scholarly journals Carbon Dioxide Enrichment during Photoautotrophic Micropropagation of Protea cynaroides L. Plantlets Improves In Vitro Growth, Net Photosynthetic Rate, and Acclimatization

HortScience ◽  
2013 ◽  
Vol 48 (10) ◽  
pp. 1293-1297 ◽  
Author(s):  
How-Chiun Wu ◽  
Chun-Chih Lin
Keyword(s):  
Dry Weight ◽  
Control Treatment ◽  
Dry Matter Accumulation ◽  
Ms Medium ◽  
In Vitro Growth ◽  
Shoot Dry Weight ◽  
Survival Percentage ◽  
Photoautotrophic Micropropagation ◽  
Photosynthetic Ability

The effects of CO2 enrichment on the in vitro growth and acclimatization of Protea cynaroides L. plantlets were investigated. Three CO2 enrichment concentrations were used: 0 (control), 1000, 5000, and 10000 μmol·mol−1. Plantlets in the control treatment were cultured on half-strength Murashige and Skoog (MS) medium supplemented with sucrose, whereas those enriched with different CO2 concentrations were grown on sucrose-free MS medium. Compared with the control, significant improvements were observed in the growth of plantlets enriched with CO2 irrespective of the concentration. Plantlets enriched with 5000 μmol·mol−1 CO2 produced the highest number of leaves and the largest leaf area. In addition, the photosynthetic ability of plantlets enriched with CO2 was enhanced, which resulted in significant increases in shoot growth and dry matter accumulation. In particular, the shoot dry weight of plantlets cultured in 5000 μmol·mol−1 CO2 and 10000 μmol·mol−1 CO2 were, respectively, 2.1 and 4.2 times higher than those without CO2 enrichment. During acclimatization, the survival percentage, rooting percentage, and leaf number of plantlets grown in elevated CO2 were, respectively, up to 4.5, 1.8, and 2.7 times higher than plantlets without CO2 enrichment. The improvements in survival percentage and ex vitro growth of these plantlets were the result of their enhanced photosynthetic ability in vitro, which resulted in the production of high-quality plantlets. Significant improvements in the overall growth of P. cynaroides plantlets were achieved through the use of photoautotrophic micropropagation with CO2 enrichment.

scholarly journals Growth and Photosynthetic Capability of Momordica grosvenori Plantlets Grown Photoautotrophically in Response to Light Intensity

HortScience ◽  
2009 ◽  
Vol 44 (3) ◽  
pp. 757-763 ◽  
Author(s):  
Meijun Zhang ◽  
Duanduan Zhao ◽  
Zengqiang Ma ◽  
Xuedong Li ◽  
Yulan Xiao
Keyword(s):  
Callus Formation ◽  
Dry Weight ◽  
Control Treatment ◽  
Photon Flux ◽  
Photon Flux Density ◽  
Naphthaleneacetic Acid ◽  
Ms Medium ◽  
Light Intensities ◽  
Four Levels

Momordica grosvenori plantlets were cultured in vitro for 26 d on sucrose- and hormone-free Murashige and Skoog (MS) medium with four levels of photosynthetic photon flux density (PPFD), namely 25, 50, 100, or 200 μmol·m−2·s−1, and a CO2 concentration of 1000 μmol·mol−1 in the culture room [i.e., photoautotrophic micropropagation (PA) treatments]. The control treatment was a photomixotrophic culture using MS medium containing sucrose and NAA with a CO2 concentration of 400 μmol·mol−1 in the culture room and a PPFD of 25 μmol·m−2·s−1. Based on the results, a second experiment was conducted to investigate the effects of α-naphthaleneacetic acid (NAA) and sucrose on callus formation. For this, plantlets were grown in the absence and presence of either NAA or sucrose. Compared with the control, the PA plantlet had a well-developed rooting system, better shoot, greater chlorophyll content, and higher electron transport rate and the ex vitro survival percentage was increased by 31%. Both sucrose and NAA stimulated callus formation on the shoot bases of control plantlets, whereas calluses did not form on the plantlets grown in sucrose- and hormone-free medium. The stronger light intensities increased the fresh and dry weight of plantlets. A PPFD of 100 μmol·m−2·s−1 was more suitable for the growth of M. grosvenori plantlets. Therefore, photoautotrophic plantlets grown at high light intensities would be better suited to the intense irradiance found in sunlight.

