The release of the cotyledonary shoot of Pisum sativum from inhibition in relation to changes in the levels of endogenous auxins, cytokinins, and gibberellins.

Autor: Šebánek, Jiří, 1926-2013
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Jazyk: angličtina
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Druh dokumentu: Non-fiction
ISSN: 0006-3134
Abstrakt: Abstract: Both axillary buds belonging to the cotyledons (cotyledonary buds) start to grow on decapitated pea seedlings, but one of them (the dominant shoot) prevails in growth over the other (the inhibited shoot). If the dominant' cotyledonary shoot is removed, the inhibited shoot is released from inhibition and starts to grow. This release from inhibition of the inhibited cotyledonary shoot is accompanied within two hours from the removal of the dominant cotyledonary shoot by a marked increase in the level of endogenous cytokinin-like substances and by a decrease in the level of endogenous IAA. By contrast, a significant increase in IAA level and a decreasing trend in the level of cytokinin-like substances occur in the originally inhibited cotyledonary shoot between hour 4 and hour 48 after the release from inhibition of the inhibited cotyledonary shoot. The level of gibberellin-like substances in the cotyledonary shoot released from inhibition steadily increases from the beginning of the release.
Databáze: Katalog Knihovny AV ČR
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