scholarly journals Direct shoot organogenesis from leaf explants of Populus deltoides and changes in selected enzymatic activities

2020 ◽  
Vol 26 (2) ◽  
pp. 399-407
Author(s):  
Saloni Sharma ◽  
M. S. Reddy ◽  
Anil Kumar
Keyword(s):  
Populus Deltoides ◽  
Shoot Organogenesis ◽  
Leaf Explants ◽  
Enzymatic Activities ◽  
Direct Shoot Organogenesis ◽  
Direct Shoot

scholarly journals High Efficiency Direct Shoot Organogenesis from Leaf Segments ofAerva lanata(L.) Juss. Ex Schult by Using Thidiazuron

2014 ◽  
Vol 2014 ◽  
pp. 1-6 ◽  
Author(s):  
K. Varutharaju ◽  
C. Soundar Raju ◽  
C. Thilip ◽  
A. Aslam ◽  
A. Shajahan
Keyword(s):  
Shoot Organogenesis ◽  
Adventitious Shoots ◽  
Leaf Explants ◽  
Naphthaleneacetic Acid ◽  
Scale Production ◽  
Ms Medium ◽  
Leaf Segments ◽  
Direct Shoot Organogenesis ◽  
Direct Shoot

An efficient protocol for direct shoot organogenesis has been developed for the medicinal plantAerva lanata(L.) Juss. ex Schult. Regeneration was achieved from leaf segments of 20 days oldin vitroplantlets raised on Murashige and Skoog (MS) medium containing 0.25–2.0 mg L−1thiadiazuron (TDZ), 3% sucrose, and 0.8% agar. After 21 days of culture incubation, maximum number of shoot organogenesis (23.6 ± 0.16) was obtained on medium containing 1.0 mg L−1TDZ. The shoots were able to producein vitroflowers on medium containing 1.0 mg L−1TDZ in combination with 0.25–0.5 mg L−1  α-naphthaleneacetic acid (NAA). Histological observation showed that the epidermal cells of the leaf explants exhibited continuous cell division led to formation of numerous dome shaped meristematic protrusions and subsequently developed into adventitious shoots. Upon transfer of shootlets to half strength MS medium containing 1.0 mg L−1indole-3-butyric acid (IBA), around 86% of the regenerated shoots formed roots and plantlets. Rooted plants were hardened and successfully established in the soil at the survival rate of 92%. The regeneration protocol developed in this study provides an important method of micropropagation of this plant. Furthermore, this protocol may be used for a large scale production of its medicinally active compounds and genetic transformations for further improvement.

scholarly journals (405) Regeneration of Venus Fly Trap (Dionaea muscipula Ellis) from Leaf Culture

HortScience ◽  
2005 ◽  
Vol 40 (4) ◽  
pp. 1062F-1063
Author(s):  
Khalid M. Ahmad ◽  
Syed M. A. Zobayed ◽  
Praveen K. Saxena ◽  
David M. Hunter
Keyword(s):  
Somatic Embryogenesis ◽  
Shoot Organogenesis ◽  
In Vitro Regeneration ◽  
Leaf Disc ◽  
Leaf Explants ◽  
Carnivorous Plant ◽  
In Vitro Techniques ◽  
Direct Shoot Organogenesis ◽  
Direct Shoot

Dionaeamuscipula Ellis commonly known as Venus fly trap is an important carnivorous plant with medicinal importance. It contains certain secondary metabolites like naphthoquinones and is used in anti-aid and anti-cancer drugs and other medicines like Cornivora. Increasing interest and use as an ornamental and medicinal plant, and dietary supplement have put it in an endangered state. Development of in vitro techniques for the preservation of germplasm that is on the brink of extinction is highly demanded. A regeneration protocol for the multiplication and micropropagation of Dionaeamuscipla Ellis was established. In vitro regeneration potential of leaf explants in different concentrations and combinations of plant growth substances was investigated in this study. Seeds were grown and leaf disc explants were excised and cultured under aseptic conditions on nutritional medium containing half strength Murashige and Skoog (MS) mix with combinations of 1.0–20.0 μm BA, 2.5.0 μm IBA, 1.0–10.0 μm 2iP and 0.1–0.5μm TDZ. The cultures were kept in growth cabinet with cool white light (40–60 μmol·m-2·s-1) under 16-h photoperiod. Regeneration was recorded after 60 days with the intervals of 15 days based on the degree of shoot organogenesis and somatic embryogenesis. 1/2 MS + 0.1 TDZ appeared to be efficient for somatic embryogenesis and simple MS for direct shoot organogenesis. 1/2 MS combined with 2iP appeared to be efficient for regeneration either by direct shoot organogenesis or by somatic embryogenesis. Plants were rooted well in Cape Cundew medium. These investigations will aid in the development of a model system for clonal mass propagation and in vitro regeneration of Dionaeamuscipla Ellis.