scholarly journals In vitro growth of Brassocattleya orchid hybrid in different concentrations of KNO3, NH4NO3 and benzylaminopurine

2011 ◽  
Vol 29 (3) ◽  
pp. 359-363 ◽  
Author(s):  
Jean C Cardoso ◽  
Elizabeth O Ono
Keyword(s):  
Tissue Culture ◽  
Plant Tissue Culture ◽  
Plant Tissue ◽  
Ornamental Plants ◽  
Dry Weight ◽  
Ms Medium ◽  
In Vitro Growth ◽  
Mass Propagation ◽  
Mineral Salts

One of the most important applications of plant tissue culture is mass propagation of ornamental plants. This experiment evaluated the effect of different concentrations of NH4NO3 and KNO3 and BAP on the in vitro growth of orchid hybrid Brassocattleya 'Pastoral'. Seedlings of this orchid hybrid were used as explants and cultivated in medium with mineral salts and vitamins from the MS medium (Murashige & Skoog, 1962), with the macronutrients P, Ca and Mg reduced by half, and with an addition of 25 g L-1 of sucrose, 0.1 g L-1 of myo-inositol and 1.5 g L-1 of activated charcoal. Agar-agar was added (6.5 g L-1) and the pH was adjusted to 5.8. As treatments, four concentrations of the NH4NO3 and KNO3 (2x; 1x; ½ and ¼ MS medium) and three concentrations of BAP (0.0; 0.5 and 1.0 mg L-1) were assayed. The multiplication, growth in height, fresh and dry weight and sugar level in dry weight of sprouts were evaluated. There occurred a higher growth in height with 0.25x NH4NO3 and KNO3 salts concentrations of MS medium and higher rate of multiplication with combination of NH4NO3 and KNO3 reduced by half of the MS medium concentration and 1.0 mg L-1 BAP.

scholarly journals Influence of sucrose and tyrosine on callus induction and morphine and codeine production on Papaver somniferum In vitro

2010 ◽  
Vol 4 (2) ◽  
pp. 45-53
Author(s):  
M . S . Hamad ◽  
I. A. Hamza ◽  
S . A . Al-Muktar
Keyword(s):  
Tissue Culture ◽  
Callus Induction ◽  
Drug Research ◽  
Dry Weight ◽  
Papaver Somniferum ◽  
Research Center ◽  
Control Treatment ◽  
Ms Medium ◽  
College Of Agriculture

A study was conducted at the tissue culture lab. College of Agriculture/ University of Baghdad and Drug Research Center/ Health Minstry during 2006 - 2007. Results indicated that MS medium supplemented with 30 g/l of sucrose gave the highest values (630.3, 61.6) mg of both fresh and dry weight of callus respectively. However, values of both parameters were reduced with increasing sucrose concentrations up to 60, 90, 120 g/l (478.2, 346.5, 217.6) mg respectively. MS medium supplemented with 30 mg/l of tyrosine gave the highest values of callus fresh and dry weight (429.7, 42.6) mg respectively. MS medium supplemented with 30 g/l of sucrose and 30 mg/L tyrosine gave the highest values (688.0, 67.5) mg of both fresh and dry weight callus. MS medium supplemented with 30 mg/l of tyrosine and 90 g/l of sucrose gave the highest values (2.9, 2.8) mg/g of morphine and codeine from fresh callus weight respectively while the lowest values of morphine and codeine (0.5K 0.2) mg/g from fresh callus weight respectively of control treatment .

scholarly journals The effect of gamma radiation on callus growth and plantlet regeneration of four tomato hybrid Lycopersicon esculentum mill In vitro

2009 ◽  
Vol 3 (1) ◽  
pp. 56-62
Author(s):  
AssRana A.H. Al-roomia
Keyword(s):  
Lycopersicon Esculentum ◽  
Gamma Radiation ◽  
Dry Weight ◽  
Plantlet Regeneration ◽  
Callus Growth ◽  
Control Treatment ◽  
Ms Medium ◽  
Lycopersicon Esculentum Mill

