GA3 induced flowering in Podophyllum hexandrum Royle: A rare alpine medicinal herb |
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Authors: | Hemant Pandey Shyamal K Nandi Bhuwan Chandra Mohammad Nadeem Lok Man S Palni |
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Institution: | (1) G.B. Pant Institute of Himalayan Environment & Development, Kosi - Katarmal, 263 643 Almora, India |
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Abstract: | Podophyllum hexandrum Royle, an important alpine herb, is the source of highly valued podophyllotoxin. The effect of some plant growth substances
(GA3, BAP & ABA), uniconazole (an inhibitor of GA biosynthesis), and a combination of GA3 and uniconazole were examined in respect to influence on sprouting in rhizomes of P. hexandrum and on induction of flowering at a lower altitude. Amongst the various chemicals tested, GA3 had a marked effect resulting in uniform sprouting and also induced flowering in about half of the treated rhizomes. While
BAP also promoted early sprouting, delayed sprouting was seen in rhizomes treated with ABA. Uniconazole treatment, either
alone or with GA3 was found to inhibit flowering and also resulted in reduced plant height. GA3 treatment of rhizomes from plants that was maintained for up to 30 months at a lower altitude also induced flowering thus
replacing the normal chilling requirement of plants. These results suggest that treatment of GA3 could be effectively used for inducing uniform sprouting and flowering in rhizomes of P. hexandrum grown at lower altitudes. |
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Keywords: | Alpine Flowering GA3 Lower altitude Podophyllum hexandrum Uniconazole |
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