A comparison of pressure–volume curves with and without rehydration pretreatment in eight woody species of the semiarid Loess Plateau

• Autorzy: Yan M-J , Yamamoto M. , Yamanaka N. , Yamamoto F. , Liu G.-B. , Du S.
• Języki publikacji: EN

Abstrakty

EN

Pressure–volume (P–V) curves are frequently used to analyze water relation properties of woody plants in response to transpiration-induced tissue water loss. In this study, P–V analyses were conducted on eight woody species growing in the semiarid Loess Plateau region of China during a relatively dry summer season using both the recently recommended instantaneous measurement and the traditional method with rehydration pretreatment. Generally, P–V-derived parameters in this study reflected conditions in a dry growth environment. Species-specific differences were also found among P–V parameters, suggesting each species uses different mechanisms to respond to drought. Based on the results from instantaneous measurements, a descending sequence for drought tolerance ranked by water potentials at the turgor loss point (Wtlp) was Rosa hugonis[Syringa oblata = Armeniaca sibirica[ Caragana microphylla[Pyrus betulaefolia[Acer stenolobum[Quercus liaotungensis[Robinia pseudoacacia. The first five species also showed lower levels of osmotic potential at full turgor (Wp sat) and higher symplastic osmotic solute content per dry weight, suggesting they possess advantages in osmotic adjustment. Also, this study supports previous reports noting rehydration pretreatment resulted in shifts in P–V parameters. The magnitude of the shifts varied with species and water conditions. The effect of rehydration was stronger for species with higher drought tolerance or subjected to the influence of drought. Differences in the parameters among species were mitigated as a result of rehydration. Those with a lower Wtlp or midday water potential were more deeply affected by rehydration. Application of instantaneous measurements was strongly recommended for proper analysis of P–V curves particularly in arid and semiarid areas

• Wydawca: -
• Czasopismo: Acta Physiologiae Plantarum
• Rocznik: 2013
• Tom: 35
• Numer: 04
• Opis fizyczny: p.1051-1060,fig.,ref.

Twórcy

autor

Yan M-J

• State Key Laboratory of Soil Erosion and Dryland Farming on Loess Plateau, Institute of Soil and Water Conservation, Northwest A&F University, Yangling, Shaanxi 712100, China

autor

Yamamoto M.

• State Key Laboratory of Soil Erosion and Dryland Farming on Loess Plateau, Institute of Soil and Water Conservation, Northwest A&F University, Yangling, Shaanxi 712100, China

autor

Yamanaka N.

• Arid Land Research Center, Tottori University, Tottori 680-0001, Japan

autor

Yamamoto F.

• Faculty of Agriculture, Tottori University, Tottori 680-8553, Japan

autor

Liu G.-B.

• State Key Laboratory of Soil Erosion and Dryland Farming on Loess Plateau, Institute of Soil and Water Conservation, Northwest A&F University, Yangling, Shaanxi 712100, China

autor

Du S.

• State Key Laboratory of Soil Erosion and Dryland Farming on Loess Plateau, Institute of Soil and Water Conservation, Northwest A&F University, Yangling, Shaanxi 712100, China

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