the effect of arbuscular mycorrhizal fungi and plant growth promoting rhizobacteria, with the ability to produce acc deaminase enzyme, on water relationships and agronomic indices of sunflower (helianthus annuus l.) cultivars was investigated. the soil used was of an ec equal to 7.6 ds m-1. a greenhouse factorial experiment on the basis of a completely randomized block design with three levels ...

Herbicides adversely affect both the target plant and its environment. In this study, Helianthus annuus L. cv. “Oliva CL” was treated post-emergence with 0.3 to 3.1 mM quizalofop-p-ethyl. The peroxidase activity (POD), ascorbate peroxidase activity (APX), lipid peroxidation, pigment system and total phenolic content were then determined on the 1st, 5th, 10th and 15th days following treatment. T...

A metal-resistant bacterial strain SM3 isolated from a serpentine soil in the north-east of Portugal was characterized as Bacillus weihenstephanensis based on the morphological and biochemical characteristics and on the comparative analysis of the partial 16S ribosomal DNA sequence. Bacillus weihenstephanensis SM3 showed a high degree of resistance to nickel (1500 mg l(-1)), copper (500 mg l(-1...

Sunflower (Helianthus annuus L.) is one of the most important vegetable oil sources in world and our country. The preference for sunflower consumption increases importance sunflowers Rust, downy mildew, Verticillium wilt, Sclerotinia stalk head rot, charcoal blight, leaf spot are some diseases commonly seen sunflowers. In years, depending on climatic conditions, Downy mildew (Plasmopara halsted...

The formation of arsenic-phytochelatin (As-PC) complexes is thought to be part of the plant detoxification strategy for arsenic. This work examines (i) the arsenic (As) concentration-dependent formation of As-PC complex formation and (ii) redistribution and metabolism of As after arrested As uptake in Helianthus annuus. HPLC with parallel ICP-MS/ES-MS detection was used to identify and quantify...

The temperature sensitivity is reported for the latent period preceding ethylene-induced elongation in the adaxial half of the leaf petiole of Helianthus annuus. When intact plants were exposed to 10 mul of ethylene/l of air over the temperature range 18 to 35 C, the minimum latent time was 62 minutes at 28 C and the maximum was 132 minutes at 18 C. The temperature coefficient, Q(10), changed f...

The trihelix genes encode plant-specific transcription factors, which play a vital role in plant morphological and developmental processes. However, information about the presence of sunflower (Helianthus annuus L.) is scarce. Sunflower belongs to composite family possesses strong drought salt-alkali tolerance. In this study based on H. genome data, we have identified analyzed with complete des...