2. Institutional Publications
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Item Plant biotechnology research at the kerala agriculture university(Kerala Agricultural University, Vellanikkara, 2005) Rajmohan, KItem Influence of explant source on the in vitro propagation of jack (Artocarpus heterophyllus Lam.)(Kerala Agricultural University, 1985) Rajmohan, K; Mohanakumaran, NPhysiological ago of the explants exhibited significant influence on the in vitro propagation of jack. Shoot apices from the seedlings registered a multiplication rateof17.4x, with 100 percent rooting and 6.0 roots formed in 20.75 days. Explarits from fresh stem-sprouts of five, ten and thirty-year old trees recorded shoot multiplication rates of 4.50x, 2.80x and 2.09x, respectively in five weeks. The corresponding rooting percentages were 70 (with 5.43 roots formed in 13.43 days), 40 (with 2.59 roots formed in 24 days) and 15 (with 1.0 root formed in 46.7 days) after two to three subcultures. Explants from six-month old jack grafts failed to produce multiple shoots; but exhibited 50 per cent rooting with 2.0 roots formed in 20.5 days.Item Effect of plant growth substances on the in vitro propagation of jack (Artocarpus Heterophyllus Lam.)(Kerala Agricultural University, 1988) Rajmohan, K; Mohanakumaran, NExplants from shoot apices of fresh stem sprouts of five-year old jack (Artocarpusheterophyllus Lam.) trees registered a multiplication rate of 4.5 x. when cultured for five weeks on MS proliferation medium containing BA (5 mg/l) and NAA (0.2 mg/l). The normal strength of inorganic salts and organic growth factors of the MS medium, with 30—40 g/l of sucrose or 20—30 g/l of glucose was found to support the multiplication and growth of the cultures. GAa did not influence the shoot proliferation or growth. Adenine sulphate at 20 mg/l was found to increase the multiplication rate by 27.3 per cent, withoutItem Somatic organogenesis/embryogenesis from in vitro cultures of mussaenda (Mussaenda Erythrophylla Schum & Thonn.)(Kerala Agricultural University, 1988) Rajmohan, K; Mohanakumaran, NOvary wall was identified as the best source of explantfor callus production, registering a callus index value of 400, when cultured on MS medium supplemented with NAA 2 mg/l+ kinetin 1 mg/I or NAA 4 mg/l + kinetin 2 mg/l. Shoot regeneration from the callus occurred at a frequency of 33.3 per cent on MS medium supplemented with BA 2 mg/l or BA/kinetin combinations 0.5 + 0.5 mg/l or 0.5 + 0.3 mg/1. Root regeneration was observed at a frequency of 66.7 per cent, with 13.33 roots per culture on MS medium containing kinetin NAA combination 2+8 mg/l after 60 days of culture. Globular structures resembling somatic embryoids having simultaneous root and shoot development were observed when callus from tha induction medium (MS •+• 2,4-D 2 mg/l -f kinetin 1 mg/l) was transferred to MS medium containing BA/kinetin combinations 0.5 4- 0.5 mg/l or 1 + 0.5 mg/l, after 70 to 73 days of culture. About 4.5 shoots with tufts of miniature roots were formed per culture in the best treatment.Item In vitro rooting of jack shoot cultures(Kerala Agricultural University, 1983) Rajmohan, K; Mohanakumaran, NItem In vitro germination of hybrid seeds of banana(Kerala Agricultural University, 1992) Lekshmy, M L; Valsalakumari, P K; Rajmohan, K