Autotoxicity of Phthalate Esters in Tobacco Root Exudates: Effects on Seed Germination and Seedling Growth

Deng, Jiajun; Shixiang, Zhang; Hu, Jiwei; Zhang, Yanling; Jiao, Jiaguo; Hu, Feng; Li, Huixin

doi:10.1016/s1002-0160(17)60374-6

Cited by 34 publications

(20 citation statements)

References 46 publications

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“…Almost all of allelopathic substances are secondary metabolic products, and autotoxic allelopathy caused by allelochemicals is the main reason for continuous‐cropping obstacle (Ren et al, ). Generally, tobacco more easily generates autotoxic allelopathy than other plants (Deng et al, ; Farooq, Hussain, Wakeel, & Cheema, ). For example, the extracts of tobacco rhizosphere soil significantly inhibit tobacco seed germination and negatively influence plant growth and development (Ren et al, ).…”

Section: Introductionmentioning

confidence: 99%

Continuous‐cropping tobacco caused variance of chemical properties and structure of bacterial network in soils

et al. 2018

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Continuous cropping of the same crop leads to land degradation. This is also called the continuous-cropping obstacle. Here, we investigated how long-term continuous cropping of tobacco influences soil biochemical properties and bacterial networks in the mountain lands of China. Two different fields were sampled: one with 25 years of continuous cropping tobacco and one with noncontinuous cropping tobacco. Soil chemical and biological properties were measured including available phosphorus and potassium, soil organic matter, pH, alkali-hydrolysable nitrogen, micronutrients contents, and activity of urease, catalase, invertase, and phosphatase as well as tobacco agronomic characteristics. Bacterial communities of the two different soils were sequenced by metabarcoding of the 16S ribosomal RNA, and, with these data, network analysis was done. Soil chemical properties and tobacco agronomical properties were negatively affected by the continuous-cropping obstacle, and this treatment has a less complex network (less modules, nodes, and connectivity) than the soil with noncontinuous cropping treatment. For continuous cropping, there were less generalists, which were key species that connect network, than noncontinuous cropping.Moreover, the taxonomic composition of bacterial network was different in the two different treatments. In the continuous-cropping network, 40% nodes had negative interactions, suggesting that more competition or antagonism existed among bacterial species. It concluded that continuous cropping has a detrimental effect on soil chemical and that the bacterial network properties under continuous cropping are more sensitive to soil variables (so more unstable and inefficient) because there are less bacterial species that interact each other and this is due to limited nutrients or excessive toxic nutrient.This is an open access article under the terms of the Creative Commons Attribution License, which permits use, distribution and reproduction in any medium, provided the original work is properly cited.

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Section: Introductionmentioning

confidence: 99%

Continuous‐cropping tobacco caused variance of chemical properties and structure of bacterial network in soils

et al. 2018

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“…In addition, Artemisia halodendron litter had a minimal induction effect on seedling growth at high concentrations (100 and 200 g mL −1 ), indicating that the high concentration of A. halodendron litter strongly inhibited seed germination and seedling establishment (Luo et al, 2017). The composition of tree species and the concentration of stimulant containing different quantities of allelochemicals affects the process of seed germination and seedling growth and thus the growth condition of A. pedunculata (Deng et al, 2017). The allelopathic effect is strongly related to the allelochemicals of donor and plant-environment interactions (Blanco, 2007).…”

Section: Discussionmentioning

confidence: 99%

“…The composition of tree species and the concentration of stimulant containing different quantities of allelochemicals affects the process of seed germination and seedling growth and thus the growth condition of A. pedunculata ( Deng et al, 2017 ). The allelopathic effect is strongly related to the allelochemicals of donor and plant-environment interactions ( Blanco, 2007 ).…”

Section: Discussionmentioning

confidence: 99%

The Effects of Leaf Extracts of Four Tree Species on Amygdalus pedunculata Seedlings Growth

Wang

Zhang

Di³

et al. 2021

Front. Plant Sci.

