in soil physicochemical properties and microbial biomass, community structure and function, and network in three afforested S. apetala forests with restoration time of 7, 12, and 18 years and compared them with a bare flat and a 60-year-old natural Kandelia obovata forest in a mangrove nature reserve. Our results showed that the contents of soil salinity, organic carbon, total nitrogen, ammonium nitrogen, and microbial biomass increased, while soil pH and bacterial alpha diversity decreased with afforestation age. Soil microbial community structure was significantly affected by soil salinity, organic carbon, pH, total nitrogen, ammonium nitrogen, available phosphorus, and available kalium, and susceptibility to environmental factors was more pronounced in bacterial than fungal community structure. The relative abundances of aerobic chemoheterotrophy were significantly higher in 12- and 18-year-old S. apetala than in K. obovata forest, while that of sulfate-reducing bacteria showed a decreasing trend with afforestation age. The abundance of dung saprotroph was significantly higher in 12- and 18-year-old S. apetala forests than in the natural forest. With the increasing afforestation age, the modularity of microbial networks increased, while stability and robustness decreased. Our results suggest that planting S. apetala contributes to improving soil fertility and microbial biomass but may make soil microbial networks more vulnerable.
Collapse
Affiliation(s)
- Dangge Sun
- Key Laboratory of Vegetation Restoration and Management of Degraded Ecosystems/Guangdong Provincial Key Laboratory of Applied Botany, South China Botanical Garden, Chinese Academy of Sciences, Guangzhou 510650, China; College of Resources and Environment, University of Chinese Academy of Sciences, Beijing 100049, China
| | - Yiyi Huang
- Key Laboratory of Vegetation Restoration and Management of Degraded Ecosystems/Guangdong Provincial Key Laboratory of Applied Botany, South China Botanical Garden, Chinese Academy of Sciences, Guangzhou 510650, China; College of Resources and Environment, University of Chinese Academy of Sciences, Beijing 100049, China
| | - Zhangming Wang
- Key Laboratory of Vegetation Restoration and Management of Degraded Ecosystems/Guangdong Provincial Key Laboratory of Applied Botany, South China Botanical Garden, Chinese Academy of Sciences, Guangzhou 510650, China
| | - Xuli Tang
- Key Laboratory of Vegetation Restoration and Management of Degraded Ecosystems/Guangdong Provincial Key Laboratory of Applied Botany, South China Botanical Garden, Chinese Academy of Sciences, Guangzhou 510650, China; College of Resources and Environment, University of Chinese Academy of Sciences, Beijing 100049, China
| | - Wanhui Ye
- Key Laboratory of Vegetation Restoration and Management of Degraded Ecosystems/Guangdong Provincial Key Laboratory of Applied Botany, South China Botanical Garden, Chinese Academy of Sciences, Guangzhou 510650, China; College of Resources and Environment, University of Chinese Academy of Sciences, Beijing 100049, China
| | - Honglin Cao
- Key Laboratory of Vegetation Restoration and Management of Degraded Ecosystems/Guangdong Provincial Key Laboratory of Applied Botany, South China Botanical Garden, Chinese Academy of Sciences, Guangzhou 510650, China; College of Resources and Environment, University of Chinese Academy of Sciences, Beijing 100049, China
| | - Hao Shen
- Key Laboratory of Vegetation Restoration and Management of Degraded Ecosystems/Guangdong Provincial Key Laboratory of Applied Botany, South China Botanical Garden, Chinese Academy of Sciences, Guangzhou 510650, China; College of Resources and Environment, University of Chinese Academy of Sciences, Beijing 100049, China.
| |
Collapse
|
2
|
Wang X, Jiang J, Dou F, Li X, Sun W, Ma X. Zinc Fertilizers Modified the Formation and Properties of Iron Plaque and Arsenic Accumulation in Rice ( Oryza sativa L.) in a Life Cycle Study. ENVIRONMENTAL SCIENCE & TECHNOLOGY 2022; 56:8209-8220. [PMID: 35623092 DOI: 10.1021/acs.est.2c01767] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/15/2023]
Abstract
This study examined the effect of three forms of zinc fertilizers on arsenic (As) accumulation and speciation in rice tissues over the life cycle of this cereal crop in a paddy soil. The formation and properties of iron plaque on rice roots at the maximum tillering stage and the mature stage were also determined. Elevated As at 5 mg/kg markedly lowered the rice yield by 86%; however, 100 mg/kg Zn fertilizers significantly increased the rice yield by 354-686%, regardless of the Zn form. Interestingly, only Zn2+ significantly lowered the total As in rice grains by 17% to 3.5 mg/kg and As(III) by 64% to around 0.5 mg/kg. Zinc amendments substantially hindered and, in the case of zinc oxide bulk particles (ZnOBPs), fully prevented the crystallization of iron oxides (Fe3O4 and Fe2O3) and silicon oxide (SiO2) and altered the composition of iron plaques on rice roots. SiO2 was first reported to be a significant component of iron plaque. Overall, ZnOBPs, ZnO nanoparticles, and Zn2+ displayed significant yet distinctive effects on the properties of iron plaque and As accumulation in rice grains, providing a fresh perspective on the potentially unintended consequences of different Zn fertilizers on food safety.
Collapse
Affiliation(s)
- Xiaoxuan Wang
- Zachry Department of Civil and Environmental Engineering, Texas A&M University, College Station, Texas 77843, United States
| | - Jiechao Jiang
- Department of Materials Science and Engineering, University of Texas Arlington, Arlington, Texas 76019, United States
| | - Fugen Dou
- Texas A&M AgriLife Research Center at Beaumont, Texas A&M University System, Beaumont, Texas 77713, United States
| | - Xiufen Li
- Texas A&M AgriLife Research Center at Beaumont, Texas A&M University System, Beaumont, Texas 77713, United States
| | - Wenjie Sun
- Department of Atmospheric and Hydrologic Science, St. Cloud State University, St. Cloud, Minnesota 56301, United States
| | - Xingmao Ma
- Zachry Department of Civil and Environmental Engineering, Texas A&M University, College Station, Texas 77843, United States
| |
Collapse
|
3
|
Lima MR, Gomes HT, Cury NF, Pereira LAR, dos Santos Silveira CE. Developing propagation protocols for Justicia lanstyakii Rizz. (Acanthaceae), an ornamental Ni-accumulating subshrub of Brazilian Cerrado. Biologia (Bratisl) 2022. [DOI: 10.1007/s11756-021-00987-4] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/02/2022]
|
4
|
Robin SL, Marchand C, Ham B, Pattier F, Laporte-Magoni C, Serres A. Influences of species and watersheds inputs on trace metal accumulation in mangrove roots. THE SCIENCE OF THE TOTAL ENVIRONMENT 2021; 787:147438. [PMID: 34000538 DOI: 10.1016/j.scitotenv.2021.147438] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/22/2021] [Revised: 04/23/2021] [Accepted: 04/26/2021] [Indexed: 06/12/2023]
Abstract
Mangrove forest is a key ecosystem between land and sea, and provides many services such as trapping sediments and contaminants. These contaminants include trace metals (TM) that can accumulate in mangroves soil and biota. This paper innovates by the comparative study of the effects of the watershed inputs on TM distribution in mangrove soil, on roots bioconcentration factors of two species (Avicennia marina and Rhizophora stylosa), and on Fe plaque formation and immobilization of these TM. Two mangrove forests in New Caledonia were chosen as study sites. One mangrove is located downstream ultramafic rocks and a Ni mine (ultrabasic site), whereas the second mangrove ends a volcano-sedimentary watershed (non-ultrabasic site). TM concentrations (Co, Cr, Cu, Fe, Hg, Mn, Ni, Pb, Zn) were measured in soil, porewaters, and roots of both species via ICP-OES or Hg analyzer. Analyzed TM were significantly more concentrated in soils at the ultrabasic site with Fe, Cr, and Ni the most abundant. Iron, Mn, and Ni were the most concentrated in the roots with mean values of 9,651, 192, and 133 mg kg-1 respectively. However, the bioconcentration factors (BCF) of Fe (0.16) and Ni (0.11) were low due to a lack of ions in the dissolved phase and potential uptake regulation. The uptake of TM by mangrove trees was influenced by concentrations in soil, but more importantly by their potential bioavailability and the physiological characteristics of each species. TM concentrations and BCF were lower for R. stylosa probably due to less permeable root system. A. marina limits TM absorption through Fe plaque formation on its pneumatophores with a capacity to retain TM up to 94% for Mn. Mean Fe plaque formation is potentially correlated to Fe concentration in soil. Eventually, framboids of pyrite were observed within root tissues in the epidermis of A. marina's pneumatophores.
