Callus induction, plant cell

Thengane SR, Kulkami DK, Shrikhande VA, Joshi SP, Sonawane KB, Krishnamurthy KV. (2003) Influence of medium composition on callus induction and camptothecin(s) accumulation in Nothapodytes foetida. Plant Cell Tissue Organ Cult 72 247-251. 

Yasuda, T., Yajima, Y., and Yamada, Y., Induction of DNA synthesis and callus formation from tuber tissue of Jerusalem artichoke by 2,4-dichlorophenoxyacetic acid, Plant Cell Physiol., 15, 321-329, 1974. Yeoman, M.M., Tissue Culture and Plant Science, Street, H.E., Ed., Blackwell s, Oxford, 1974, pp. 1-17. Zubr, J. and Pedersen, H.S., Characteristics of growth and development of different Jerusalem artichoke cultivars, in Inulin and Inulin-containing Crops, Fuchs, A., Ed., Elsevier, Amsterdam, The Netherlands, 1993, pp. 11-19. 

Recently, an interesting effect of colchicine has been observed where it induced cell division. Positive effect of colchicine on pollen callus induction and plant regeneration on in vitro culture of Triticum aestivum and Zea mays is reported [29]. A similar effect has been observed on in vitro anther and isolated microspore cultures of Brassica napus where colchicine stimulated cell division and embryogenesis [30]. 

The activation of plant cells with chitosan and its derivatives may relate to (a) the induction of chitinase and chitosanase, (b) an increase of the callus growth of cabbage leaves, and (c) a yield increase in the field cultivation of Japanese radish plants. The growth and chitinase activity of the callus increased in the presence of low molecular weight... 

In the last 40 years of research on HS biological activity, several aspects have been elucidated. The favorable morphological effects of HS on plants regarding growth enhancement have been demonstrated on several plant species under different study conditions. Besides these observations, effects on morphogenesis have also been demonstrated in terms of (a) the induction of lateral root formation and (b) root hair initiation and development in intact plants and stimulation of root and shoot development in treated cell calluses. 

In the appropriate culture medium, tissue explants give rise to callus tissue. Callus tissue is comprised of large, thin-walled parenchyma cells. It is similar to the undifferentiated tissue produced by plants as a repair mechanism when they are injured. In tissue culture, dedifferentiated callus can be induced to form plantlets that grow into normal plants. The induction of callus occurs when a sterile explant is brought into contact with a nutrient medium, which contains substances that initiate cell division and support growth. An explant may be a uniform piece of tissue or tissue derived from different cell types (Yeoman, 1973). Storage parenchyma tissue from Jerusalem... 

Liu Y, Liang Z, Zhang Y (2010) Induction and in vitro alkaloid yield of calluses and protocorm-like bodies (PLBs) from Pinellia ternata. In Vitro Cell Dev Biol Plant 46 239-244... 

Legha, M.R., Prasad, K.V., Singh, S.K., Kaur, C., Arora, A., Kumar, S., 2012. Induction of carotenoid pigments in callus cultures of Calendula officinalis L. in response to nitrc en and sucrose levels. In Vitro Cell Dev. Biol. Plant 48, 99-106. 

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