Shanshan Zhong

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Nitrogen Influence to the Independent Invasion and the Co-Invasion of Solidago canadensis and Conyza canadensis via Intensified Allelopathy

Sustainability (2022)

Jialong Zhou Zhelun Xu Shanshan Zhong Youli Yu Zhongyi Xu

The allelopathy of alien plants is critical to their successful invasion. In nature, two alien plants can co-invade the same habitat. Changes in the forms of nitrogen may have the potential to alter the invasion process of alien plants by causing alterations in their allelopathy. This study aimed to evaluate the individual and combined allelopathy of two alien plants from the Asteraceae family, Solidago canadensis L. and Conyza canadensis (L.) Cronq. This study examined the effects of aqueous leaf extracts of the two alien plants with different nitrogen forms (NO3−N, NH4−N, and CO(NH2)2−N, and the mixed nitrogen forms at a 1:1:1 ratio) on the seed germination and seedling growth of the horticultural Asteraceae species Lactuca sativa L. using a germination bioassay. The allelopathy of the two alien plants significantly reduced the seed germination and seedling growth of L. sativa. Extracts from S. canadensis produced stronger allelopathy on the seed germination and seedling growth of L. sativa compared with those from C. canadensis. The mixture of extracts from the two alien plants produced an antagonistic effect when compared with the effects of extracts from each plant species. The addition of nitrogen intensified the allelopathy of the two alien plants on the seed germination and seedling growth of L. sativa. The degree of influence of nitrogen on the individual and combined allelopathy of the two alien plants was similar. Thus, nitrogen deposition may facilitate the independent invasion and co-invasion of the two alien plants via intensified allelopathy.

Allelopathy

Solidago canadensis

10.3390/su141911970

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Citations (10)

Photosynthetic capacity of Erigeron canadensis L. may be more critical to its growth performance than photosynthetic area

Biologia (2023)

Chunjiang He Yue Li Chuang Li Yueyang Wang Zhelun Xu

Photosynthetic capacity

Photosynthetic efficiency

10.1007/s11756-023-01317-6

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Citations (4)

Invasive Amaranthus retroflexus obtains a competitive advantage over native A. tricolor under the addition of A. retroflexus leaf litter

Ecological Research (2024)

Chuang Li Yue Li Zhongyi Xu Mawei Zhu Yuqing Wei

Monoculture

Dominance (genetics)

10.1111/1440-1703.12539

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Allelopathy of Native Pinus massoniana Lamb. on Invasive Species: Stronger Effect on Amaranthus retroflexus L. than on Celosia argentea L.

Polish Journal of Ecology (2024)

Chuang Li Yue Li Zhelun Xu Shanshan Zhong Jun Liu

Most allelopathic studies have focused only on the allelopathy of invasive plants on the growth performance of native plants, while neglecting the allelopathy of native plants on the growth performance of invasive plants, especially species that can co-invade the same ecosystem. This study aimed to evaluate the allelopathy of the native plant Pinus massoniana Lamb. on the seed germination and seedling growth of two invasive Amaranthaceae species, Celosia argentea L. and Amaranthus retroflexus L. using a germination bioassay. Pinus massoniana showed significant allelopathy on the seed germination and seedling growth of the two invasive Amaranthaceae species. The allelopathy of P. massoniana on the seed germination and seedling growth of the two invasive Amaranthaceae species may be attributed to the effects of the generated stress on their germination activity. Pinus massoniana exhibited stronger allelopathy on the seed germination and seedling growth of A. retroflexus than on that of C. argentea. Thus, the invasiveness of A. retroflexus is expected to be lower than that of C. argentea in contact with P. massoniana. The allelopathy of P. massoniana on the seed germination and seedling growth of the two invasive Amaranthaceae species under the co-cultivated conditions was stronger than that under the monocultural conditions. Accordingly, the aqueous extract of P. massoniana can be considered a potential bioherbicide for the control of the two invasive Amaranthaceae species, particularly when both species co-occuring.

Allelopathy

Pinus massoniana

Amaranthaceae

Alternanthera philoxeroides

10.3161/15052249pje2023.71.4.001

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Does Bidens pilosa L. Affect Carbon and Nitrogen Contents, Enzymatic Activities, and Bacterial Communities in Soil Treated with Different Forms of Nitrogen Deposition?

Microorganisms (2024)

Yingsheng Liu Yizhuo Du Yue Li Chuang Li Shanshan Zhong

The deposition of nitrogen in soil may be influenced by the presence of different nitrogen components, which may affect the accessibility of soil nitrogen and invasive plant-soil microbe interactions. This, in turn, may alter the success of invasive plants. This study aimed to clarify the influences of the invasive plant

Deposition

Soil carbon

10.3390/microorganisms12081624

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BmC/EBPZ gene is essential for the larval growth and development of silkworm, Bombyx mori

Frontiers in Physiology (2024)

Xinglin Mei Tianchen Huang Anli Chen Weibin Liu Jiang Li

The genetic male sterile line ( GMS ) of the silkworm Bombyx mori is a recessive mutant that is naturally mutated from the wild-type 898WB strain. One of the major characteristics of the GMS mutant is its small larvae. Through positional cloning, candidate genes for the GMS mutant were located in a region approximately 800.5 kb long on the 24th linkage group of the silkworm. One of the genes was Bombyx mori CCAAT/enhancer-binding protein zeta ( BmC/EBPZ ), which is a member of the basic region-leucine zipper transcription factor family. Compared with the wild-type 898WB strain, the GMS mutant features a 9 bp insertion in the 3′end of open reading frame sequence of BmC/EBPZ gene. Moreover, the high expression level of the BmC/EBPZ gene in the testis suggests that the gene is involved in the regulation of reproduction-related genes. Using the CRISPR/Cas9-mediated knockout system, we found that the BmC/EBPZ knockout strains had the same phenotypes as the GMS mutant, that is, the larvae were small. However, the larvae of BmC/EBPZ knockout strains died during the development of the third instar. Therefore, the BmC/EBPZ gene was identified as the major gene responsible for GMS mutation.