Collapse
Affiliation(s)
- Sarah Louise Robin
- Institut de Sciences Exactes et Appliquées (ISEA EA7484), Université de la Nouvelle-Calédonie, 145 Avenue James Cook, Nouville, BP R4 98851, Nouméa Cedex, New Caledonia.
| | - Cyril Marchand
- Institut de Sciences Exactes et Appliquées (ISEA EA7484), Université de la Nouvelle-Calédonie, 145 Avenue James Cook, Nouville, BP R4 98851, Nouméa Cedex, New Caledonia
| | - Brian Ham
- Institut de Sciences Exactes et Appliquées (ISEA EA7484), Université de la Nouvelle-Calédonie, 145 Avenue James Cook, Nouville, BP R4 98851, Nouméa Cedex, New Caledonia
| | - France Pattier
- Institut de Sciences Exactes et Appliquées (ISEA EA7484), Université de la Nouvelle-Calédonie, 145 Avenue James Cook, Nouville, BP R4 98851, Nouméa Cedex, New Caledonia
| | - Christine Laporte-Magoni
- Institut de Sciences Exactes et Appliquées (ISEA EA7484), Université de la Nouvelle-Calédonie, 145 Avenue James Cook, Nouville, BP R4 98851, Nouméa Cedex, New Caledonia
| | - Arnaud Serres
- Institut de Sciences Exactes et Appliquées (ISEA EA7484), Université de la Nouvelle-Calédonie, 145 Avenue James Cook, Nouville, BP R4 98851, Nouméa Cedex, New Caledonia
| |
Collapse
|
5
|
Nualla-Ong A, Phongdara A, Buapet P. Copper and zinc differentially affect root glutathione accumulation and phytochelatin synthase gene expression of Rhizophora mucronata seedlings: Implications for mechanisms underlying trace metal tolerance. ECOTOXICOLOGY AND ENVIRONMENTAL SAFETY 2020; 205:111175. [PMID: 32836161 DOI: 10.1016/j.ecoenv.2020.111175] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/28/2020] [Revised: 08/06/2020] [Accepted: 08/11/2020] [Indexed: 06/11/2023]
Abstract
Mangroves are susceptible to contamination due to their proximity to shores and human activities. Exposure to excessive trace metals can disturb their physiological functions and may eventually lead to death. Rhizophora mucronata is a common species growing in the mangrove forests of Thailand. Previous studies have shown that seedlings of R. mucronata are tolerant of trace metal and that they accumulate a large metal content in their root tissue. However, knowledge of their tolerance mechanisms is still lacking. To elicit the role of metal detoxification and sequestration by phytochelatins (PC) in the roots of R. mucronata seedlings, the impacts of Cu and Zn exposure were assessed on 1) physiological characteristics 2) the concentration of glutathione (GSH), a precursor of PC and 3) the level of the transcripts encoding phytochelatin synthase (PCS), the key enzyme for PC biosynthesis. Seedlings of R. mucronata were exposed to Cu and Zn in a hydroponic experiment (200 mg Cu or Zn/L in 1/4× Hoagland solution containing 8‰ NaCl, single addition). We found that both trace metals were largely accumulated in the roots. Only Cu-treated seedlings showed a decrease in the photosynthetic efficiency, in line with observed toxicity symptoms (i.e. bent stems and slight wilting of leaves). Metal accumulation, however, did not induce oxidative stress in the roots as indicated by similar level of total reactive species and lipid peroxidation across treatments. The GSH content in the roots exposed to Cu was significantly reduced while no change was observed in Zn-exposed roots. Coordinated semi-quantitative PCR and RT-qPCR revealed pcs down-regulation in Cu-treated roots, whereas Zn-treated roots showed a down-regulation on day 1 and a subsequent recovery on day 5. Failure of detoxification and sequestration of excess Cu due to GSH limitation and down-regulation of pcs may lead to the phytotoxic effects observed in Cu-treated plants. Our results suggest that both GSH and PC play an important role in trace metal tolerance in R. mucronata seedlings.
Collapse
Affiliation(s)
- Aekkaraj Nualla-Ong
- Faculty of Medical Technology, Prince of Songkla University, Thailand; Center for Genomics and Bioinformatics Research, Faculty of Science, Prince of Songkla University, Thailand
| | - Amornrat Phongdara
- Faculty of Medical Technology, Prince of Songkla University, Thailand; Center for Genomics and Bioinformatics Research, Faculty of Science, Prince of Songkla University, Thailand
| | - Pimchanok Buapet
- Plant Physiology Laboratory, Division of Biological Science, Faculty of Science, Prince of Songkla University, Thailand; Coastal Oceanography and Climate Change Research Center, Prince of Songkla University, Thailand.
| |
Collapse
|
6
|
Cheng H, Liu Y, Jiang ZY, Wang YS. Radial oxygen loss is correlated with nitrogen nutrition in mangroves. TREE PHYSIOLOGY 2020; 40:1548-1560. [PMID: 32705132 DOI: 10.1093/treephys/tpaa089] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/16/2019] [Revised: 10/12/2019] [Accepted: 07/06/2020] [Indexed: 06/11/2023]
Abstract
The present study aimed to explore the possible functions of radial oxygen loss (ROL) on mangrove nutrition. A field survey was conducted to explore the relations among ROL, root anatomy and leaf N in different mangrove species along a continuous tidal gradient. Three mangroves with different ROL (Avicennia marina [A. marina], Kandelia obovata and Rhizophora stylosa) were then selected to further explore the dynamics of N at the root-soil interface. The results showed that seaward pioneer mangrove species such as A. marina appeared to exhibit higher leaf N despite growing under poorer nutrient conditions. Greater leaf N in pioneer mangroves coincided with their special root structure (e.g., high porosity together with a thin lignified/suberized exodermis) and powerful ROL. An interesting positive relation was observed between ROL and leaf N in mangroves. Moreover, rhizo-box data further showed that soil nitrification was also strongly correlated with ROL. A. marina, which had the highest ROL among the three mangrove species studied, consistently possessed the highest levels of NO3-, nitrification and ammonia-oxidizing bacteria and archaea gene copies in the rhizosphere. Besides, both NO3- and NH4+ influxes were found to be higher in the roots of A. marina when compared to those of K. obovata and R. stylosa. In summary, greater N acquisition by pioneer mangroves such as A. marina was strongly correlated with ROL which would regulate N transformation and translocation at the root-soil interface. The implications of this study may be significant in mangrove nutrition and the mechanisms involved in mangrove zonation.
Collapse
Affiliation(s)
- Hao Cheng
- State Key Laboratory of Tropical Oceanography and Daya Bay Marina Biology Research Station, South China Sea Institute of Oceanology, Chinese Academy of Sciences, 164th Xingang West Road, Guangzhou 510301, China
| | - Yong Liu
- Ministry of Agriculture Key Laboratory of Mariculture Ecology and Products Quality and Safety, South China Sea Fisheries Research Institute, Chinese Academy of Fishery Sciences, 231th Xingang West Road, Guangzhou 510300, China
| | - Zhao-Yu Jiang
- State Key Laboratory of Tropical Oceanography and Daya Bay Marina Biology Research Station, South China Sea Institute of Oceanology, Chinese Academy of Sciences, 164th Xingang West Road, Guangzhou 510301, China
- College of Life Sciences, Linyi University, middle-region of Shuangling Road, Linyi 276000, China
| | - You-Shao Wang
- State Key Laboratory of Tropical Oceanography and Daya Bay Marina Biology Research Station, South China Sea Institute of Oceanology, Chinese Academy of Sciences, 164th Xingang West Road, Guangzhou 510301, China
| |
Collapse
|
7
|
Abstract
Despite the recognized organic carbon (OC) sequestration potential of mangrove forests, the ongoing climate change and anthropogenic disturbances pose a great threat to these ecosystems. However, we currently lack the ability to mechanically understand and predict the consequences of such impacts, primarily because mechanisms underlying OC stabilization in these ecosystems remain elusive. Research into OC stabilization has focused on terrestrial soils and marine sediments for decades, overlooking the vegetated coastal ecosystems including mangroves. In terrestrial soils and marine sediments, it is widely accepted that OC stabilization is the integrated consequence of OM’s inherent recalcitrance, physical protection, and interactions with minerals and metals. However, related discussion is rarely done in mangrove soils, and recalcitrance of roots and high net ecosystem production (high primary production and low heterotrophic respiration) have been considered as a primary OC sequestration mechanism in mangrove peat and mineral soils, respectively. This review presents the available information on the mechanisms underlying OC stabilization in mangrove soils and highlights research questions that warrant further investigation. Primary OC stabilization mechanisms differ between mangrove peat and mineral soils. In mangrove mineral soils, physico-chemical stabilization processes are important, yet grossly understudied OC stabilization mechanisms. In mangrove peat, recalcitrance of mangrove roots and the inhibition of phenoloxidase under the anoxic condition may be the primary OC stabilization mechanisms. Salinity-induced OC immobilization likely plays a role in both type of soils. Finally, this review argues that belowground production and allochthonous inputs in mangrove forests are likely underestimated. More studies are needed to constrain C budgets to explain the enigma that mangrove OC keeps accumulating despite much higher decomposition (especially by large lateral exports) than previously considered.
Collapse
|
8
|
Qi X, Tam NFY, Li WC, Ye Z. The role of root apoplastic barriers in cadmium translocation and accumulation in cultivars of rice (Oryza sativa L.) with different Cd-accumulating characteristics. ENVIRONMENTAL POLLUTION (BARKING, ESSEX : 1987) 2020; 264:114736. [PMID: 32417578 DOI: 10.1016/j.envpol.2020.114736] [Citation(s) in RCA: 38] [Impact Index Per Article: 9.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/12/2019] [Revised: 04/20/2020] [Accepted: 05/03/2020] [Indexed: 05/25/2023]
Abstract
The radial translocation of cadmium (Cd) from the root to the shoot is one of the major processes affecting Cd accumulation in rice (Oryza sativa L.) grains, but few studies have focused on Cd apoplastic transport in rice. The aim of this study was to determine how apoplastic barriers affect Cd translocation via the apoplastic pathway, Cd accumulation levels in upper parts (shoot and grains) of rice cultivars, and the possible mechanism involved. Hydroponic and soil pot trials were conducted to study the development and chemical constituents of apoplastic barriers and their permeability to bypass flow, and to determine Cd localization in the roots of rice cultivars with different Cd-accumulating characteristics. The Cd accumulation in upper parts was positively correlated with bypass flow in the root and the apparent Cd concentration in the xylem, indicating that the apoplastic pathway may play an important role in Cd root-shoot translocation in rice. Apoplastic barriers were deposited closer to the root tip and were thicker in low Cd-accumulating cultivars than in high Cd-accumulating cultivars. The amounts and rates of increase in lignin and suberin were significantly higher in ZD14 (a low Cd-accumulating cultivar) than in FYXZ (a high Cd-accumulating cultivar) under Cd stress, indicating that stronger barriers were induced by Cd in ZD14. The stronger and earlier formation of barriers in the low Cd-accumulating cultivar decreased bypass flow more efficiently, so that more Cd was retained in the root during apoplastic translocation. This was confirmed by localization analyses of Cd in root transverse sections. These results suggest that apoplastic barriers reduce Cd root-to-shoot translocation via the apoplastic pathway, leading to lower Cd accumulation in the upper parts of rice plants. Bypass flow may have the potential to be used as a rapid screening indicator for low Cd-accumulating rice cultivars.
