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Callus initiation from scutellum region of rice seeds on rice callusing medium (RCM) a RCM1- Necrotic and rhizogenic callus; b RCM2- Necrotic and slow growing callus; c RCM3- Low rate of scutellar calli; d RCM4- Non-scutellar and rhizogenic callus; e RCM5- Slow growing callus with root emergence; f RCM6- Compact rough surface callus with pale yellow colour, high rate of scutellar callus
