Phytotoxic mechanism of allelochemical liquiritin on root growth of lettuce seedlings

Yan, Zhiqiang; Tan, Jun; Guo, Kai; Yao, Lunguang

doi:10.1080/15592324.2020.1795581

Cited by 10 publications

(10 citation statements)

References 40 publications

(49 reference statements)

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“…First, they affect cellular structures directly involved in metabolism, such as organelles, or modify the balance of hormones linked to morphogenesis, such as auxin. These modifications can cause changes in cellular respiration, photosynthetic reactions and redox reactions and consequently decrease seedling growth by affecting cellular homeostasis [ 67 , 68 ]. This decrease is often related to the drop in root cell viability [ 69 ].…”

Section: Discussionmentioning

confidence: 99%

Reduction of Weed Growth under the Influence of Extracts and Metabolites Isolated from Miconia spp.

et al. 2022

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Weeds pose a problem, infesting areas and imposing competition and harvesting difficulties in agricultural systems. Studies that provide the use of alternative methods for weed control, in order to minimize negative impacts on the environment, have intensified. Native flora represents a source of unexplored metabolites with multiple applications, such as bioherbicides. Therefore, we aimed to carry out a preliminary phytochemical analysis of crude extracts and fractions of Miconia auricoma and M. ligustroides and to evaluate these and the isolated metabolites phytotoxicity on the growth of the target species. The growth bioassays were conducted with Petri dishes with lettuce, morning glory, and sourgrass seeds incubated in germination chambers. Phytochemical analysis revealed the presence of flavonoids, isolated myricetin, and a mixture of quercetin and myricetin. The results showed that seedling growth was affected in a dose-dependent manner, with the root most affected and the seedlings of the lettuce, morning glory, and sourgrass as the most sensitive species, respectively. Chloroform fractions and myricetin were the most inhibitory bioassays evaluated. The seedlings showed structural changes, such as yellowing, nonexpanded cotyledons, and less branched roots. These results indicate the phytotoxic potential of Miconia allelochemicals, since there was the appearance of abnormal seedlings and growth reduction.

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Section: Discussionmentioning

confidence: 99%

Reduction of Weed Growth under the Influence of Extracts and Metabolites Isolated from Miconia spp.

et al. 2022

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“…Gentian polysaccharides were analyzed by the anthrone-sulfuric acid method, using glucose as a standard (Yu et al 2019). The root vitality of GTSB was measured using triphenyltetrazolium chloride (TTC) (Yan et al 2020). The plant height of GTSB was measured using a ruler.…”

Section: Plant Physiological and Biochemical Indicators And The Soil ...mentioning

confidence: 99%

The characters of root-derived fungi from Gentiana scabra Bunge and the relations with their habitats

Wang

et al. 2023

Plant Soil

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Gentiana scabra Bunge (GTSB) root-derived fungi including endophytic fungi (EF) and rhizospheric fungi (RF) are key factors which in uence the quality and tness of this important herb. MethodsWe determined the population, diversity, and the dominant type of EF and RF in GTSB obtained from Liaoning, Yunnan and Jilin province, China by using ITS rRNA cloning and sequencing methods.Meanwhile, we investigated the potential in uence of different habitats on fungi communities, and analyzed the correlation between fungi communities, the main active metabolites of Gentian polysaccharide and gentiopicroside in GTSB and soil physicochemical properities. Results5,419 fungal isolates, belonging to 1 domain, 1 kingdom, 8 phyla, 32 classes, 104 orders, 280 families, 630 genera, 1,238 species were obtained. The population and diversity of EF and RF varied in both habitats and months, showing a signi cant difference. Among them, the predominant genera of EF were Lecidella and unclassi ed_p_Ascomycota, while the predominant genera of RF were complicated. Compared to EF, the diversity of rhizosphere fungi is more affected by soil physicochemical properties, including pH, water content, alkali-hydrolyzable nitrogen, available phosphorus, etc. Additionally, we found that the accumulation of gentiopicroside was positively correlated with EF of Epicoccum and RF of Mortierella, Solicoccozyma, Talaromyces and Trichoderma. The accumulation of Gentian polysaccharide was negatively correlated with EF of Lenzites, Mucor, Myrothecium and Saccharomycopsis and rhizosphere fungi, such as Botrytis, Cadophora, Cladophora, Didymela, Fusarium, etc. ConclusionsThis work will guide the development strategies to cultivate high-quality Gentiana scabra Bunge in the future and provide new ideas for the study of other medicinal plants.

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“…To avoid a bias towards including species with unusually strong allelopathic effects, we did not consider a priori information on phytotoxic or allelopathic effects when we selected our study species. However, later literature searches revealed that allelopathic effects have been reported for the alien species Crotalaria pallida (Ohdan et al 1995;Zhao et al 2019) and Trifolium repens (Wang et al 2012;Yu et al 2013), and for the native species Grycyrrhiza uralensis (Yan et al 2020). A criterion for selecting the five alien species was that they are all fully naturalized in China.…”

Section: Study Speciesmentioning

confidence: 99%

Allelopathic and competitive interactions between native and alien plants

Yuan

et al. 2021

Biol Invasions

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The novel-weapons and homeland-security hypotheses are based on the idea that aliens and natives are not adapted to each other’s allelochemicals as they did not co-evolve. However, as only a few studies have tested this, it remains unclear how important co-evolutionary history is in determining the strength of allelopathic interactions between aliens and natives. Here, we tested for potential pairwise allelopathic effects on each other of five alien and five native herbaceous species in China. We did a germination experiment and a competition experiment. In the germination experiment, we tested whether aqueous extracts of the ten study species had allelopathic effects on each other’s seed germination. In the competition experiment, we tested whether the alien and native species differed in their competitive effects and responses, and whether these were changed by the presence of activated carbon—a presumed allelopathy neutralizer– in the soil. Plant extracts had negative allelopathic effects on seed germination. This was particularly the case for extracts from the native species. Moreover, aqueous extracts had slightly stronger negative effects on germination of the aliens than on germination of the natives. In the competition experiment, on the other hand, the natives suffered more from competition than the alien species did, but we could not relate this to allelopathy. Alien plants had negative competitive and allelopathic effects on native plants, but the reverse was also true. These alien-native interactions, however, were not consistently stronger or weaker than native-native or alien-alien interactions.

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Phytotoxic mechanism of allelochemical liquiritin on root growth of lettuce seedlings

Cited by 10 publications

References 40 publications

Reduction of Weed Growth under the Influence of Extracts and Metabolites Isolated from Miconia spp.

Reduction of Weed Growth under the Influence of Extracts and Metabolites Isolated from Miconia spp.

The characters of root-derived fungi from Gentiana scabra Bunge and the relations with their habitats

Allelopathic and competitive interactions between native and alien plants

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