共查询到20条相似文献,搜索用时 31 毫秒
1.
Summary Cotyledonary node and leaf nodal explants excised from 14-d-old in vitro-grown seedlings of Albizia odoratissima were cultured on a Murashige and Skoog (MS) medium with different concentrations of 6-benzylaminopurine (BAP), N
6-(2-isopentenyl) adenine (2-iP) and kinetin, used either solely or in combinations. The highest frequency for shoot regeneration
(82.5%), the maximum number of shoots per explant (6.9), and the maximum shoot length (2.55 cm) were obtained from cotyledonary
node explants cultured on a MS medium containing 10 μM BAP and 10 μM 2-iP with 30 gl−1 sucrose. Successful rooting was achieved by placing the microshoots on MS medium with 25 μM indole-3-butyric acid (IBA) for 24h first, then transferring to the same medium without IBA. Of the various substrates tested,
vermiculite was best for plant acclimatization, in which 75% of plants survived. 相似文献
2.
S. Pandey M. Singh U. Jaiswal V. S. Jaiswal 《In vitro cellular & developmental biology. Plant》2006,42(5):389-393
Summary This study describes a protocol for the regeneration of complete plantlets of Terminalia arjuna from nodal explants of mature trees. Shoot multiplication from nodal explants was achieved by culturing on Murashige and
Skoog (MS) medium containing different concentrations of 6-benzyladenine (BA), thidiazuron or kinetin, or BA in combination
with α-naphthaleneacetic acid (NAA). The best shoot multiplication response was obtained from nodal explants grown
on modified MS (half-strength major salts and Fe-EDTA) medium containing 4.44 μM BA and 0.53 μM NAA. Seasonal variations significantly affected the proliferation potential of nodal explants and best proliferation was
observed from explants collected during April to May. Microshoots were rooted on half-strength MS medium with 4.92 μM IBA. The rooted shoots were acclimatized successfully. 相似文献
3.
Summary A complete protocol for micropropagation of 4-yr-old plants of the bambooDendrocalamus longispathus is described. Culture initiation was strongly influenced by the nature of the explant and the season. In vitro multiplication
was achieved through forced axillary branching. Single node segments from the young lateral branches produced multiple shoots
on agar-solidified Murashige and Skoog (MS) medium supplemented with 12µM benzylaminopurine (BAP) and 3µM kinetin. The shoots have been multiplied for 15 passages in liquid and thereafter for over 5 passages on semisolid MS+15µM BAP+1µM indolebutyric acid (IBA)+10% coconut water at a rate of 3.2- and 2.8-fold, every 4 wk, respectively. The nature of the propagule
was a critical factor for shoot multiplication and rooting. Seventy-three percent of the shoots rooted on a modified MS medium
(major salts reduced to half strength) containing 1µM indoleacetic acid, 1µM IBA, and 68µM coumarin. Through a simple in vitro hardening step, more than 85% of the tissue culture-raised plants were successfully transferred
to soil. 相似文献
4.
Esmaeil Ebrahimie A. A. Habashy M. Mohammadie-Dehcheshmeh M. R. Ghannadha B. Ghareyazie B. Yazdi-Amadi 《In vitro cellular & developmental biology. Plant》2006,42(5):455-460
Summary A rapid and one-step protocol for direct regeneration of shoots from cumin embryo explants has been developed. Embryo explants
with shoot meristems were cultured on shoot regeneration medium for 15–22 d. After embryo culture, shoots were regenerated
from the area adjacent to the region between the cotyledons and embryo axis within 2 wk, without any intermediate callus phase.
Shoot proliferation and elongation were achieved on shoot regeneration medium without subculture. Among the different combinations
of 6-benzylaminopurine, α-naphthaleneacetic acid (NAA), and indole-3-acetic acid (IAA) tested, 0.8 mgl−1 (4.3 μM) NAA in combination with 0.3 mgl−1 (1.71 μM) IAA in the B5 medium resulted in the most efficient direct shoot regeneration. No significant difference was detected for
the number of regenerated explants when different heterogeneous endemic varieties were compared. This plant regeneration procedure
was applicable to different cumin genotypes and regenerated plants were phenotypically normal. 相似文献
5.