Calluses were induced from four tomato hybrid (Davista, superDavista, Muntcarloo,Hymar). On MS medium supplemented with 2, 4-D Auxin at concentration of 4 mg/L.The Callus were divided into two groups the first one was affected with gammaradiation at the doses (0,2,4,6,8)Gray and re cultured on the same mentioned medium.The second group was also affected with gamma radiation with the same dosesmentioned above and re- cultured on MS media supplemented with 0.5 mg/L Kinetinfor regeneration. Fresh and dry weight was measured after 8 weeks. The number andlength of shoots were measured as indicators after 6 weeks. Results revealed that thedose 2 Gray was superior to give highest rate of fresh and dry weight reaching 238.5and 43.1 mg respectively and the hybrid super Davista was superior in giving thehighest fresh and dry weight reaching 231.6 and 30.2 mg respectively. Moreover theresults revealed that control treatment was superior in giving the highest rate innumber and length of plantlets. The 2 Gray treatment showed a significant effect onthe rate and length of plantlets. In addition, there were significant differences amongthe cultivars in most characters mentioned above.

scholarly journals Antimycotal Activity of Collimonas Isolates and Synergy-Based Biological Control of Fusarium Wilt of Tomato

2020 ◽  
Vol 4 (1) ◽  
pp. 64-74 ◽  
Author(s):  
Hung K. Doan ◽  
Nilesh N. Maharaj ◽  
Kaitlyn N. Kelly ◽  
Eugene M. Miyao ◽  
R. Michael Davis ◽  
...  
Keyword(s):  
Fusarium Wilt ◽  
Field Experiments ◽  
Pathogenic Fungi ◽  
Dry Weight ◽  
Control Treatment ◽  
Protective Properties ◽  
Shoot Dry Weight ◽  
Geographic Origins ◽  
Wide Range

In a continued effort to discover microorganisms with plant-protective properties, we characterized a collection of bacterial isolates from multiple geographic origins and belonging to the genus Collimonas, for their ability to inhibit in vitro the growth of a wide range of plant-pathogenic fungi and oomycetes. Isolate Collimonas arenae Cal35 showed the greatest all-round performance and was the single-best inhibitor of several of the tested pathogens, including Fusarium oxysporum f. sp. lycopersici, the causal agent of Fusarium wilt of tomato. In greenhouse trials, neither C. arenae Cal35 nor the control treatment, i.e., the commercially available Bacillus-based biofungicide Serenade Soil, was able to prevent symptom formation on tomato plants challenged with F. oxysporum f. sp. lycopersici. However, a mixture of Cal35 and Serenade Soil (referred to as Collinade) significantly reduced vascular discoloration and F. oxysporum f. sp. lycopersici-induced loss of shoot dry weight. In replicated field experiments, a Collinade application reduced vascular symptoms as well as the relative abundance of F. oxysporum in the root endosphere of F. oxysporum f. sp. lycopersici-challenged plants. We discuss the emerging property of “biocombicontrol” by Collimonas and Bacillus in the context of synergy-based formulations for the protection of crops against pathogens.

scholarly journals MODIFICAÇÕES NO MEIO DE CULTURA, FOTOPERÍODO E TEMPO DE CULTIVO AFETAM O ALONGAMENTO E ENRAIZAMENTO IN VITRO DE BANANEIRA CV. PACOVAN

Nativa ◽  
2018 ◽  
Vol 6 (1) ◽  
pp. 27
Author(s):  
Marcos Vinícius Marques Pinheiro ◽  
Ana Cristina Portugal Pinto De Carvalho ◽  
Fabrina Bolzan Martins
Keyword(s):  
Plant Height ◽  
Culture Medium ◽  
Culture Media ◽  
Dry Weight ◽  
Salt Mixture ◽  
Musa Spp ◽  
Fresh Biomass ◽  
Shoot Dry Weight ◽  
Number Of Leaves

