Possible involvement of an acidic chitinase during direct somatic embryogenesis in Coffea arabica L

2000 ◽  
Vol 28 (5) ◽  
pp. A405-A405
Author(s):  
R. Rojas-Herrera ◽  
M. Monforte-González ◽  
M. Méndez-Zeel ◽  
V. M. Loyola-Vargas
Keyword(s):  
Somatic Embryogenesis ◽  
Coffea Arabica ◽  
Direct Somatic Embryogenesis ◽  
Coffea Arabica L

scholarly journals The effect of auxin 2,4-D and cytokinin 2-ip on direct somatic embryogenesis formation of Coffea arabica L. leaf explant

2011 ◽  
Vol 27 (2) ◽  
Author(s):  
Rina Arimarsetiowati
Keyword(s):  
Tissue Culture ◽  
Somatic Embryogenesis ◽  
Coffea Arabica ◽  
Callus Formation ◽  
Culture Technique ◽  
Plant Production ◽  
Direct Somatic Embryogenesis ◽  
Arabica Coffee ◽  
Randomized Design ◽  
Coffea Arabica L

One of the propagation technique for coffee plant production is tissue culture. Tissue culture technique for Coffea arabica L. faces some problems, mainly in the planlet formation regenerated from explants. The objective of this experiment was to examine the effect 2,4-D and 2-ip combination on the formation of direct somatic embryogenesis of Coffea arabica L. in leaves explant. Auxin (2,4-D) and cytokinin (2-ip) concentrations of, respectively, 1; 5 µM and 5; 10; 15; 20 were used as treatments. This research was conducted using completely randomized design with 10 replications. Observation to induce somatic embryos was done by quantitatively on number of callus from explant and number of embryogenic callus. Beside that, observation by qualitative descriptive was also done on deve lopment of embryogenesis. The results showed that Arabica coffee leaves explant of AS 2K clones could be induced in all medium combination except 5µM 2,4-D and 20µM 2-ip combination. Arabica coffee leaves explant of S 795, Sigararutang and AS 1 varieties could be induced in all medium combination. The highest frequency of callus formation was found in AS 2K, Sigararutang and AS 1 varieties on medium containing 1µM 2,4-D in combination with 10µM 2-ip, whereas for the S 795 variety on medium containing 5µM 2,4-D in combination with 10µM 2-ip. The highest frequency of embriogenic callus in all Arabica coffee variety could be reached on medium containing 5µM 2,4-D in combination with 15µM 2-ip. Key words : Coffea arabica L., somatic embryogenesis, 2,4-D, 2-ip, tissue culture, leaves, callus embryogenic.

scholarly journals 2- Isopentenyladenine in the induction of direct somatic embryogenesis capacity of Coffea arabica L.

2018 ◽  
Vol 48 (11) ◽  
Author(s):  
Ivanilda dos Santos Alves ◽  
Valéria Cristina Barbosa Carmazini ◽  
Cosme Damião dos Santos ◽  
Julieta Andrea Silva de Almeida
Keyword(s):  
Somatic Embryogenesis ◽  
Salt Concentration ◽  
Somatic Embryos ◽  
Coffea Arabica ◽  
Leaf Explants ◽  
Direct Somatic Embryogenesis ◽  
Coffea Arabica L

ABSTRACT: This study evaluated the effect of different concentrations of 2-isopentenyladenine (2-iP) on the direct somatic embryogenesis capacity of the Mundo Novo cultivar of Coffea arabica. Leaf explants were cultivated with half the MS salt concentration and the addition of sucrose (20gL-1) and 2-iP (0; 2.5; 5; 7.5 and 10µM). The 2-iP doses of 7.5 and 10µM produced the greatest responses with respect to the percentage of explants with embryogenic structures and the size of the embryogenic structures. However, the greatest production of somatic embryos occurred on the explants treated with 10µM of 2-iP, followed by 7.5µM, whereas their production was absent or reduced with 0 and 5µM, respectively.

Brassinosteroid increases the cytokinin efficiency to induce direct somatic embryogenesis in leaf explants of Coffea arabica L. (Rubiaceae)

2018 ◽  
Vol 135 (1) ◽  
pp. 63-71 ◽  
Author(s):  
Rosana Mary Sartor Chone ◽  
Diego Ismael Rocha ◽  
Carolina Cassano Monte-Bello ◽  
Hildete Prisco Pinheiro ◽  
Marcelo Carnier Dornelas ◽  
...  
Keyword(s):  
Somatic Embryogenesis ◽  
Coffea Arabica ◽  
Leaf Explants ◽  
Direct Somatic Embryogenesis ◽  
Coffea Arabica L

Differential Gene Expression During Somatic Embryogenesis in Coffea arabica L., Revealed by RT-PCR Differential Display

2002 ◽  
Vol 21 (1) ◽  
pp. 043-050 ◽  
Author(s):  
R Rojas-Herrera ◽  
F Quiroz-Figueroa ◽  
M Monforte-González ◽  
L Sánchez-Teyer ◽  
V M Loyola-Vargas
Keyword(s):  
Gene Expression ◽  
Somatic Embryogenesis ◽  
Differential Gene Expression ◽  
Differential Display ◽  
Coffea Arabica ◽  
Rt Pcr ◽  
Differential Gene ◽  
Coffea Arabica L

scholarly journals Embriogenesis somatik langsung dan regenerasi planlet kopi arabika (Coffea arabica) dari berbagai eksplan Direct somatic embryogenesis and regeneration of arabica coffee plantlets (Coffea arabica) from different explants

