Sadržaj polifenola i antioksidativni kapacitet ekstrakata listova paradajza zaraženih plamenjačom

Late bligth is one of the main causes of the tomato yeild losses. In this paper, the biochemical response of tomato variety Plovdivski kasni in leaves infected with Phytopththora infestans was analyzed. It was found that there is a correlation between the degree of disease severity and the content of total polyphenols and flavonoids in the leaves. The different content of phenolic compounds also affected the antioxidant capacity of leaf extracts. By increasing the degree of infection, the content of the soluble polyphenolic compounds and the antioxidant capacity of the leaves decreased.Plamenjača je jedan od glavnih uzroka smanjenja prinosa paradajza što može dovesti do velikih ekonomskih gubitaka. U ovom radu je ispitan biohemijski odgovor listova paradajza sorte ‘Plovdivski kasni’ na infekciju prouzrokovačem plamenjače Phytopththora infestans. Utvrđeno je da postoji korelacija između stepena zaraženosti biljke i sadržaja ukupnih polifenola i flavonoida u listovima. Različit sadržaj fenolnih jedinjenja je uticao i na antioksidativni kapacitet ekstrakata listova. Povećanjem stepena infekcije sadržaj rastvorljivih polifenolnih jedinjenja i antioksidativni kapacitet listova se smanjivao

Mycoflora of commercial maize seed in 2010

Ear and kernel rots can reduce yield, quality and feed value of grain. Toxins produced by the fungi in corn can also have serious implications on the end use of the grain. Various fungi cause ear and kernel rots. Fungi belonging to the genus Fusarium are the most significant fungi which can cause corn ear and kernel rots. The aim of this paper is to test health of mercantile maize seed belonging to different hybrids. Seed health testing was done using filter paper and nutritive media (PDA) method. Fungi from genera Fusarium, Penicillium, Aspergillus and Alternaria were isolated from tested corn seed by both methods. Two species from the genus Fusarium were found in the tested corn samples F. graminearum and F. monilirome. Tested hybrids that belonged to different FAO maturity groups showed differences in susceptibility to ear and kernel rot.Plesnivost klipa i semena kukuruza mogu dovesti do smanjenja prinosa i uticati na kvalitet i vrednost zrna. Toksini koje produkuju gljive mogu imati značajan uticaj na krajnje korišćenje zrna. Različite gljive mogu prouzrokovati trulež klipa i zrna. Gljive iz roda Fusarium su najznačajniji prouzrokovači truleži klipa i semena kukuruza. Cilj ovog rada je bio da se ispita zdravstveno stanje merkantilnog semena različitih hibrida koji pripadaju različitim FAO grupama zrenja. Zdravstveno stanje semena je utvrđeno metodom filter papira i na hranljivoj podlozi