No intuito de elevar as taxas de sobrevivência durante a etapa de aclimatização e posterior plantio a campo, avaliou-se o enraizamento in vitro de bananeira cv. Pacovan, em diferentes concentrações de sais MS e de sacarose. Utilizou-se DIC, esquema fatorial (6x2x3), com seis meios de cultura [sendo três concentrações de nutrientes do meio MS (100%; 50% de macronutrientes; e 50% dos sais macro e micronutrientes), e duas concentrações de sacarose (1,5/3,0%)], dois fotoperíodos (12/16 h) e três tempos de cultivo (21, 28 ou 35 dias) e seis repetições/tratamento. Analisaram-se: altura da planta, número de folhas/planta, massas frescas e secas das partes aérea e radicular. Para altura da planta, massa fresca da parte aérea e radicular, o meio MS 50% dos sais + sacarose (1,5%) com fotoperíodo de 16 h e tempo de cultivo de 35 dias foi satisfatório. Para massa seca da parte aérea foi MS 50% de sais + sacarose (3%), e para massa seca da parte radicular, MS 100% + sacarose (3%) (em 12hs/28 dias e 16hs/21 dias). Para o alongamento/enraizamento in vitro da bananeira cv. Pacovan sugere-se MS 50% de sais (macro e micronutrientes), redução ou manutenção de sacarose (1,5 ou 3%) em 16h/35 dias de cultivo.Palavra-chave: Musa spp., propagação in vitro, sistema radicular. CHANGES IN CULTURE MEDIUM, PHOTOPERIOD AND TIME OF CULTIVATION AFFECT THE IN VITRO ELONGATION AND ROOTING OF BANANA CV. PACOVAN ABSTRACT:In order to achieve high rates of survival during the acclimatization and later planting in the field, was evaluated the in vitro of banana cv. Pacovan plants under different concentrations of sucrose and MS basal salt mixture. The experiment was assembled in a DIC, in 6x2x3, six different culture media [three different MS salt mixture concentrations (100%; 50% of macronutrients; and 50% of macro/micronutrients) and two sucrose concentrations (1.5/3%)], two photoperiods (12/16 hours) and three cultivation times (21, 28 or 35 days). Each treatment was composed by 6 replicates. Plant height, number of leaves/plant, fresh and dry weight of roots and shoots, were analyzed. Satisfactory results for plant height and shoot and root fresh biomass were observed in MS with macro/micronutrients (50%) + sucrose (3%), 16 hours/35 days. The highest values of shoot dry weight were observed in MS with macro/micronutrients (50%) + sucrose (3%); the highest root dry weight was achieved with MS 100% + sucrose (3%) (12hs/28 and 16hs/21 days). The suggested medium for the in vitro elongation and rooting stage of banana cv. Pacovan is the MS with 50% of salts (macro and micronutrients), reduction or maintenance of sucrose (1.5 or 3%) in 16h/35 days of cultivation.Keywords: Musa spp., in vitro propagation, root system. DOI:

scholarly journals Growth of mango (Mangifera indica L.) rootstocks as influenced by pre-sowing treatments

2017 ◽  
Vol 9 (1) ◽  
pp. 582-586
Author(s):  
R. J. Patel ◽  
T. R. Ahlawat ◽  
A. I. Patel ◽  
J. J. Amarcholi ◽  
B. B. Patel ◽  
...  
Keyword(s):  
Aqueous Solutions ◽  
Root Length ◽  
Mangifera Indica ◽  
Lateral Roots ◽  
Weight Ratio ◽  
Dry Weight ◽  
Shoot Length ◽  
Shoot Dry Weight ◽  
Survival Percentage ◽  
Total Dry Weight

An experiment was carried out at Navsari Agricultural University, Navsari during 2014 to evaluate the effect of pre-sowing treatments on survival percentage and growth of mango rootstocks. Mango stones were soaked in aqueous solutions of GA3 (100 and 200 ppm), Beejamruth (2 % and 3 %) and Thiourea (1 % and 2 %) for 12 and 24 hours. The trial was evaluated in Completely Randomized Design based on factorial concept and the treatments were replicated thrice. Imposition of treatments led to significant differences at 5 % level of significance for all parameters chosen in this study. Mango stones when treated with Thiourea at 1 % had the maximum shoot length (49.93 cm), root length (34.38 cm), shoot dry weight (21.08 g) and total dry weight (26.36 g). The highest number of lateral roots (10.90) and survival percentage (64.17) was observed in mango stones dipped in 100 ppm GA3. Between the two soaking duration, soaking mango stones for 24 hours recorded higher values for shoot length (45.03 cm), root length (32.79 cm), number of lateral roots (9.83), survival percentage (62.72), shoot root fresh weight ratio (4.30), shoot dry weight (21.33 g), total dry weight (26.28 g) and shoot root dry weight ratio (4.32). Thus, survival percentage and growth of mango rootstocks can be substantially improved by soaking mango stones in aqueous solutions of 100 ppm GA3 or Thiourea at 1 % for 24 hours before sowing.

scholarly journals Effect of N-methyl-N-nitro-N-nitrosoguanidine (NTG) on callus induction and survival rate on mature embryos of beans (Phaseolus vulgaris)

