Responses of leaf gas exchange, water relations, and water consumption in seedlings of four semiarid tree species to soil drying

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

Abstrakty

EN

To understand the response patterns to soil drying and the water use properties of commonly reforested trees in the semiarid Loess Plateau region of China, a glasshouse experiment was carried out with the seedlings of four species, i.e., Robinia pseudoacacia, Armeniaca sibirica, Syringa oblata, and Quercus liaotungensis. Severe water stress induced by withholding water resulted in permanent wilting of most of the seedlings pot-cultured with sandy soil in 8–12 days. Predawn and midday leaf water potentials and gas exchange characteristics (e.g., stomatal conductance) in the seedlings did not show marked changes until the volumetric soil water content decreased to about 0.05. As the soil water content decreased further, these physiological parameters rapidly declined, approaching their minimal levels at the stage of permanent wilting. The response of each parameter to soil water content changes was fitted with a non-linear saturation curve. Though the results suggested that the general pattern of responses to soil drying was identical among the species, quantitative differences in drought tolerance and water use properties were detected. Leaf stomatal conductance in R. pseudoacacia and A. sibirica showed earlier responses to reduced predawn leaf water potentials. However, water use characteristics and specific leaf area indicated that these two species consumed more water and may not be as drought tolerant as S. oblata and Q. liaotungensis. These results may provide important information to compare the reforestation species with respect to soil drying.

• Wydawca: -
• Czasopismo: Acta Physiologiae Plantarum
• Rocznik: 2010
• Tom: 32
• Numer: 1
• Opis fizyczny: p.183-189,fig.,ref.

Twórcy

autor

Yan M.J.

• Franciszek Górski Institute of Plant Physiology of the Polish Academy of Sciences

autor

Yamanaka N.

• Franciszek Górski Institute of Plant Physiology of the Polish Academy of Sciences

autor

Yamamoto F.

• Franciszek Górski Institute of Plant Physiology of the Polish Academy of Sciences

autor

Du S.

• Franciszek Górski Institute of Plant Physiology of the Polish Academy of Sciences

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