Article
Agronomy
Bi-Cheng Dong, Pu Wang, Fang-Li Luo
Summary: Quantitative tests were conducted to measure the transport rate and partitioning pattern of nitrogen (N) in a clonal species Alternanthera philoxeroides. The results showed that the transport of N towards the apical part was reduced at higher external N levels, while the transport towards the basal part was unaffected by external N levels. The rate of N transport to the apical part averaged 20.9%, and the rate of N transport to the basal part ranged between 0.2% and 6.3%, both dependent on the difference in N concentration between the apical and basal parts.
Article
Plant Sciences
Yan Wang, Chao Chen, Yuntao Xiong, Yi Wang, Qingjun Li
Summary: The study reveals that both invasive and native plants exhibit high tolerance to heavy metals, but under copper and cadmium treatments, the invasive plant shows a higher tolerance index and phenotypic plasticity, enhancing its competitive ability. This suggests that high phenotypic plasticity may be an important tolerance strategy for invasive plants, particularly in habitats with high levels of heavy metal pollution.
ENVIRONMENTAL AND EXPERIMENTAL BOTANY
(2021)
Article
Plant Sciences
Jin Zhang, Ning-Ning Li, Ao Song, Wen-Hua You, Dao -Lin Du
Summary: Clonal integration supports the growth of stressed ramets in Cd-contaminated environments, but its role may be influenced by the developmental status of the stressed ramets. This study found that clonal integration significantly enhanced the growth of apical ramets under Cd contamination and positively affected the fitness of the whole clonal fragments under high Cd treatment. However, clonal integration did not affect plant growth when basal ramets were subjected to Cd contamination. These findings highlight the importance of considering the developmental status of stressed ramets in understanding the role of clonal integration in heterogeneous heavy metal stress environments.
PLANT PHYSIOLOGY AND BIOCHEMISTRY
(2023)
Article
Environmental Sciences
Yan Wang, Yuntao Xiong, Yi Wang, Qingjun Li
Summary: This study found that in heavy metal polluted environments, interspecific competition and time factors influenced the invasiveness of the invasive plant Alternanthera philoxeroides, while the native plant Alternanthera sessilis exhibited stronger competitive ability. A. philoxeroides showed high plasticity in root allocation, which was more favorable for its growth under high cadmium levels.
SCIENCE OF THE TOTAL ENVIRONMENT
(2021)
Article
Plant Sciences
Wenhua You, Ningning Li, Jin Zhang, Ao Song, Daolin Du
Summary: This study investigated the effect of clonal integration on the growth and chlorophyll content index of the invasive clonal plant Alternanthera philoxeroides and the native species A. sessilis under different nutrient patch environments. The results showed that clonal integration significantly improved the growth of both species, with a greater positive effect observed in A. philoxeroides. Clonal integration also increased the chlorophyll content index of A. philoxeroides and the growth of basal ramets under high and low contrast patches. Overall, this study suggests that clonal integration may give invasive clonal plants a competitive advantage over native species in patchy habitats, especially in environments with higher heterogeneity.
Article
Plant Sciences
Qiu-Yue Fu, Cheng-Ling Yu, Ran Dong, Juan Shi, Fang-Li Luo, Jun-Qin Gao, Hong-Li Li, Bi-Cheng Dong, Fei-Hai Yu
Summary: This study examined the effects of herbivory on Alternanthera philoxeroides and found that herbivory in one generation can promote the growth of subsequent generations sprouted from secondary-root fragments, but have a neutral or negative effect on plants sprouted from primary-root fragments. The growth of third-generation plants was significantly reduced by herbivory in the same generation. DNA methylation level was found to increase in first-generation plants when damaged by herbivores. However, herbivory-induced changes in DNA methylation were not observed in second- and third-generation plants.
Article
Forestry
Yuanyuan Cui, Qiaoying Zhang, Tianwen Tang, Xinxin Deng, Lin Zhang, Peng Liu, Chang He, Yunchun Zhang
Summary: This study investigated the effect of cadmium contamination on the interspecific competition between the invasive plant Alternanthera philoxeroides and the landscape grass T. regens, as well as the intraspecific competition of A. philoxeroides at different densities. The results showed that interspecific competition alleviated cadmium damage, with the two species adopting different allocation strategies. Intraspecific competition had a significant density effect on A. philoxeroides.
