Factors affecting podophyllotoxin yield in the ex situ grown Podophyllum hexandrum , an endangered alpine native of the western Himalayas
Identifieur interne : 001215 ( Main/Exploration ); précédent : 001214; suivant : 001216Factors affecting podophyllotoxin yield in the ex situ grown Podophyllum hexandrum , an endangered alpine native of the western Himalayas
Auteurs : Rekha Kushwaha [États-Unis] ; Amita Bhattacharya [Inde] ; Bikram Singh [Inde] ; R. D. Singh [Inde]Source :
- Journal of Natural Medicines [ 1340-3443 ] ; 2012-01-01.
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Abstract
Abstract: This study reports an appreciable yield of podophyllotoxin (PDT) in P. hexandrum plants grown ex situ under polyhouse conditions of a temperate locale. The PDT content of below-ground parts was affected by both plant age and growth period. However, only the effect of plant age on PDT content was significant. Thus, the highest amounts of PDT were recorded in the below-ground parts of 2-year-old plants harvested during the late-growth period (LGP). High total soluble sugars in the below-ground parts during the early growth period (EGP) and the highest nitrate and nitrate reductase in the leaves of 2-year-old plants during the peak-growth period (PGP) indicated higher mobilization and assimilation of starch and nitrate. Probably the surplus carbon and nitrogen gained during the PGP were diverted from aerial parts to below-ground parts during the LGP and in turn contributed to the synthesis of higher amounts of PDT. This study shows that commercial cultivation of P. hexandrum is possible under ex situ temperate conditions.
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DOI: 10.1007/s11418-011-0541-y
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Singh</name><affiliation wicri:level="1"><country xml:lang="fr">Inde</country><wicri:regionArea>Division of Biodiversity, Institute of Himalayan Bioresource Technology, 176 061, Palampur, HP</wicri:regionArea><wicri:noRegion>HP</wicri:noRegion></affiliation></author></analytic><monogr></monogr><series><title level="j">Journal of Natural Medicines</title><title level="j" type="abbrev">J Nat Med</title><idno type="ISSN">1340-3443</idno><idno type="eISSN">1861-0293</idno><imprint><publisher>Springer Japan</publisher><pubPlace>Japan</pubPlace><date type="published" when="2012-01-01">2012-01-01</date><biblScope unit="volume">66</biblScope><biblScope unit="issue">1</biblScope><biblScope unit="page" from="1">1</biblScope><biblScope unit="page" to="7">7</biblScope></imprint><idno type="ISSN">1340-3443</idno></series></biblStruct></sourceDesc><seriesStmt><idno type="ISSN">1340-3443</idno></seriesStmt></fileDesc><profileDesc><textClass><keywords scheme="KwdEn" xml:lang="en"><term>Age</term><term>C and N allocation</term><term>Ex situ</term><term>Growth period</term><term>Podophyllotoxin yield</term><term>Podophyllum hexandrum</term></keywords></textClass><langUsage><language ident="en">en</language></langUsage></profileDesc></teiHeader><front><div type="abstract" xml:lang="en">Abstract: This study reports an appreciable yield of podophyllotoxin (PDT) in P. hexandrum plants grown ex situ under polyhouse conditions of a temperate locale. The PDT content of below-ground parts was affected by both plant age and growth period. However, only the effect of plant age on PDT content was significant. Thus, the highest amounts of PDT were recorded in the below-ground parts of 2-year-old plants harvested during the late-growth period (LGP). High total soluble sugars in the below-ground parts during the early growth period (EGP) and the highest nitrate and nitrate reductase in the leaves of 2-year-old plants during the peak-growth period (PGP) indicated higher mobilization and assimilation of starch and nitrate. Probably the surplus carbon and nitrogen gained during the PGP were diverted from aerial parts to below-ground parts during the LGP and in turn contributed to the synthesis of higher amounts of PDT. This study shows that commercial cultivation of P. hexandrum is possible under ex situ temperate conditions.</div></front></TEI><affiliations><list><country><li>Inde</li><li>États-Unis</li></country><region><li>Kentucky</li></region></list><tree><country name="États-Unis"><region name="Kentucky"><name sortKey="Kushwaha, Rekha" sort="Kushwaha, Rekha" uniqKey="Kushwaha R" first="Rekha" last="Kushwaha">Rekha Kushwaha</name></region></country><country name="Inde"><noRegion><name sortKey="Bhattacharya, Amita" sort="Bhattacharya, Amita" uniqKey="Bhattacharya A" first="Amita" last="Bhattacharya">Amita Bhattacharya</name></noRegion><name sortKey="Bhattacharya, Amita" sort="Bhattacharya, Amita" uniqKey="Bhattacharya A" first="Amita" last="Bhattacharya">Amita Bhattacharya</name><name sortKey="Singh, Bikram" sort="Singh, Bikram" uniqKey="Singh B" first="Bikram" last="Singh">Bikram Singh</name><name sortKey="Singh, R D" sort="Singh, R D" uniqKey="Singh R" first="R. D." last="Singh">R. D. Singh</name></country></tree></affiliations></record>Pour manipuler ce document sous Unix (Dilib)
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