LIVIVO - Search results -

Search results

Result 1 - 10 of total 59

Search options

Article ; Online: Alternative electron transport pathways contribute to tolerance to high light stress in lichenized algae.

Beckett, Richard Peter / Roach, Thomas / Minibayeva, Farida / Werth, Silke

2023 Volume 175, Issue 2, Page(s) e13904

Abstract: The photosynthetic apparatus of lichen photobionts has been well-characterized by chlorophyll fluorescence analysis (e.g., by pulse amplitude modulation [PAM]), which provides a proxy of the activity of photosystem II (PSII) and its antenna. However, ... ...

Abstract	The photosynthetic apparatus of lichen photobionts has been well-characterized by chlorophyll fluorescence analysis (e.g., by pulse amplitude modulation [PAM]), which provides a proxy of the activity of photosystem II (PSII) and its antenna. However, such kinetics are unable to directly characterize photosystem I (PSI) activity and the associated alternative electron pathways that may be involved in photoprotection. Instead, PSI can be probed in vivo by near-infrared absorption, measured at the same time as standard chlorophyll fluorescence (e.g., using the WALZ Dual PAM). Here, we used the Dual PAM to investigate cyclic electron flow and photoprotection in a range of mostly temperate lichens sampled from shaded to more open microhabitats. Sun species displayed lower acceptor side limitation of PSI (Y[NA]) early in illumination when compared to shade species, indicative of higher flavodiiron-mediated pseudocyclic electron flow. In response to high irradiance, some lichens accumulate melanin, and Y[NA] was lower and NAD(P)H dehydrogenase (NDH-2)-type cyclic flow was higher in melanised than pale forms. Furthermore, non-photochemical quenching (NPQ) was higher and faster relaxing in shade than sun species, while all lichens displayed high rates of photosynthetic cyclic electron flow. In conclusion, our data suggest that (1) low acceptor side limitation of PSI is important for sun-exposed lichens; (2) NPQ helps shade species tolerate brief exposure to high irradiance; and (3) cyclic electron flow is a prominent feature of lichens regardless of habitat, although NDH-2-type flow is associated with high light acclimation.
MeSH term(s)	Electron Transport ; Light ; Chlorophyll/metabolism ; Fluorescence ; Photosynthesis/physiology ; Photosystem I Protein Complex/metabolism ; Photosystem II Protein Complex/metabolism
Chemical Substances	Chlorophyll (1406-65-1) ; Photosystem I Protein Complex ; Photosystem II Protein Complex
Language	English
Publishing date	2023-03-30
Publishing country	Denmark
Document type	Journal Article
ZDB-ID	2020837-6
ISSN	1399-3054 ; 0031-9317
ISSN (online)	1399-3054
ISSN	0031-9317
DOI	10.1111/ppl.13904
Database	MEDical Literature Analysis and Retrieval System OnLINE

Order via subito

This service is chargeable due to the Delivery terms set by subito. Orders including an article and supplementary material will be classified as separate orders. In these cases, fees will be demanded for each order.

Article ; Online: Unpigmented lichen substances protect lichens against photoinhibition of photosystem II in both the hydrated and desiccated states

Ndhlovu, Nqobile Truelove / Minibayeva, Farida / Beckett, Richard Peter

Acta Physiol Plant. 2022 Dec., v. 44, no. 12 p.123-123

2022

Abstract: Lichen secondary metabolites have been suggested to play a great diversity of roles in lichen biology by acting as UV screens, antimicrobials, herbivore deterrents or allelopathic compounds. However, evidence is also beginning to accumulate that in ... ...

