Witam .
Czytając opis Canna Boost Accelerator zauważyłem , że piszą żeby nie używać kombinacji z produktami zawierającymi nadtlenek wodoru (H202).
Pewnie dlatego , że jest on głównym składnikiem tego produktu a przedawkowanie go może uszkodzić roślinkę .
Nie zgodzę się z tym. Kiełkowałem po 100 sztuk nasion w czystej wodzie i 100 sztuk z wodą utlenioną w temperaturze 22 stopnie na wacie (nasiona z op, rośliny która hermiła, od kolegi) i nie było widać żadnej, a to żadnej różnicy w ilości kiełków czy szybkości ich wzrostu, rozpoczęcia kiełkowania.(chyba nawet zeszło mi w normalnej wodzie 2-4 więcej. Nasiona dobrałem o podobnej wielkości i ciemności skorupki)* Kiełkujących nasion przed sadzeniem. Dodane do wody w której moczą się nasiona powoduje, że roślina kiełkuje szybciej oraz jest mocniejsza i intensywniej się rozwija
wnioskuje ,że skoro napisano na canna boostcie żeby nie mieszać z nim nadtlenku wodoru to wiadome jest producentowi że jest wykorzystywany w wielu uprawach co oznacza że nadtlenek napewno ma korzystny wpływ na rosliny, ale nie wiemy w jakich stężeniach i jak dokładnie działa. Więc nie mówcie mi tu że nic nie pomaga. Russian pisał ,że będzie dozował, nie wiecie czy mu to pomogło ?
Okej nadtlenek wodoru niszczy grzybnie ale to nie zmienia faktu ,że po użyciu go rośliny rosły szybciej. Tak jak piszesz to pewnie nie są najnowsze odkrycia ale wciaż jest efekt pewnie w nie kazdej ziemii jest tyle grzybow co w tym.
""Do NOT use the Canna Bio range of nutrients or additives with any products containing Hydrogen Peroxide (H2O2)." - czyli co leją wody utlenionej pol na pol z nawozem ? " nie skumalem
""Do NOT use the Canna Bio range of nutrients or additives with any products containing Hydrogen Peroxide (H2O2)." - czyli co leją wody utlenionej pol na pol z nawozem ? " nie skumalem
Placebo napisał:Okej nadtlenek wodoru niszczy grzybnie
Abstract
Higher plants growing in natural environments experience various abiotic stresses. H2O2 and nitric oxide (NO) free radicals are produced and cause oxidative damage to plants under various abiotic stress conditions. However, in the present study, we found that pretreating rice seedlings with low levels (<10 μM) of H2O2 or NO permitted the survival of more green leaf tissue, and of higher quantum yield for photosystem II, than in non-treated controls, under salt and heat stresses. It was also shown that the pretreatment induces not only active oxygen scavenging enzymes activities, but also expression of transcripts for stress-related genes encoding sucrose-phosphate synthase, Δ′-pyrroline-5-carboxylate synthase, and small heat shock protein 26, These results suggest that H2O2 and NO can increase both salt and heat tolerance in rice seedlings by acting as signal molecules for the response.
Keywords
H2O2; Nitric oxide; Salt stress; Heat stress; Abiotic stress tolerance
Hydrogen peroxide mediates plant root cell response to nutrient deprivation
Ryoung Shin and Daniel P. Schachtman *
+ Author Affiliations
Donald Danforth Plant Science Center, St. Louis, MO 63132
Edited by Clarence A. Ryan, Jr., Washington State University, Pullman, WA, and approved April 30, 2004 (received for review March 10, 2004)
Abstract
Potassium (K+) is an essential nutrient required by plants in large quantities, but changes in soil concentrations may limit K+ acquisition by roots. It is not known how plant root cells sense or signal the changes that occur after the onset of K+ deficiency. Changes in the kinetics of Rb+ uptake in Arabidopsis roots occur within 6 h after K+ deprivation. Reactive oxygen species (ROS) and ethylene increased when the plants were deprived of K+. ROS accumulated in a discrete region of roots that has been shown to be active in K+ uptake and translocation. Suppression of an NADPH oxidase in Arabidopsis (rhd2), which is involved in ROS production, prevented the up-regulation of genes that are normally induced by K+ deficiency, but the induction of high-affinity K+ transport activity was unchanged. Application of H2O2 restored the expression of genes induced by K+ deficiency in rhd2 and was also sufficient to induce high-affinity K+ transport activity in roots grown under K+-sufficient conditions. ROS production is an early root response to K+ deficiency that modulates gene expression and physiological changes in the kinetics of K+ uptake.
Hydrogenperoxide pre-treatment induces salt-stress acclimation in maize plants
André Dias de Azevedo Netoa, José Tarquinio Priscob, Joaquim Enéas-Filhob, Jand-Venes Rolim Medeirosb, Enéas Gomes-Filhob, ,
a Departamento de Biologia, Universidade Federal Rural de Pernambuco, 52171-900, Recife, Pernambuco, Brazil
b Departamento de Bioquímica e Biologia Molecular, Universidade Federal do Ceará, Caixa Postal 6039, 60455-900 Fortaleza, Ceará, Brazil
Received 28 October 2004. Accepted 5 January 2005. Available online 19 March 2005.
Summary
The effect of exogenously applied H2O2 on salt stress acclimation was studied with regard to plant growth, lipid peroxidation, and activity of antioxidative enzymes in leaves and roots of a salt-sensitive maize genotype. Pre-treatment by addition of 1 μM H2O2 to the hydroponic solution for 2 days induced an increase in salt tolerance during subsequent exposure to salt stress. This was evidenced by plant growth, lipid peroxidation and antioxidative enzymes measurements. In both leaves and roots the variations in lipid peroxidation and antioxidative enzymes (superoxide dismutase, ascorbate peroxidase, guaiacol peroxidase, glutathione reductase, and catalase) activities of both acclimated and unacclimated plants, suggest that differences in the antioxidative enzyme activities may, at least in part, explain the increased tolerance of acclimated plants to salt stress, and that H2O2 metabolism is involved as signal in the processes of maize salt acclimation.
Keywords
Acclimation; Antioxidative enzymes; Hydrogenperoxide; Lipid peroxidation; Maize; Oxidative stress; Salt stress; Zea mays