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The influence of cytokinins on apple embryo photosensitivity and acid phosphatase activity during stratification

Vliv eytokinin⫲ na fotosensitivitu embrya jabloně a na aktivitu kyselé fosfatázy během stratifikace

  • Published:
Biologia Plantarum

Abstract

Kinetin (KIN) and benzyladenine (BA) stimulate to different extent the germination of apple embryos isolated from dormant seeds or seeds submitted to stratification. KIN is much more active in the replacement of light requirement in apple embryos germination. Both cytokinins decrease the photosensitivity of embryos isolated from the seeds stratified less than one month, but only BA accelerates the appearance of the second photosensitivity maximum, normally occuring on the 70th day of stratification. Both cytokinins stimulate the activity of acid phosphatase between the 30th and 50th day of apple seed stratification. The stimulation between the 50th day and the end of stratification is exerted only by KIN.

These differences allow to discuss the specificity of action of particular cytokinins during the after-ripening and germination of apple embryos.

Abstract

Kinetin (KIN) a benzyladenin (BA) stimulují různou měrou klíčení jabloňových embryí isolovaných z dormantních semen anebo ze semen podrobených stratifikaci. KIN je mnohem aktivnější při nahražení požadavku na světlo při klíčení. Oba cytokininy snižují fotosensitivitu embryí isolovaných ze semen stratifikovaných méně než jeden měsíc, ale pouze BA urychluje objevení se druhého maxima fotosensitivity, které se normálně vyskytuje po 70 dnech stratifikace. Oba cytokininy stimulují aktivitu kyselé fosfatázy mezi 30 a 50 dnem stratifikace jabloňových semen. Mezi 50 dnem a koncem stratifikace má stimulační účinek pouze KIN.

Tyto rozdíly umožňují úvahy o specificitě účinku jednotlivých cytokininů během zrání a klíčení jabloňových embryí.

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Authors and Affiliations

  1. Institute of Botany, The University of Warsaw, Poland

    St. Lewak & Barbara Bryzek

Authors
  1. St. Lewak
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  2. Barbara Bryzek
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Additional information

This work was supported in part by the Project No 09.1.7.6.3.2 coordinated by Institute of Ecology, Polish Academy of Sciences.

Address: Krakowskie Przedmieście 26/28, 00-927/1 Warszawa, Poland.

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Lewak, S., Bryzek, B. The influence of cytokinins on apple embryo photosensitivity and acid phosphatase activity during stratification. Biol Plant 16, 334–340 (1974). https://doi.org/10.1007/BF02920993

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  • DOI: https://doi.org/10.1007/BF02920993

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