Different isolates of Trichoderma are able to produce metabolites which induce some morphological and physiological changes in plant such as enhanced plant growth and response to plant pathogens or reduced plant stress. The aim of the present study is to evaluate the effect of some Trichoderma isolates on plant growth promoting and physiological parameters of tomato plants. Also, the Trichoderma isolates were assessed based on IAA (indole 3-acetic acid) production and ability to solubilize phosphate, traits associated to growth. Tomato seed treatment with Trichoderma isolates led to a significant increase in plant height as well as root length and root fresh/ dry weight. However, metabolite production varied among isolates and depends on the isolate. Our data indicated that three of the Trichoderma isolates studied increase leaf pigments content and improve the photosynthetic activity of tomato plants.
The main objective of this study was to evaluate the quality of essential oil (EO) and hydrolate (HY) obtained from a new Romanian variety of hyssop (Hyssopus officinalis L., Lamiaceae family), namely ‘Cătălin’. The chemical composition and the concentration of the compounds was established by gas chromatography coupled to mass spectrometry (GC/MS). The main constituents identified in hyssop EO and HY were cis-pinocamphone (34.63% and 67.00%), trans-pinocamphone (11.72% and 14.58%), thujenol (1.39% and 6.05%). The evaluation of the antioxidant capacity was performed by three methods (DPPH, ABTS and FRAP), EO proving a higher oxidizing activity compared to HY one. The antimicrobial activity of the essential oil was evaluated in vitro, in order to detect its ability to inhibit G- phytopathogenic bacteria (Pseudomonas syringae) and plant pathogenic fungi (Fusarium oxysporum). Eugenol, linalool and estragole standards were used as reference volatile compounds. Regarding Pseudomonas syringae (LMG5090) bacterium, assays showed that hyssop oil does not inhibit its growth. Estragole and eugenol showed pronounced antibacterial activity in all tested concentrations, both in the first 24 hours of incubation and after 3 days. Linalool instead has bacteriostatic activity only at high concentrations (50% and 100%), an inhibitory activity that is maintained only in the first 24 hours of incubation. The results obtained against Fusarium oxysporum reveal that the EO tested has no fungicidal activity but only fungistatic, and it is able to delay mycelial growth and the degree of inhibition depending on the concentration used.
"Agriculture is the backbone of our country; Textile can be the backbone of Agriculture?" Today, agriculture and horticulture has realized the need of tomorrow and opting for various technologies to get higher overall yield, quality and tasty agro-products. This review works as an introduction about the agro-textile products available currently to bang the agriculture. This gives the idea about the properties and classification of the agrotextile products.
In the context of the current climate change, it has become urgently necessary to develop adequate systems to protect horticultural crops. In Romania, the losses caused to these cultures by the extreme weather phenomena, as well as the lack of active intervention measures to combat or limit them, represent the main argument for addressing this field in particular. Vegetable crops are generally sensitive to extreme weather phenomena. In the climatic conditions in our country, the extreme phenomena occur between March and September, which coincides with the vegetation period of the crops. Of these, hail causes significant damage, and in some cases, at high intensity and long-lasting, can cause the calamity of vegetable crops. Another effect can arise in the drought years, when, in the absence of rainfall, the weeds enter into a fierce competition with vegetables, as regards the specific consumption of water and nutrients. The paper presents a review regarding the current methods of vegetable crops protection against the extreme weather phenomena and of weed control in these crops, grown in organic system. Combining the available solutions, adopting integrated strategies for non-chemical weed control can be an important premise for researchers and farmers to protect vegetable crops.
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