Influence of Plant Growth Regulators on Somatic Embryogenesis Induction in Seriphidium herba-album

Seriphidium herba-album (syn. Artemisia herba-alba) is a medicinal, aromatic, greenish-silver herb. It is used widely in folk medicine for treatment of diarrhea, abdominal cramps and in the healing of external wounds. It's also used for the treatment of diabetes mellitus, neurological disorders as epilepsy, Alzheimer's disease, depression and jaundice. In this study we assessed the protocol for callus induction, maturation of somatic embryogenesis, frequency of germination and conversion into plantlets for leaf explants of Seriphidium herba-album using different concentrations of PGRs. Highest induction frequencies of embryogenic calli occurred after 35 days on MS medium supplemented with 1.5 mg L-1 2,4-D and 0.5 mg L-1 BAP. Optimum MS medium for higher frequency of matured somatic embryos was recorded using 5.0 mg L-1 BAP and 0.5 mg L-1 NAA and somatic embryos also induced young in vitro grown plantlets when cultured in the medium containing GA3 and kinetin. Hence, attempts to induce direct somatic embryogenesis have been achieved up to embryo regeneration and maturation

Plant Growth Regulators in Mulberry

Plant growth regulators are organic compounds synthesized in specified plant parts in small quantity and are transported to the place of requirement leading to a change in physiological responses. Plant growth regulators can be classified into growth promoters and growth retardants. Plant growth regulators are auxins, gibberellin, cytokinin and growth retardants are Abscisic acid and ethylene. The latest one added to the growth promoter is Brassinosteroid, used to translocate the nitrogen and phosphorus. Triacontanol is one of the commercial formulations and used to increase the moisture and protein content of leaves, which ultimately built the disease resistance in silkworm. Plant growth promoting Rhizobacteria stimulates the plant growth regulators like auxins, gibberellins etc., and help in better nutrient uptake and increase tolerance. Vermicompost also contains some plant growth regulators. The combined effect of different plant growth regulators will give positive result in mulberry growth

Effects of reduced-risk pesticides and plant growth regulators on rove beetle (Coleoptera: Staphylinidae) adults

Citation: Echegaray, Erik R., and Raymond A. Cloyd. 2012. “Effects of Reduced-Risk Pesticides and Plant Growth Regulators on Rove Beetle (Coleoptera: Staphylinidae) Adults.” Journal of Economic Entomology 105 (6): 2097–2106. https://doi.org/10.1603/EC12244.In many regions, pest management of greenhouse crops relies on the use of biological control agents; however, pesticides are also widely used, especially when dealing with multiple arthropod pests and attempting to maintain high esthetic standards. As such, there is interest in using biological control agents in conjunction with chemical control. However, the prospects of combining natural enemies and pesticides are not well known in many systems. The rove beetle, Atheta coriaria (Kraatz), is a biological control agent mainly used against fungus gnats (Bradysia spp.). This study evaluated the effects of reduced-risk pesticides and plant growth regulators on A. coriaria adult survival, development, and prey consumption under laboratory conditions. Rove beetle survival was consistently higher when adults were released 24 h after rather than before applying pesticides. The pesticides acetamiprid, lambda-cyhalothrin, and cyfluthrin were harmful to rove beetle adults, whereas Beauveria bassiana (Balsamo) Vuillemin, azadirachtin, and organic oils (cinnamon oils, rosemary oil, thyme oil, and clove oil) were nontoxic to A. coriaria adults. Similarly, the plant growth regulators acymidol, paclobutrazol, and uniconazole were not harmful to rove beetle adults. In addition, B. bassiana, azadirachtin, kinoprene, organic oils, and the plant growth regulators did not negatively affect A. coriaria development. However, B. bassiana did negatively affect adult prey consumption. This study demonstrated that A. coriaria may not be used when applying the pesticides, acetamiprid, lambda-cyhalothrin, and cyfluthrin, whereas organic oils, B. bassiana, azadirachtin, and the plant growth regulators evaluated may be used in conjunction with A. coriaria adults. As such, these compounds may be used in combination with A. coriaria in greenhouse production systems

Plant growth regulators for cotton

"Original authors: David W. Albers and C. Tim Schnakenberg"Abstract supplied by catalogerAn informational article about plant growth regulators for cotton.Gene Stevens (State Extension Agronomy Professor)Taken from the Extension website: Reviewed Sept. 2020Includes bibliographical reference

Investigation of potential anti-radiation and anti-neoplastic compounds related to plant growth regulators second quarterly progress report, 1 oct. 1964 - 1 jan. 1965

Antiradiation and antineoplastic compounds related to plant growth regulators - cytotoxic effects and radiation protectio

DNA damage in Crepis capillaris cells in response to in vitro condition

We analyzed DNA damage, mitotic activity and polyploidization in Crepis capillaris callus cells during short- and 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 high concentrations damaged DNA in the absence of auxin. Short- and long-term callus differed in sensitivity to growth regulators. Mitotic activity changed when callus was transferred to medium with modified growth regulators. Callus cell nuclear DNA content increased with age and in response to plant growth regulators. Hormones played a role in the genetic changes in C. capillaries callus culture. We demonstrated the usefulness of C. capillaris callus culture as a model for analyzing the effect of culture conditions, including plant growth regulators, on genetic stability

Effect of dose and timing of application of different plant growth regulators on lodging and grain yield of a Scottish landrace of barley (Bere) in Orkney, Scotland

The effects of dose and the timing of the application of three different types of plant growth regulators on lodging and grain yield of a landrace of barley (Bere) were investigated. Results indicated that the application of full dose of plant growth regulators at Zadoks growth stage 31 had improved lodging resistance by reducing the stem length. Amongst plant growth regulators Upgrade caused the highest reduction in stem length and lodging index compared with other plant growth regulators while Adjust was the least effective plant growth regulator. The results indicated that Upgrade was less effective in lodging control at the higher nitrogen level (90 kg ha-1). Although this plant growth regulator improved lodging resistance, grain yield was not enhanced in any of the trials. This outcome was due to a delayed lodging and/or absence of severe lodging in the control plots. Further investigations on the effect of timing of lodging incidence on grain yield would be useful extension of the present study. A separate trial investigating the effectiveness of Upgrade in lodging control under a range of nitrogen levels is recommended

Plant growth regulators for cotton (1994)

Several new plant growth regulators have come on the market for use in cotton in recent years. These plant growth regulators have given growers a new opportunity to influence cotton growth to their advantage. However, this opportunity goes only as far as the ability of the grower to understand and use them properly.David W. Albers (State Extension Specialist-Cotton, Delta Center), C. Tim Schnakenberg (Mississippi County)New March 1994Includes bibliographical reference