Abstract
In the present studies an attempt has been made to evaluate the effect of various plant growth regulators on the yield of sennosides in C. angustifolia. The growth regulators which increased the yield of sennosides either by increasing their percentage or by increasing the total growth of plants were N, N–Succinic acid dimethylhydrazide (B9), (2–Chloroethyl) trimethyl ammoniumchloride (CCC), 2–Chloroethyl phosphonic acid (Ethrel), Maleic hydrazide (MH) and 6–Furfuryl–aminopurine (Kinetin). Treatments with Indole–3–acetic acid (IAA), Gibberellic acid (GA) and Phosfon–D were not beneficial in increasing either sennosides content or dry matter accumulation in shoot.
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