Photosynthetic efficiency of Pedunculate oak seedlings under simulated water stress

Photosynthetic performance of seedlings of Quercus robur exposed to short-term water stress in the laboratory conditions was assessed through the method of induced fluorometry. The substrate for seedlings was clayey loam, with the dominant texture fraction made of silt, followed by clay and fine sand, with total porosity 68.2%. Seedlings were separated in two groups: control (C) (soil water regime in pots was maintained at the level of field water capacity) and treated (water-stressed, WS) (soil water regime was maintained in the range of wilting point and lentocapillary capacity). The photosynthetic efficiency was 0.642±0.25 and 0.522±0.024 (WS and C, respectively), which was mostly due to transplantation disturbances and sporadic leaf chlorosis. During the experiment Fv/Fm decreased in both groups (0.551±0.0100 and 0.427±0.018 in C and WS, respectively). Our results showed significant differences between stressed and control group, in regard to both observed parameters (Fv/Fm and T½). Photosynthetic efficiency of pedunculate oak seedlings was significantly affected by short-term water stress, but to a lesser extent than by sufficient watering

Photosynthetic efficiency of Pedunculate oak seedlings under simulated water stress

Photosynthetic performance of seedlings of Quercus robur exposed to short-term water stress in the laboratory conditions was assessed through the method of induced fluorometry. The substrate for seedlings was clayey loam, with the dominant texture fraction made of silt, followed by clay and fine sand, with total porosity 68.2%. Seedlings were separated in two groups: control (C) (soil water regime in pots was maintained at the level of field water capacity) and treated (water-stressed, WS) (soil water regime was maintained in the range of wilting point and lentocapillary capacity). The photosynthetic efficiency was 0.642±0.25 and 0.522±0.024 (WS and C, respectively), which was mostly due to transplantation disturbances and sporadic leaf chlorosis. During the experiment Fv/Fm decreased in both groups (0.551±0.0100 and 0.427±0.018 in C and WS, respectively). Our results showed significant differences between stressed and control group, in regard to both observed parameters (Fv/Fm and T½). Photosynthetic efficiency of pedunculate oak seedlings was significantly affected by short-term water stress, but to a lesser extent than by sufficient watering.U radu je analizirana fotosintetička efikasnost sadnica Quercus robur, izloženih kratkotrajnom vodnom stresu u laboratorijskim uslovima, metodom indukovane fluorimetrije. Kao supstrat za gajenje sadnica korišćena je glinovita ilovača, čiju je dominantnu teksturnu frakciju činio prah, zatim glina pa sitan pesak; totalne poroznosti 68,2%. Sadnice su bile podeljene u dve grupe: S (kontrolna grupa, kod kojih je vodni režim supstrata u saksijama održavan na nivou poljskog vodnog kapaciteta) i WS (grupa izložena vodnom stresu, kod kojih je vodni režim supstrata održavan između tačke venjenja i lentokapilarnog kapaciteta). Fotosintetička efikasnost iznosila je 0,642±0,258 kod kontrolnih sadnica, odnosno 0,522±0,0243 kod izloženih vodnom stresu, što je uglavnom bilo uzrokovano poremećajima izazvanim presađivanjem kao i pojavi hloroze na listovima. Tokom eksperimenta, vrednost Fv/Fm se smanjila u obe grupe sadnica (0,551±0,0100 kod C, odnosno 0,427±0,018 kod WS). U oba merenja utvrđene su statistički značajne razlike između stresirane i kontrolne grupe sadnica u pogledu ispitivanih parametara. Izlaganje sadnica hrasta lužnjaka kratkotrajnom vodnom stresu imalo je značajan uticaj na smanjenje fotosintetičke efikasnosti sadnica, ali u manjoj meri nego izlaganje sadnica obilnom zalivanju.Projekat ministarstva br. TD2005

Sex expression in Serbian dendroflora: A case study of Fraxinus ornus var. angustifolia

Out of a total number of tree species in Serbian flora, 28% are hermaphrodites, 43% are monoecious and 29% are dioecious. The dendroflora appears to have a larger proportion of unisexual than hermaphrodite species. The monoecious system is the dominant unisexual system within the tree species in Serbia. The possible sex differentiation by RAPD markers and Correspondence Analysis was examined in a population of Fraxinus ornus var. angustifolia. On the basis of 6 selected RAPD bands which contribute to the differentiation in frequency between male and hermaphrodite individuals, Correspondence Analysis visualized the following tendency: 20 trees of each variety were separated into two groups that mainly correspond to sexual types. Our results showed that RAPD markers assisted by Correspondence Analysis could be used in identifying male and hermaphrodite individuals in F. ornus varieties.Projekat ministarstva br. P17301

Sex expression in Serbian dendroflora: A case study of Fraxinus ornus var. angustifolia

Out of a total number of tree species in Serbian flora, 28% are hermaphrodites, 43% are monoecious and 29% are dioecious. The dendroflora appears to have a larger proportion of unisexual than hermaphrodite species. The monoecious system is the dominant unisexual system within the tree species in Serbia. The possible sex differentiation by RAPD markers and Correspondence Analysis was examined in a population of Fraxinus ornus var. angustifolia. On the basis of 6 selected RAPD bands which contribute to the differentiation in frequency between male and hermaphrodite individuals, Correspondence Analysis visualized the following tendency: 20 trees of each variety were separated into two groups that mainly correspond to sexual types. Our results showed that RAPD markers assisted by Correspondence Analysis could be used in identifying male and hermaphrodite individuals in F. ornus varieties.Projekat ministarstva br. P17301

