In this report, we demonstrate that nitric oxide (NO) mediates the auxin response leading adventitious root formation. A transient increase in NO concentration was shown to be required and part of molecular events involved development induced by indole acetic acid

Abscisic acid (ABA) triggers a complex sequence of signaling events that lead to concerted modulation ion channels at the plasma membrane guard cells and solute efflux drive stomatal closure in plant leaves. Recent work has indicated nitric oxide (NO) its synthesis are prerequisite for ABA signal transduction Arabidopsis Vicia cells. Its mechanism(s) action is not well defined and, generally, higher plants. Here we show directly NO selectively regulates Ca 2+ -sensitive by promoting release...

Abstract This report describes part of the signaling pathway and some molecules involved in auxin-induced adventitious root formation cucumber (Cucumis sativus). Previous results showed that nitric oxide (NO) mediates auxin response during (Pagnussat et al., 2002). To determine order action indole acetic acid (IAA) NO within signal transduction to elucidate target are downstream action, hypocotyl cuttings were submitted a pretreatment leading endogenous depletion. The depletion treatment...

Commentary p910

Summary Previous studies have demonstrated that auxin (indole‐3‐acetic acid) and nitric oxide (NO) are plant growth regulators coordinate several physiological responses determining root architecture. Nonetheless, the way in which these factors interact to affect developmental processes is not well understood. The Arabidopsis thaliana F‐box proteins TRANSPORT INHIBITOR RESPONSE 1/AUXIN SIGNALING F‐BOX (TIR1/AFB) receptors mediate degradation of AUXIN/INDOLE‐3‐ACETIC ACID (Aux/IAA) repressors...

Abstract The search for a nitric oxide synthase (NOS) sequence in the plant kingdom yielded two sequences from recently published genomes of green algae species Ostreococcus genus, O. tauri and lucimarinus. In this study, we characterized sequence, protein structure, phylogeny, biochemistry, expression NOS tauri. amino acid was found to be 45% similar that human NOS. Folding assignment methods showed can fold as endothelial isoform. Phylogenetic analysis revealed clusters together with...

Summary Iron is an essential and commonly limited nutrient for plants. To increase the uptake of iron during times low supply, plants, except grasses, activate a set physiological morphological responses in their roots that include reduction, soil acidification, Fe(II) transport proliferation root hairs. It not known how cells sense transduce changes occur after onset deficiency. This work presents evidence nitric oxide (NO) produced rapidly epidermis tomato plants ( Solanum lycopersicum )...

Abstract Abscisic acid (ABA) is a well-studied regulator of stomatal movement. Hydrogen sulfide (H2S), small signaling gas molecule involved in key physiological processes mammals, has been recently reported as new component the ABA network guard cells. In Arabidopsis (Arabidopsis thaliana), H2S enzymatically produced cytosol through activity l-cysteine desulfhydrase (DES1). this work, we used DES1 knockout mutant plants (des1) to study participation cross talk between and nitric oxide (NO)...

Abstract Nitric oxide (NO) is a freely diffusible, gaseous free radical and an important signaling molecule in animals. In plants, NO influences aspects of growth development, can affect plant responses to stress. some cases, the effects are result its interaction with reactive oxygen species (ROS). These interactions be cytotoxic or protective. Because gibberellin (GA)-induced programmed cell death (PCD) barley (Hordeum vulgare cv Himalaya) aleurone layers mediated by ROS, we examined...

Despite recent efforts to elucidate the regulation of stomatal movement, many components within branched pathways guard cell abscisic acid (ABA) signaling remain be identified. Here, we show results supporting involvement nitric oxide (NO) as a new component this

Abstract Recently, it was demonstrated that nitric oxide (NO) and cGMP are involved in the auxin response during adventitious rooting process cucumber (Cucumis sativus; Pagnussat et al., 2002, 2003). However, not much is known about complex molecular network operating cell proliferation morphogenesis triggered by auxins NO process. Anatomical studies showed formation of root primordia clearly detected indole acetic acid (IAA)- NO-treated explants, while neither nor differentiation into could...

ABSTRACT Nitric oxide (NO) is a bioactive molecule that exerts number of diverse activities in phylogenetically distant species, as well opposing effects related biological systems. It was firstly described mammals major messenger the cardiovascular, immune and nervous system, which it plays regulatory, signalling, cytoprotective cytotoxic ( Ignarro , Annual Review Pharmacology Toxicology 30, 535–560, 1990; Anbar Experientia 51, 545–550, 1995). This versatility mainly achieved through...

THE ROOT EPIDERMIS IS COMPOSED OF TWO CELL TYPES: trichoblasts (or hair cells) and atrichoblasts non-hair cells). In lettuce (Lactuca sativa cv. Grand Rapids var. Rapidmor oscura) plants grown hydroponically in water, the root epidermis did not form hairs. The addition of 10 microM sodium nitroprusside (SNP), a nitric oxide (NO) donor, resulted almost all rhizodermal cells differentiated into Treatment with synthetic auxin 1-naphthyl acetic acid (NAA) displayed significant increase formation...

Nitric oxide (NO) is a bioactive molecule involved in diverse physiological functions plants. It has previously been reported that the NO donor sodium nitroprusside (SNP) applied to germinated tomato seeds was able induce lateral root (LR) formation same way auxin treatment does. In this paper, it shown modulates expression of cell cycle regulatory genes pericycle cells and leads, turn, induced LR formation. The addition scavenger CPTIO at different time points during auxin-mediated...

Abstract Iron deficiency impairs chlorophyll biosynthesis and chloroplast development. In leaves, most of the iron must cross several biological membranes to reach chloroplast. The components involved in complex internal transport are largely unknown. Nitric oxide (NO), a bioactive free radical, can react with transition metals form metal-nitrosyl complexes. Sodium nitroprusside, an NO donor, completely prevented leaf interveinal chlorosis maize (Zea mays) plants growing concentration as low...

A few years ago it was demonstrated that nitric oxide (NO) and cGMP are involved in the auxin response during adventitious root (AR) formation cucumber (Cucumis sativus). More recently, a mitogen-activated protein kinase cascade shown to be induced by IAA NO-dependent, but cGMP-independent, pathway. In present study, involvement of Ca2+ regulation Ca2+-dependent (CDPK) activity IAA- NO-induced AR evaluated explants. The effectiveness several broad-spectrum channel inhibitors chelators...