Tikhova G., Pridacha V., Sazonova T. Study of the water potential dynamics in Betula pendula Roth trees using cosinor- analysis // Principy èkologii. 2015. № 3. P. 60‒72. DOI: 10.15393/j1.art.2015.4321


Issue № 3

Original research

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Study of the water potential dynamics in Betula pendula Roth trees using cosinor- analysis

Tikhova
   Galina Petrovna
Forest Research Institute of Karelian Research Center RAS, tikhovag@gmail.com
Pridacha
   Vladislava Borisovna
Forest Research Institute of Karelian Research Centre, RAS, pridacha@krc.karelia.ru
Sazonova
   Tatyana Arkadyevna
Forest Research Institute of Karelian Research Centre, RAS, sazonova@krc.karelia.ru
Keywords:
Betula pendula Roth
Betula pendula Roth var. carelica
water potential
diurnal biorhythm
seasonal dynamics
cosinor-analysis.
Summary: On the basis of measured data on Ψ diurnal and seasonal variations, the additive model of water potential (Ψ) seasonal dynamics in silver birch (Betula pendula Roth) and curly (Karelian) birch (Betula pendula Roth var. carelica) was developed using cosinor- analysis. The analysis of Ψ time series revealed that diurnal Ψ biorhythms in silver birch and curly birch shoots changed unidirectionally over the growing season although the scope of variability differed significantly. More substantial changes of the studied parameter during the growing season were noted in curly birch. It was shown that the modeling of biorhythms of water status parameters enables to understand better the processes of water regime regulation in plants, as it allows detecting specific intra-species differences, which are difficult to determine using conventional methods of statistical data treatment.

© Petrozavodsk State University

Reviewer: N. Vasilevskaya
Reviewer: A. V. Korosov
Received on: 21 July 2015
Published on: 12 November 2015

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