Abstract	Lichen secondary metabolites have been suggested to play a great diversity of roles in lichen biology by acting as UV screens, antimicrobials, herbivore deterrents or allelopathic compounds. However, evidence is also beginning to accumulate that in addition to these roles, even faintly pigmented or unpigmented lichen substances can reduce photoinhibition caused by high levels of photosynthetically active radiation (PAR). Here we used an acetone rinsing technique to remove lichen substances from four common epiphytic Afromontane macro lichens, Parmelia perlata, Ramalina celastri, Usnea dasaea, and Heterodermia leucomela. Results showed that lichen substances can increase the tolerance of lichens to the photoinhibition of PSII of their photobionts when hydrated, apparently by increasing reflectance. However, in the field, lichens may suffer more photoinhibition when fully or partially desiccated. Here we show for the first time that, except for the atranorin-containing Heterodermia, lichen substances can also protect desiccated lichens. Interestingly, removal of substances has no effect on reflectance when lichens are dry, suggesting that lichen substances protect photobionts in other ways.
Keywords	Heterodermia ; Parmelia perlata ; Ramalina ; Usnea ; acetone ; anti-infective agents ; epiphytes ; herbivores ; lichens ; photoinhibition ; photosynthetically active radiation ; photosystem II ; reflectance ; secondary metabolites
Language	English
Dates of publication	2022-12
Size	p. 123.
Publishing place	Springer Berlin Heidelberg
Document type	Article ; Online
ZDB-ID	783102-x
ISSN	1861-1664 ; 0137-5881
ISSN (online)	1861-1664
ISSN	0137-5881
DOI	10.1007/s11738-022-03455-x
Database	NAL-Catalogue (AGRICOLA)

In stock of ZB MED Bonn / Germany

Z 4051: Show issues

Order via subito

Inter-library loan at ZB MED

Your chosen title can be delivered directly to ZB MED Cologne location if you are registered as a user at ZB MED Cologne.

Details ▾
- See ZB MED holdings
- Order with fees

Article ; Online: Class III peroxidase genes in the moss Dicranum scoparium: Identification and abiotic stress induced expression analysis

Onele, Alfred / Mazina, Anastasia / Leksin, Ilya / Chasov, Andrei / Minibayeva, Farida / Beckett, Richard

South African Journal of Botany. 2023 Aug., v. 159 p.72-84

2023

Abstract: Class III peroxidases (POD: EC 1.11.1.7) are classical secretory plant peroxidases belonging to a large multigene family with diverse functions. Members of the POD family have been well-studied and characterized in many plants, including three species of ...

Abstract	Class III peroxidases (POD: EC 1.11.1.7) are classical secretory plant peroxidases belonging to a large multigene family with diverse functions. Members of the POD family have been well-studied and characterized in many plants, including three species of bryophytes, but not from the moss Dicranum scoparium Hedw. Ecologically, D. scoparium is a very important species, which has a widespread distribution throughout the Holarctic. Here we present the first comprehensive report on the POD gene family in D. scoparium, identifying 22 genes encoding PODs (DsPODs), two of which were cloned for verification. All genes were deposited to GenBank under the third-party annotation (Accession numbers TPA: BK061169 – BK061190). Here, we present an in silico study of the physicochemical properties of these proteins. Analyses of conserved domains and subcellular localization suggested that DsPODs have classical peroxidase domain structure; they are secretory proteins and most of them are extracellular. Eight DsPODs highly homologous to Class III peroxidases from the mosses Pohlia nutans and Physcomitrium patens were further microcharacterized. All eight DsPODs possess a haem ligand and active sites necessary for enzymatic activity; they also contained sites for posttranslational modifications. Prediction of secondary structure indicated that these proteins mainly consist of α-helices and random coils. Experiments involving the reverse transcription quantitative real-time polymerase chain reaction (RT-qPCR) showed that DsPOD1, DsPOD2, DsPOD6, and DsPOD8 are differentially upregulated in response to stress. The stresses applied here included CdCl₂, paraquat, unfavorable temperatures, and a hydration-desiccation-rehydration cycle. Our results indicate that Class III PODs contribute to the abiotic stress tolerance of D. scoparium, and specific DsPOD genes may play diverse roles in the response of the moss to stress.
Keywords	Physcomitrium ; abiotic stress ; botany ; computer simulation ; enzyme activity ; ligands ; mosses and liverworts ; multigene family ; paraquat ; peroxidase ; prediction ; quantitative polymerase chain reaction ; reverse transcription ; stress response ; stress tolerance ; Moss ; Class III peroxidase ; Gene identification ; Desiccation ; Temperature stress ; CDD ; CDS ; DsPODs ; GRAVY ; ORFs ; ROS ; RWC ; SRA
Language	English
Dates of publication	2023-08
Size	p. 72-84.
Publishing place	Elsevier B.V.
Document type	Article ; Online
ZDB-ID	2126918-X
ISSN	0254-6299
ISSN	0254-6299
DOI	10.1016/j.sajb.2023.05.048
Database	NAL-Catalogue (AGRICOLA)

