Allelopathic Compounds as Oxidative Stress Agents: Yes or NO

Gniazdowska, Agnieszka; Krasuska, Urszula; Andrzejczak, Olga; Sołtys, Dorota

doi:10.1007/978-3-319-10079-1_8

Cited by 29 publications

(28 citation statements)

References 95 publications

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“…According to Gniazdowska et al . (), any change in redox homeostasis of the symplast and apoplast caused by interaction with allelochemicals has a direct effect on cell development, either by damage to the membrane structure or by changes in cell wall extension, which consequently affects plant growth. The evidence of increased overall tolerance of H .…”

Section: Discussionmentioning

confidence: 99%

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Phytotoxic potential of Senna occidentalis (L.) Link extracts on seed germination and oxidative stress of Ipê seedlings

Silva

Vieira

2019

Plant Biol J

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Senna occidentalis is an invasive plant producing a series of allelochemicals that might inhibit the development of other plants. The objective of this study was to assess the phytotoxic effect of S. occidentalis extracts on the germination, development and antioxidant defence of the native species Tabebuia chrysotricha, T. pentaphylla, T. roseoalba and Handroanthus impetiginosus (Ipê species).• We evaluated the effects of chemicals extracted from S. occidentalis on the germination rate, germination speed index (GSI) and biometric parameters of the test species under controlled conditions. The effect of the extracts on the pigment content, amount of H 2 O 2 and malondialdehyde (MDA), and the activity of the antioxidant enzymes in roots and leaves were also tested.• Alkaloids, coumarins, phenols, saponins, free steroids and condensed tannins were present in all extracts of S. occidentalis, while catechins were present only in leaf and stem extracts. Stem and root extracts caused a growth reduction in all Ipê species and total inhibition of seed germination in T. chrysotricha and T. roseoalba. All target species showed an increase in H 2 O 2 and MDA in radicles and leaves. Oxidative stress contributed strongly to the morphological changes, such as seed blackening, thinning and darkening of radicle tips and reduction of biomass allocation in all Ipê species.

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Section: Discussionmentioning

confidence: 99%

“…), ATP synthesis, phytohormone metabolism and the production of reactive oxygen species (ROS) (Gniazdowska et al . ). The role of ROS as signallers of stress and oxidative damage can be intensified due to the action of allelochemicals, causing severe injury to organelles such as chloroplasts, peroxisomes and mitochondria (Coelho et al .…”

Section: Introductionmentioning

confidence: 97%

Phytotoxic potential of Senna occidentalis (L.) Link extracts on seed germination and oxidative stress of Ipê seedlings

Silva

Vieira

2019

Plant Biol J

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“…Common physiological reaction to abiotic or biotic stressors is ROS/RNS burst (imbalance in ROS/RNS production and scavenging; Groß et al, 2013 ). It has also been noticed as secondary mode of action of some allelochemicals or phytotoxins ( Gniazdowska et al, 2015 ).…”

Section: Discussionmentioning

confidence: 99%

“…Supplementation with CAN stimulated PAO activity in tomato roots, especially after 24 h of the culture ( Figure 4 ), suggesting involvement of CAN in PAs metabolism. PAs take part in plant responses to various stress factors, including allelochemicals ( Kusano et al, 2008 ; Gniazdowska et al, 2015 ). 2(3H)-benzoxazolinone decreased PAs content in roots of lettuce ( Lactuca sativa L.; Sánchez-Moreiras and Reigosa, 2005 ).…”

