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Question 39 of 51

Q.Solidifying agent used in plant tissue culture is :

(a) EDTA
(b) Nicotinic acid
(c) Agar
(d) Cobaltous chloride
Tamil Nadu DgeTamil Nadu HSC (DGE) Board 2023MCQ· 1mImportance★★★★★
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Agar, a red-algal polysaccharide, is the standard gelling agent used to solidify plant tissue culture media.

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Plant tissue culture media are usually prepared as semi-solid (gelled) media so that the explant/callus sits stably on the surface with good aeration, rather than being submerged as in liquid culture. Agar (agar-agar) is the almost universal choice of gelling agent for this purpose: it is a polysaccharide extracted from certain red algae (Rhodophyta), such as Gelidium and Gracilaria.

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