Abstract
Root, hypocotyl and cotyledon explants of Sesbania bispinosa, Sesbania cannabina, Sesbania formosa, and Sesbania sesban were cultured on Murashige and Skoog medium with benzyladenine (BA; 2.22, 4.44, 8.88 μM) in combination with 2,4-dichlorophenoxyacetic acid (2,4-d; 2.26, 4.52, 9.05 μM), indolebutyric acid (IBA; 0.25, 0.49, 4.92 μM) or naphthaleneacetic acid (NAA; 2.69, 5.37, 10.74 μM). Although all explant types developed some callus, callus occurred earliest and continued to grow fastest with hypocotyls. Media including 2.4-d or NAA gave the fastest growing callus. Callus was subcultured up to 10 times at 20-day intervals and retained a rapid growth rate. Shoots regenerated readily from both hypocotyls or cotyledons but not from roots. Shoot organogenesis was most frequent with IBA (0.25–4.92 μM) in combination with BA (4.44–8.88 μM) and did not occur with 2,4-d. With each species at least one medium induced shoot differentiation from more than 50 percent of the callus pieces. With one exception, media containing IBA that induced shoot organogenesis on explants also did so in callus, but media containing NAA, even when effective with explants, did not cause differentiation of callus. Shoots that differentiated were excised and cultured on MS medium without growth regulators or with IBA (2.46, 4.92, 9.84 μM). Roots developed after 3–8 days on an appropriate rooting medium, often without IBA. Rooted plantlets were transplanted to pots in a greenhouse and developed into normal plants. Suitable media and protocols for initiating and subculturing callus and regenerating whole plants in vitro from callus and explants have thus been established for four species of Sesbania.
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Yan-Xiu, Z., Dun-Yi, Y. & Harris, P.J.C. Plant regeneration from callus and explants of Sesbania spp.. Plant Cell Tiss Organ Cult 34, 253–260 (1993). https://doi.org/10.1007/BF00029714
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DOI: https://doi.org/10.1007/BF00029714