two groups of olive cultivars were characterized as showing low (tokhmkabki) and high (roghani) rooting percentage after application of iba treatment. semi-hard wood cuttings were dipped in h 2 2 o 2 (0-3.5% w/v) and iba (4000 mg.l -1 ) and also they were investigated in combination. h 2 o 2 alone did not stimulate rooting of olive cuttings and there were no significant differences between this...

The effect of auxin application on auxin metabolism was investigated in excised hypocotyl cultures of carrot (Daucus carota). Concentrations of both free and conjugated indole-3-acetic acid (IAA), [2H4]IAA, 2,4-dichlorophenoxyacetic acid, and naphthaleneacetic acid (NAA) were measured by mass spectroscopy using stable-isotope-labeled internal standards. [13C1]NAA was synthesized for this purpos...

Plant growth depends on the integration of environmental cues and phytohormone-signaling pathways. During seedling emergence, elongation of the embryonic stem (hypocotyl) serves as a readout for light and hormone-dependent responses. We screened 10,000 chemicals provided exogenously to light-grown seedlings and identified 100 compounds that promote hypocotyl elongation. Notably, one subset of t...

Auxins mediate various processes that are involved in plant growth and development in response to specific environmental conditions. Its proper spatio-temporal distribution that is driven by polar auxin transport machinery plays a crucial role in the wide range of auxins physiological effects. Numbers of approaches have been developed to either directly or indirectly monitor auxin distribution ...

Ecklonia maxima and the commercial biostimulants produced from it contain various plant growth regulators that are responsible for stimulation recorded in many crops. Auxins one of major contained E. extracts. The aim this research was to evaluate growth-promoting effect a seaweed extract on lettuce tomato transplant production under nursery conditions, compare with an equal concentration synth...

Anion channels are thought to participate in signal transduction and turgor regulation in higher plant cells. The regulation of hypocotyl cell elongation is a situation in which these channels could play important roles because it involves ionic fluxes that are implicated in turgor control and orchestrated by various signals. We have used a pharmacological approach to reveal the contribution of...

Understanding the impact of farming practices on composition weed communities has important implications for sustainability management strategies. This study analyses data from a 40-year experiment established at two sites in Czech Republic 1972. The herbicide strategies was evaluated multi-crop rotation (MCR) with 50% cereals, and simple crop rotations (SCR) 75% cereals. following were compare...

This paper describes a method for in vitro binding of auxins to particulate fractions from corn coleoptiles. The binding is auxin-specific: only auxins and auxin analogues that are known to interfere with auxin transport and/or growth specifically bind to the auxin receptors. Saturation kinetics show that the apparent KD values are between 1O~and 1O~M for auxin and auxin analogues. The particul...