Phytoremediation of soil by native plant vascular species as suitable method for re-establishing of ancient ecosystems

Phytoremediation based on the usage of native plant species represents one of the most promising eco-designed methods for revalidation of the main qualitative features of this multifunctional system - fertility, prevention of invasive plant species with the re-establishment of ancient ecosystems. The application of this method is considered a solid base for sustainable development in Serbia and at the global level respectively.Upotreba određenih autohtonih biljnih vrsta u fitoremedijacijiji zemljišta, jedna je od najperspektivnijih ekološki osmišljenih metoda u cilju obnavljanja njegove ključne kvalitativne osobine - plodnosti, sprečavanja širenja invazivnih biljnih vrsta i ponovno uspostavljanje iskonskih ekosistema. Primena ovakve ekološke politike predstavlja čvrst osnov održivog razvoja na području Srbije kao i na globalnom nivou.nul

Phytoremediation of soil by native plant vascular species as suitable method for re-establishing of ancient ecosystems

Phytoremediation based on the usage of native plant species represents one of the most promising eco-designed methods for revalidation of the main qualitative features of this multifunctional system - fertility, prevention of invasive plant species with the re-establishment of ancient ecosystems. The application of this method is considered a solid base for sustainable development in Serbia and at the global level respectively.Upotreba određenih autohtonih biljnih vrsta u fitoremedijacijiji zemljišta, jedna je od najperspektivnijih ekološki osmišljenih metoda u cilju obnavljanja njegove ključne kvalitativne osobine - plodnosti, sprečavanja širenja invazivnih biljnih vrsta i ponovno uspostavljanje iskonskih ekosistema. Primena ovakve ekološke politike predstavlja čvrst osnov održivog razvoja na području Srbije kao i na globalnom nivou.nul

Wild flora and its usage in traditional phytotherapy (Deliblato Sands, Serbia, South East Europe)

9-35<span style="font-size:11.0pt;font-family: " times="" new="" roman";mso-fareast-font-family:"times="" roman";mso-bidi-font-family:="" mangal;letter-spacing:.1pt;mso-ansi-language:en-gb;mso-fareast-language:en-us;="" mso-bidi-language:hi"="" lang="EN-GB">This study reports data on traditional phytotherapy regarding wild flora in the Deliblato Sands, the Special Nature Reserve located in Serbia, South East Europe. Though interviewing local people on identification of plants, plant parts used, methods of remedy preparation and administration, 231 wild plant species of medicinal importance from 172 genera and 62 families, and 101 original preparations were documented. A high degree of consensus (ICF > 0.45) was observed among informants when treating the most common ailments: wound infections, insect/snake bites, blood purification, menstrual and nervous disorders, bronchial/lung catarrhs, cough, cardiac disorders, constipation, diarrhea, urinary infections, rheuma. Most of medicinal plants listed by informants were available, while seven of them were classified as endangered and entered into the system of statutory protection. This study confirmed the extensive indigenous knowledge on medicinal plants, and pointed to some ways of usage that have not been documented in the literature. </span

Phytotherapeutical plants from the Deliblato Sands (Serbia): Traditional pharmacopoeia and implications for conservation

385-400<span style="font-size:11.0pt;font-family: " times="" new="" roman";mso-fareast-font-family:"times="" roman";mso-bidi-font-family:="" mangal;mso-ansi-language:en-gb;mso-fareast-language:en-us;mso-bidi-language:="" hi"="" lang="EN-GB">This paper reports an ethnobotanical study conducted in the Special Nature Reserve ‘Deliblatska peščara’. In total, 283 wild plant species of medicinal importance were recorded, comprised in 70 families and 204 genera. Out of total number of medicinal plants registered in the area, 228 species were used by local residents, and 55 were not recognized by their pharmacological properties. The most used families were Asteraceae, Lamiaceae and Rosaceae and the most used plants were Achillea millefolium, Fragaria sp., <i style="mso-bidi-font-style: normal">Hypericum perforatum, Matricaria chamomilla, Thymus serpyllum, Urtica dioica, all of which had high relative importance. The wild medicinal plants were mostly used for treatment of gastrointestinal (54.9%), urinary (49.8%) and dermatological ailments (46.7%); for respiratory, nervous, osteoarticular, reproductive, cardiovascular and infectious ailments (35.9%, 26.4%, 21.2%, 20.8%, 16.5%, and 16.2%, respectively); for hot and cold syndrome, as preventive agents or against endocrine disorders (15.1%, 10.0%, and 5.2%, respectively).</span

Sex expression in Serbian dendroflora: A case study of Fraxinus ornus var. angustifolia

Out of a total number of tree species in Serbian flora, 28% are hermaphrodites, 43% are monoecious and 29% are dioecious. The dendroflora appears to have a larger proportion of unisexual than hermaphrodite species. The monoecious system is the dominant unisexual system within the tree species in Serbia. The possible sex differentiation by RAPD markers and Correspondence Analysis was examined in a population of Fraxinus ornus var. angustifolia. On the basis of 6 selected RAPD bands which contribute to the differentiation in frequency between male and hermaphrodite individuals, Correspondence Analysis visualized the following tendency: 20 trees of each variety were separated into two groups that mainly correspond to sexual types. Our results showed that RAPD markers assisted by Correspondence Analysis could be used in identifying male and hermaphrodite individuals in F. ornus varieties