Effect of Fructose on Growth of Papaw Shoot Explants in vitro

1993 ◽  
Vol 41 (6) ◽  
pp. 739 ◽  
Author(s):  
RA Drew ◽  
JA Considine ◽  
JA Mccomb
Keyword(s):  
Shoot Growth ◽  
Carica Papaya ◽  
Axillary Bud ◽  
Stem Tissue ◽  
Radish Cotyledon

The effects on papaw (Carica papaya L.) shoot growth of the carbohydrates sucrose, fructose, glucose and ribose singly and combined, were compared at a range of concentrations, in both autoclaved and filtered media. Fructose (10 g L-1), when autoclaved together with other media components, consistently promoted growth of shoots from buds on nodal sections or buds excised with a wedge of stem tissue. This enhancement was seen if the fructose was used singly or in combination with 10 g L-1 sucrose. By contrast, autoclaved media containing fructose reduced growth of small axillary bud explants. Decreasing the pH of fructose solution from 5.8 to 4.4 before autoclaving enhanced growth of buds from nodal sections. Other sugars in the D-ketose group inhibited papaw shoot growth totally when autoclaved with other media components. A radish cotyledon bioassay of solutions of fructose autoclaved singly or with NH4NO3 (20 mM) showed no evidence of cytokinin effects.

scholarly journals The Effects of Growth Regulators on Shoot Propagation and Rooting of Vitis Following in Vitro Axillary Bud and Shoot Apex Culture

HortScience ◽  
1997 ◽  
Vol 32 (3) ◽  
pp. 516C-516
Author(s):  
Handan Büyükdemirci ◽  
Paul E. Read
Keyword(s):  
Shoot Apex ◽  
Shoot Growth ◽  
Shoot Proliferation ◽  
Multiple Shoots ◽  
Multiple Shoot ◽  
Axillary Buds ◽  
Axillary Bud ◽  
Ms Medium ◽  
Axillary Bud Culture

Axillary buds of `Valiant' grapevine (Vitis spp.) grown in vitro were transferred onto Murashige and Skoog (MS) medium supplemented with different cytokinin and auxin combinations and concentrations. It was found that culture medium caused statistically important differences in number of nodes, number of fully expanded leaves, number of multiple shoots, number of roots, and length of shoots. MS medium supplemented with 1.0 mg BA/liter in combination with 0.01 mg NAA/L was found to be the best medium for shoot growth and callus production. MS medium supplemented with the combination of 0.5 mg BA/L and 0.01 mg NAA/L was the best medium for explant rooting. The medium containing BA and NAA encouraged better shoot growth than those containing BA alone. When the concentration of BA in the medium was increased, multiple shoot proliferation and teratological structures of explants increased, but the number of small leaves and length of internode decreased. Axillary bud culture led to better shoot growth than was found for shoot apex culture. The presence of leaves positively affected shoot growth from axillary buds. Also placing the axillary buds horizontally onto the medium gave better shoot proliferation and growth than placing them vertically.

Synergistic in-vitro anthelmintic potentials of Vernonia amygdalina Delile stem and Carica papaya Lin. seeds

2017 ◽  
Author(s):  
A Quartey ◽  
A Oppong ◽  
I Ayensu ◽  
J Apenteng ◽  
D Mintah ◽  
...  
Keyword(s):  
Carica Papaya ◽  
Vernonia Amygdalina

Phytochemical analysis and salivary amylase inhibition activities of Carica papaya leaf and Garcinia mangostana pericarp extracts and partially purified fractions

2017 ◽  
Vol 6 (1) ◽  
pp. 34
Author(s):  
Michael Russelle Alvarez ◽  
Paolo Robert Bueno ◽  
Raymond Oliver Cruz ◽  
Richard Macapulay ◽  
Francis Jayson Vallesfin ◽  
...  
Keyword(s):  
Crude Extract ◽  
Carica Papaya ◽  
Uv Light ◽  
Digestive Enzyme ◽  
Phytochemical Analysis ◽  
Phytochemical Screening ◽  
Salivary Amylase ◽  
Garcinia Mangostana ◽  
Leaf Extracts

Plant-derived digestive enzyme inhibitors particularly those targeted to carbohydrate metabolism has been the focus of recent studies as natural supplements for weight control and diabetes. The present study explores the salivary amylase inhibition activity of Garcinia mangostana (Linn.) pericarp extracts and Carica papaya (Linn.) leaf extracts and fractions, as well as perform phytochemical screening and quantification, and thin layer – and high performance liquid chromatographic profiling. ­Results show that crude extracts and purified fractions were able to inhibit salivary amylase, with C. papaya fraction 1 being the most active at 30.89% inhibition. Phytochemical screening of all extracts tested ­positive for tannins, glycosides, phenolics, flavonoids and alkaloids. Quantification of phenolics showed that extracts contained high levels of phenolics, with C. papaya crude extract having the highest content with 219.0±12.7 mg GAE/g extract followed by G. mangostana crude extract with 247.1±18.0 mg GAE/g extract. Quantification of total flavonoids also showed C. papaya crude extract to contain the highest content with 55.12±0.679 mg QE/g extract. All extracts contained negligible alkaloid content, though. HPLC and TLC profiling showed several peaks and bands, when viewed in 210 nm and UV light, respectively. These results demonstrate in vitro the salivary amylase inhibitory activity of both plants and their potential as antidiabetic drug candidates; however, further studies need to be done, like isolation and structure elucidation of active components and toxicity assays. Keywords: Amylase inhibition, phytochemical quantification, Carica papaya, Garcinia mangostana

scholarly journals Carica papaya induces in vitro thrombopoietic cytokines secretion by mesenchymal stem cells and haematopoietic cells

