Subtitle:

Time as a growth and development factor of plants not only in in vitro cultures

Publisher:

Committee on Biotechnology PAS ; Institute of Bioorganic Chemistry PAS

Abstract:

The paper deals with time as a physical (space-time coordinate with specific properties and measure methods) as well as biological concept. Biological time is running differently taking in account various organizational levels like cell, cell organelles, whole organism and, finally, population or species. Time is a factor that regulates plant ontogenesis. In many plant species, time regulates seed dormancy and plant vernalization, photoperiodism and circadian rhythms. Time sets in motion the “biological clock” which controls physiological and biochemical processes in plant, particularly the rate of enzymatic reactions, oscillation processes (circadian or annual rhythms), as well as internal “cell clock” deciding upon the length of cell life as well as the rate of cell ageing processes. Senescence or death of particular cells do not mean death of the whole organism. In numerous plant species, death of individual cell is even a factor determining survival of the whole plant. The plant senescence is regulated by phytohormones such as abscisic acid, cytokinins or auxins. Time gathers new meaning in in vitro cultures. It may differ with respect to stable cell suspension culture in many cases maintaining an ability for cell multiplication for many years as compared to another fast regenerating cultures. The influence of various stress factors under in vitro conditions enables the “switching on” the clock controlling the processes of cell multiplication and differentiation.

Relation:

Biotechnologia, vol.75, 4 (2006)-.

Volume:

75

Issue:

4

Start page:

49

End page:

63

Detailed Resource Type:

Article

Format:

application/pdf

Resource Identifier:

0860-7796 ; oai:rcin.org.pl:87228 ; IChB B-71

Source:

Library of Institute of Bioorganic Chemistry PAS

Language:

pol

Language of abstract:

eng

Temporal coverage:

1988-2010

Rights:

Creative Commons Attribution BY-SA 4.0 license

Terms of use:

Copyright-protected material. [CC BY-SA 4.0] May be used within the scope specified in Creative Commons Attribution BY-SA 4.0 license, full text available at:

Digitizing institution:

Institute of Bioorganic Chemistry of the Polish Academy of Science

Original in:

Institute of Bioorganic Chemistry of the Polish Academy of Science

Projects co-financed by:

Operational Program Digital Poland, 2014-2020, Measure 2.3: Digital accessibility and usefulness of public sector information; funds from the European Regional Development Fund and national co-financing from the state budget.

Access:

Open