The role of radial oxygen loss and root anatomy on zinc uptake and tolerance in mangrove seedlings

2010 ◽  
Vol 158 (5) ◽  
pp. 1189-1196 ◽  
Author(s):  
H. Cheng ◽  
Y. Liu ◽  
N.F.Y. Tam ◽  
X. Wang ◽  
S.Y. Li ◽  
...  
Keyword(s):  
Zinc Uptake ◽  
Root Anatomy ◽  
Radial Oxygen Loss ◽  
Oxygen Loss ◽  
Mangrove Seedlings

scholarly journals Interactions among Fe2+, S2–, and Zn2+ tolerance, root anatomy, and radial oxygen loss in mangrove plants

2012 ◽  
Vol 63 (7) ◽  
pp. 2619-2630 ◽  
Author(s):  
Hao Cheng ◽  
Dan-Ting Chen ◽  
Nora Fung-Yee Tam ◽  
Gui-Zhu Chen ◽  
Shi-Yu Li ◽  
...  
Keyword(s):  
Root Anatomy ◽  
Radial Oxygen Loss ◽  
Oxygen Loss ◽  
Mangrove Plants

Anatomical Adaptive Strategies to Flooding and Rhizosphere Oxidation in Mangrove Seedlings

1996 ◽  
Vol 44 (3) ◽  
pp. 297 ◽  
Author(s):  
T Youssef ◽  
P Saenger
Keyword(s):  
Root Surface ◽  
Limited Information ◽  
Ground Tissue ◽  
Radial Oxygen Loss ◽  
Waterlogging Tolerance ◽  
Mangrove Species ◽  
Root Porosity ◽  
Oxygen Loss ◽  
Diffusive Resistance ◽  
Mangrove Seedlings

Limited information exists on the relation between the capacity of mangrove seedlings to oxidise the rhizosphere and their differential waterlogging tolerance. Laboratory experiments were conducted to estimate radial oxygen loss (ROL) by the entire root, the area of oxidising sites (AOS) on the root surface, root porosity (POR), and the internal diffusive resistance in the ground tissue of seedlings of six mangrove species that show a differential response to flooding. Radial oxygen loss was extremely low in all viviparous seedlings (0.7-1.5 μmol O2 per cm2AOS per day). Differential tolerance of species coincided with the degree of porosity (14.8-45.7%) and the ability of seedlings to develop barriers to oxygen leakage on the root surface. The percentage area of lacunae in the ground tissue of seedlings of the four viviparous species revealed a constriction of the air flow path at the hypocotyl junction. These findings suggest that: (i) the differential tolerance to waterlogging in mangrove seedlings is not simply based on their ability to oxidise the rhizosphere; (ii) the high diffusive resistance in the hypocotyl junction is likely to affect root aeration when the plant's access to air is limited by partial or total submergence; and (iii) waterlogging tolerance is probably a function of the strategy by which roots conserve oxygen to maintain aerobic metabolism for longer periods during submergence. Implications of these findings in seedlings are discussed in relation to other anatomical and morphological adaptations to waterlogging in mature mangroves.

Phosphorus effects on radial oxygen loss, root porosity and iron plaque in two mangrove seedlings under cadmium stress

2017 ◽  
Vol 119 (1) ◽  
pp. 262-269 ◽  
Author(s):  
Minyue Dai ◽  
Jingchun Liu ◽  
Wenwen Liu ◽  
Haoliang Lu ◽  
Hui Jia ◽  
...  
Keyword(s):  
Cadmium Stress ◽  
Iron Plaque ◽  
Radial Oxygen Loss ◽  
Root Porosity ◽  
Oxygen Loss ◽  
Mangrove Seedlings

Silicon alleviates cadmium toxicity in Avicennia marina (Forsk.) Vierh. seedlings in relation to root anatomy and radial oxygen loss

2013 ◽  
Vol 76 (1-2) ◽  
pp. 187-193 ◽  
Author(s):  
Qiong Zhang ◽  
Chongling Yan ◽  
Jingchun Liu ◽  
Haoliang Lu ◽  
Wenyun Wang ◽  
...  
Keyword(s):  
Cadmium Toxicity ◽  
Avicennia Marina ◽  
Root Anatomy ◽  
Radial Oxygen Loss ◽  
Oxygen Loss

Season Effects on Subsurface Constructed Wetlands Performance: Role of Radial Oxygen Loss of Phragmites australis

2019 ◽  
Vol 47 (8) ◽  
pp. 1800428
Author(s):  
Qian Wang ◽  
Zhenfeng Cao ◽  
Yanbiao Hu ◽  
Qiang Kong ◽  
Fei Xu ◽  
...  
Keyword(s):  
Phragmites Australis ◽  
Constructed Wetlands ◽  
Radial Oxygen Loss ◽  
Oxygen Loss

Mixed heavy metals tolerance and radial oxygen loss in mangrove seedlings

2009 ◽  
Vol 58 (12) ◽  
pp. 1843-1849 ◽  
Author(s):  
Y. Liu ◽  
N.F.Y. Tam ◽  
J.X. Yang ◽  
N. Pi ◽  
M.H. Wong ◽  
...  
Keyword(s):  
Heavy Metals ◽  
Radial Oxygen Loss ◽  
Oxygen Loss ◽  
Mangrove Seedlings ◽  
Metals Tolerance

scholarly journals Constructed Wetlands: A Review on the Role of Radial Oxygen Loss in the Rhizosphere by Macrophytes

Water ◽  
2018 ◽  
Vol 10 (6) ◽  
pp. 678 ◽  
Author(s):  
Qian Wang ◽  
Yanbiao Hu ◽  
Huijun Xie ◽  
Zhongchen Yang
Keyword(s):  
Constructed Wetlands ◽  
Radial Oxygen Loss ◽  
Oxygen Loss

Radial oxygen loss is correlated with nitrogen nutrition in mangroves

2020 ◽  
Vol 40 (11) ◽  
pp. 1548-1560
Author(s):  
Hao Cheng ◽  
Yong Liu ◽  
Zhao-Yu Jiang ◽  
You-Shao Wang
Keyword(s):  
Root Anatomy ◽  
Ammonia Oxidizing Bacteria ◽  
High Porosity ◽  
Strongly Correlated ◽  
Radial Oxygen Loss ◽  
Mangrove Species ◽  
Rhizophora Stylosa ◽  
Oxygen Loss ◽  
Soil Interface ◽  
Leaf N

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.

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