Gibberellin-cytokinin interaction in the correlation between the cotyledon and its axillary bud in pea (Pisum sativum L.)

Šebánek, J.; Obhlídalová, Libuše

doi:10.1007/bf02920978

Cited by 2 publications

(1 citation statement)

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“…According to these results the state of inhibition of lateral bud should be connected with a supraoptimal level of endogenous auxin and thus the release of the bud from this inhibition should be connected with an initial decrease in the endogenous level of auxin. This was indicated by experimental results published by Šebánek & Hradilík (1974) and Blažková et al (1987). Snow (1925Snow ( , 1937 mentioned the suitability of dicotylar models for studies on apical dominance.…”

Section: Introductionmentioning

confidence: 52%

Release of cotyledonary shoots of pea (Pisum sativum) seedlings from inhibition as related to endogenous zeatin and ethylene and exogenous IAA and benzyladenine

et al. 2007

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This paper deals with apical dominance using a dicotylar model obtained after decapitation of pea seedlings with two shoots -one dominant and the other inhibited. When the dominant shoot was decapitated the inhibited one is released from inhibition and after 24 to 72 h begins to grow. However, the levels of trans-zeatin and production of ethylene increase within 4 and 6 hours respectively after release from inhibition, and within an interval of 72 h the levels of both phytohormones begin gradually to decrease. This indicates that also in this model, the release from apical dominance is associated with an increase in the level of cytokinin zeatin and, thereafter, also with an increased production of ethylene. If indolyl-3-acetic acid (IAA) is applied on the decapitated main stem after decapitation of the dominant shoot, the growth of the initially inhibited one is very strongly retarded; if, however, IAA is applied on the decapitated dominant shoot, this inhibition is significantly weaker. This means that the inhibiting effect of IAA on the inhibited shoot originates to a greater degree from the main stem rather than from the dominant shoot. The effect of benzyladenine (BA) is transferred equally from the decapitated main stem and from the decapitated dominant shoot because the initially inhibited shoot begins to grow as well as also other shoots from serial cotyledonary buds.

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Section: Introductionmentioning

confidence: 52%