Eliminating Thrips in Microshoot Cultures

HortScience ◽  
1998 ◽  
Vol 33 (3) ◽  
pp. 506d-506
Author(s):  
Robert R. Tripepi ◽  
Holly J. Schwager ◽  
Mary W. George ◽  
Joseph P. McCaffrey
Keyword(s):  
Betula Pendula ◽  
Culture Media ◽  
Dry Weight ◽  
Thrips Tabaci ◽  
Shoot Cultures ◽  
Onion Thrips ◽  
Ulmus Americana ◽  
Shoot Height ◽  
Tissue Culture Media ◽  
Plant Tissue Cultures

Two insecticides, acephate or azadirachtin, were added to tissue culture media to determine their effectiveness in controlling onion thrips (Thrips tabaci Lindeman.) and to determine if these insecticides could damage the plant shoot cultures. To test for insecticide phytotoxicity, microshoots from European birch (Betula pendula), American elm (Ulmus americana), `Pink Arola' chrysanthemum (Dendranthema grandiflora), `America' rhododendron (Rhododendron catawbiense), `Golden Emblem' rose (Rosa hybrida), and `Gala' apple (Malus domestica) were placed in 130-ml baby food jars containing 25 ml of medium supplemented with 6.5, 13, or 26 mg/l Orthene® (contained acephate) or 0.55, 1.1, or 2.2 ml/l Azatin® (contained azadirachtin). Control jars lacked insecticide. To test for thrips control, 13 mg/l Orthene® or 0.55 ml/l Azatin® was added to Murashige and Skoog medium, and 10 thrips were placed on `Gala' apple microshoots in each jar. Jars were sealed with plastic wrap. In both studies, microshoot dry weight and heights were determined. In the second study, the total number of thrips per jar was also determined 3 weeks after inoculation. Microshoots on Orthene®-treated media lacked phytotoxicity symptoms, regardless of the concentration used. In contrast, Azatin® hindered plant growth, decreasing shoot height or dry weight by up to 85% depending on the species. Both insecticides prevented thrips populations from increasing, since less than 10 thrips were found in jars with insecticide-treated medium. Control jars, however, contained an average of almost 70 thrips per jar. This study demonstrated that both Orthene® and Azatin® were effective for eradicating thrips from plant tissue cultures, but Orthene® should probably be used because Azatin® was phytotoxic to all species tested.

Accumulation of mansonones in callus cultures of Ulmus americana L. in the absence of a fungal-derived elicitor

1997 ◽  
Vol 75 (3) ◽  
pp. 513-517 ◽  
Author(s):  
F. G. Meier ◽  
W. R. Remphrey
Keyword(s):  
Culture Media ◽  
Fungal Growth ◽  
Callus Cultures ◽  
Dutch Elm Disease ◽  
Ulmus Americana ◽  
Ophiostoma Ulmi ◽  
Medium Components ◽  
Tissue Culture Media ◽  
Wound Reaction ◽  
Accumulation Ability

The Dutch elm disease pathogens Ophiostoma ulmi (Buism.) Nannf. and Ophiostoma novo-ulmi Brasier elicit the production of phytoalexins called mansonones in the American elm (Ulmus americana L.). As part of a larger investigation, it was revealed that mansonone elicitation in callus culture does not require the Dutch elm disease pathogens, as has been reported in other studies. The objective of this study was to determine the nature and timing of the nonfungal elicited mansonone accumulation in U. americana callus. Initially, 7-week-old calli were subjected to inoculations with various fungal growth medium components. Mansonone production occurred in all treatments, indicating that it was stimulated prior to the addition of the medium components. Next, cotyledons and calli at various stages of development were analysed for the production of mansonones to determine the timing of its production. Mansonone production appeared to be correlated with the initiation of callus production and may be related to the callus wound reaction. As the callus aged, its colour changed from white–green to brown possibly as a result of phytoalexin accumulation. Additional experiments in which the cotyledon source, agar source, and type of plant tissue culture media were modified resulted in no change to the mansonone accumulation ability of the callus. The discrepancy between our results and those of other researchers could be due to differences in the method of mansonone quantification, namely, that our method is more sensitive and led to the detection of mansonones where previously none had been found. Further research must be done in this area to investigate this mansonone accumulation. Key words: phytoalexin, Dutch elm disease, mansonone, Ulmus americana, callus.

scholarly journals Pengaruh Ekstrak Yeast dan Pisang Raja Terhadap Pertumbuhan Tunas Embrio Vanda hookeriana Rchb.f.