scholarly journals DEVELOPMENTAL ANATOMY OF DIRECT SHOOT ORGANOGENESIS IN LEAVES OF VITIS VINIFERA

HortScience ◽  
1990 ◽  
Vol 25 (11) ◽  
pp. 1353E-1354
Author(s):  
Sheila M. Colby ◽  
Adrian M. Juncosa ◽  
James A. Stamp ◽  
Carole P. Meredith
Keyword(s):  
Vitis Vinifera ◽  
Shoot Organogenesis ◽  
Adventitious Shoots ◽  
Leaf Explants ◽  
Wound Response ◽  
Vascular Bundles ◽  
Developmental Anatomy ◽  
Direct Shoot Organogenesis ◽  
Direct Shoot

The developmental anatomy of direct shoot organogenesis from in vitro leaves of Vitis vinifera L. cv. French Colombard was studied by light microscopy. Regenerating petiole stubs of leaf explants were fixed at intervals and were sectioned longitudinally to determine the developmental sequence of direct shoot organogenesis. After 6 days, three distinct regions of meristematic activity were apparent within expanding petiole stub: the wound-response, organogenic, and vascularization regions. In the organogenic region, divisions of vacuolate outer cortical cells formed nodular bumps that sometimes became adventitious leaves. Promeristems, which had the potential to become adventitious shoot meristems, were also initiated asynchronously in the organogenic region. Promeristem initiation occurred by two or several synchronous cell divisions occurring in the epidermal and subepidermal cell layers. Adventitious shoots and leaves developed new vascular bundles that connected to the pre-existing vascular bundles of the explant.

scholarly journals A Laboratory Exercise to Demonstrate Direct and Indirect Shoot Organogenesis from Leaves of Torenia fournieri

1994 ◽  
Vol 4 (3) ◽  
pp. 320-322 ◽  
Author(s):  
Mark P. Bridgen ◽  
Masood Z. Hadi ◽  
Madeleine Spencer-Barreto
Keyword(s):  
Shoot Organogenesis ◽  
Callus Formation ◽  
Adventitious Shoots ◽  
Leaf Explants ◽  
Basal Medium ◽  
Ms Medium ◽  
Torenia Fournieri ◽  
Laboratory Exercise ◽  
Direct Shoot Organogenesis ◽  
Direct Shoot

A laboratory exercise on direct and indirect organogenesis from leaf explants is presented for students of plant tissue culture or plant propagation. Torenia fournieri, the wishbone flower, is used for this laboratory exercise because the in vitro production of adventitious shoots from Torenia is easy to control, seeds are easy to obtain, and plants are easy to grow. Direct shoot organogenesis results from leaf explants without an intervening callus phase, and indirect shoot organogenesis is possible after 4 to 6 weeks of callus production from leaf explants. The basal medium for all forms of organogenesis contains Murashige and Skoog (MS) salts and vitamins, 30 g sucrose/liter, and 7 g agar/liter at pH 5.7. To obtain direct shoot organogenesis, leaf explants should be placed on the MS basal medium with 1.1 μM (0.25 mg·liter-1) 6-benzylaminopurine (BAP) and 0.25 μM (0.05 mg·liter-1) indole-3-butyric acid (IBA). If leaf explants are placed on MS medium with 2.3 μM (0.5 mg·liter-1) 2,4-dichlorophenoxyacetic acid (2,4-D), callus formation will occur. Callus can be subcultured onto a MS medium with 8.88 μM BAP (2.0 mg·liter-1) plus 2.5 μM IBA (0.5 mg·liter-1) for indirect shoot organogenesis to occur.

Direct shoot organogenesis from leaf explants of Embelia ribes Burm. f.: a vulnerable medicinal plant

2006 ◽  
Vol 11 (1) ◽  
pp. 57-60 ◽  
Author(s):  
A.V. Raghu ◽  
S.P. Geetha ◽  
Gerald Martin ◽  
Indira Balachandran ◽  
P.N. Ravindran
Keyword(s):  
Medicinal Plant ◽  
Shoot Organogenesis ◽  
Leaf Explants ◽  
Embelia Ribes ◽  
Direct Shoot Organogenesis ◽  
Direct Shoot
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