Multiple shoots were obtained from nodal explants of 30-year-old trees of Dalbergia sissoo Roxb. on a defined medium, MS (Murashige & Skoog medium) supplemented with auxin-cytokinin combinations. IAA (Indole accetic acid) alone promoted 15% rooted shoot buds. A combination of IAA+Kn (Kinetin) gave 100% rooted shoot buds. A combination of NAA (napthaleneacetic acid) + Kn and NAA+BAP (6-benzylaminopurine) also gave high percentages of rooted shoot buds. Ascorbic acid in the medium prevented the death of callus and plantlets, which followed darkening of the medium. 相似文献
6.
S. A. Webster S. A. Mitchell W. A. Reid M. H. Ahmad 《In vitro cellular & developmental biology. Plant》2006,42(5):467-472
Summary This study investigated factors affecting the production of somatic embryos in Blighia sapida (ackee). Explants obtained from fully expanded leaves or cotyledons of immature zygotic embryos excised from brown (BSCZE)
or green seeds (GSCZE) were cultured on Murashige and Skoog medium supplemented with 9, 18 and 36μM 2,4-dichlorophenoxyacetic acid (2,4-D) and 4.4 or 22.1 μM benzylaminopurine (BAP) or 0.2–19.9 μM thidiazuron (TDZ). Leaf explants grown on media supplemented with the different combinations of 2,4-D and BAP formed callus,
but they were non-embryogenic, while explants were not responsive on TDZ-supplemented media. GSCZE explants grown in the presence
of 2,4-D/BAP combinations of 9/4.4, 18/4.4 or 36/4.4 μM formed non-embryogenic callus profusely, but explants gave rise to organized globular protuberances (GPs) and non-embryogenic
callus on media containing TDZ, with the best concentration at 0.4 μM. BSCZE explants grown on TDZ-supplemented media also formed callus, but no GPs were detected. When GPs were cultured on media
containing TDZ and abscisic acid they (ABA), gave rise to the highest number of somatic embryos. The medium was also beneficial
for the development of somatic embryos from the globular to cotyledonary stage. 相似文献
7.
R. K. Sinha K. Majumdar S. Sinha 《In vitro cellular & developmental biology. Plant》2000,36(5):370-373
Summary Petiolar and distal cotyledonary segments (PCS and DCS) of Albizia chinensis were cultured on Murashige and Skoog's (MS; 1962) medium and induced to form adventitious shoot buds in the presence of either
cytokinins 6-benzylamino purine (BAP), kinetin (KN) or thidiazuron (TDZ). Superiority of BAP in inducing shoot bud and differentiation
was observed. PCS was more morphogenic to shoot bud differentiation than DCS. TDZ was highly effective in inducing shoot buds,
but arrested shoot growth, while KN produced more callus during differentiation of shoots. Rapid and high rate of shoot multiplication
per explant was achieved through subculture in MS medium containing BAP (1.0 mg l−1) and indole-3-acetic acid (IAA) (0.5 mg l−1). BAP at low concentration was required to enhance shoot multiplication and elongation. Successful rooting of regenerated
shoots was carried out in a two-step culture procedure in MS media with indole-3-butyric acid (IBA) (2.0 mg l−1) and subsequent subculture in IBA-free medium. 相似文献
8.