Collapse
Affiliation(s)
- Xiaoli Qi
- School of Life Sciences, Sun Yat-sen University, Guangzhou, 510006, China
| | - Nora Fung-Yee Tam
- Department of Chemistry, City University of Hong Kong, Kowloon, Hong Kong, China
| | - Wai Chin Li
- Department of Science and Environmental Studies, The Education University of Hong Kong, Hong Kong, China
| | - Zhihong Ye
- School of Life Sciences, Sun Yat-sen University, Guangzhou, 510006, China.
| |
Collapse
|
9
|
Cheng H, Inyang A, Li CD, Fei J, Zhou YW, Wang YS. Salt tolerance and exclusion in the mangrove plant Avicennia marina in relation to root apoplastic barriers. ECOTOXICOLOGY (LONDON, ENGLAND) 2020; 29:676-683. [PMID: 32291617 DOI: 10.1007/s10646-020-02203-6] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Accepted: 03/23/2020] [Indexed: 06/11/2023]
Abstract
Salt tolerance and the possible functions of suberization on salt exclusion and secretion were examined in a dominant mangrove plant, Avicennia marina. The results showed that low salinities (10‰ and 20‰) almost has no negative effect on A. marina, however significant growth inhibitions were observed in the seedlings grown in higher salinities (30‰ and 40‰). With the increases of salinity, increased tissue Na+ content and enhanced salt secretion by glands were observed. Obvious suberization thickening were detected both in the exodermis and endodermis of the roots after salt pretreatment when compared to the roots without salt treatment. More importantly, the present data further confirmed that these root apoplastic barriers would directly decrease Na+ loading into xylem. Higher salt tolerance was observed in the seedlings pre-cultivated by salty tide when compared to fresh water cultivated A. marina. In summary, this study suggests a barrier property of suberization in dealing with salt exclusion in mangroves, a moderate salt pre-treatment may benefit plant withstanding high salinity.
Collapse
Affiliation(s)
- Hao Cheng
- State Key Laboratory of Tropical Oceanography, South China Sea Institute of Oceanology, Chinese Academy of Sciences, Guangzhou, 510301, China
- Daya Bay Marine Biology Research Station, Chinese Academy of Sciences, Shenzhen, 518121, China
| | - Anifiok Inyang
- State Key Laboratory of Tropical Oceanography, South China Sea Institute of Oceanology, Chinese Academy of Sciences, Guangzhou, 510301, China
- Innovation Academy of South China Sea Ecology and Environmental Engineering, Chinese Academy of Sciences, Guangzhou, 510301, China
| | - Chang-Da Li
- Marine and fisheries Development Research Center, Dongtou District, Wenzhou, 325009, China
| | - Jiao Fei
- State Key Laboratory of Tropical Oceanography, South China Sea Institute of Oceanology, Chinese Academy of Sciences, Guangzhou, 510301, China
- Daya Bay Marine Biology Research Station, Chinese Academy of Sciences, Shenzhen, 518121, China
| | - Yan-Wu Zhou
- State Key Laboratory of Tropical Oceanography, South China Sea Institute of Oceanology, Chinese Academy of Sciences, Guangzhou, 510301, China
| | - You-Shao Wang
- State Key Laboratory of Tropical Oceanography, South China Sea Institute of Oceanology, Chinese Academy of Sciences, Guangzhou, 510301, China.
- Daya Bay Marine Biology Research Station, Chinese Academy of Sciences, Shenzhen, 518121, China.
- Innovation Academy of South China Sea Ecology and Environmental Engineering, Chinese Academy of Sciences, Guangzhou, 510301, China.
| |
Collapse
|
10
|
Cheng H, Wang YS, Li CD, Ye ZH, Muhammad S, Wu ML, Sun FL. Mixture of Pb, Zn and Cu on root permeability and radial oxygen loss in the mangrove Bruguiera gymnorrhiza. ECOTOXICOLOGY (LONDON, ENGLAND) 2020; 29:691-697. [PMID: 32472470 DOI: 10.1007/s10646-020-02234-z] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Accepted: 05/13/2020] [Indexed: 06/11/2023]
Abstract
A short term pot trail was employed to evaluate the exposure of mixed heavy metals (Cu, Pb and Zn) on growth, radial oxygen loss (ROL) and root anatomy in Bruguiera gymnorrhiza. The possible function of BgC4H, a cytochrome P450 gene, on root lignification was also discussed. The exposures of mixed Cu, Pb and Zn directly reduce O2 leakage at root surface. The reduced ROL inhibited by heavy metals was mainly ascribed by the changes in root anatomical features, such as decreased root porosity together with increased lignification within the exodermis. BgC4H was found to be up-regulated after 0.5-day metal exposure, and remained higher transcript levels within 3-day metal exposure when compared to control roots. Besides, the inhibited photosynthesis may also result in less oxygen can be transported to the underground roots. In summary, the mangrove B. gymnorrhiza appeared to react to external mixed metal contaminants by developing a lignified and impermeable exodermis, and such a root barrier induced by mixed Cu, Pb and Zn appeared to be an adaptive response to block metal ions enters into the roots.
Collapse
Affiliation(s)
- Hao Cheng
- State Key Laboratory of Tropical Oceanography, South China Sea Institute of Oceanology, Chinese Academy of Sciences, Guangzhou, 510301, China
- Daya Bay Marine Biology Research Station, Chinese Academy of Sciences, Shenzhen, 518121, China
- Innovation Academy of South China Sea Ecology and Environmental Engineering, Chinese Academy of Sciences, Guangzhou, 510301, China
| | - You-Shao Wang
- State Key Laboratory of Tropical Oceanography, South China Sea Institute of Oceanology, Chinese Academy of Sciences, Guangzhou, 510301, China.
- Daya Bay Marine Biology Research Station, Chinese Academy of Sciences, Shenzhen, 518121, China.
- Innovation Academy of South China Sea Ecology and Environmental Engineering, Chinese Academy of Sciences, Guangzhou, 510301, China.
| | - Chang-Da Li
- Marine and fisheries Development Research Center, Dongtou District, Wenzhou, 325009, China
| | - Zhi-Hong Ye
- State Key Laboratory for Bio-control, School of Life Sciences, Sun Yat-sen University, Guangzhou, 510006, China
| | - Shafi Muhammad
- State Key Laboratory of Tropical Oceanography, South China Sea Institute of Oceanology, Chinese Academy of Sciences, Guangzhou, 510301, China
| | - Mei-Lin Wu
- State Key Laboratory of Tropical Oceanography, South China Sea Institute of Oceanology, Chinese Academy of Sciences, Guangzhou, 510301, China
- Innovation Academy of South China Sea Ecology and Environmental Engineering, Chinese Academy of Sciences, Guangzhou, 510301, China
| | - Fun-Lin Sun
- State Key Laboratory of Tropical Oceanography, South China Sea Institute of Oceanology, Chinese Academy of Sciences, Guangzhou, 510301, China
- Daya Bay Marine Biology Research Station, Chinese Academy of Sciences, Shenzhen, 518121, China
- Innovation Academy of South China Sea Ecology and Environmental Engineering, Chinese Academy of Sciences, Guangzhou, 510301, China
| |
Collapse
|
11
|
Cheng H, Jiang ZY, Ma XX, Wang YS. Nitrogen dynamics in the mangrove sediments affected by crabs in the intertidal regions. ECOTOXICOLOGY (LONDON, ENGLAND) 2020; 29:669-675. [PMID: 32333253 DOI: 10.1007/s10646-020-02212-5] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Accepted: 04/01/2020] [Indexed: 06/11/2023]
Abstract
Crab is an important benthonic animal in mangrove ecosystem, however, the potential function of crabs on nitrogen (N) transformation in mangrove ecosystems is still poorly understood. The present study aimed to explore the potential effect of crab burrows on nitrification/denitrification within the sediments. The results showed that the presence of crab burrows could directly promote soil nitrification, the regions within more crab burrows appeared to possess higher nitrification. Higher AOA and AOB gene copies were also observed in the sediments surrounding crab burrows than those in the sediments without crab burrow. On the contrary, lower nirS copies, a denitrification related gene, were detected in the sediments surrounding crab burrows. In summary, the present study proposed new evidences of nitrification enhancement deriving by crabs, the presence of crabs might be significant in alleviating nitrification inhibition and benefits the growth of mangroves under tidal flooding.
Collapse
Affiliation(s)
- Hao Cheng
- State Key Laboratory of Tropical Oceanography, South China Sea Institute of Oceanology, Chinese Academy of Sciences, Guangzhou, 510301, China
- Daya Bay Marine Biology Research Station, Chinese Academy of Sciences, Shenzhen, 518121, China
- Innovation Academy of South China Sea Ecology and Environmental Engineering, Chinese Academy of Sciences, Guangzhou, 510301, China
| | - Zhao-Yu Jiang
- State Key Laboratory of Tropical Oceanography, South China Sea Institute of Oceanology, Chinese Academy of Sciences, Guangzhou, 510301, China
- Innovation Academy of South China Sea Ecology and Environmental Engineering, Chinese Academy of Sciences, Guangzhou, 510301, China
| | - Xiao-Xia Ma
- State Key Laboratory of Tropical Oceanography, South China Sea Institute of Oceanology, Chinese Academy of Sciences, Guangzhou, 510301, China
- School of Life Sciences, Jinan University, Guangzhou, 510632, China
| | - You-Shao Wang
- State Key Laboratory of Tropical Oceanography, South China Sea Institute of Oceanology, Chinese Academy of Sciences, Guangzhou, 510301, China.
