β-Oxidation of certain growth regulators by plant tissues

1970 ◽  
Vol 1 (4) ◽  
pp. 132-137 ◽  
Author(s):  
J. L. Garraway
Keyword(s):  
Growth Regulators ◽  
Plant Tissues

Micro propagation of Adiantum Capillus plant through a culture of plant spores

2020 ◽  
Vol 2 (1) ◽  
pp. 48-56
Author(s):  
Salem Hammud ◽  
Moohamed Abosneena ◽  
Munder Abugnia ◽  
Ahmed Shaaban ◽  
Adel Elmograbi
Keyword(s):  
Growth Regulators ◽  
Plant Tissues ◽  
Endangered Plants ◽  
Benzyl Adenine ◽  
Sand Mixture ◽  
Biotechnology Research ◽  
Nutritional Medium ◽  
Growth Room ◽  
Micro Propagation ◽  
Culture Technology

This experiment was conducted in Biotechnology research center BTRC for the purpose of studying the possibility of propagate Adiantum Capillus plant by using spores through plant tissues culture technology, which is one of the endangered plants in Libya. MS media was used in this study supplemented with some growth regulators (cytokines) of benzyl adenine BA and Kinten K at different concentrations (0.0, 0.5, 1.0, 2.0) mg / l. The results indicate that the growth of spores represented by the increase in the length and size of the vegetative masses in the MS nutritional medium equipped with BA growth regulator at a concentration of 2.0 mg / l is significantly higher than other treatments. The obtained plants were adapted by using growth medium of the Betmos and sand mixture in a ratio of 1: 2 in the growth room. The branches and roots formed when the plant moved to the greenhouse in the same medium of development

scholarly journals USE OF FORCING SOLUTIONS TO STUDY PLANT GROWTH REGULATOR EFFECTS ON VANHOUTTE'S SPIRAEA CULTURED IN VITRO

HortScience ◽  
1990 ◽  
Vol 25 (9) ◽  
pp. 1124e-1124
Author(s):  
Guochen Yang ◽  
P. E. Read
Keyword(s):  
Plant Physiology ◽  
Plant Growth ◽  
Growth Regulators ◽  
Growth Regulator ◽  
Plant Growth Regulator ◽  
Woody Plant ◽  
Shoot Proliferation ◽  
Plant Tissues ◽  
Forcing Solution

Vanhoutte's spiraea has been propagated in vitro using explants from softwood growth of dormant stems forced in a solution containing 200 mg/l 8-hydroxyquinoline citrate (8-HQC) and 2% sucrose (Yang and Read, 1989). Objectives to further utilize this system were to determine the feasibility of applying plant growth regulators (PGR) via the forcing solution to softwood growth from forced dormant stems and to study the resulting influence on in vitro culture. BA and GA3 were placed in the forcing solution at various concentrations, including a zero PGR control. Explants were cultured on Linsmaier and Skoog (LS) medium containing zero PGR or different amounts of BA or thidiazuron (TDZ) or combinations of BA and IAA. Control explants placed on LS medium supplemented with 5uM BA with or without 1 or 5uM IAA, or with 0.5 or 0.75 uM TDZ alone produced the best shoot proliferation. BA in the forcing solution stimulated micropropagation, while GA3 caused less proliferation than explants from control solutions. Forcing solutions containing PGR are useful for manipulating responses of plant tissues cultured in vitro and for studying PGR influence on woody plant physiology.

scholarly journals Influence of plant growth regulators and nitrogen sources on the production and development of Brachiaria decumbens cv. Basilisk

2018 ◽  
Author(s):  
Leone Campos Rocha ◽  
Fábio Andrade Teixeira ◽  
Márcio dos Santos Pedreira ◽  
Daniela Deitos Fries ◽  
Evely Giovanna Leite Costa ◽  
...  
Keyword(s):  
Plant Growth ◽  
Plant Growth Regulators ◽  
Growth Regulators ◽  
Mass Production ◽  
Dry Mass ◽  
N Fertilization ◽  
Plant Tissues ◽  
Initial Growth ◽  
Soil N ◽  
Brachiaria Decumbens

ABSTRACTThe aim was to evaluate the effect of seed treatment with plant growth regulators and nitrogen fertilization methods in Brachiaria decumbens cv. Basilisk on the growth and development through germinative characteristics, dry matter yield and physiological composition. Plant growth regulators increased germination and mass yields of plant structures in coated seeds. From the regression estimates, higher germination percentages and root dry mass production were obtained with the use of Plant growth regulators for the initial growth (10.3; 12.8 mL.kg−1 seed, respectively). Leaf and pseudostem mass production had a significant interaction effect between seed type and the use of growth regulator. Coated seeds had greater performance with absence or at lower levels of growth regulators, and embryo quality contributed to the greater formation of plant tissues. More efficient levels (8.85 and 9.57 mL.kg−1 seed) were observed for the yields of plant structures (leaf and pseudostem). Soil N-fertilization resulted in higher dry mass productions of leaf, stem, shoot and root, as well as for root volume. Rates of photoassimilate were increased by soil fertilization and use of plant growth regulators. The use of exogenous hormonal compounds acts on the organogenesis of plant tissues and increases the development of Brachiaria decumbens cv. Basilisk. Soil N-fertilization increase mass yields as it maximizes photosynthetic processes and growth rates.

