Embryonal growth-correlative effects in pea seedlings as reflected in the level of endogenous gibberellin-like and cytokinin-like substances

Klíčová, Š.; Šebánek, J.; Slezaková, M.; Čurda, K.

doi:10.1007/bf02885313

Cited by 2 publications

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“…Klíčová et al (1986) studied the effect of radicle and/or plumule excision on the level of cytokinins in the plumule and/or radicle in pea seedlings. However, these authors only tried to estimate so-called cytokinin-like substances using the Amaranthus-bioassay 24 and 48 hours after the excision of radicle and/or plumule.…”

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Role of cytokinins in growth correlations between roots and stems in pea (Pisum sativum L.) seedlings

Fišerová¹,

Šebánek²,

Hradilík³

et al. 2006

PLANT SOIL ENVIRON

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Pea seeds were swollen in solutions with different concentrations of cytokinin benzyladenine (BA). As compared with controls, a low concentration of BA (0.05 mg/l) did not affect the growth of stems and roots of twelve-day-old seedlings but concentrations of 0.20-4.00 mg/l showed an inhibiting effect; this inhibition was proportional to the concentration of BA. In controls the ratio between the lengths of stems and roots was equal to 1.14, while in seedlings influenced by BA in concentration of 0.20 mg/l its value was significantly lowered to 0.91. Also in six-day-old pea seedlings cultivated under in vitro conditions, BA concentrations of 0.70 and 3.30 mg/l inhibited the growth of roots and epicotyls and significantly increased the production of ethylene (by 150 and 330%, respectively). Three hours after the amputation of the root of five-day-old pea seedlings the level of cytokinin trans-zeatin increased in the apical part of the stem. Within the interval of 48 hours after the amputation of the root the concentration of this plant hormone gradually decreased again. The initial increase in the zeatin level in the stem indicates that the absence of the root induces a reduction of growth-inhibiting effects of roots, which negatively influences the zeatin level in the stem apex at the beginning of germination.

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confidence: 99%