I. K. Nishitha K. P. Martix Ligimol A. Shahanaz Beegum P. V. Madhusoodanan 《In vitro cellular & developmental biology. Plant》2006,42(5):385-388
Summary This study describes a protocol for in vitro propagation of Chonemorpha grandiflora (Roth) S.M. & M.R. Almeida (Apocynaceae) through axillary bud proliferation and rooting. For shoot induction, the combination of 13.3 μM
N
6-benzyladenine (BA) and 2.46 μM indole-3-butyric acid (IBA) in Murashige and Skoog (MS) medium was better than other growth regulators. Liquid medium was
superior over solid medium for root formation and growth. IBA was more effective than other auxins for root induction. Addition
of silver nitrate in the presence of IBA significantly increased the number, length, and branching of roots. Shoot tips encapsulated
in medium containing 0.49 μM IBA and 11.7 μM silver nitrate exhibited 95% conversion to plantlets. This protocol enables the production of 250 plantlets from a single
nodal explant within 7 mo. Plantlets showed 90% survival after acclimatization in soil and were morphologically similar to
the source plant under field conditions. 相似文献
9.
Rakhi Chaturvedi S. P. Bhatnagar 《In vitro cellular & developmental biology. Plant》2001,37(2):255-258
Summary A protocol for in vitro shoot regeneration from cotyledon explants of Citrullus lanatus (Thunb.) Matsum. & Nakai cv. Sugar Baby is described. The cotyledons excised from 7-d-old aseptic seedlings showed the highest
percentage of shoots on Murashige and Skoog (MS) + N6-benzyladenine (BA; 3.0 μM) + N6-[2-isopentenyl] adenine (2iP; 3.0 μM) and MS + BA (3.0 μM) + indole-3-acetic acid (IAA; 3.0 μM). Whereas the latter medium induced shoot regeneration after the callusing of the explant, the former stimulated direct shoot
formation. The regenerated shoots were rooted and the resulting plants were established in earthen pots with 55% success. 相似文献
10.
A protocol is presented for micropropagation of an economically important timber-yielding forest tree, Dalbergia sissoo Roxb. (Sissoo). Multiple shoots were induced from cotyledonary nodes derived from 1-week-old axenic seedlings on Murashige
and Skoog's medium containing either N
6-benzyladenine (BA), kinetin (Kn), isopentenyladenine (2iP) or thidiazuron (TDZ), with BA being the most effective growth
regulator. High-frequency shoot proliferation (99%) and maximum number of shoots per explant (7.9 shoots) were recorded with
BA at an optimum level of 8.9 μM. Concentrations of all cytokinins tested above the optimum level markedly reduced the frequency of shoot proliferation. A
proliferating shoot culture was established by repeatedly subculturing the original cotyledonary node on shoot multiplication
medium after each harvest of the newly formed shoots. Primary shoots were multiplied as nodal explants, and from each stem
node 2 or 3 shoots developed. Thus, 60–70 shoots were obtained in 3 months from a single cotyledonary node. About 91% of the
shoots developed roots following transfer to half-strength MS medium containing a combination of 5.7 μM indole-3-acetic acid, 4.9 μM indole-3-butyric acid and 5.3 μM indole-3-propionic acid. Eighty percent of the plantlets were successfully acclimatized and established in soil.
Received: 1 October 1997 / Revision received: 31 March 1998 / Accepted: 7 April 1998 相似文献
11.
Summary Multiple shoots were grown from seedling explants of Alnus cremastogyne Burk by a two-stage culture procedure: initiation on WP medium supplemented with 2–8 M benzylammopurine(BAP) for 6 weeks, thereafter 3 weeks of subculture(shoot multiplication) on the same medium with 1 M BAP. A 5–9 fold multiplication rate was achieved. Type and concentration of sugar used in the multiplication medium were shown to be critical factors for both multiple shoot induction and bud elongation, the optima being 87.5mM glucose and 87.5mM sucrose respectively. After transfer to half-strength WP media either containing indolebutyric acid (IBA) or lacking plant growth regulator, almost all the shoots rooted. However, high rhizogenesis could be achieved only with shoots cultured in rooting medium containing 87.5mM sucrose or 175mM glucose, and shoots from multiplication media containing 87.5mM sucrose. Survival of the plantlets following transfer to vermiculite was 100%.Abbreviations BAP
6-benzylaminopurine
- 2iP
N6-(2-isopentenyl)adenine
- kinetin
6-furfurylaminopurine
- zeatin
trans-6-(4-hydroxy-3-methylbut-2-enyl)aminopurine
- IBA
indol-3-butyric acid
- WPM
Woody plant medium (Lloyd and McCown, 1981) 相似文献
12.
