Benzoxazolin-2(3H)-ones - Generation, Effects and Detoxification in the Competition among Plants

Schulz, Margot; Sicker, Dieter; Hao, Huang

doi:10.1201/9780203492789.ch4

Cited by 7 publications

(1 citation statement)

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“…The allelopathic inhibition may lead to a homogenic composition of phytocoenoses due to selective pressure on susceptible species (Weidenhamer 2006) and facilitate maintaining high density of C. subtilis, primarily conditioned by the number of seeds deposited in the substrate in the previous growing seasons (Dajdok 2012; Münzbergová 2012). The allelopathic potential may be especially important in the early stages of C. subtilis growth and the formation of communities with the species, as it may delay and/or reduce the germination of other species and thus their competition (Sicker et al 2003). It was shown that even very low concentrations of allelochemicals, if constantly delivered to the habitat, may affect the diversity of plant communities and the distribution pattern of some species (Kruse et al 2000).…”

Section: Discussionmentioning

confidence: 99%

Intrapopulational variability and biochemistry of the globally rare species Coleanthus subtilis in response to the sediment parameters

Dajdok,

Polechońska,

Gola

et al. 2023

Preprint

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Aims Coleanthus subtilis is a globally rare or threatened, ephemeral therophyte of exposed bottoms of water reservoirs and riverbanks. Nevertheless, it shows a potential to conquer new areas and dominate in phytocoenoses showing morphological differentiation. The main aim of the study was to reveal the intrapopulational variability of the species in relation to sediment characteristics, ecological preferences in microscale, and allelopathic potential in the context of biochemical composition of its biomass. Methods A fishpond with a stable population was selected and data were collected from 107 plots distributed in transects perpendicular to the pond banks; in each plot following parameters were determined: pH, macroelement content in sediments, morphotypes of C. subtilis specimens, species composition of vegetation patches, and ecological indicator values. Collected specimens were used to determine the chemical composition and ecotoxicity. Results Morphological variability of C. subtilis is determined by pH and macroelement content of the sediments. Those parameters and values of ecological indicators (moisture, temperature and light) show a link to the composition of vegetation patches and the phytocoenoses with the high abundance of C. subtilis. Capability of C. subtilis to inhibit germination and growth of other species may account for its prevalence in phytocoenoses. Benzoxazinone derivatives, phenolic compounds and carboxylic acids known to be allelochemicals were identified in the species. Conclusions Morphological variability of C. subtilis is controlled by pH and nutrient content in sediments and species composition of vegetation patches; allelopathic effect found experimentally may be conditioned by chemical compounds determined in its specimens.

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Section: Discussionmentioning

confidence: 99%