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Vegetation reconstruction is an urgent problem in fragile environment like coal mine subsidence areas. Amygdalus pedunculata is an important eco-economic shrub species that promotes wind prevention, sand fixation as well as soil and water conservation. The natural regeneration of pure Amygdalus pedunculata forests is difficult to achieve because of its low seed germination rate and weak seedling growth. A stereo-complex ecosystem could potentially promote the germination and seedling growth of A. pedunculata and establish a steady mixed plantation consisting of trees and shrubs. Here, laboratory and pot experiments were conducted to assess the effect of four tree species on morphological and physiological indexes of A. pedunculata. The laboratory experiment showed that A. pedunculata seed germination and seedling growth from Yuyang County (YC-1) and Shenmu County (SC-6) were higher when plants were treated with the aqueous leaf extracts of Pinus sylvestris, Broussonetia papyrifera, and Pinus tabulaeformis compared with Populus simonii at concentrations of 2.5% (E2.5) and 5% (E5). Furthermore, the donor leaf extract was more sensitive to YC-1 than to SC-6. The pot experiment showed that the E2.5 and E5 treatments with the aqueous leaf extracts on the three tree species had strong promoting effects of seedling length, root length, seedling fresh weight, root fresh weight, and ground diameter for YC-1. The activity of catalase of A. pedunculata seedlings first increased and then decreased, while the activity of peroxidase, superoxide dismutase, roots, and the contents of soluble protein and chlorophyll decreased; the opposite patterns were observed for malondialdehyde, soluble sugar, cell membrane permeability, and proline were the opposite. Synthetical allelopathic effect index values of the leaf extracts of the three species on YC-1 were as follows: P. sylvestris > B. papyrifera > P. tabulaeformis (E2.5 to E20). Therefore, P. sylvestris and B. papyrifera could be used to promote the growth of A. pedunculata seedlings as well as for the construction of mixed plantations in coal mine degradation areas. Generally, this study provides new insight into the creation of stereo-complex ecosystems (P. sylvestris + A. pedunculata and B. papyrifera + A. pedunculata) in arid fragile environment.

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“…Compound campesterol shows various degrees of allelopathic activity on common weeds, such as red chilli and legumes 53 – 55 . Compound dibutyl phthalate has certain allelotoxicity to tobacco seedlings and the growth of Microcystis aeruginosa 56 , 57 .…”

Section: Discussionmentioning

confidence: 99%

Identify potential allelochemicals from Humulus scandens (Lour.) Merr. root extracts that induce allelopathy on Alternanthera philoxeroides (Mart.) Griseb.

Wang

Liu

Zhu

et al. 2021

Sci Rep

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Although it is well-documented that invasion of invasive plants is promoted with allelopathic effects by inhibiting the growth and phenotypic performance of native plants, little is known conversely. In this study, the allelopathy effects of a native plant, Humulus scandens (Lour.) Merr., on a typical invasive species Alternanthera philoxeroides (Mart.) Griseb., was investigated by exposing A. philoxeroides seedlings to three chemical solvent extracts (i.e., petroleum ether extract (PE), ethyl acetate extract (EE), and n-butanol extract (NE) of H. scandens root (HR). The three chemical extracts inhibited the growth, stem length, node number, leaf number, leaf area, and root number, and increased malondialdehyde (MDA) content of A. philoxeroides seedlings, which indicated that the extracts inhibited the plant growth by damaging the membrane system of leaves. And the synthetical effect of allelopathy (SE) index indicated that EE had the greatest inhibition on the growth of A. philoxeroides. Fifty compounds were identified from the three extracts of HR using GC–MS analysis, among which 5 compounds (dibutyl phthalate, stigmasta-3,5-diene, 2,6-Di-tert-butylphenol campesterol, and neophytadiene) were identified from H. scandens root extracts for the first time. And n-hexadecanoic acid exists in all three extracts. The findings of the present study provide a novel method to potentially control the invasion of A. philoxeroides. However, field monitoring under natural conditions would be necessary to confirm in practice the results obtained with the bioassays.

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Autotoxicity of Phthalate Esters in Tobacco Root Exudates: Effects on Seed Germination and Seedling Growth

Cited by 34 publications

References 46 publications

Continuous‐cropping tobacco caused variance of chemical properties and structure of bacterial network in soils

Continuous‐cropping tobacco caused variance of chemical properties and structure of bacterial network in soils

The Effects of Leaf Extracts of Four Tree Species on Amygdalus pedunculata Seedlings Growth

Identify potential allelochemicals from Humulus scandens (Lour.) Merr. root extracts that induce allelopathy on Alternanthera philoxeroides (Mart.) Griseb.

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