Article
Environmental Sciences
Yin-fei Wang, Wen-bin Li, Hong-yan Deng, Lang Zhu, Jun-qi Li, Meng-ting Guo, Zhi-feng Liu
Summary: In this study, the application of plant litter extract (LE) in the soil remediation of heavy metals was investigated. The LE was used to modify purple soil, and its effects on soil properties and the adsorption characteristics of heavy metal ions were studied. The results showed that LE could improve the cation exchange capacity and specific surface area of the soil, and it had adsorption capacity for heavy metal ions.
JOURNAL OF ENVIRONMENTAL MANAGEMENT
(2022)
Article
Environmental Sciences
Christopher Beals, Hannah King, Ginger Bailey
Summary: We investigated the effects of copper and lead on the antioxidant enzyme response of two plant species, Alternanthera philoxeroides and Nasturtium officinale, by using a benchtop luminometer. Our results showed that A. philoxeroides was not affected by increasing concentrations of copper and lead, while the antioxidant enzyme response of N. officinale increased significantly when exposed to 10 and 25 ppm lead. A higher concentration of endogenous peroxidases was found in A. philoxeroides compared to N. officinale. We hypothesize that this higher concentration may be a mechanism used by hyperaccumulator plants to tolerate toxic levels of copper and lead.
ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
(2023)
Article
Agronomy
Li-Li Zheng, Si-Mei Yao, Wei Xue, Fei-Hai Yu
Summary: This study found that establishing small islands of safety in contaminated soil can greatly enhance plant growth performance, especially for clonal plants. The presence of safe islands increased the number of branches and total mass of clonal plants, and promoted the growth of mother plants.
Article
Environmental Sciences
Xin Luo, Haiying Du, Xiaochao Zhang, Yuhang Yang
Summary: In this study, novel magnetic biochars derived from Alternanthera philoxeroides and modified by different amines were prepared and used as efficient adsorbents for Cr(VI) removal. Hexanediamine and melamine enhanced the specific surface area of biochars, while L-glutathione reduced it. The adsorption process of modified biochars mainly followed chemical adsorption. Amines played a significant role in removing Cr(VI) through complexation, electrostatic interaction, and reduction. The amine-modified biochars exhibited excellent adsorption performance, enhanced specific surface area, and good recyclability, making them promising candidates for invasive plant control and wastewater treatment.
ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
(2022)
Article
Ecology
Jianyong Wang, Tongtong Xu, Yue Wang, Guangyin Li, Iram Abdullah, Zhiwei Zhong, Jushan Liu, Wanyue Zhu, Ling Wang, Deli Wang, Fei-Hai Yu
Summary: Physiological integration in clonal plants significantly impacts the growth of whole clones in both homogeneous and heterogeneous environments, with a more substantial effect on recipient ramets. It plays a stronger role in recipient ramets' growth in heterogeneous environments compared to homogeneous ones.
FUNCTIONAL ECOLOGY
(2021)
Article
Plant Sciences
Xiao-Gai Wang, Rui Zhang, Zi-Han Qian, Shang-Yan Qiu, Xue-Ge He, Shu-Jie Wang, Chao Si
Summary: This study demonstrates that increased nutrient availability can promote the growth of invasive plants under heavy metal stress. The response of invasive plants to heavy metal stress varies with different levels of nutrient availability, indicating that nutrients can affect clonal reproduction, stem morphology, and biomass allocation.
Article
Forestry
Xiao-Xiao Cao, Wei Xue, Ning-Fei Lei, Fei-Hai Yu
Summary: Clonal integration can alter the foraging response of clonal plants in heterogeneous environments, but the effect is species-specific.
Article
Environmental Sciences
Zhongchuang Liu, Khanh-Quang Tran
Summary: This review discusses the challenges of disposing plant biomass containing heavy metals (HMs) in phytoremediation technology, and introduces various disposal and utilization methods such as heat treatment, extraction treatment, microbial treatment, compression landfill, and synthesis of nanomaterials. Each disposal method has different operation processes and technical parameters, with the potential for migration and transformation of HMs. Some methods may also generate by-products. The paper aims to provide reference for choosing and using the appropriate method for treating plant biomass with HMs after phytoremediation.
ECOTOXICOLOGY AND ENVIRONMENTAL SAFETY
(2021)