- Daya Bay Marine Biology Research Station, Chinese Academy of Sciences, Shenzhen, 518121, China.
- Innovation Academy of South China Sea Ecology and Environmental Engineering, Chinese Academy of Sciences, Guangzhou, 510301, China.
| |
Collapse
|
12
|
Cheng H, Wu ML, Li CD, Sun FL, Sun CC, Wang YS. Dynamics of radial oxygen loss in mangroves subjected to waterlogging. ECOTOXICOLOGY (LONDON, ENGLAND) 2020; 29:684-690. [PMID: 32394359 DOI: 10.1007/s10646-020-02221-4] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Accepted: 04/25/2020] [Indexed: 06/11/2023]
Abstract
Tidal flooding can directly result in oxygen (O2) shortage, however the functions of root aeration in flooding tolerance and O2 dynamics within mangroves are still poorly understood. Thus, in this study, the correlations among waterlogging tolerance, root porosity and O2 movement within the plants were investigated using two mangrove species (Aegiceras corniculatum and Bruguiera gymnorrhiza) and a semi-mangrove Heritiera littoralis. Based on the present data, the species A. corniculatum and B. gymnorrhiza, which possessed higher root porosity, exhibited higher waterlogging tolerance, while H. littoralis is intolerant. Increased root porosity, leaf stoma, and total ROL were observed in the roots of A. corniculatum and B. gymnorrhiza growing in stagnant solution when compared to respective aerated controls. As for ROL spatial pattern along roots, external anaerobic condition could promote ROL from apical root regions but reduce ROL from basal roots, leading to a 'tighter barrier'. In summary, the present study indicated that the plants (e.g., A. corniculatum and B. gymnorrhiza) prioritized to ensure O2 diffusion towards root tips under waterlogging by increasing aerenchyma formation and reducing O2 leakage at basal root regions.
Collapse
Affiliation(s)
- Hao Cheng
- State Key Laboratory of Tropical Oceanography, South China Sea Institute of Oceanology, Chinese Academy of Sciences, Guangzhou, 510301, China
- Daya Bay Marine Biology Research Station, Chinese Academy of Sciences, Shenzhen, 518121, China
| | - Mei-Lin Wu
- State Key Laboratory of Tropical Oceanography, South China Sea Institute of Oceanology, Chinese Academy of Sciences, Guangzhou, 510301, China
- Daya Bay Marine Biology Research Station, Chinese Academy of Sciences, Shenzhen, 518121, China
| | - Chang-Da Li
- Innovation Academy of South China Sea Ecology and Environmental Engineering, Chinese Academy of Sciences, Guangzhou, 510301, China
| | - Fu-Lin Sun
- State Key Laboratory of Tropical Oceanography, South China Sea Institute of Oceanology, Chinese Academy of Sciences, Guangzhou, 510301, China
- Daya Bay Marine Biology Research Station, Chinese Academy of Sciences, Shenzhen, 518121, China
- Marine and fisheries Development Research Center, Dongtou District, Wenzhou, 325009, China
| | - Cui-Ci Sun
- State Key Laboratory of Tropical Oceanography, South China Sea Institute of Oceanology, Chinese Academy of Sciences, Guangzhou, 510301, China
- Daya Bay Marine Biology Research Station, Chinese Academy of Sciences, Shenzhen, 518121, China
- Marine and fisheries Development Research Center, Dongtou District, Wenzhou, 325009, China
| | - You-Shao Wang
- State Key Laboratory of Tropical Oceanography, South China Sea Institute of Oceanology, Chinese Academy of Sciences, Guangzhou, 510301, China.
- Daya Bay Marine Biology Research Station, Chinese Academy of Sciences, Shenzhen, 518121, China.
- Marine and fisheries Development Research Center, Dongtou District, Wenzhou, 325009, China.
| |
Collapse
|
13
|
Bourgeois C, Alfaro AC, Bisson E, Alcius S, Marchand C. Trace metal dynamics in soils and plants along intertidal gradients in semi-arid mangroves (New Caledonia). MARINE POLLUTION BULLETIN 2020; 156:111274. [PMID: 32510413 DOI: 10.1016/j.marpolbul.2020.111274] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/01/2020] [Revised: 05/05/2020] [Accepted: 05/11/2020] [Indexed: 06/11/2023]
Abstract
Trace metal dynamics were investigated in mangroves developing in semi-arid New Caledonia, where Avicennia and Rhizophora stands grow in the upper and lower intertidal zone, respectively. We collected soil samples and mangrove tissues in an undisturbed site, a mining-influenced site and in a mining and aquaculture-influenced site. Differences in duration of immersion and organic matter (OM) cycling resulted in a sharp decrease of metal concentrations in soils and plants from landside to seaside. Both species were tolerant to metals mainly via exclusion, (i.e. metal bioaccumulation restricted to roots and leaf litter). Strong correlations (p < 0.05) were found between Na and Fe, Mn, Cu and Zn in green and senesced leaves of Avicennia marina, indicating a possible role of those metals in mechanisms to cope with hypersaline conditions. Increasing metal pollution, aridity and sea-level rise are likely to result in a decrease in mangrove efficiency in filtering trace metals seaward.
Collapse
Affiliation(s)
- Carine Bourgeois
- Auckland University of Technology (AUT): Institute for Applied Ecology New Zealand, School of Science, Faculty of Health and Environmental Sciences, Private Bag 92006, Auckland 1142, New Zealand; IMPMC, Institut de Recherche pour le Développement (IRD), UPMC, CNRS, MNHN, Noumea, New Caledonia, France
| | - Andrea C Alfaro
- Auckland University of Technology (AUT): Institute for Applied Ecology New Zealand, School of Science, Faculty of Health and Environmental Sciences, Private Bag 92006, Auckland 1142, New Zealand.
| | - Estelle Bisson
- IMPMC, Institut de Recherche pour le Développement (IRD), UPMC, CNRS, MNHN, Noumea, New Caledonia, France
| | - Steevensen Alcius
- IMPMC, Institut de Recherche pour le Développement (IRD), UPMC, CNRS, MNHN, Noumea, New Caledonia, France
| | - Cyril Marchand
- IMPMC, Institut de Recherche pour le Développement (IRD), UPMC, CNRS, MNHN, Noumea, New Caledonia, France; ISEA, University of New Caledonia BP R4, 98851 Noumea, New Caledonia
| |
Collapse
|
14
|
Zhang P, Li Q, Zhang C. Root adaptation in Echinodorus osiris Rataj plant under cadmium stress. INTERNATIONAL JOURNAL OF PHYTOREMEDIATION 2019; 22:534-539. [PMID: 31718242 DOI: 10.1080/15226514.2019.1686605] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/10/2023]
Abstract
Cadmium tolerant plant, Echinodorus osiris Rataj, was selected to study its root adaptive mechanism under Cd stress. The change of root porosity, radial oxygen loss (ROL), and iron plaque formation was investigated. Results suggested that Cd treatment decreased 28.6-49.9% of ROL and reduced 13.5-23.3% of root porosity but increased 63.4-147.2% of iron plaque after 21 days, respectively. Under different Cd treatments, the uptake of Cd in root presented quick and mild models while it showed relatively consistent increase in shoot. Correlation analysis demonstrated that Cd concentrations in plant were related negatively with root porosity but had no significant correlation with ROL. There was significant positive correlation between root porosity and ROL; however, they both related negatively with root iron plaque. Moreover, the scanning electron microscopy indicates a barrier to the movement of Cd in endodermis layers.
Collapse
Affiliation(s)
- Peng Zhang
- Guangdong Provincial Academy of Environmental Science, Guangzhou, P.R. China
| | - Qinfeng Li
- Liuzhou Agricultural Technology Extension Center, Liuzhou, P.R. China
| | - Chaolan Zhang
- School of Resource, Environment and Materials, Guangxi University, Nanning, P.R. China
| |
Collapse
|
15
|
Torasa S, Boonyarat P, Phongdara A, Buapet P. Tolerance Mechanisms to Copper and Zinc Excess in Rhizophora mucronata Lam. Seedlings Involve Cell Wall Sequestration and Limited Translocation. BULLETIN OF ENVIRONMENTAL CONTAMINATION AND TOXICOLOGY 2019; 102:573-580. [PMID: 30868179 DOI: 10.1007/s00128-019-02589-y] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/11/2018] [Accepted: 03/06/2019] [Indexed: 06/09/2023]
Abstract
Rhizophora mucronata is a common mangrove growing in habitats subjected to heavy metal (HM) contamination. Understanding their physiological responses to copper (Cu) and zinc (Zn) excess and underlying tolerance mechanisms is crucial to assess impacts of metal pollution on mangrove community. Seedlings were treated with Cu or Zn (0, 50 or 100 mg per plant) by means of a single addition. At day 3 and 7, Cu and Zn accumulation, photosynthetic efficiency, superoxide dismutase and peroxidase activity, non-protein thiols, reactive oxygen species and lipid peroxidation in roots and leaves were measured. R. mucronata restricted Cu and Zn translocation, thus accumulated HM mainly in roots while kept the leaves unaffected. However, high root HM did not induce oxidative stress nor anti-oxidative defense as HM were largely deposited in cell wall. We concluded that HM tolerance strategies of R. mucronata seedlings are exclusion and restriction of translocation to the vital photosynthetic tissue.