Section: Discussionmentioning

confidence: 99%

Canavanine Alters ROS/RNS Level and Leads to Post-translational Modification of Proteins in Roots of Tomato Seedlings

et al. 2016

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Canavanine (CAN), a structural analog of arginine (Arg), is used as a selective inhibitor of inducible NOS in mammals. CAN is incorporated into proteins’ structure in the place of Arg, leading to the formation of aberrant compounds. This non-protein amino acid is found in legumes, e.g., Canavalia ensiformis (L.) DC. or Sutherlandia frutescens (L.) R.Br. and acts as a strong toxin against herbivores or plants. Tomato (Solanum lycopersicum L.) seedlings were treated for 24–72 h with CAN (10 or 50 μM) inhibiting root growth by 50 or 100%, without lethal effect. We determined ROS level/production in root extracts, fluorescence of DAF-FM and APF derivatives corresponding to RNS level in roots of tomato seedlings and linked CAN-induced restriction of root growth to the post-translational modifications (PTMs) of proteins: carbonylation and nitration. Both PTMs are stable markers of nitro-oxidative stress, regarded as the plant’s secondary response to phytotoxins. CAN enhanced H2O2 content and superoxide radicals generation in extracts of tomato roots and stimulated formation of protein carbonyl groups. An elevated level of carbonylated proteins was characteristic for the plants after 72 h of the culture, mainly for the roots exposed to 10 μM CAN. The proteolytic activity was stimulated by tested non-protein amino acid. CAN treatment led to decline of fluorescence of DAF-FM derivatives, and transiently stimulated fluorescence of APF derivatives. Short-term exposure of tomato seedlings to CAN lowered the protein nitration level. Activity of peroxidase, polyamine oxidase and NADPH oxidase, enzymes acting as modulators of H2O2 concentration and governing root architecture and growth were determined. Activities of all enzymes were stimulated by CAN, but no strict CAN concentration dependence was observed. We conclude, that although CAN treatment led to a decline in the nitric oxide level, PTMs observed in roots of plants exposed to CAN are linked rather to the formation of carbonyl groups than to nitration, and are detected particularly after 24 h. Thus, oxidative stress and oxidative modifications of proteins seems to be of significant importance in the rapid response of plants to CAN.

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“…Phytotoxins are known as stress inducers in acceptor plants, and thus can modulate reactive oxygen species (ROS) metabolism [ 31 ]. Burst of superoxide anion (O 2 - .…”

Section: Introductionmentioning

confidence: 99%

Loss of Gravitropism in Farnesene-Treated Arabidopsis Is Due to Microtubule Malformations Related to Hormonal and ROS Unbalance

et al. 2016

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Mode of action of farnesene, a volatile sesquiterpene commonly found in the essential oils of several plants, was deeply studied on the model species Arabidopsis thaliana. The effects of farnesene on the Arabidopsis root morphology were evaluated by different microscopic techniques. As well, microtubules immunolabeling, phytohormone measurements and ROS staining helped us to elucidate the single or multi-modes of action of this sesquiterpene on plant metabolism. Farnesene-treated roots showed a strong growth inhibition and marked modifications on morphology, important tissue alterations, cellular damages and anisotropic growth. Left-handed growth of farnesene-treated roots, reverted by taxol (a known microtubule stabilizer), was related to microtubule condensation and disorganization. As well, the inhibition of primary root growth, lateral root number, lateral root length, and both root hairs length and density could be explained by the strong increment in ethylene production and auxin content detected in farnesene-treated seedlings. Microtubule alteration and hormonal unbalance appear as important components in the mode of action of farnesene and confirm the strong phytotoxic potential of this sesquiterpene.

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Allelopathic Compounds as Oxidative Stress Agents: Yes or NO

Cited by 29 publications

References 95 publications

Phytotoxic potential of Senna occidentalis (L.) Link extracts on seed germination and oxidative stress of Ipê seedlings

Phytotoxic potential of Senna occidentalis (L.) Link extracts on seed germination and oxidative stress of Ipê seedlings

Canavanine Alters ROS/RNS Level and Leads to Post-translational Modification of Proteins in Roots of Tomato Seedlings

Loss of Gravitropism in Farnesene-Treated Arabidopsis Is Due to Microtubule Malformations Related to Hormonal and ROS Unbalance

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