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Recent Submissions
Influence of Camelina crops on soil CO2 emissions
(Plovdiv University Press "Paisii Hilendarski", 2025-02-03) Petrova, Slaveya; Stanchev, Georgi; Marcheva, Marina; Popov, Vladislav
The Green Deal poses different challenges for EU agriculture, and this production will cost more and will be reflected on the global market once agriculture is included in the emissions trading system. Sustainable land management will be crucial to achieving the EU's climate neutrality target by 2050, as it will increase the amount of carbon captured and stored in plants
and soils. Agriculture’s role in carbon sequestration is most closely linked to soil as a carbon sink. Soils have the potential to act as significant carbon sinks, storing carbon that would otherwise be released into the atmosphere as CO2. Through practices such as cover crops, reduced tillage, and organic farming, farmers can improve soil carbon sequestration, contributing to climate mitigation efforts. The aim of the present study was to track the dynamics of soil CO2 emissions during the vegetation of Camelina in different intercropping systems and, on this basis, to evaluate the possibilities for sustainable management of carbon in the soil. After the three-year studies, we can recommend the use of Camelina as monocultures and especially in mixed crops with legumes as a step towards sustainable management of CO2 emissions and towards the so-called carbon agriculture. This approach has the additional
advantage of biologically nourishing the soil with nitrogen, as well as creating more favorable conditions for the development of the soil microbiome.
Analysis of medicinal plants from the regions of the Strandzha mountain and southern Black Sea Coast, Bulgaria
(Plovdiv University Press "Paisii Hilendarski", 2025-05-07) Todorov, Krasimir; Stoyanov, Plamen; Mladenov, Rumen; Gyuzeleva, Donika; Radoukova, Tzenka; Selyami, Dzhansu; Zhelyazkova, Simona; Mladenova, Tsevetelina
This article presents summarized information about the medicinal plants distributed on the territory of Strandzha mountain and the southern Black Sea coast, Bulgaria. According to literature data, 252 medicinal taxa are found on the territory of the two floristic regions, 218 of which are included in the Medicinal Plants Act. All species included in the list are characterized by: biological type, life form, and floral element. 59 plants have conservation status, representing 23.4% of the established species composition. According to the Red List of Higher Plants in Bulgaria and the Red Book of the Republic of Bulgaria, the following species are critically
endangered (CR): Arbutus unedo L. and Sideritis syriaca L. Four Balkan endemics have been identified - Achillea clypeolata Sm., Opopanax chironius (L.) W. D. J. Koch subsp. bulgaricum (Velen.) Andreev, Sempervivum leucanthum Pančič, and Thymus longedentatus (Deg. & Urum.) Ronn.
First record of chestnut blight on Quercus petraea (Fagaceae) in Bulgaria
(Plovdiv University Press "Paisii Hilendarski", 2025-03-18) Filipova, Eva; Manova, Vasilissa; Bonchev, Georgi; Boycheva, Irina; Georgieva, Margarita
Chestnut blight is one of the most destructive diseases on species of Castanea genus (Fagaceae). The causal agent of the disease is the ascomycete fungus Cryphonectria parasitica (Valsaceae). In the period 2018-2020, chestnut blight was found on both European (sweet) chestnut (Castanea sativa) and sessile oak (Quercus petraea) trees in mixed chestnut-oak stands planted in the region of State Forest Enterprise (SFE) Simitli (Pirin Mt.) and SFE Petrich (Belasitsa Mt.). The present study provides new data on the first detection of damage caused by Cryphonectria parasitica on Quercus petraea plantations in southwestern Bulgaria. The frequency and impact of the disease, the variety of vegetative compatibility types of the pathogen, as well as the molecular identification and mating type of the pathogen from oak samples were characterized.
Morphometric variation of two endangered Bulgarian medicinal plant species Alchemilla mollis (Buser) Rothm. and Alchemilla achtarowii Pawł. (Rosaceae)
(Plovdiv University Press "Paisii Hilendarski", 2025-03-21) Gavrilova, Anna; Gavrilov, Genadi; Vitkova, Antonia
Morphometric variation of the protected in Bulgaria species Alchemilla mollis (Buser) Rothm. and A. achtarowii Pawł. (Rosaceae) was investigated based on ten morphometric characters under in-situ and ex-situ environmental conditions. Plant materials originating from Bulgarian localities of A. mollis and A. achtarowii in Central Balkan Mountains (1100-2000 m a.s.l.) were compared to others, harvested from experimental live collection, grown in Sofia (570 m a.s.l.). Abiotic factors like water regime, and temperature had strong influence on the performance of both species in-situ and ex-situ. A distinctive difference in some morphometric characters of A. mollis in nature over the past 40 years was found. When exposed to prolonged temperature and drought stress A. achtarowii showed considerable variability regarding flower diameter and epicalyx indentation. The presented study should be used as a practical example
of how some high mountain apomictic species react to changes in the environment and what are the resulting implications related to their traditional taxonomic treatment and conservation.
Comparative leaf epidermis and molecular analyses of Micromeria dalmatica Bentham and Clinopodium vulgare L. from Bulgaria
(Plovdiv University Press "Paisii Hilendarski", 2025-05-08) Mladenova, Tsvetelina; Naimov, Samir; Apostolova, Elena; Stoyanov, Plamen; Mladenov, Rumen; Bivolarska, Anelia; Raycheva, Tsvetanka; Gyuzeleva, Donika; Pechanska, Adriana; Balabanova, Rada; Kuzdova, Demetra; Todorov, Krasimir
The volume and number of taxa within the genus Micromeria have changed over the past decades based on several molecular genetic studies. In the Bulgarian flora, no revision has been conducted, and the boundaries of the genus remain unclear. Molecular studies have shown that members of the section Pseudomelissa within the genus Micromeria are more closely related to the genus Clinopodium than to the typical section Micromeria. In the present study, anatomical investigations of the leaf epidermis were carried out, and the molecular genetic structure of Micromeria dalmatica was determined. Its phylogenetic relationship with Clinopodium vulgare was
established based on sequences in the ITS1 and tRNA-Leu regions