Order via subito

Article ; Online: Alternative electron transport pathways contribute to tolerance to high light stress in lichenized algae

Beckett, Richard Peter / Roach, Thomas / Minibayeva, Farida / Werth, Silke

Physiologia Plantarum. 2023 Mar., v. 175, no. 2 p.e13904-

2023

Abstract: The photosynthetic apparatus of lichen photobionts has been well‐characterized by chlorophyll fluorescence analysis (e.g., by pulse amplitude modulation [PAM]), which provides a proxy of the activity of photosystem II (PSII) and its antenna. However, ... ...

Abstract	The photosynthetic apparatus of lichen photobionts has been well‐characterized by chlorophyll fluorescence analysis (e.g., by pulse amplitude modulation [PAM]), which provides a proxy of the activity of photosystem II (PSII) and its antenna. However, such kinetics are unable to directly characterize photosystem I (PSI) activity and the associated alternative electron pathways that may be involved in photoprotection. Instead, PSI can be probed in vivo by near‐infrared absorption, measured at the same time as standard chlorophyll fluorescence (e.g., using the WALZ Dual PAM). Here, we used the Dual PAM to investigate cyclic electron flow and photoprotection in a range of mostly temperate lichens sampled from shaded to more open microhabitats. Sun species displayed lower acceptor side limitation of PSI (Y[NA]) early in illumination when compared to shade species, indicative of higher flavodiiron‐mediated pseudocyclic electron flow. In response to high irradiance, some lichens accumulate melanin, and Y[NA] was lower and NAD(P)H dehydrogenase (NDH‐2)‐type cyclic flow was higher in melanised than pale forms. Furthermore, non‐photochemical quenching (NPQ) was higher and faster relaxing in shade than sun species, while all lichens displayed high rates of photosynthetic cyclic electron flow. In conclusion, our data suggest that (1) low acceptor side limitation of PSI is important for sun‐exposed lichens; (2) NPQ helps shade species tolerate brief exposure to high irradiance; and (3) cyclic electron flow is a prominent feature of lichens regardless of habitat, although NDH‐2‐type flow is associated with high light acclimation.
Keywords	absorption ; acclimation ; chlorophyll ; electron transfer ; habitats ; lichens ; light intensity ; lighting ; melanin ; melanization ; oxidoreductases ; photosystem II ; radiation resistance
Language	English
Dates of publication	2023-03
Publishing place	Blackwell Publishing Ltd
Document type	Article ; Online
Note	JOURNAL ARTICLE
ZDB-ID	2020837-6
ISSN	1399-3054 ; 0031-9317
ISSN (online)	1399-3054
ISSN	0031-9317
DOI	10.1111/ppl.13904
Database	NAL-Catalogue (AGRICOLA)

Order via subito

Article: DsDBF1

Onele, Alfred O / Mazina, Anastasia B / Leksin, Ilya Y / Minibayeva, Farida V

Life (Basel, Switzerland)

2022 Volume 13, Issue 1

Abstract: Plant dehydration-responsive element binding (DREB) transcription factors (TFs) play important roles during stress tolerance by regulating the expression of numerous genes involved in stresses. DREB TFs have been extensively studied in a variety of ... ...

