We analyzed DNA damage, mitotic activity and polyploidization in Crepis capillaris callus cells during shortand long-term in vitro culture, and the influence of plant growth regulators on these processes. Changes in the concentration of growth regulators altered the stability of callus. The level of DNA damage was highly dependent on the growth regulator composition of the medium. Cytokinin at ...

Several chemical changes in soil are associated with plant growth-promoting rhizobacteria (PGPR). Some bacterial strains directly regulate plant physiology by mimicking synthesis of plant hormones, whereas others increase mineral and nitrogen availability in the soil as a way to augment growth. Identification of bacterial chemical messengers that trigger growth promotion has been limited in par...

The effect of plant growth hormones (kinetin, gibberellic acid (GA3) and indole acetic acid (IAA)) on EMS-induced mutant wing spots was studied with the somatic mutation and recombination test (SMART) in Drosophila melanogaster. GA3 reduced all kinds of EMS-induced spot. While a 10 -3 M concentration of kinetin reduced only the number of EMS-induced twin spots, a 10-4 M concentration was seen t...

The CLE (CLAVATA3/Endosperm surrounding region-related) peptide family is one of the best-studied secreted peptide families in plants. Accumulated data have revealed that CLE genes play vital roles on stem cell homeostasis in different types of meristems. Additionally, CLE genes have been found to perform various biological roles in plant growth and development, and in response to environmental...

Heavy metals are natural non-biodegradable constituents of the Earth's crust that accumulate and persist indefinitely in the ecosystem as a result of human activities. Since the industrial revolution, the concentration of cadmium, arsenic, lead, mercury and zinc, amongst others, have increasingly contaminated soil and water resources, leading to significant yield losses in plants. These issues ...

The objective of this study was to investigate the effects root cutting stress on dynamic changes endogenous hormone content and growth characteristics Quercus variabilis roots, explore physiological role hormones in regulating root-crown interactions short term. morphological contents normal roots (no cutting, CK) cut (cut by 1/3 length main root, RP) were determined liquid chromatograp...

Vermicomposting is a non-thermophilic, boioxidative process that involves earthworms and associated microbes. This biological organic waste decomposition process yields the biofertilizer namely the vermicompost. Vermicompost is a finely divided, peat like material with high porosity, good aeration, drainage, water holding capacity, microbial activity, excellent nutrient status and buffering cap...

Fenugreek is an medicinal plant that use in disease some therapy. This plant use  for blood lipids and sugar decreasing in diabetic and non diabetic peoples and have antioxidant and antibacterial activity. The plant contains active constituents such as alkaloids, flavonoids, steroids, Saponins etc. It is an old medicinal plant. It has been commonly used as a traditional food and medicine. Fenug...

in order to investigate the effect of two spermidine concentrations (0.5 and 1 µ m ) on in vitro gynogenesis of six onion accessions from khorasan province this research was carried out. results showed that the highest and lowest percentage of gynogenesis rate was belonged to m2 and m5 media, respectively. the highest (1.41) and lowest (0.33) percentage of gynogenic embryo were belonged to rosh...