Sunflower (Helianthus annuus) is a major oilseed crop, cultivated throughout the world, and nutritional quality of its edible oil ranks among best vegetable oils in agricultural product. In Tunisia, there lack study on biochemical characterization sunflower germplasm oil. The present was conducted to analyze content fatty acid composition 22 local introduced accessions. Results revealed signifi...

Multiple molecular forms of inhibitors of trypsin (TI) and chymotrypsin (CI), which are typical digestive enzymes of insects, mammals and micro-organisms, and subtilisin (SI), a proteinase of many bacteria and phytopathogenic fungi, were identified in seeds and vegetative organs of the majority of 128 wild and cultivated species representing 65 genera of three of the subfamilies of the Composit...

The origin of new diploid species through inter-specific hybridization may be facilitated by rapid genomic reorganization. There is evidence that this process was involved in the independent origins of three annual sunflower species in the genus Helianthus. The three hybrid taxa, H. anomalus, H. deserticola and H. paradoxus, are products of ancient hybridization events between the same two pare...

BACKGROUND Since oxidative stress has been implicated in a neurodegenerative disease such as Alzheimer's disease (AD), natural antioxidants are promising candidates of chemopreventive agents. This study examines antioxidant and neuronal cell protective effects of various fractions of the methanolic extract of Erigeron annuus leaf and identifies active compounds of the extract. METHODS Antioxi...

Soils close to former mines or metallurgical facilities often contain extreme concentrations of potentially toxic elements (PTEs), and among soil remediation actions needed, enhanced phytoextraction techniques using chelating agents could be a very promising option. In this context, pot experiment was conducted evaluate the effect Na2-EDTA, olive mill wastewater (OMW), their combination (EDTA +...

UNLABELLED • PREMISE OF THE STUDY Evolutionary changes in how flowering time responds to photoperiod cues have been instrumental in expanding the geographic range of agricultural production for many crop species. Locally adaptive natural variation in photoperiod response present in wild relatives of crop plants could be leveraged to further improve the present and future climatic ranges of cu...

The growth responses of a sunflower seedling (Helianthus annuus L.), subjected to repeated inversion, were characterized by time-lapse recording in conjunction with video image analysis. The investigation revealed a characteristic response pattern and established that the directional movement of the seedling is achieved by both inhibition and stimulation of growth in the normal growing regions....