Abstract	Plant dehydration-responsive element binding (DREB) transcription factors (TFs) play important roles during stress tolerance by regulating the expression of numerous genes involved in stresses. DREB TFs have been extensively studied in a variety of angiosperms and bryophytes. To date, no information on the identification and characterization of DREB TFs in
Language	English
Publishing date	2022-12-28
Publishing country	Switzerland
Document type	Journal Article
ZDB-ID	2662250-6
ISSN	2075-1729
ISSN	2075-1729
DOI	10.3390/life13010090
Database	MEDical Literature Analysis and Retrieval System OnLINE

Order via subito

Article: Melanisation in Boreal Lichens Is Accompanied by Variable Changes in Non-Photochemical Quenching.

Ndhlovu, Nqobile Truelove / Solhaug, Knut Asbjørn / Minibayeva, Farida / Beckett, Richard Peter

Plants (Basel, Switzerland)

2022 Volume 11, Issue 20

Abstract: Lichens often grow in microhabitats where they absorb more light than they can use for fixing carbon, and this excess energy can cause the formation of harmful reactive oxygen species (ROS). Lichen mycobionts can reduce ROS formation by synthesizing ... ...

Abstract	Lichens often grow in microhabitats where they absorb more light than they can use for fixing carbon, and this excess energy can cause the formation of harmful reactive oxygen species (ROS). Lichen mycobionts can reduce ROS formation by synthesizing light-screening pigments such as melanins in the upper cortex, while the photobionts can dissipate excess energy radiationlessly using non-photochemical quenching (NPQ). An inherent problem with using fluorimetry techniques to compare NPQ in pale and melanised thalli is that NPQ is normally measured through a variously pigmented upper cortex. Here we used a dissection technique to remove the lower cortices and medullas of
Language	English
Publishing date	2022-10-15
Publishing country	Switzerland
Document type	Journal Article
ZDB-ID	2704341-1
ISSN	2223-7747
ISSN	2223-7747
DOI	10.3390/plants11202726
Database	MEDical Literature Analysis and Retrieval System OnLINE

Order via subito

Article ; Online: Melanins from the Lichens

Rassabina, Anna / Khabibrakhmanova, Venera / Babaev, Vasily / Daminova, Amina / Minibayeva, Farida

International journal of molecular sciences

2022 Volume 23, Issue 24

Abstract: Synthetic dyes are widely used in the industry; they are chemically stable, difficult to neutralize, and therefore they are a threat to the environment when released into wastewaters. The dyes have a significant impact on plant performance by impairing ... ...

Abstract	Synthetic dyes are widely used in the industry; they are chemically stable, difficult to neutralize, and therefore they are a threat to the environment when released into wastewaters. The dyes have a significant impact on plant performance by impairing photosynthesis, inhibiting growth, and entering the food chain and may finally result in the toxicity, mutagenicity and carcinogenicity of food products. Implementation of the dark piment melanin for the adsorption of the synthetic dyes is a new ecologically friendly approach for bioremediation. The aim of the present work was to study the physico-chemical characteristics of melanins from the lichens
Language	English
Publishing date	2022-12-09
Publishing country	Switzerland
Document type	Journal Article
ZDB-ID	2019364-6
ISSN	1422-0067 ; 1422-0067 ; 1661-6596
ISSN (online)	1422-0067
ISSN	1422-0067 ; 1661-6596
DOI	10.3390/ijms232415605
Database	MEDical Literature Analysis and Retrieval System OnLINE

Order via subito

Article: Nitric Oxide Induces Autophagy in

Minibayeva, Farida / Mazina, Anastasia / Gazizova, Natalia / Dmitrieva, Svetlana / Ponomareva, Anastasia / Rakhmatullina, Daniya

Antioxidants (Basel, Switzerland)

2023 Volume 12, Issue 9

Abstract: Autophagy is a highly conserved process that degrades damaged macromolecules and organelles. Unlike animals, only scant information is available regarding nitric oxide (NO)-induced autophagy in plants. Such lack of information prompted us to study the ... ...