2015 ◽  
Vol 15 (1) ◽  
Author(s):  
Jazli Aziz ◽  
Noor Lide Abu Kassim ◽  
Noor Hayaty Abu Kasim ◽  
Nazmul Haque ◽  
Mohammad Tariqur Rahman
Keyword(s):  
Stem Cells ◽  
Mesenchymal Stem Cells ◽  
Carica Papaya ◽  
Haematopoietic Cells ◽  
Cytokines Secretion

Papaya shoot tip associated endophytic bacteria isolated from in vitro cultures and host–endophyte interaction in vitro and in vivo

2007 ◽  
Vol 53 (3) ◽  
pp. 380-390 ◽  
Author(s):  
Pious Thomas ◽  
Sima Kumari ◽  
Ganiga K. Swarna ◽  
T.K.S. Gowda
Keyword(s):  
Culture Medium ◽  
Carica Papaya ◽  
In Vitro Cultures ◽  
Dependent Manner ◽  
16S Rdna Sequence ◽  
16S Rdna Sequence Analysis ◽  
Single Organism ◽  
Dose Dependent

Fourteen distinct bacterial clones were isolated from surface-sterilized shoot tips (~1 cm) of papaya (Carica papaya L. ‘Surya’) planted on Murashige and Skoog (MS)-based papaya culture medium (23/50 nos.) during the 2–4 week period following in vitro culturing. These isolates were ascribed to six Gram-negative genera, namely Pantoea ( P. ananatis ), Enterobacter ( E. cloacae ), Brevundimonas ( B. aurantiaca ), Sphingomonas , Methylobacterium ( M. rhodesianum ), and Agrobacterium ( A. tumefaciens ) or two Gram-positive genera, Microbacterium ( M. esteraromaticum ) and Bacillus ( B. benzoevorans ) based on 16S rDNA sequence analysis. Pantoea ananatis was the most frequently isolated organism (70% of the cultures) followed by B. benzoevorans (13%), while others were isolated from single stocks. Bacteria-harboring in vitro cultures often showed a single organism. Pantoea, Enterobacter, and Agrobacterium spp. grew actively on MS-based normal papaya medium, while Microbacterium, Brevundimonas, Bacillus, Sphingomonas, and Methylobacterium spp. failed to grow in the absence of host tissue. Supplying MS medium with tissue extract enhanced the growth of all the organisms in a dose-dependent manner, indicating reliance of the endophyte on its host. Inoculation of papaya seeds with the endophytes (20 h at OD550 = 0.5) led to delayed germination or slow seedling growth initially. However, the inhibition was overcome by 3 months and the seedlings inoculated with Pantoea, Microbacterium, or Sphingomonas spp. displayed significantly better root and shoot growths.

In vitro somatic embryogenesis from suspension cultures of Carica papaya L.

2012 ◽  
Vol 136 ◽  
pp. 43-49 ◽  
Author(s):  
R. Anandan ◽  
D. Sudhakar ◽  
P. Balasubramanian ◽  
Antonia Gutiérrez-Mora
Keyword(s):  
Somatic Embryogenesis ◽  
Carica Papaya ◽  
Suspension Cultures

Selectivity of auxin for induction and growth of callus from excised embryo of spring and winter wheat

1984 ◽  
Vol 62 (7) ◽  
pp. 1393-1397 ◽  
Author(s):  
M. D. Zhou ◽  
T. T. Lee
Keyword(s):  
Winter Wheat ◽  
Chinese Spring ◽  
Shoot Growth ◽  
Callus Formation ◽  
Triticum Aestivum L ◽  
Dichlorophenoxyacetic Acid ◽  
Naphthaleneacetic Acid ◽  
2,4 Dichlorophenoxyacetic Acid ◽  
Methoxybenzoic Acid

The callus-promoting activity of most commonly known as well as some rarely tested auxins was compared with that of 2,4-dichlorophenoxyacetic acid (2,4-D) for in vitro culture of the excised embryo of spring and winter wheat (Triticum aestivum L.), cv. Chinese Spring and cv. Fredrick. Different auxins in a concentration range from 1 to 50 μM showed widely different activities. Also the two wheat cultivars responded differently to the auxins. When rapid callus formation with limited root growth was used as the basis for comparison, 2-(2-methyl-4-chlorophenoxy)propionic acid (2-MCPP), α-naphthaleneacetic acid, 3,6-dichloro-2-methoxybenzoic acid (dicamba), 4-amino-3,5,6,trichloropicolinic acid (picloram), γ-(2,4-dichlorophenoxy)butyric acid, 2,4,5-trichlorophenoxyacetic acid, and 2,4,5-trichlorophenoxypropionic acid, in the order of effectiveness, were superior to 2,4,-D for callus induction from the embryo of 'Chinese Spring,' although the concentration required was higher than that of 2,4-D. For the winter wheat 'Fredrick,' however, only picloram, dicamba, and 2-MCPP performed as well as 2,4-D. All auxins tested promoted shoot growth; 2-methyl-4-chlorophenoxypropionic acid was most effective for 'Chinese Spring,' whereas picloram was most effective for 'Fredrick.'

In Vitro Polyembryony in Carica papaya L. Ovules

1981 ◽  
Vol 104 (3) ◽  
pp. 285-288 ◽  
Author(s):  
Richard E. Litz ◽  
Robert A. Conover
Keyword(s):  
Carica Papaya
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