2021 ◽  
Vol 14 (1) ◽  
pp. 138-151
Author(s):  
Shilfiana Rahayu ◽  
Edy Setiti Wida Utami ◽  
Aldy Bahaduri Indraloka
Keyword(s):  
Yeast Extract ◽  
Growth And Development ◽  
Culture Media ◽  
Growth Parameters ◽  
Dry Weight ◽  
Leaf Length ◽  
Shoot Height ◽  
Culture Techniques ◽  
Organic Components

AbstrakVanda hookeriana Rchb.f. merupakan anggrek yang dilindungi dan keberlangsungan hidupnya di alam terancam punah, sehingga perbanyakan anggrek secara in vitro sangat diperlukan. Penelitian ini bertujuan untuk mengetahui pengaruh ekstrak yeast dan pisang raja terhadap pertumbuhan tunas embrio anggrek V. hookeriana Rchb.f. Desain penelitian ini menggunakan RAL faktorial, faktor pertama adalah ekstrak yeast dengan 3 taraf: 0,5 g/L, 1 g/L, dan 1,5 g/L, faktor kedua adalah buah pisang raja dengan 3 taraf: 50 g/L, 100 g/L, dan 150 g/L. Penelitian dilakukan menggunakan teknik kultur jaringan, pengamatan dilakukan setiap bulan sekali dengan mengamati aspek morfologi plantlet. Media yang digunakan adalah Vacin-Went (VW) + kombinasi ekstrak yeast dan pisang raja. Parameter pengamatan berupa tinggi tunas, berat kering tunas, jumlah daun, diameter daun, panjang daun, berat kering daun, jumlah akar, diameter akar, panjang akar, berat kering akar, dan morfologi tunas. Hasil analisis menunjukkan bahwa perlakuan pisang raja 150 g/L + ekstrak yeast 0,5 g/L merupakan konsentrasi yang paling berperan terhadap parameter pertumbuhan anggrek V. hookeriana Rchb.f. Penelitian ini berhasil membuktikan bahwa penambahan komponen organik dalam media kultur jaringan memberikan respon pertumbuhan dan perkembangan yang baik pada eksplan. Komponen organik membantu proses fisiologis eksplan, karena komponen organik mengandung senyawa potensial yang dibutuhkan selama proses pertumbuhan dan perkembangan. Abstract Vanda hookeriana Rchb.f. is one of protected orchid and its survival in the wild was threatened by extinction, so orchid propagation was needed. This research aimed to determine the effect of yeast and pisang raja extracts to embryonal shoot growth of Vanda hookeriana Rchb.f. Experimental design used factorial RAL, first factor was yeast extract with 3 treatments (0.5 g/L; 1 g/L; & 1.5 g/L). Second factor was pisang raja with 3 treatments (50 g/L; 100 g/L; & 150 g/L). The research was conducted using in vitro culture techniques, observations were made once a month by observing the plantlet morphological parameters. The medium used was Vacin-Went (VW) + combination of yeast and pisang raja extracts. Observation parameters were shoot height, shoot dry weight, leaf number, leaf diameter, leaf length, leaf dry weight, number of roots, root diameter, root length, root dry weight and shoot morphology. The analysis showed that pisang raja treatment 150 g/L + yeast extract 0.5 g/L was the best concentration for the growth parameters of Vanda hookeriana Rchbf. This research were succeeded in proving that the addition of organic components in tissue culture media gave better response to growth and development of the explants. Organic components helps the explants in physiological ways because of  the organic components contain potential compounds needed during the growth and development process.

scholarly journals Induced callus from seedlings of Peganum harmala L. and studying harmine compound concentration in vitro and in vivo by GC analysis

2019 ◽  
pp. 1442-1451
Author(s):  
H. H. Mutasher ◽  
H. J. Attiya
Keyword(s):  
Tissue Culture ◽  
Callus Induction ◽  
Culture Media ◽  
Dry Weight ◽  
Peganum Harmala ◽  
Tissue Culture Media ◽  
Compound Concentration ◽  
Stimulation Of

