Search results for "Seedling"
showing 10 items of 110 documents
Phytotoxic Activities of Mediterranean Essential Oils
2010
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Effects of arbuscular mycorrhizal fungi and maternal plant sex on seed germination and early plant establishment.
2015
Premise of the study: Arbuscular mycorrhizal fungi usually enhance overall plant performance, yet their effects on seed germi- nation and early plant establishment, crucial steps in plant cycles, are generally overlooked. In gynodioecious species, sexual dimorphism in these traits has been reported, with females producing seeds that germinate at a faster rate than seeds from hermaphrodites. • Methods: Using the gynodioecious plant Geranium sylvaticum, I investigated in a greenhouse experiment whether the presence of arbuscular mycorrhizal spores affects seed germination and early plant establishment, examining at the same time whether the sex of the mother producing the seeds also influence…
EVALUATION OF SEED GERMINATION AND SEEDLING GROWTH OF SICILIAN AND INTERNATIONAL LOQUAT CULTIVARS
2015
Loquat (Eriobotrya japonica, Lindl) is commonly grafted on seedling rootstocks in Sicilian orchards. Seedling production is characterized by low germination percentage and velocity and slow plant growth. The aim of this study was to evaluate loquat seed germination of Sicilian and international cultivars. Seeds from 11 cultivars (Algerie, Bianco Dolce, BRT20, Claudia, Fiore, Golden Nugget, La Mantia, Magdal, Mercenò, Peluche, Tanaka) were collected from mature fruits in commercial orchards. Part of the seeds received a pretreatment with 1% HCl for 24 h. Germination data were collected at 30 days from sowing. Ninety days after germination, plants were transplanted into 2-L pots. The Sicilian…
Microwave effects on germination and growth of radish (Raphanus sativus L.) seedlings
2002
Germination of radish seeds was delayed and reduced by low-power microwave exposure at 10.5 and 12.5 GHz. Irradiation decreased also hypocotyl growth rate. These effects were increased by rising of the microwave power and by the vertically polarised electromagnetic field. When the irradiation was suspended the seedling growth recovered.
Increasing tree survival to facilitate the conversion of conventional systems to agroforestry systems using plant growing aids and plant-plant facili…
2022
Several global commitments have established a compromise to greatly increase the presence of trees in agricultural lands, fostering therefore the adoption of agroforestry systems and the destination of some areas for reforestation. Such tasks are challenging, particularly under the current climate change scenarios, and several studies have demonstrated a high risk of seedling mortality under harsh and extremely variable environmental conditions, calling for solutions that must increase the success and reduce the costs of growing a tree. In this study, inside the project LIFE Desert Adapt, we tested the effects of different types of growing aids such as shelters, mulching and innovative meth…
Nursery and field evaluation of eggplant grafted onto unrooted cuttings of Solanum torvum Sw.
2014
Abstract Solanum torvum is the eggplant ( Solanum melongena ) relative most commonly used for grafting even if the nursery production of eggplants grafted onto this rootstock has some issues related to its long, irregular and erratic germination and slow growth and development of seedlings. Unrooted cuttings harvested from stock plants could be an alternative propagation material to obtain S. torvum rootstocks and might allow to overcome nursery production issues for eggplant. The aim of this work was to evaluate eggplant suitability to be propagated by unrooted grafted cuttings using S. torvum as rootstock and the influence of this propagation technique on plant yield and fruit quality. A …
Broomrape weeds. Underground mechanisms of parasitism and associated strategies for their control: a review
2016
prod 2018-285d SPE GESTAD Agrosup INRA CT?; International audience; Broomrapes are plant-parasitic weeds which constitute one of the most difficult-to-control of all biotic constraints that affect crops in Mediterranean, central and eastern Europe, and Asia. Due to their physical and metabolic overlap with the crop, their underground parasitism, their achlorophyllous nature, and hardly destructible seed bank, broomrape weeds are usually not controlled by management strategies designed for non-parasitic weeds. Instead, broomrape are in a current state of intensification and spread due to lack of broomrape-specific control programs, unconscious introduction to new areas and may be decline of …
Characterisation of phenotypic plasticity in seedling stage of native and invasive populations in Ambrosia artemisiifolia L.
2012
Increased phenotypic plasticity has often been invoked as an hypothesis to explain the capacity of alien invasive plant species to colonize new environments, because it may enhance the ability of plants to cope with new biotic and abiotic conditions. Following this hypothesis, alien invasive populations should be represented by more plastic genotypes than populations in the native range. In annual species, the seedling stage is of crucial importance for population dynamics but surprisingly very few studies have investigated differences in phenotypic plasticity on seedling traits. Based on populations from the native range (North America) and the invasive range (France) of Ambrosia artemisii…
Importance of seeds in the process of common ragweed invasion
2012
International audience; Ambrosia artemisiifolia L. (common ragweed) was introduced into Europe at the end of the 1900s and is now present in several European countries. This annual invasive plant produces seeds that are highly polymorphic. Common ragweed can produce only a few thousand highly viable seeds. Many studies have focused on the seed stage. Greater seedling emergence for the seeds placed near the soil surface could explain the success of this species in open habitats, where the probability of deeper burial is low. Emergence percentage was found to decrease as burial depth increased from 2 to 8 cm, and no germination nor seedling emergence was observed for the seeds buried from 10-…
Phytotoxic effects of commercial essential oils on selected vegetable crops: Cucumber and tomato
2020
Abstract Essential oils of Origanum vulgare L., Rosmarinus officinalis L., Thymus mastichina L., Ocimum basilicum L., Melaleuca alternifolia Maiden & Betche ex Cheel, Eucalyptus globulus Labill., Gaultheria procumbens L. and Origanum majorana L., with herbicidal effects at different doses (0.125, 0.250, 0.50 and 1 μL/mL) were tested against Cucumis sativus L. and Solanum lycopersicum L., in order to ensure their harmlessness against these Mediterranean food crops. Oregano (carvacrol 60.42%) was the most damaging essential oil, exhibiting a dose-dependent phytotoxic activity against the seed germination and seedling growth of cucumber and tomato, whereas rosemary (1,8-cineole 24.95%, camphor…