Collapse
Affiliation(s)
- Supakson Torasa
- Plant Physiology Laboratory, Department of Biology, Faculty of Science, Prince of Songkla University, Songkhla, 90110, Thailand
- Coastal Oceanography and Climate Change Research Center, Prince of Songkla University, Songkhla, 90110, Thailand
| | - Pimpakan Boonyarat
- Plant Physiology Laboratory, Department of Biology, Faculty of Science, Prince of Songkla University, Songkhla, 90110, Thailand
| | - Amornrat Phongdara
- Center for Genomics and Bioinformatics Research, Faculty of Science, Prince of Songkla University, Songkhla, 90112, Thailand
| | - Pimchanok Buapet
- Plant Physiology Laboratory, Department of Biology, Faculty of Science, Prince of Songkla University, Songkhla, 90110, Thailand.
- Coastal Oceanography and Climate Change Research Center, Prince of Songkla University, Songkhla, 90110, Thailand.
| |
Collapse
|
16
|
Ejiri M, Shiono K. Prevention of Radial Oxygen Loss Is Associated With Exodermal Suberin Along Adventitious Roots of Annual Wild Species of Echinochloa. FRONTIERS IN PLANT SCIENCE 2019; 10:254. [PMID: 30915090 PMCID: PMC6421306 DOI: 10.3389/fpls.2019.00254] [Citation(s) in RCA: 19] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/31/2018] [Accepted: 02/18/2019] [Indexed: 05/08/2023]
Abstract
Internal aeration is crucial for root growth under waterlogged conditions. Some wetland plants have a structural barrier that impedes oxygen leakage from the basal part of roots called a radial oxygen loss (ROL) barrier. The ROL barrier reduces loss of oxygen transported via the aerenchyma to the root tips, enabling root growth into anoxic soil. The roots of some plants develop an ROL barrier under waterlogged conditions, while they remain leaky to oxygen under well-drained or aerated conditions. The main components of the inducible ROL barrier are thought to be suberin and lignin deposited at the outer cellular space (apoplast) in the outer part of roots. On the other hand, a few wetland plants including a species of Echinochloa form a constitutive ROL barrier, i.e., it is formed even in the absence of waterlogging. However, little is known about the components of constitutive ROL barriers. An ROL barrier is considered to be a characteristic of wetland species because it has not been found in any non-wetland species so far. Here, we examined whether Echinochloa species from non-waterlogged fields also form an inducible or constitutive ROL barrier. We found that three species of Echinochloa from non-waterlogged fields constitutively developed an ROL barrier under aerated conditions. Over 85% of their root exodermis cells were covered with suberin lamellae and had well-developed Casparian strips. These substances inhibited the infiltration of an apoplastic tracer (periodic acid), suggesting that the ROL barrier can also prevent the entry of phytotoxic compounds from the soil. Unlike the other Echinochloa species, E. oryzicola, which mainly inhabits rice paddies, was found to lack a constitutive ROL barrier under aerated conditions. Although close to 90% of its sclerenchyma was well lignified, it leaked oxygen from the basal part of roots. A high percentage (55%) of the root exodermis cells were not fortified with suberin lamellae. These results suggest that suberin is an important component of constitutive ROL barriers.
Collapse
Affiliation(s)
| | - Katsuhiro Shiono
- Laboratory of Plant Ecophysiology, Graduate School of Bioscience and Biotechnology, Fukui Prefectural University, Eiheiji, Japan
| |
Collapse
|
17
|
Quadros AF, Zimmer M. Dataset of "true mangroves" plant species traits. Biodivers Data J 2018:e22089. [PMID: 29362554 PMCID: PMC5769720 DOI: 10.3897/bdj.5.e22089] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/06/2017] [Accepted: 11/29/2017] [Indexed: 12/02/2022] Open
Abstract
Background Plant traits have been used extensively in ecology. They can be used as proxies for resource-acquisition strategies and facilitate the understanding of community structure and ecosystem functioning. However, many reviews and comparative analysis of plant traits do not include mangroves plants, possibly due to the lack of quantitative information available in a centralised form. New information Here a dataset is presented with 2364 records of traits of "true mangroves" species, gathered from 88 references (published articles, books, theses and dissertations). The dataset contains information on 107 quantitative traits and 18 qualitative traits for 55 species of "true mangroves" (sensuTomlinson 2016). Most traits refer to components of living trees (mainly leaves), but litter traits were also included.
Collapse
Affiliation(s)
| | - Martin Zimmer
- Leibniz Centre for Tropical Marine Research, Bremen, Germany
| |
Collapse
|
18
|
Arreghini S, de Cabo L, Serafini R, de Iorio AF. Effect of the combined addition of Zn and Pb on partitioning in sediments and their accumulation by the emergent macrophyte Schoenoplectus californicus. ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH INTERNATIONAL 2017; 24:8098-8107. [PMID: 28144860 DOI: 10.1007/s11356-017-8478-7] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/05/2016] [Accepted: 01/18/2017] [Indexed: 06/06/2023]
Abstract
Wetlands usually provide a natural mechanism that diminishes the transport of toxic compounds to other compartments of the ecosystem by immobilization and accumulation in belowground tissues and/or soil. This study was conducted to assess the ability of Schoenoplectus californicus growing in natural marsh sediments, with zinc and lead addition, to tolerate and accumulate these metals, taking account of the metal distribution in the sediment fractions. The Zn and Pb were mainly found in available (exchangeable) and potentially available (bound to organic matter) forms, respectively. The absorption of Zn and Pb by plants increased in sediments with added metals. Both metals were largely retained in roots (translocation factor < 1). Lead rhizome concentrations only increased significantly in treatments with high doses of metal independently of added Zn. The addition of Zn increased its concentration in roots and shoots significantly, while its concentration in rhizomes only increased when both metals were added together. Zinc concentration in shoots did not reach the toxic level for plants. Zinc and Pb concentrations in roots were high, but they were not sufficient to reduce biomass growth.
Collapse
Affiliation(s)
- Silvana Arreghini
- Universidad de Buenos Aires, Facultad de Agronomía, Cátedra de Química Analítica, Av. San Martín 4453, C1417DSE, Buenos Aires, Argentina.
| | - Laura de Cabo
- CONICET-Museo Argentino de Ciencias Naturales "Bernardino Rivadavia", Av. A. Gallardo 470, C1405DJR, Buenos Aires, Argentina
| | - Roberto Serafini
- Universidad de Buenos Aires, Facultad de Agronomía, Cátedra de Química Analítica, Av. San Martín 4453, C1417DSE, Buenos Aires, Argentina
| | - Alicia Fabrizio de Iorio
- Universidad de Buenos Aires, Facultad de Agronomía, Cátedra de Química Analítica, Av. San Martín 4453, C1417DSE, Buenos Aires, Argentina
| |
Collapse
|
19
|
Arrivabene HP, Campos CQ, Souza IDC, Wunderlin DA, Milanez CRD, Machado SR. Differential bioaccumulation and translocation patterns in three mangrove plants experimentally exposed to iron. Consequences for environmental sensing. ENVIRONMENTAL POLLUTION (BARKING, ESSEX : 1987) 2016; 215:302-313. [PMID: 27213571 DOI: 10.1016/j.envpol.2016.05.019] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/15/2015] [Revised: 04/13/2016] [Accepted: 05/03/2016] [Indexed: 06/05/2023]
Abstract
Avicennia schaueriana, Laguncularia racemosa and Rhizophora mangle were experimentally exposed to increasing levels of iron (0, 10, 20 and 100 mg L(-1) added Fe(II) in Hoagland's nutritive medium). The uptake and translocation of iron from roots to stems and leaves, Fe-secretion through salt glands (Avicennia schaueriana and Laguncularia racemosa) as well as anatomical and histochemical changes in plant tissues were evaluated. The main goal of this work was to assess the diverse capacity of these plants to detect mangroves at risk in an area affected by iron pollution (Vitoria, Espírito Santo, Brazil). Results show that plants have differential patterns with respect to bioaccumulation, translocation and secretion of iron through salt glands. L. racemosa showed the best environmental sensing capacity since the bioaccumulation of iron in both Fe-plaque and roots was higher and increased as the amount of added-iron rose. Fewer changes in translocation factors throughout increasing added-iron were observed in this species. Furthermore, the amount of iron secreted through salt glands of L. racemosa was strongly inhibited when exposed to added-iron. Among three studied species, A. schaueriana showed the highest levels of iron in stems and leaves. On the other hand, Rhizophora mangle presented low values of iron in these compartments. Even so, there was a significant drop in the translocation factor between aerial parts with respect to roots, since the bioaccumulation in plaque and roots of R. mangle increased as iron concentration rose. Moreover, rhizophores of R. mangle did not show changes in bioaccumulation throughout the studied concentrations. So far, we propose L. racemosa as the best species for monitoring iron pollution in affected mangroves areas. To our knowledge, this is the first detailed report on the response of these plants to increasing iron concentration under controlled conditions, complementing existing data on the behavior of the same plants under field exposure.