Plant tissue culture considers a benefit biotechnological technique for scientific research especially the production of undifferentiation callus cells and regeneration through suspension or static media. The seedlings of Peganum harmala was used as a source to produce callus mass in vitro in static media through different tissue culture media supplemented by varying combinations of plant growth regulators (PGR). The result illustrates that 2 mg/l of Kinitine with 0.5 mg/l of 2, 4-D was efficient to stimulate callus induction with percent 100% in stem and root of P. harmala and this combination gave a high fresh weight, 1954 mg in root and 1170mg in stem and high dry weight in root and stem was 74.60, 60.30 respectively. In a comparative analysis through gas chromatography (GC) the stem and root in field recorded harmine concentration 56.13 and 40.95 μg respectively, which was higher than the in vitro callus induction from stem and root, which may be due to the fact that field plants have not been exposed to plant hormones with concentrations higher than the normal level, which reduced the stimulation of cells producing active compounds.

scholarly journals Artemisinin (Qinghaosu) Production in Artemisia annua

HortScience ◽  
1995 ◽  
Vol 30 (4) ◽  
pp. 888B-888
Author(s):  
Jorge F.S. Ferreira ◽  
James E. Simon ◽  
Jules Janick
Keyword(s):  
Developmental Stages ◽  
Artemisia Annua ◽  
Culture Media ◽  
Antimalarial Activity ◽  
Glandular Trichomes ◽  
Dry Weight ◽  
Shoot Cultures ◽  
Full Flowering ◽  
Shoot Number ◽  
Highly Correlated

Artemisinin (qinghaosu), an endoperoxide sesquiterpene lactone with antimalarial activity and little human toxicity, is produced in A. annua L., a short-day plant with the critical photoperiod of 13.5 h. Artemisinin peaks at full flowering when it is 11 times higher in inflorescences than in leaves. Supplementation of MS medium with BA, kinetin, CCC, or daminozide decreased content in shoot cultures as compared to the control, with the exception of CCC at 6.3 μM. Artemisinin content (percent dry weight) in this experiment did not correlate with shoot number (r = –0.198) but was highly correlated (r = 0.775**) with root number, indicating that although roots do not produce artemisinin, they may be involved in its synthesis. Maximum artemisinin was produced in hormone-free medium. Friable calli were obtained with a combination of BA (4.4 μM) and 2,4-D (4.5 μM), but artemisinin was absent from calli, cells, and cell culture media. Biseriate glandular trichomes are present in leaves and flowers from the earliest developmental stages. Artemisinin was extracted by a 1-min dip in organic solvents from flowers and leaves, indicating that the biseriate glandular trichomes of A. annua are the probable site of accumulation or sequestration of artemisinin.

Purification of Urokinase from Complex Mixtures Using Immobilized Monoclonal Antibody Against Urokinase Light Chain

1983 ◽  
Vol 49 (01) ◽  
pp. 024-027 ◽  
Author(s):  
David Vetterlein ◽  
Gary J Calton
Keyword(s):  
Monoclonal Antibody ◽  
Light Chain ◽  
Culture Media ◽  
Biological Fluids ◽  
Single Step ◽  
High Yield ◽  
Step Method ◽  
Commercial Preparation ◽  
E Coli ◽  
Tissue Culture Media

SummaryThe preparation of a monoclonal antibody (MAB) against high molecular weight (HMW) urokinase light chain (20,000 Mr) is described. This MAB was immobilized and the resulting immunosorbent was used to isolate urokinase starting with an impure commercial preparation, fresh urine, spent tissue culture media, or E. coli broth without preliminary dialysis or concentration steps. Monospecific antibodies appear to provide a rapid single step method of purifying urokinase, in high yield, from a variety of biological fluids.

scholarly journals Halotolerant Microbial Consortia for Sustainable Mitigation of Salinity Stress, Growth Promotion, and Mineral Uptake in Tomato Plants and Soil Nutrient Enrichment

2021 ◽  
Vol 13 (15) ◽  
pp. 8369
Author(s):  
Chintan Kapadia ◽  
R. Z. Sayyed ◽  
Hesham Ali El Enshasy ◽  
Harihar Vaidya ◽  
Deepshika Sharma ◽  
...  
Keyword(s):  
Salt Stress ◽  
Salinity Stress ◽  
Dry Weight ◽  
Stress Factors ◽  
Microbial Consortia ◽  
Soil Conditions ◽  
Mineral Uptake ◽  
Shoot Height ◽  
Tomato Plants ◽  
Secondary Roots