Microscopy studies of powdery mildew on summer squash

1991 ◽  
Vol 49 ◽  
pp. 520-521
Author(s):  
John S. Gardner ◽  
W. M. Hess
Keyword(s):  
Powdery Mildew ◽  
Tip Growth ◽  
Hyphal Growth ◽  
Plant Tissues ◽  
Vegetative Hypha ◽  
Powdery Mildews ◽  
Summer Squash ◽  
Conidial Formation ◽  
Polar Tip Growth ◽  
Short Conidiophore

Powdery mildews are characterized by the appearance of spots or patches of a white to grayish, powdery, mildewy growth on plant tissues, entire leaves or other organs. Ervsiphe cichoracearum, the powdery mildew of cucurbits is among the most serious parasites, and the most common. The conidia are formed similar to the process described for Ervsiphe graminis by Cole and Samson. Theconidial chains mature basipetally from a short, conidiophore mother-cell at the base of the fertile hypha which arises holoblastically from the conidiophore. During early development it probably elongates by polar-tip growth like a vegetative hypha. A septum forms just above the conidiophore apex. Additional septa develop in acropetal succession. However, the conidia of E. cichoracearum are more doliform than condia from E. graminis. The purpose of these investigations was to use scanning electron microscopy (SEM) to demonstrate the nature of hyphal growth and conidial formation of E. cichoracearum on field-grown squash leaves.

Localization of acid phosphatases in root cap of rice plant

1991 ◽  
Vol 49 ◽  
pp. 224-225
Author(s):  
Y. R. Chen ◽  
Y. F. Huang ◽  
W. S. Chen
Keyword(s):  
Rice Plant ◽  
Developmental Stages ◽  
Uranyl Acetate ◽  
Root Cap ◽  
Plant Tissues ◽  
Acid Phosphatases ◽  
Root Tips ◽  
Buffer Solution ◽  
Cacodylate Buffer ◽  
Ethanol Series

Acid phosphatases are widely distributed in different tisssues of various plants. Studies on subcellular localization of acid phosphatases show they might be present in cell wall, plasma lemma, mitochondria, plastid, vacuole and nucleus. However, their localization in rice cell varies with developmental stages of cells and plant tissues. In present study, acid phosphatases occurring in root cap are examined.Sliced root tips of ten-day-old rice(Oryza sativa) seedlings were fixed in 0.1M cacodylate buffer containing 2.5% glutaraldehyde for 2h, washed overnight in same buffer solution, incubated in Gomori's solution at 37° C for 90min, post-fixed in OsO4, dehydrated in ethanol series and finally embeded in Spurr's resin. Sections were doubly stained with uranyl acetate and lead citrate, and observed under Hitachi H-600 at 75 KV.

Cryosectioning plant roots prepared by high-pressure freezing

1987 ◽  
Vol 45 ◽  
pp. 662-663
Author(s):  
R.E. Crang ◽  
M. Mueller ◽  
K. Zierold
Keyword(s):  
High Pressure ◽  
Cell Walls ◽  
Plant Tissues ◽  
Ice Crystal ◽  
High Pressure Freezing ◽  
Vitreous State ◽  
Radial Depth ◽  
Irregular Topography ◽  
Considerable Depth ◽  
Conventional Freezing

Obtaining frozen-hydrated sections of plant tissues for electron microscopy and microanalysis has been considered difficult, if not impossible, due primarily to the considerable depth of effective freezing in the tissues which would be required. The greatest depth of vitreous freezing is generally considered to be only 15-20 μm in animal specimens. Plant cells are often much larger in diameter and, if several cells are required to be intact, ice crystal damage can be expected to be so severe as to prevent successful cryoultramicrotomy. The very nature of cell walls, intercellular air spaces, irregular topography, and large vacuoles often make it impractical to use immersion, metal-mirror, or jet freezing techniques for botanical material.However, it has been proposed that high-pressure freezing (HPF) may offer an alternative to the more conventional freezing techniques, inasmuch as non-cryoprotected specimens may be frozen in a vitreous, or near-vitreous state, to a radial depth of at least 0.5 mm.

The role of silicon in forages: A quantitative X-Ray study

1987 ◽  
Vol 45 ◽  
pp. 416-417
Author(s):  
Janet H. Woodward ◽  
D. E. Akin
Keyword(s):  
Sodium Acetate ◽  
Dry Matter ◽  
Acetate Buffer ◽  
Plant Tissues ◽  
Sodium Acetate Buffer ◽  
X Ray ◽  
Dry Matter Digestibility ◽  
Percent Composition

Silicon (Si) is distributed throughout plant tissues, but its role in forages has not been clarified. Although Si has been suggested as an antiquality factor which limits the digestibility of structural carbohydrates, other research indicates that its presence in plants does not affect digestibility. We employed x-ray microanalysis to evaluate Si as an antiquality factor at specific sites of two cultivars of bermuda grass (Cynodon dactvlon (L.) Pers.). “Coastal” and “Tifton-78” were chosen for this study because previous work in our lab has shown that, although these two grasses are similar ultrastructurally, they differ in in vitro dry matter digestibility and in percent composition of Si.Two millimeter leaf sections of Tifton-7 8 (Tift-7 8) and Coastal (CBG) were incubated for 72 hr in 2.5% (w/v) cellulase in 0.05 M sodium acetate buffer, pH 5.0. For controls, sections were incubated in the sodium acetate buffer or were not treated.

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