2016 ◽  
Vol 71 (2) ◽  
Author(s):  
Fetrina OKTAVIA ◽  
. SWANTO ◽  
Asmini BUDIANI
Keyword(s):  
Somatic Embryogenesis ◽  
Growth Regulator ◽  
Somatic Embryos ◽  
Coffea Arabica ◽  
Culture Technique ◽  
Direct Somatic Embryogenesis ◽  
Root Explants ◽  
Soil Medium ◽  
Maturation Medium ◽  
Primary Somatic Embryos

SummaryTissue culture technique for arabica coffeefaces some problems, mainly in plantletsregeneration from cultured explants. Theobjectives of this experiment were to examine theeffect 2,4-D and 2-ip combinations on somaticembryogenesis and regeneration of arabicacoffee from several different explants. Basalmedium used in this experiment was MS mediumwith ½ concentration of macro and micro salts.Experiment to induce primary somatic embryos(SE) was arranged in factorial randomizedcomplete design with 10 repeats. The first factorwas the type of explants, leaf, epicotyl, hipocotyland root explants. The second factor was plantgrowth regulator i.e. combination of 1  M 2,4-Dwith 5, 10, 15, 20  M and combination of 5  M2,4-D with 5, 10, 15 and 20  M 2-ip. To multiplySE, secondary SE was induced from primary SEon medium containing combination of 0.6  MIAA and 13.3; 17.8 and 22.2  M BAP.Cotyledonary SE were germinated on mediacontaining GA 3 (0, 5, 10 and 15  M), and thenregenerated on medium free of growth regulator.Plantlets with 4-5 leaf pairs were transfered intothe soil medium for acclimatization. The resultsshow that primary SE can be induced from allexplants with the highest frequency on mediumcontaining 1  M 2,4-D and 15  M 2-ip.Induction of primary SE, in leaf explant wasmore effective than other explants. Mediumcontaining 0.6  M IAA and 22.2  M BAP gavethe highest percentage of SE multiplication i.e.52.6% with average SE number of 6.25. Plantletsregeneration can be conducted by culturing SEon maturation medium free of growth regulatorfor one month followed by germinating onmedium containing GA 3 , and then culturing onmedium free of growth regulator again. Thehighest percentage of germinated embryos wasobtained after three weeks and six weekscultured in the medium containing 5  M GA 3 , i.e49% and 90.15 respectively. From total plantletsobtained, 75% of them were normal. Sixtypercents of the young plants grew well in thegreenhouse.RingkasanTeknik kultur jaringan tanaman kopi arabikamasih menghadapi beberapa kendala terutamapada tingkat regenerasi planlet dari eksplan yangdikulturkan. Penelitian ini bertujuan untukmengetahui pengaruh kombinasi 2,4-D dan 2-ipterhadap embriogenesis somatik dan regenerasikopi arabika dari berbagai eksplan. Media dasaryang digunakan adalah medium MS ½konsentrasi garam makro dan mikro. Percobaaninduksi embrio somatik (ES) primer disusunmenurut rancangan acak lengkap faktorial dengan10 ulangan. Faktor pertama adalah jenis eksplan,erdiri atas daun, epikotil, hipokotil dan akar invitro. Faktor kedua adalah zat pengatur tumbuh,yaitu kombinasi 1 M 2,4-D dengan 5, 10, 15dan 20M 2-ip, serta kombinasi 5 M 2,4-Ddengan 5, 10, 15 dan 20 M 2-ip. Untuk mem-perbanyak jumlah ES yang didapatkan, dilakukaninduksi ES sekunder dari ES primer pada mediumyang mengandung kombinasi 0,6 M IAA dan13,3; 17,8 dan 22,2 M BAP. ES fase kotiledonkemudian dikecambahkan pada medium yangmengandung GA 3 (0, 5, 10 dan 15 M) danselanjutnya diregenerasikan pada medium tanpazat pengatur tumbuh. Planlet yang mempunyai4-5 pasang daun dipindahkan ke medium tanahuntuk aklimatisasi. Hasil yang diperolehmenunjukkan bahwa ES primer dapat diinduksipada semua eksplan yang digunakan denganfrekuensi tertinggi pada medium yang me-ngandung 1 M 2,4-D dan 15 M 2-ip. InduksiES primer pada eksplan daun lebih efektifdibandingkan eksplan lainnya. Untuk per-banyakan ES, medium yang mengandung IAA0,6 M dan BAP 22,2 M memberikanpersentase tertinggi pembentukan ES sekunderyaitu 52,6% dengan rata-rata jumlah ES 6,25.Regenerasi planlet dapat dilakukan denganmengkulturkan ES pada medium maturasi tanpazat pengatur tumbuh selama satu bulan, kemudiandikecambahkan dalam medium yang mengan-dung GA 3 , dan selanjutnya dipindah ke mediumtanpa zat pengatur tumbuh kembali.Perkecambahan ES tertinggi diperoleh padamedium dengan penambahan GA 3 5 M yaitu40,9% setelah tiga minggu dan 90,1% setelahenam minggu. Dari total planlet diperoleh 75%planlet normal. Hasil aklimatisasi menunjukkanbahwa 60% bibit mampu bertahan di rumah kaca.

PROBLEMS OF SOIL ADAPTATION IN PLANTLETS OF COFFEA ARABICA L. OBTAINED VIA SOMATIC EMBRYOGENESIS

1987 ◽  
pp. 315-321 ◽  
Author(s):  
M.L. Guimarães ◽  
M.C. Pimenta ◽  
J. Montezuma-de-Carvalho
Keyword(s):  
Somatic Embryogenesis ◽  
Coffea Arabica ◽  
Coffea Arabica L ◽  
Soil Adaptation
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