Salinity significantly impacts the growth, development, and reproductive biology of various crops such as vegetables. The cultivable area is reduced due to the accumulation of salts and chemicals currently in use and is not amenable to a large extent to avoid such abiotic stress factors. The addition of microbes enriches the soil without any adverse effects. The effects of microbial consortia comprising Bacillus sp., Delftia sp., Enterobacter sp., Achromobacter sp., was evaluated on the growth and mineral uptake in tomatoes (Solanum Lycopersicum L.) under salt stress and normal soil conditions. Salinity treatments comprising Ec 0, 2, 5, and 8 dS/m were established by mixing soil with seawater until the desired Ec was achieved. The seedlings were transplanted in the pots of the respective pH and were inoculated with microbial consortia. After sufficient growth, these seedlings were transplanted in soil seedling trays. The measurement of soil minerals such as Na, K, Ca, Mg, Cu, Mn, and pH and the Ec were evaluated and compared with the control 0 days, 15 days, and 35 days after inoculation. The results were found to be non-significant for the soil parameters. In the uninoculated seedlings’ (control) seedling trays, salt treatment significantly affected leaf, shoot, root dry weight, shoot height, number of secondary roots, chlorophyll, and mineral contents. While bacterized seedlings sown under saline soil significantly increased leaf (105.17%), shoot (105.62%), root (109.06%) dry weight, leaf number (75.68%), shoot length (92.95%), root length (146.14%), secondary roots (91.23%), and chlorophyll content (−61.49%) as compared to the control (without consortia). The Na and K intake were higher even in the presence of the microbes, but the beneficial effect of the microbe helps plants sustain in the saline environment. The inoculation of microbial consortia produced more secondary roots, which accumulate more minerals and transport substances to the different parts of the plant; thus, it produced higher biomass and growth. Results of the present study revealed that the treatment with microbial consortia could alleviate the deleterious effects of salinity stress and improve the growth of tomato plants under salinity stress. Microbial consortia appear to be the best alternative and cost-effective and sustainable approach for managing soil salinity and improving plant growth under salt stress conditions.

scholarly journals Nanoscale Strontium-Substituted Hydroxyapatite Pastes and Gels for Bone Tissue Regeneration

Nanomaterials ◽  
2021 ◽  
Vol 11 (6) ◽  
pp. 1611
Author(s):  
Caroline J. Harrison ◽  
Paul V. Hatton ◽  
Piergiorgio Gentile ◽  
Cheryl A. Miller
Keyword(s):  
Bone Tissue ◽  
Tissue Regeneration ◽  
Culture Media ◽  
Full Range ◽  
Sol Gel ◽  
Tissue Growth ◽  
Bone Tissue Regeneration ◽  
Tissue Culture Media ◽  
Bone Deposition

Injectable nanoscale hydroxyapatite (nHA) systems are highly promising biomaterials to address clinical needs in bone tissue regeneration, due to their excellent biocompatibility, bioinspired nature, and ability to be delivered in a minimally invasive manner. Bulk strontium-substituted hydroxyapatite (SrHA) is reported to encourage bone tissue growth by stimulating bone deposition and reducing bone resorption, but there are no detailed reports describing the preparation of a systematic substitution up to 100% at the nanoscale. The aim of this work was therefore to fabricate systematic series (0–100 atomic% Sr) of SrHA pastes and gels using two different rapid-mixing methodological approaches, wet precipitation and sol-gel. The full range of nanoscale SrHA materials were successfully prepared using both methods, with a measured substitution very close to the calculated amounts. As anticipated, the SrHA samples showed increased radiopacity, a beneficial property to aid in vivo or clinical monitoring of the material in situ over time. For indirect methods, the greatest cell viabilities were observed for the 100% substituted SrHA paste and gel, while direct viability results were most likely influenced by material disaggregation in the tissue culture media. It was concluded that nanoscale SrHAs were superior biomaterials for applications in bone surgery, due to increased radiopacity and improved biocompatibility.

Sign in / Sign up

Export Citation Format

Share Document