R. Rodríguez M. Rey L. Cuozzo G. Ancora 《In vitro cellular & developmental biology. Plant》1990,26(5):531-536
Summary A twenty fold multiplication per twenty days of caper was achieved by culturing nodal shoot segments in the presence of BAP
(4 μM) plus IAA (0.3 μM) and GA3 (0.3 μM). The use of a modified MS medium facilitated this response. Plantlet regeneration was induced on single shoots taken from
proliferating clusters subcultured for 20 days on a reduced BAP (2 μM) without auxin and gibberellin Higher rooting responses (70%) were obtained after a 20-day incubation period in darkness
on solid half-strength MS1 medium plus IAA (30 μM), followed by a subsequent 20 day culture period on half-strength MSI basal medium. Proliferation was mainly due to axillary
shoot-bud development as revealed by histological studies. The extensive meristematic activities observed indicated the enormous
morphological potential of this species. 相似文献
13.
Callus cultures of Prosopis tamarugo Phil (Leguminosae, Sub family-Mimosoideae) were established from hypocotyls and cotyledons on MS medium supplemented with NAA (2.0 mg l-1) and BAP (0.2 mg l-1). Regeneration through various juvenile explants was obtained on hormone-free and high cytokinin containing Murashige and Skoog's medium. Multiple shoot buds formation was observed from the embryonic axis on MS medium incorporated with BAP (5.0 mg l-1)). Elongation of shoot buds was observed on subsequent transfer to MS medium with BAP (1.0–2.5 mg l-1) or without BAP. Explants containing apical meristem showed higher number of shoot formation at an early period. De novo shoot buds formation through callus morphogenesis was observed at the base of differentiated shoots on high cytokinin containing medium. All the manipulations of salt strength of MS, nitrogen, carbon, ascorbic acid and polyamines failed to induce organogenesis in isolated callus. In vitro produced shoots were rooted on MS medium supplemented with IBA or NAA singly or in combination.Abbreviations HC
high cytokinin (BAP 5.0 mg l-1)
- BAP
6-benzyl amino purine
- IBA
indole-3-butyric acid
- HF
hormone free
- NAA
I-naphthalene acetic acid
- MS
Murashige & Skoog 相似文献
14.
Summary Segments of male inflorescences of medicinal yam (Dioscorea floribunda) cultured on Murashige and Skoog (MS) medium supplemented with 13.94 μM kinetin (Kn) resulted in the conversion of floral buds into vegetative buds and these later developed into plantlets. Growth
and multiplication of shoots could be obtained by culturing individual shoots in MS modified basal medium, replacing the MS
standard three vitamins with 10.0 mgl−1 thiamine in addition to 13.94 μM Kn. Root induction was also obtained simultaneously from the base of the shoots in the same medium. Such plantlets have been
successfully transferred to potted soil, where they grew normally. Plantlets were also made to develop tubers on MS medium
with 18.91 μM abscisic acid (ABA) and also with 2.68 μM α-naphthaleneacetic acid (NAA) and 40–50 gl−1 sucrose. 相似文献
15.
