ORIGINAL RESEARCH
Physiological Responses and Nutrient
Absorption of Three Plants Under Extreme
Environments on a Tropical Coral Island
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1
Guangdong Provincial Key Laboratory of Applied Botany, South China Botanical Garden,
Chinese Academy of Sciences, 723 Xingke Road, Tianhe District, Guangzhou, 510650, China
2
Guangdong Province Data Center of Terrestrial and Marine Ecosystems Carbon Cycle, Guangzhou, 510650, China
3
National Ecological Science Data Center Guangdong Branch, South China Botanical Garden, Chinese Academy
of Sciences, 723 Xingke Road, Tianhe District, Guangzhou, 510650, China
4
Guangzhou Collaborative Innovation Center on Science-tech of Ecology and Landscape, South China Botanical
Garden, Chinese Academy of Sciences, 723 Xingke Road, Tianhe District, Guangzhou, 510650, China
5
College of Forestry & Architecture, South China Agricultural University, Guangzhou, 510642, China
6
School of Environment and Ecology, Xiamen University, Xiamen 361005, China
These authors had equal contribution to this work
Submission date: 2024-10-24
Final revision date: 2024-11-27
Acceptance date: 2024-12-16
Online publication date: 2025-04-16
Publication date: 2026-01-30
Corresponding author
Juxiu Liu
Guangdong Provincial Key Laboratory of Applied Botany, South China Botanical Garden,
Chinese Academy of Sciences, 723 Xingke Road, Tianhe District, Guangzhou, 510650, China
Xu Li
Guangdong Provincial Key Laboratory of Applied Botany, South China Botanical Garden,
Chinese Academy of Sciences, 723 Xingke Road, Tianhe District, Guangzhou, 510650, China
Pol. J. Environ. Stud. 2026;35(1):1323-1331
KEYWORDS
TOPICS
ABSTRACT
Coral islands’ stressful environments (high temperature, drought, intense light, and salinity) have
important impacts on plant survival and growth. Therefore, it is necessary to prioritize highly adaptable
plant species for coral islands. To investigate this, we assessed the physiological responses and nutrient
absorption of three woody plants – Casuarina equisetifolia, Morinda citrifolia, and Scaevola taccada
– at the three sampling sites (CK, Guangzhou City; S1, coral island, Sansha City, added garden soil;
S2, coral island, Sansha City, unadded garden soil) in China. The results showed that: (1) among the
three plants, M. citrifolia showed the best physiological adaptation. (2) M. citrifolia adapts to coral
island environments through elevated leaf-soluble protein content and reduced superoxide dismutase
(SOD) activity to increase tolerance to osmotic stress. (3) Soil composition plays an important role
in plant responses to harsh environments. This study provides basic data on the physiological responses
and nutrient absorption of three plants grown on coral islands, an essential reference for revegetation
and restoration of tropical coral islands.
CONFLICT OF INTEREST
The authors declare that they have no known competing financial interests or personal relationships that could have appeared to influence the work reported in this paper.
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