Collapse
Affiliation(s)
- Hiulana Pereira Arrivabene
- Universidade Estadual Paulista "Júlio de Mesquita Filho" - UNESP, Instituto de Biociências de Botucatu, Departamento de Botânica, 18618-970, P.O. Box 510, Botucatu, São Paulo, Brazil
| | - Caroline Quenupe Campos
- Universidade Federal do Espírito Santo, Centro de Ciências Humanas e Naturais, Departamento de Ciências Biológicas, 29075-910, Vitória, Espírito Santo, Brazil
| | - Iara da Costa Souza
- Universidade Federal de São Carlos, Centro de Ciências Biológicas e da Saúde, Departamento de Ciências Fisiológicas, 13565-905, São Carlos, São Paulo, Brazil
| | - Daniel Alberto Wunderlin
- ICYTAC, Instituto de Ciencia y Tecnología de Alimentos Córdoba, CONICET and Dpto. Qca. Orgánica, Fac. Cs. Químicas, Universidad Nacional de Córdoba, Ciudad Universitaria, 5000, Córdoba, Argentina.
| | - Camilla Rozindo Dias Milanez
- Universidade Federal do Espírito Santo, Centro de Ciências Humanas e Naturais, Departamento de Ciências Biológicas, 29075-910, Vitória, Espírito Santo, Brazil
| | - Silvia Rodrigues Machado
- Universidade Estadual Paulista "Júlio de Mesquita Filho" - UNESP, Instituto de Biociências de Botucatu, Departamento de Botânica, 18618-970, P.O. Box 510, Botucatu, São Paulo, Brazil.
| |
Collapse
|
20
|
Effects of silicon on growth, root anatomy, radial oxygen loss (ROL) and Fe/Mn plaque of Aegiceras corniculatum (L.) Blanco seedlings exposed to cadmium. ACTA ACUST UNITED AC 2015. [DOI: 10.1016/j.enmm.2015.04.001] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
|
21
|
Cheng H, Wang YS, Fei J, Jiang ZY, Ye ZH. Differences in root aeration, iron plaque formation and waterlogging tolerance in six mangroves along a continues tidal gradient. ECOTOXICOLOGY (LONDON, ENGLAND) 2015; 24:1659-1667. [PMID: 25956983 DOI: 10.1007/s10646-015-1474-0] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Accepted: 04/28/2015] [Indexed: 06/04/2023]
Abstract
Mangrove is a special coastal forest along tropical and subtropical intertidal shores. However, how mangroves adapt to tidal flooding and the mechanisms involved in mangrove zonation are still poorly understood. In this study, a pot trial with different tide treatments was conducted to investigate the differences in root anatomy, porosity, radial oxygen loss, iron plaque formation and waterlogging tolerance among six mangroves along a continuous tidal gradient. The index of waterlogging tolerance illustrated that Sonneratia apetala possessed the highest index, followed by Aeguceras corniculatum/Kandelia, Rhizophora stylosa, Heritiera littorlis and Thespesia populnea. Waterlogging tolerances of the mangroves were found to be positively correlated with their root porosity, radial oxygen loss and iron plaque formation. Waterlogging-sensitive species such as landward semi-mangroves exhibited small root porosity and ROL, while waterlogging-tolerant species such as seaward pioneer and rhizophoraceous mangroves exhibited extensive porosity, ROL and iron plaque formation. Nevertheless, grater root porosity and iron plaque formation were detected in permanent waterlogged plants when compared to drained plants. In conclusion, The present study proposes a structural adaptive strategy to tidal flooding in mangroves, such that the mangroves with higher root porosity, ROL and iron plaque appeared to exhibit higher waterlogging tolerance and adaptability in anaerobic foreshores.
Collapse
Affiliation(s)
- Hao Cheng
- State Key Laboratory of Tropical Oceanography and Daya Bay Marine Biology Research Station, South China Sea Institute of Oceanology, Chinese Academy of Sciences, Guangzhou, 510301, China
| | - You-Shao Wang
- State Key Laboratory of Tropical Oceanography and Daya Bay Marine Biology Research Station, South China Sea Institute of Oceanology, Chinese Academy of Sciences, Guangzhou, 510301, China.
| | - Jiao Fei
- State Key Laboratory of Tropical Oceanography and Daya Bay Marine Biology Research Station, South China Sea Institute of Oceanology, Chinese Academy of Sciences, Guangzhou, 510301, China
| | - Zhao-Yu Jiang
- State Key Laboratory of Tropical Oceanography and Daya Bay Marine Biology Research Station, South China Sea Institute of Oceanology, Chinese Academy of Sciences, Guangzhou, 510301, China
| | - Zhi-Hong Ye
- State Key Laboratory for Bio-control, School of Life Sciences, Sun Yat-sen University, Guangzhou, 510006, China
| |
Collapse
|
22
|
Shabala S, Shabala L, Barcelo J, Poschenrieder C. Membrane transporters mediating root signalling and adaptive responses to oxygen deprivation and soil flooding. PLANT, CELL & ENVIRONMENT 2014; 37:2216-33. [PMID: 24689809 DOI: 10.1111/pce.12339] [Citation(s) in RCA: 51] [Impact Index Per Article: 5.1] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/14/2013] [Revised: 03/24/2014] [Accepted: 03/25/2014] [Indexed: 05/20/2023]
Abstract
This review provides a comprehensive assessment of a previously unexplored topic: elucidating the role that plasma- and organelle-based membrane transporters play in plant-adaptive responses to flooding. We show that energy availability and metabolic shifts under hypoxia and anoxia are critical in regulating membrane-transport activity. We illustrate the high tissue and time dependence of this regulation, reveal the molecular identity of transporters involved and discuss the modes of their regulation. We show that both reduced oxygen availability and accumulation of transition metals in flooded roots result in a reduction in the cytosolic K(+) pool, ultimately determining the cell's fate and transition to programmed cell death (PCD). This process can be strongly affected by hypoxia-induced changes in the amino acid pool profile and, specifically, ϒ-amino butyric acid (GABA) accumulation. It is suggested that GABA plays an important regulatory role, allowing plants to proceed with H2 O2 signalling to activate a cascade of genes that mediate plant adaptation to flooding while at the same time, preventing the cell from entering a 'suicide program'. We conclude that progress in crop breeding for flooding tolerance can only be achieved by pyramiding the numerous physiological traits that confer efficient energy maintenance, cytosolic ion homeostasis, and reactive oxygen species (ROS) control and detoxification.
Collapse
Affiliation(s)
- Sergey Shabala
- School of Land and Food, University of Tasmania, Hobart, TAS 7001, Australia
| | | | | | | |
Collapse
|
23
|
Mongon J, Konnerup D, Colmer TD, Rerkasem B. Responses of rice to Fe 2+ in aerated and stagnant conditions: growth, root porosity and radial oxygen loss barrier. FUNCTIONAL PLANT BIOLOGY : FPB 2014; 41:922-929. [PMID: 32481045 DOI: 10.1071/fp13359] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/18/2013] [Accepted: 03/08/2014] [Indexed: 05/25/2023]
Abstract
Lowland rice (Oryza sativa L.) encounters flooded soils that are anaerobic and chemically reduced. Exposure of the roots to high soil Fe2+ concentrations can result in toxicity. Internal aeration delivering O2 to submerged roots via the aerenchyma is well understood, but the effect of Fe2+ on O2 transport in roots is less studied. We aimed to evaluate the effects of Fe2+ on growth and root aeration. O. sativa var. Amaroo was grown in aerobic and deoxygenated solutions with 0mM, 0.18mM, 0.36mM, 0.54mM or 0.72mM Fe2+ using FeSO4.7H2O and a control with 0.05mM Fe-EDTA. The treatments were imposed on 14-day-old plants (28-30 days old when harvested). Dry mass, shoot Fe concentration, root porosity and patterns of radial O2 loss (ROL) along roots were determined. In the aerobic solution, where Fe2+ was oxidised in the bulk medium, root dry mass increased with higher Fe2+; this was not the case in stagnant solutions, which had no significant root growth response, although Fe oxidation near the root surface was visible as a precipitate. In the highest Fe2+ treatment, shoot Fe concentrations in aerobic (667mgkg-1) and stagnant (433mgkg-1) solutions were below the level for toxicity (700mgkg-1). Rice responded to high Fe2+ in aerobic conditions by increasing root porosity and inducing strong barriers to ROL. In stagnant conditions, root porosity was already high and the ROL barrier induced, so these root aeration traits were not further influenced by the Fe2+ concentrations applied.
Collapse
Affiliation(s)
- Jenjira Mongon
- Division of Agronomy, Department of Plant Science and Natural Resources, Faculty of Agriculture, Chiang Mai University, Chiang Mai 50200, Thailand
| | - Dennis Konnerup
- School of Plant Biology and University of Western Australia Institute of Agriculture, Faculty of Science, The University of Western Australia, 35 Stirling Highway, Crawley, WA 6009, Australia
| | - Timothy D Colmer
- School of Plant Biology and University of Western Australia Institute of Agriculture, Faculty of Science, The University of Western Australia, 35 Stirling Highway, Crawley, WA 6009, Australia
| | - Benjavan Rerkasem
- Division of Agronomy, Department of Plant Science and Natural Resources, Faculty of Agriculture, Chiang Mai University, Chiang Mai 50200, Thailand
| |
Collapse
|
24
|
Souza IDC, Morozesk M, Duarte ID, Bonomo MM, Rocha LD, Furlan LM, Arrivabene HP, Monferrán MV, Matsumoto ST, Milanez CRD, Wunderlin DA, Fernandes MN. Matching pollution with adaptive changes in mangrove plants by multivariate statistics. A case study, Rhizophora mangle from four neotropical mangroves in Brazil. CHEMOSPHERE 2014; 108:115-124. [PMID: 24875920 DOI: 10.1016/j.chemosphere.2014.02.066] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/08/2013] [Revised: 02/24/2014] [Accepted: 02/25/2014] [Indexed: 06/03/2023]
Abstract
Roots of mangrove trees have an important role in depurating water and sediments by retaining metals that may accumulate in different plant tissues, affecting physiological processes and anatomy. The present study aimed to evaluate adaptive changes in root of Rhizophora mangle in response to different levels of chemical elements (metals/metalloids) in interstitial water and sediments from four neotropical mangroves in Brazil. What sets this study apart from other studies is that we not only investigate adaptive modifications in R. mangle but also changes in environments where this plant grows, evaluating correspondence between physical, chemical and biological issues by a combined set of multivariate statistical methods (pattern recognition). Thus, we looked to match changes in the environment with adaptations in plants. Multivariate statistics highlighted that the lignified periderm and the air gaps are directly related to the environmental contamination. Current results provide new evidences of root anatomical strategies to deal with contaminated environments. Multivariate statistics greatly contributes to extrapolate results from complex data matrixes obtained when analyzing environmental issues, pointing out parameters involved in environmental changes and also evidencing the adaptive response of the exposed biota.