In vitro regeneration of plantlets and multiplication of Sesbania bispinosa (Jacq.) W.F. Wight plants from cultured callus tissue were demonstrated. Callus was established from both cotyledons and mature leaflets on Murashige and Skoog (MS) basal medium supplemented with BAP (0.5 mg/l) and 2,4-D (2 mg/l). Callus mediated shoot bud differentiation was studied under defined nutritional, hormonal and cultural conditions. Various concentrations of BAP or kinetin (Kn) with coconut milk (CM) in MS media induced different levels of shoot bud differentiation as well as multiplication. Multiple shoot bud differentiation occurred in most of the primary calli. The best medium for shoot bud differentiation from cotyledon derived callus, contained BAP (2 mg/l) and 15% CM (V/V). More efficient shoot bud organogenesis was recorded with BAP than Kn. Supplementation with CM in MS media accelerated shoot bud organogenesis in differentiating callus tissue. Rooting of differentiated shoots was achieved by a three step culture procedure involving (a) MS solid medium containing IBA (2 mg/l), (b) growth regulator free half strength MS medium with 1% charcoal, and (c) half strength MS liquid medium free of vitamins, growth regulators and charcoal.Abbreviations IAA
indoleacetic acid
- IBA
indole-3-butyric acid
- NAA
naphthaleneacetic acid
- 2,4-D
2,4-dichlorophenoxyacetic acid
- BAP
6-benzylaminopurine
- Kn
kinetin
- CM
coconut milk
- MS
Murashige and Skoog's medium
- SBI
shoot bud inducing medium 相似文献
16.
Conditions for plant regeneration from excised cotyledons of Vigna radiata were studied. Complete plant developed from the uncallused proximal ends of cotyledons on Murashige & Skoog's (MS), Gamborg's (B5) and C (MS salts + B5 vitamins) basal media. The basal medium C was found to be best for plant regeneration. Regeneration frequency, however, varied with genotype, size, orientation and age of explant and the different plant growth regulators combination in the medium. Addition of cytokinins induced callusing at the proximal ends of cotyledons followed by multiple shoot formation. Out of 6-benzyl aminopurine (BAP), kinetin (KIN), N (–2 isopentyl) adenine (2iP) and adenine sulphate (AS), only BAP and KIN were found to be more effective in enhancing the frequency of shoot regeneration. BAP at 1×10-1M induced maximum (60%) shoot regeneration whereas maximum number of shoots (8 to 9 shoots) per explant was observed with 5×10-6M BAP. Cotyledons excised from two-day old seedlings were most regenerative. The regenerative response of cotyledons decreased when sliced into two equal parts either longitudinally or transversely. Callusing and organogenic differentiation occured only if the petiolar end of cotyledons was in contact with medium. None of the tested treatments were effective in inducing shoot bud differentiation from subcultured callus. Well developed shoots rooted when incubated on half strength MS, MS and MS basal medium supplemented with IAA (5×10-6M). The rooted plants were transferred to pots and later established in the field with 60% success.Abbreviations AS
adenine sulphate
- BAP
6-benzylaminopurine
- B5
medium after Gamborg et al. [6],
- C
Medium with MS salts + B5 vitamins
- 2iP
N (–2 isopentyl) adenine
- IAA
indole-3-acetic acid
- KIN
Kinetin
- MS
medium after Murashige & Skoog [21]
- NAA
1-napthaleneacetic acid 相似文献
17.
Shashi Kant Singh Manoj K. Rai Pooja Asthana L. Sahoo 《Acta Physiologiae Plantarum》2009,31(4):693-698
An efficient and improved in vitro propagation system for Spilanthes acmella L. using transverse thin cell layer (tTCL) culture system was established. The frequency of shoot regeneration from tTCL
nodal segments was affected by concentrations of plant growth regulators and orientation of the explant. MS (Murashige and
Skoog in Physiol Plant 15:473–497, 1962) medium with 5.0 mg dm−3 BAP was optimal for shoot regeneration. Upon this medium, the explant inoculated in the upright orientation exhibited a high
frequency of shoot regeneration (about 97%), and the highest number of shoots (31.5) per explant. The intact node (1.0–1.5 cm)
cultured on the same medium had significantly lower shoot multiplication ability with only 4.5 shoots per responsive explant.
As compared to BAP alone, the combination of BAP and Kin or NAA did not have positive effects on shoot multiplication from
tTCL nodal segments. Rooting of shoots was achieved on growth regulator free full-strength MS medium. Plantlets were transplanted
into soil with 90–100% survival rate. 相似文献
18.