2009 ◽  
Vol 3 (2) ◽  
pp. 91-98
Author(s):  
Sattar A. Shlahi ◽  
Zahra N. Hashim Al- Hattab
Keyword(s):  
Survival Rate ◽  
Callus Induction ◽  
Indole Acetic Acid ◽  
Casein Hydrolysate ◽  
Dry Weight ◽  
Ms Medium ◽  
Fresh Weight ◽  
Benzyl Adenine ◽  
Mature Embryos ◽  
Survival Percentage

This research was conducted to study the effect of the chemical mutagen N-methyl-N-nitro-N-nitrosoguanidine on the percentage of callus induction and survival from mature beans embryos harvester cultivar. Seeds were treated with (0.2 or 0.4) millimolar of the mutagen NTG in combination with 0.0, 4 or 8% of ethanol, pH 5 ±2 0. for 24 h. Calli were induced on mature embryos by using MS medium with 0.5 mg/l of Benzyl adenine (BA), 1 mg/l Indole acetic acid (IAA) and 100 mg/l from each of Casein hydrolysate, Glycine, Asparagine, Tyrosine, and Myo-Inositol. Results showed that the hypocotyl surpassed the radical and the plume significantly in terms of survival reached 56.3%. Mutagen treatments showed asignificant effect on calli survival. Treatment with 8% Ethanol was lethal for all explants. While treatment with 0.4 mM NTG without Ethanol gaved the highest survival rate. The interaction between the treatments and the explants showed that the lowest survival percentage was which 8.8% that was for shoots treated with 0.2 mM of 4% Ethanol. Calli induced on hypocotyls treated with 0.4 mM NTG without Ethanol gave the highest fresh weight (347.2) mg while the lowest was (60) mg for calli induced on the radical treated with 0.4 mM NTG with 4% Ethanol. Moreover the highest dry weight was 22.5 mg for calli induced from hypocotyls treated with 0.4 millimolar NTG without Ethanol that was higher than the control 17.2 mg.The lowest dry weight obtained from calli induced on the radical treated with 0.4 mM NTG with 4% Ethanol was 3 mg. In conclusion the results showed that 0.4 mM NTG without Ethanol gave the highest survival rate and the highest fresh and dry weight for calli induced on the hypocotyl.

scholarly journals Antagonistic effectiveness of some bacteria against Fusarium graminearum causing crown rot disease on wheat (Triticum aestivum)

2021 ◽  
Vol 13 (1) ◽  
pp. 69-80
Author(s):  
Majida Hadi Mahdi Alsaady ◽  
Hussein Ali Salim ◽  
Rakib A. Al-ani ◽  
Hadi M. Aboud ◽  
Jamal Talib M Al Roubaie
Keyword(s):  
Fusarium Graminearum ◽  
Culture Method ◽  
Dry Weight ◽  
Antagonistic Effect ◽  
Crown Rot ◽  
Control Treatment ◽  
Enzyme Analysis ◽  
Dual Culture ◽  
Rot Disease

In this study, the antagonistic effect of five bacteria genera namely Bacillus, Pseudomonas, Azotobacter, Azospirillum, and Streptomyces isolated from rhizosphere of wheat were evaluated against Fusarium graminearum as potential biocontrol agents in vitro. F. graminearum was molecularly diagnosed using the Polymerase chain reaction (PCR) technique. Each bacteria were tested for the production of catalase enzyme, oxidase enzyme, analysis of starch, analyze of gelatin, and the motility, where Azotobacter, Azospirillum, and Bacillus subtilis were positive for all tested. Fungal inhibition tests were performed by using the dual culture method and agar well diffusion technique. Among them, Streptomyces and Azospirillum exhibited potent inhibition to the growth of F. graminearum (72.14% and 66.42%) respectively, followed by B.pumillus, P.fluorescens, B. subtilis and Azotobacter ( 58.28%, 43.23%, 39.71% and 35.71%) respectively as compared with the control treatment (0.0%).The dry weight of the fungus biomass was decreased with bacteria P. fluorescens, Streptomyces sp, Azotobacter sp, Azospirillum sp, B. subtilis, and B. pumillus which reached (0.114, 0.103, 0.147, 0.101, 0.143, and 0.107 g) respectively compared to the control treatment that was 0. 665 g.

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