Abstract	Autophagy is a highly conserved process that degrades damaged macromolecules and organelles. Unlike animals, only scant information is available regarding nitric oxide (NO)-induced autophagy in plants. Such lack of information prompted us to study the roles of the NO donors' nitrate, nitrite, and sodium nitroprusside in this catabolic process in wheat roots. Furthermore, spermine, a polyamine that is found in all eukaryotic cells, was also tested as a physiological NO donor. Here, we show that in wheat roots, NO donors and spermine can trigger autophagy, with NO and reactive oxygen species (ROS) playing signaling roles based on the visualization of autophagosomes, analyses of the levels of NO, ROS, mitochondrial activity, and the expression of autophagic (
Language	English
Publishing date	2023-08-22
Publishing country	Switzerland
Document type	Journal Article
ZDB-ID	2704216-9
ISSN	2076-3921
ISSN	2076-3921
DOI	10.3390/antiox12091655
Database	MEDical Literature Analysis and Retrieval System OnLINE

Order via subito

Article: Topography of UV-Melanized Thalli of

Daminova, Amina G / Rassabina, Anna E / Khabibrakhmanova, Venera R / Beckett, Richard P / Minibayeva, Farida V

Plants (Basel, Switzerland)

2023 Volume 12, Issue 14

Abstract: Lichens are unique extremophilic organisms due to their phenomenal resistance to adverse environmental factors, including ultraviolet (UV) irradiation. Melanization plays a special role in the protection of lichens from UV-B stress. In the present study, ...

Abstract	Lichens are unique extremophilic organisms due to their phenomenal resistance to adverse environmental factors, including ultraviolet (UV) irradiation. Melanization plays a special role in the protection of lichens from UV-B stress. In the present study, we analyzed the binding of melanins with the components of cell walls of the mycobiont of the upper cortex in the melanized lichen thalli
Language	English
Publishing date	2023-07-12
Publishing country	Switzerland
Document type	Journal Article
ZDB-ID	2704341-1
ISSN	2223-7747
ISSN	2223-7747
DOI	10.3390/plants12142627
Database	MEDical Literature Analysis and Retrieval System OnLINE

Order via subito

Article: S-Nitrosylated Proteins Involved in Autophagy in

Mazina, Anastasia / Shumilina, Julia / Gazizova, Natalia / Repkin, Egor / Frolov, Andrej / Minibayeva, Farida

Life (Basel, Switzerland)

2023 Volume 13, Issue 10

Abstract: Autophagy is a highly conserved catabolic process in eukaryotic cells. Reactive nitrogen species play roles as inductors and signaling molecules of autophagy. A key mechanism of NO-mediated signaling is S-nitrosylation, a post-translational modification ( ...

Abstract	Autophagy is a highly conserved catabolic process in eukaryotic cells. Reactive nitrogen species play roles as inductors and signaling molecules of autophagy. A key mechanism of NO-mediated signaling is S-nitrosylation, a post-translational modification (PTM) of proteins at cysteine residues. In the present work, we analyzed the patterns of protein S-nitrosylation during the induction of autophagy in
Language	English
Publishing date	2023-10-08
Publishing country	Switzerland
Document type	Journal Article
ZDB-ID	2662250-6
ISSN	2075-1729
ISSN	2075-1729
DOI	10.3390/life13102024
Database	MEDical Literature Analysis and Retrieval System OnLINE

Order via subito

To top

More links

Kategorien

Order via subito

More links

Kategorien

In stock of ZB MED Bonn / Germany

Order via subito

Inter-library loan at ZB MED

More links

Kategorien

Order via subito

More links

Kategorien

Order via subito

More links

Kategorien

Order via subito

More links

Kategorien

Order via subito

More links

Kategorien

Order via subito

More links

Kategorien

Order via subito

More links

Kategorien

Order via subito

More links

Kategorien

Order via subito