Collapse
Affiliation(s)
- Iara da Costa Souza
- Universidade Federal de São Carlos, Dep. Ciências Fisiológicas, Av. Washington Luiz, Km 235, 13565-905 São Carlos, São Paulo, Brazil
| | - Mariana Morozesk
- Universidade Federal do Espírito Santo, Dep. Ciências Biológicas, Av. Fernando Ferrari, 514, 29075-910 Vitória, Brazil
| | - Ian Drumond Duarte
- Universidade Federal do Espírito Santo, Dep. Ciências Biológicas, Av. Fernando Ferrari, 514, 29075-910 Vitória, Brazil
| | - Marina Marques Bonomo
- Universidade Federal do Espírito Santo, Dep. Ciências Biológicas, Av. Fernando Ferrari, 514, 29075-910 Vitória, Brazil
| | - Lívia Dorsch Rocha
- Universidade Federal do Espírito Santo, Dep. Ciências Biológicas, Av. Fernando Ferrari, 514, 29075-910 Vitória, Brazil
| | - Larissa Maria Furlan
- Universidade Federal do Espírito Santo, Dep. Ciências Biológicas, Av. Fernando Ferrari, 514, 29075-910 Vitória, Brazil
| | - Hiulana Pereira Arrivabene
- Universidade Federal do Espírito Santo, Dep. Ciências Biológicas, Av. Fernando Ferrari, 514, 29075-910 Vitória, Brazil
| | - Magdalena Victoria Monferrán
- ICYTAC - Instituto de Ciencia y Tecnología de Alimentos Córdoba, CONICET and Facultad de Ciencias Químicas, Universidad Nacional de Córdoba, Bv. Dr. Juan Filloy s/n, Ciudad Universitaria, 5000 Córdoba, Argentina
| | - Silvia Tamie Matsumoto
- Universidade Federal do Espírito Santo, Dep. Ciências Biológicas, Av. Fernando Ferrari, 514, 29075-910 Vitória, Brazil
| | - Camilla Rozindo Dias Milanez
- Universidade Federal do Espírito Santo, Dep. Ciências Biológicas, Av. Fernando Ferrari, 514, 29075-910 Vitória, Brazil
| | - Daniel Alberto Wunderlin
- ICYTAC - Instituto de Ciencia y Tecnología de Alimentos Córdoba, CONICET and Facultad de Ciencias Químicas, Universidad Nacional de Córdoba, Bv. Dr. Juan Filloy s/n, Ciudad Universitaria, 5000 Córdoba, Argentina.
| | - Marisa Narciso Fernandes
- Universidade Federal de São Carlos, Dep. Ciências Fisiológicas, Av. Washington Luiz, Km 235, 13565-905 São Carlos, São Paulo, Brazil.
| |
Collapse
|
25
|
Wang X, Tam NFY, Fu S, Ametkhan A, Ouyang Y, Ye Z. Selenium addition alters mercury uptake, bioavailability in the rhizosphere and root anatomy of rice (Oryza sativa). ANNALS OF BOTANY 2014; 114:271-8. [PMID: 24948669 PMCID: PMC4111379 DOI: 10.1093/aob/mcu117] [Citation(s) in RCA: 40] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/03/2023]
Abstract
BACKGROUND AND AIMS Mercury (Hg) is an extremely toxic pollutant, especially in the form of methylmercury (MeHg), whereas selenium (Se) is an essential trace element in the human diet. This study aimed to ascertain whether addition of Se can produce rice with enriched Se and lowered Hg content when growing in Hg-contaminated paddy fields and, if so, to determine the possible mechanisms behind these effects. METHODS Two cultivars of rice (Oryza sativa, japonica and indica) were grown in either hydroponic solutions or soil rhizobags with different Se and Hg treatments. Concentrations of total Hg, MeHg and Se were determined in the roots, shoots and brown rice, together with Hg uptake kinetics and Hg bioavailability in the soil. Root anatonmy was also studied. KEY RESULTS The high Se treatment (5 μg g(-1)) significantly increased brown rice yield by 48 % and total Se content by 2·8-fold, and decreased total Hg and MeHg by 47 and 55 %, respectively, compared with the control treatments. The high Se treatment also markedly reduced 'water-soluble' Hg and MeHg concentrations in the rhizosphere soil, decreased the uptake capacity of Hg by roots and enhanced the development of apoplastic barriers in the root endodermis. CONCLUSIONS Addition of Se to Hg-contaminated soil can help produce brown rice that is simultaneously enriched in Se and contains less total Hg and MeHg. The lowered accumulation of total Hg and MeHg appears to be the result of reduced bioavailability of Hg and production of MeHg in the rhizosphere, suppression of uptake of Hg into the root cells and an enhancement of the development of apoplastic barriers in the endodermis of the roots.
Collapse
Affiliation(s)
- Xun Wang
- State Key Laboratory of Biocontrol and Guangdong Key Laboratory of Plant Resources, School of Life Sciences, Sun Yat-sen University, Guangzhou 510006, PR China
| | - Nora Fung-Yee Tam
- Department of Biology and Chemistry, City University of Hong Kong, Hong Kong SAR, PR China State Key Laboratory in Marine Pollution, City University of Hong Kong, Hong Kong SAR, PR China
| | - Shi Fu
- Fine Arts College, Sichuan Normal University, Chengdu 610110, PR China
| | - Aray Ametkhan
- State Key Laboratory of Biocontrol and Guangdong Key Laboratory of Plant Resources, School of Life Sciences, Sun Yat-sen University, Guangzhou 510006, PR China
| | - Yun Ouyang
- State Key Laboratory of Biocontrol and Guangdong Key Laboratory of Plant Resources, School of Life Sciences, Sun Yat-sen University, Guangzhou 510006, PR China
| | - Zhihong Ye
- State Key Laboratory of Biocontrol and Guangdong Key Laboratory of Plant Resources, School of Life Sciences, Sun Yat-sen University, Guangzhou 510006, PR China
| |
Collapse
|
26
|
da Souza I, Bonomo MM, Morozesk M, Rocha LD, Duarte ID, Furlan LM, Arrivabene HP, Monferrán MV, Matsumoto ST, Milanez CRD, Wunderlin DA, Fernandes MN. Adaptive plasticity of Laguncularia racemosa in response to different environmental conditions: integrating chemical and biological data by chemometrics. ECOTOXICOLOGY (LONDON, ENGLAND) 2014; 23:335-348. [PMID: 24445776 DOI: 10.1007/s10646-014-1191-0] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Accepted: 01/07/2014] [Indexed: 06/03/2023]
Abstract
Mangroves are dynamic environments under constant influence of anthropic contaminants. The correlation between environmental contamination levels and possible changes in the morphology of plants, evaluated by multivariate statistics helps to highlight matching between these variables. This study aimed to evaluate the uptake and translocation of metals and metalloids in roots and leaves as well as the changes induced in both anatomy and histochemistry of roots of Laguncularia racemosa inhabiting two estuaries of Espírito Santo (Brazil) with different pollution degrees. The analysis of 14 elements in interstitial water, sediments and plants followed by multivariate statistics, allowed the differentiation of studied sites, showing good match between levels of elements in the environment with the corresponding in plants. L. racemosa showed variations in their root anatomy in different collection areas, with highest values of cortex/vascular cylinder ratio, periderm thickness and air gap area in Vitória Bay, the most polluted sampling area. These three parameters were also important to differentiate the mangrove areas by linear discriminant analysis. The development stage of aerenchyma in roots reflected the oxygen availability in the water, being found a negative correlation between these variables. The combined use of chemical and biological analyses responded quite well to different pollution scenarios, matching morphological responses to physical and chemical parameters, measured at different partitions within the estuary. Thus, L. racemosa can be confirmed as a reliable sentinel plant for biomonitoring of estuaries impacted by anthropic pollution.
Collapse
Affiliation(s)
- Iara da Souza
- Department of Physiological Sciences, Federal University of São Carlos, Ave. Washington Luiz, Km 235, São Carlos, São Paulo, 13565-905, Brazil
| | | | | | | | | | | | | | | | | | | | | | | |
Collapse
|
27
|
Krauss KW, McKee KL, Lovelock CE, Cahoon DR, Saintilan N, Reef R, Chen L. How mangrove forests adjust to rising sea level. THE NEW PHYTOLOGIST 2014; 202:19-34. [PMID: 24251960 DOI: 10.1111/nph.12605] [Citation(s) in RCA: 142] [Impact Index Per Article: 14.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/08/2013] [Accepted: 09/30/2013] [Indexed: 06/02/2023]
Abstract
Mangroves are among the most well described and widely studied wetland communities in the world. The greatest threats to mangrove persistence are deforestation and other anthropogenic disturbances that can compromise habitat stability and resilience to sea-level rise. To persist, mangrove ecosystems must adjust to rising sea level by building vertically or become submerged. Mangroves may directly or indirectly influence soil accretion processes through the production and accumulation of organic matter, as well as the trapping and retention of mineral sediment. In this review, we provide a general overview of research on mangrove elevation dynamics, emphasizing the role of the vegetation in maintaining soil surface elevations (i.e. position of the soil surface in the vertical plane). We summarize the primary ways in which mangroves may influence sediment accretion and vertical land development, for example, through root contributions to soil volume and upward expansion of the soil surface. We also examine how hydrological, geomorphological and climatic processes may interact with plant processes to influence mangrove capacity to keep pace with rising sea level. We draw on a variety of studies to describe the important, and often under-appreciated, role that plants play in shaping the trajectory of an ecosystem undergoing change.
