Differences in physiological adaptation of Haberlea rhodopensis Friv. leaves and roots during dehydration - rehydration cycle

• Autorzy: Peli E.R. , Mihailova G. , Petkova S. , Tuba Z. , Georgieva K.
• Języki publikacji: EN

Abstrakty

EN

The ecophysiological responses of the homoiochlorophyllous desiccation-tolerant (HDT) plant Haberlea rhodopensis showed that this plant could tolerate water deficit and both leaves and roots had high ability to survive severe desiccation. The changes and correlation between CO₂ assimilation, stomatal conductance, contents of photosynthetic pigments, root respiration and specific leaf area during dehydration–rehydration cycle were investigated. The physiological activity of leaves and roots were examined in fully hydrated (control) plants and during 72 h of dehydration, as well as following 96 h of rehydration every 6 and 24 h. After 6 h of dehydration, the stomatal conductance declined and the intercellular CO₂ concentration increased. The reduction in CO₂ assimilation rate was observed after 54 h of dehydration. There was a good correlation between the root respiration and water content. Our results showed that the plasticity of adaptation in leaves and roots were different during extreme water conditions. Roots were more sensitive and reacted faster to water stress than leaves, but their activity rapidly recovered due to immediate and efficient utilization of periodic water supply.

• Wydawca: -
• Czasopismo: Acta Physiologiae Plantarum
• Rocznik: 2012
• Tom: 34
• Numer: 3
• Opis fizyczny: p.947-955,fig.,ref.

Twórcy

autor

Peli E.R.

• "Plant Ecology" Research Group of Hungarian Academy of Sciences, Institute of Botany and Ecophysilogy, Szent Istvan University, Pater K. 1, 2103 Godollo, Hungary

autor

Mihailova G.

• Institute of Plant Physiology and Genetics, Bulgarian Academy of Sciences, Acad. G. Bonchev Str. Bl. 21, 1113 Sofia, Bulgaria

autor

Petkova S.

• Institute of Plant Physiology and Genetics, Bulgarian Academy of Sciences, Acad. G. Bonchev Str. Bl. 21, 1113 Sofia, Bulgaria

autor

Tuba Z.

• "Plant Ecology" Research Group of Hungarian Academy of Sciences, Institute of Botany and Ecophysilogy, Szent Istvan University, Pater K. 1, 2103 Godollo, Hungary

autor

Georgieva K.

• Institute of Plant Physiology and Genetics, Bulgarian Academy of Sciences, Acad. G. Bonchev Str. Bl. 21, 1113 Sofia, Bulgaria

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