Temporal dynamics of stomatal conductance of plants under water deficit: can homeostasis be improved by more complex dynamics?

Brazilian Archives of Biology and Technology

Gustavo Maia Souza²  Ricardo Ferraz De Oliveira²  Victor José Mendes Cardoso¹ 

[1] ,USP Escola Superior de Agricultura 'Luiz de Queiroz' Departamento de Ciências BiológicasPiracicaba SP ,Brazil

关键词: Beta vulgaris;    complexity;    Helianthus annus;    stability;    time series analyses;    water deficit;   

DOI  :  10.1590/S1516-89132004000300013

来源: SciELO

【 摘 要 】

In this study we hypothesized that chaotic or complex behavior of stomatal conductance could improve plant homeostasis after water deficit. Stomatal conductance of sunflower and sugar beet leaves was measured in plants grown either daily irrigation or under water deficit using an infrared gas analyzer. All measurements were performed under controlled environmental conditions. In order to measure a consistent time series, data were scored with time intervals of 20s during 6h. Lyapunov exponents, fractal dimensions, KS entropy and relative LZ complexity were calculated. Stomatal conductance in both irrigated and non-irrigated plants was chaotic-like. Plants under water deficit showed a trend to a more complex behaviour, mainly in sunflower that showed better homeostasis than in sugar beet. Some biological implications are discussed.

【 授权许可】

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