Collapse
Affiliation(s)
- Ken W Krauss
- US Geological Survey, National Wetlands Research Center, Lafayette, LA, 70506, USA
| | - Karen L McKee
- US Geological Survey, National Wetlands Research Center, Lafayette, LA, 70506, USA
| | - Catherine E Lovelock
- School of Biological Sciences, University of Queensland, St Lucia, Qld, 4072, Australia
| | - Donald R Cahoon
- US Geological Survey, Patuxent Wildlife Research Center, Beltsville, MD, 20705, USA
| | - Neil Saintilan
- Office of Environment and Heritage, NSW Department of Premier and Cabinet, Sydney, NSW, 1232, Australia
| | - Ruth Reef
- School of Biological Sciences, University of Queensland, St Lucia, Qld, 4072, Australia
| | - Luzhen Chen
- Key Laboratory of Ministry of Education for Coastal and Wetland Ecosystems, College of the Environment and Ecology, Xiamen University, Xiamen, 361005, Fujian, China
| |
Collapse
|
28
|
Wang Y, Fang L, Lin L, Luan T, Tam NFY. Effects of low molecular-weight organic acids and dehydrogenase activity in rhizosphere sediments of mangrove plants on phytoremediation of polycyclic aromatic hydrocarbons. CHEMOSPHERE 2014; 99:152-159. [PMID: 24287262 DOI: 10.1016/j.chemosphere.2013.10.054] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/17/2013] [Revised: 09/29/2013] [Accepted: 10/16/2013] [Indexed: 06/02/2023]
Abstract
This work evaluated the roles of the low-molecular-weight organic acids (LMWOAs) from root exudates and the dehydrogenase activity in the rhizosphere sediments of three mangrove plant species on the removal of mixed PAHs. The results showed that the concentrations of LMWOAs and dehydrogenase activity changed species-specifically with the levels of PAH contamination. In all plant species, the concentration of citric acid was the highest, followed by succinic acid. For these acids, succinic acid was positively related to the removal of all the PAHs except Chr. Positive correlations were also found between the removal percentages of 4-and 5-ring PAHs and all LMWOAs, except citric acid. LMWOAs enhanced dehydrogenase activity, which positively related to PAH removal percentages. These findings suggested that LMWOAs and dehydrogenase activity promoted the removal of PAHs. Among three mangrove plants, Bruguiera gymnorrhiza, the plant with the highest root biomass, dehydrogenase activity and concentrations of LMWOAs, was most efficient in removing PAHs.
Collapse
Affiliation(s)
- Yuanyuan Wang
- MOE Key Laboratory of Aquatic Product Safety, Key Laboratory of Biodiversity Dynamics and Conservation of Guangdong Higher Education Institute, School of Life Sciences, Sun Yat-sen University, Guangzhou 510275, China; Department of Biology and Chemistry, City University of Hong Kong, Tat Chee Avenue, Kowloon, Hong Kong, China
| | - Ling Fang
- MOE Key Laboratory of Aquatic Product Safety, Key Laboratory of Biodiversity Dynamics and Conservation of Guangdong Higher Education Institute, School of Life Sciences, Sun Yat-sen University, Guangzhou 510275, China
| | - Li Lin
- MOE Key Laboratory of Aquatic Product Safety, Key Laboratory of Biodiversity Dynamics and Conservation of Guangdong Higher Education Institute, School of Life Sciences, Sun Yat-sen University, Guangzhou 510275, China.
| | - Tiangang Luan
- MOE Key Laboratory of Aquatic Product Safety, Key Laboratory of Biodiversity Dynamics and Conservation of Guangdong Higher Education Institute, School of Life Sciences, Sun Yat-sen University, Guangzhou 510275, China; Department of Biology and Chemistry, City University of Hong Kong, Tat Chee Avenue, Kowloon, Hong Kong, China
| | - Nora F Y Tam
- Department of Biology and Chemistry, City University of Hong Kong, Tat Chee Avenue, Kowloon, Hong Kong, China; State Key Laboratory in Marine Pollution, City University of Hong Kong, Tat Chee Avenue, Kowloon, Hong Kong, China.
| |
Collapse
|
29
|
Manzur ME, Grimoldi AA, Insausti P, Striker GG. Radial oxygen loss and physical barriers in relation to root tissue age in species with different types of aerenchyma. FUNCTIONAL PLANT BIOLOGY : FPB 2014; 42:9-17. [PMID: 32480649 DOI: 10.1071/fp14078] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/09/2014] [Accepted: 07/02/2014] [Indexed: 06/11/2023]
Abstract
Plant root aeration relies on aerenchyma and barrier formation in outer cortex influencing the radial oxygen loss (ROL) from roots towards the rhizosphere. Plant species display large variation in strategies for both responses. We investigated the impacts of root-zone hypoxia on aerenchyma formation and development of ROL apoplastic barriers in the outer cortex as a function of root tissue age using three lowland grassland species, each with alternative aerenchyma structure. All species increased root aerenchyma and continued with root elongation after imposing hypoxia. However, ROL barrier development differed: (i) Rumex crispus L. displayed only 'partial' barrier to ROL evidenced at older tissue ages, (ii) Cyperus eragrostis Lam. initiated a 'tighter' barrier to ROL following exposure to hypoxia in tissues older than 3 days, and (iii) Paspalidium geminatum (Forssk.) Stapf demonstrated highly effective inhibition of ROL under aerated and hypoxic conditions at all tissue ages related to constitutive 'tight' apoplastic barriers in outer cortex. Thus, hypoxic conditions affected root elongation and 'tightness' of apoplastic barriers depending on species. The physiological implications of the different ROL responses among species in relation to the differential formation of barriers are discussed.
Collapse
Affiliation(s)
- Milena E Manzur
- IFEVA, CONICET/Facultad de Agronomía, Universidad de Buenos Aires, Avenida San Martín 4453, C1417DSE Buenos Aires, Argentina
| | - Agustín A Grimoldi
- IFEVA, CONICET/Facultad de Agronomía, Universidad de Buenos Aires, Avenida San Martín 4453, C1417DSE Buenos Aires, Argentina
| | - Pedro Insausti
- IFEVA, CONICET/Facultad de Agronomía, Universidad de Buenos Aires, Avenida San Martín 4453, C1417DSE Buenos Aires, Argentina
| | - Gustavo G Striker
- IFEVA, CONICET/Facultad de Agronomía, Universidad de Buenos Aires, Avenida San Martín 4453, C1417DSE Buenos Aires, Argentina
| |
Collapse
|
30
|
Zhang Q, Yan C, Liu J, Lu H, Wang W, Du J, Duan H. Silicon alleviates cadmium toxicity in Avicennia marina (Forsk.) Vierh. seedlings in relation to root anatomy and radial oxygen loss. MARINE POLLUTION BULLETIN 2013; 76:187-193. [PMID: 24095049 DOI: 10.1016/j.marpolbul.2013.09.005] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/21/2013] [Revised: 08/26/2013] [Accepted: 09/01/2013] [Indexed: 06/02/2023]
Abstract
The effects of Si on growth, the anatomy of the roots, radial oxygen loss (ROL) and Fe/Mn plaque on the root surface were investigated in Avicennia marina (Forsk.) Vierh. seedlings under Cd stress. Si prompted the growth of seedlings and reduced the Cd concentration in the root, stem and leaf of A. marina. Si prompted the development of the apoplastic barrier in the roots, which may be related to the reduction of Cd uptake. The higher amount of ROL and Mn plaque on the root surface due to Si were also related to the promotion of Cd tolerance in A. marina seedlings. Therefore, it is concluded that the alteration of the anatomy of the roots, the increase of ROL and Mn plaque of A. marina seedlings play an important role in alleviation of Cd toxicity due to Si.
Collapse
Affiliation(s)
- Qiong Zhang
- Key Laboratory of Ministry of Education for Coastal and Wetland Ecosystems, School of Life Sciences, Xiamen University, Xiangan South Road, Xiangan District, Xiamen 361102, Fujian Province, PR China; Department of Biological Sciences and Biotechnology, Minnan Normal University, Zhangzhou 363000, Fujian Province, PR China
| | | | | | | | | | | | | |
Collapse
|
31
|
Cheng H, Wang YS, Ye ZH, Chen DT, Wang YT, Peng YL, Wang LY. Influence of N deficiency and salinity on metal (Pb, Zn and Cu) accumulation and tolerance by Rhizophora stylosa in relation to root anatomy and permeability. ENVIRONMENTAL POLLUTION (BARKING, ESSEX : 1987) 2012; 164:110-117. [PMID: 22361050 DOI: 10.1016/j.envpol.2012.01.034] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/27/2011] [Revised: 01/11/2012] [Accepted: 01/20/2012] [Indexed: 05/31/2023]
Abstract
Effects of N deficiency and salinity on root anatomy, permeability and metal (Pb, Zn and Cu) translocation and tolerance were investigated using mangrove seedlings of Rhizophora stylosa. The results showed that salt could directly reduce radial oxygen loss (ROL) by stimulation of lignification within exodermis. N deficiency, oppositely, would reduce lignification. Such an alteration in root permeability may also influence metal tolerance by plants. The data indicated that a moderate salinity could stimulate a lignified exodermis that delayed the entry of metals into the roots and thereby contributed to a higher metal tolerance, while N deficiency would aggravate metal toxicity. The results from sand pot trail further confirmed this issue. This study provides a barrier property of the exodermis in dealing with environments. The plasticity of root anatomy is likely an adaptive strategy to regulate the fluxes of gases, nutrients and toxins at root-soil interface.
Collapse
Affiliation(s)
- Hao Cheng
- State Key Laboratory of Tropical Oceanography, South China Sea Institute of Oceanology, Chinese Academy of Sciences, Guangzhou 510301, China
| | | | | | | | | | | | | |
Collapse
|