Summary An in vitro method for cloning and mass multiplication of Maytenus emarginata, a highly drought resistant tree of the Indian Desert, has been developed. Shoot segments harvested from a plus tree (30-year-old) were cultured to produce multiple shoots (10–15 shoots/explant) on MS medium containing 0.1 mgl–1 IAA and 2.5mgl–1 BAP. In vitro produced shoots were cut into segments and cultured on shoot proliferation medium but with only 1.0 mgl–1 of BAP to further multiply the shoots. Isolated individual shoots were cultured on a filter paper bridge in half strength MS liquid medium containing 25 mgl–1 of IBA for 72 h in the dark at 28±20 C for induction of root(s). About 70–80 percent of shoots rooted. The treelets developed were hardened and transferred to pots. Around 20,000 plants can be obtained from a single explant within a period of 6 months. The protocol is highly reproducible and efficient.Abbreviations IAA
indole-3-acetic acid
- IBA
indole-3-butyric acid
- NAA
-naphthalene acetic acid
- NOA
-naphthoxy acetic acid
- BAP
6-benzylaminopurine
- Kn
6-furfurylaminopurine
- B5
Gamborg et al. (1968) medium
- MS
Murashige and Skoog (1962) medium 相似文献
19.
Stackhousia tryonii Bailey, a rare species whichhyperaccumulates nickel and with a potential to be exploited inphytoremediation/phytomining, is difficult to propagate via seeds. This studyinvestigated the development of a micropropagation protocol for the productionof large stocks of S. tryonii. Disinfested shoot tips andnodal buds were precultured on Gamborg's (B5) basal medium toobtain aseptic shoots for the optimisation of the protocol. 6-Benzyl aminopurine(BAP) at 1.0 mg l–1 produced the highest number ofshoots per explant in B5 medium. Comparison betweenB5 and MS media showed similar responses, but with marked influenceof BAP concentration on shoot numbers. Transfer of shoots from MS(multiplication) medium to MS medium supplemented with indole-3-acetic acid(IAA) and indole-3-butyric acid (IBA), individually or in combination, indicatedthat a combination of IAA and IBA (0.75 mg l–1each) is required to produce roots on young shoots (75%) compared to IBA(15–45%) or IAA (0–10%) alone. This study demonstrated that by usingthis protocol, a high multiplication rate (up to 18 shoots per explant) could be produced within 4 weeks, andthey can be readily hardened (98% survival) in a glasshouse by transplantingthem into a potting mixture of sand and perlite (4:1). 相似文献
20.
Summary An efficient and rapid micropropagation system was developed for a food and medicinally important endangered shrub, Decalepis hamiltonii (‘swallow root’), through shoot multiplication. The influence of 2.5–7.5 μM isopentenyladenine (2iP), 4.4–17.7 μM 6-benzyladenine, 2.3–4.7 μM kinetin, 2.8–6.8 μM thidiazuron, and 2.3–11.4 μM zeatin alone and in combination with 0.3–0.9 μM indole-3-acetic acid (IAA) on in vitro multiple shoot production was studied. The maximum number of multiple shoots (6.5±0.4) was induced from shoot tips cultured
on agar-based Murashige and Skoog (MS) medium containing 4.9 μM 2iP. But, both zeatin (9.1 μM) and kinetin (4.7 μM) in combination with IAA (0.6 μM) were able to produce a maximum of 5.0±0.4 and 5.1±0.4 multiple shoots, respectively. Further elongation of shoots and adventitious
shoot formation was obtained on medium containing 2.5 μM 2iP and 0.3 μM gibberellic acid. Elongated shoots were separated and rooted on MS medium supplemented with 9.8μM indole-3-butyric acid (IBA) and various phenolic compounds within 5–6 wk. Phloroglucinol and salicylic acid interaction with
IBA stimulated in vitro rooting of shoots. Successful field transfer was achieved in rooted plantlets. 相似文献