Bombyx

Gene knockout

Wild type

Gene knockin

10.3389/fphys.2024.1298869

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Citations (1)

Acid deposition at higher acidity weakens the antagonistic responses during the co-decomposition of two Asteraceae invasive plants

Ecotoxicology and Environmental Safety (2022)

Shanshan Zhong Zhelun Xu Youli Yu Huiyuan Cheng Mei Wei

Co-invasion by two invasive plant species (IPS) can occur in the same habitat. Diversified acid deposition may change the co-invasion process by altering litter decomposition and plant-soil feedback signalling. This study examined the co-decomposition of two Asteraceae IPS (Solidago canadensis L. and Bidens pilosa L.) on litter decomposition rate, soil enzyme activities, and soil N-fixing bacterial communities under diversified acid deposition (mixed acid deposition at pH 5.6 and at pH 4.5, sulfuric acid at pH 4.5, and nitric acid at pH 4.5). B. pilosa litter degraded faster than S. canadensis litter. Acid deposition at higher acidity accelerated the decomposition rate of both pure S. canadensis litter and the equally mixed litters from the two Asteraceae IPS. Antagonistic responses may occur during the co-decomposition of the two Asteraceae IPS with mixed acid deposition, regardless of the pH, as well as with nitric acid deposition at pH 4.5; in contrast, there may be neutral responses for the co-decomposition process with sulfuric acid at pH 4.5. The type of acid deposited may be one of the key factors affecting the intensity of the mixing effect affecting the co-decomposition. Acid deposition at higher acidity weakened the antagonistic responses for the co-decomposition of the two Asteraceae IPS compared with the response to weak acids. Together, these results indicate that acid deposition at higher acidity could facilitate the co-invasion of the two Asteraceae IPS mainly through accelerated litter decomposition as well as weakened antagonistic responses for co-decomposition.

Deposition

Nitric acid

Litter

Plant litter

10.1016/j.ecoenv.2022.114012

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Citations (13)

Invasion Intensity Modulates the Allelopathic Impact of Solidago canadensis L. Leaves and Roots Against Lactuca sativa L. During Germination and Early Seedling Stage

International Journal of Environmental Research (2022)

Youli Yu Huiyuan Cheng Zhelun Xu Shanshan Zhong Congyan Wang

Allelopathy

Solidago canadensis

10.1007/s41742-022-00428-3

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Citations (14)

Relationship between plant diversity and community stability and invasibility in the heterogeneous landscape of urban habitats undergoing Solidago canadensis invasion

Plant Ecology & Diversity (2024)

Huanshi Zhang Chuang Li Yue Li Zhelun Xu Shanshan Zhong

Background Solidago canadensis has become an invasive species in Chinese cities. Little progress has been made in understanding the relationship between the plant taxonomic diversity and community stability and invasibility of local plant communities during S. canadensis invasion, especially in heterogeneous landscapes. Progress in understanding the relationship between the key functional traits of S. canadensis and its invasion intensity and competitive advantage, especially in heterogeneous landscapes, is also currently limited.

Solidago canadensis

10.1080/17550874.2024.2372713

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Does Salt Stress Intensify the Allelopathic Effect of Four Asteraceae Invasive Plants?

Polish Journal of Ecology (2024)

Yue Li Chuang Li Shanshan Zhong Zhelun Xu Youli Yu

One of the main factors in the successful invasion of invasive plants is their allelopathy on the growth performance (especially seed germination and seedling growth) of neighboring plants. Salt stress, mainly mediated by soil salinization, may affect or even facilitate the process of invasion of invasive plants via their allelopathy. The aim of this study was to evaluate the allelopathy effect of four Asteraceae invasive plants, including Canada goldenrod (Solidago canadensis L.), horseweed (Conyza canadensis (L.) Cronq.), rallway beggaricks (Bidens pilosa L.), and daisy fleabane (Erigeron annuus (L.) Pers.), on seed germination and seedling growth of the horticultural Asteraceae species Lactuca sativa L. under a gradient of salt stress in an hydroponic incubation experiment. Salt stress significantly reduced seed germination and seedling growth of L. sativa. These four invasive plants are known to negatively affect seed germination and seedling growth of L. sativa through their allelopathy. The allelopathy of S. canadensis was stronger than that of the three other invasive plants. Salt stress significantly intensified the allelopathy of the four studied invasive plants (especially S. canadensis), and the facilitation of salt stress on the allelopathy of the four invasive plants (especially S. canadensis) significantly increased with increasing intensity of salt stress. Therefore, the increased level of salt stress may facilitate the process of invasion of the four studied invasive plants (especially S. canadensis) via their increased allelopathy negatively affecting the seed germination and seedling growth of neighboring plant species.

Allelopathy

10.3161/15052249pje2023.71.2.002

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Citations (2)