TAILIEUCHUNG - Báo cáo toán học: "Compared water deficit response of two Populus x euramericana clones, Luisa Avanzo and Dorskamp"

Tuyển tập các báo cáo nghiên cứu về lâm nghiệp được đăng trên tạp chí lâm nghiệp quốc tế đề tài: Compared water deficit response of two Populus x euramericana clones, Luisa Avanzo and Dorskamp. | 261 Ann. For. Sci. 57 2000 261-266 INRA EDP Sciences Original article Compared water deficit response of two Populus x euramericana clones Luisa Avanzo and Dorskamp Franck Brignolas Cécile Thierry Gilles Guerrier and Eric Boudouresque Laboratoire Biologie des Ligneux EA 1207 Université d Orléans BP. 6759 F-45067 Orléans Cedex 02 France Received 22 June 1999 accepted 31 August 1999 Abstract - The drought response of two Populus x euramericana clones cv Dorskamp and Luisa Avanzo was investigated using potted cuttings growing in a greenhouse. The cv Dorskamp clone is known to be more tolerant than Luisa Avanzo under field conditions. Watering was withheld and several parameters followed during the onset of drought. The relation between predawn leaf water potential T and soil water content differed between clones i T tended to decline when soil water content decreased below a threshold of S .H v v and v v for Dorskamp and Luisa Avanzo respectively and ii T wp of stressed cuttings reached MPa and MPa for Dorskamp and Luisa Avanzo respectively. Under well watered conditions Luisa Avanzo had greater relative rates of increase in number of leaves and leaf growth than in Dorskamp. In response to water stress the relative rates of increase in number of leaves and leaf growth did not significantly differ between the two clones for similar T wp values. Thus the growth advantage of Luisa Avanzo observed under control condition appeared counterbalanced by its higher susceptibility to water stress. Our results corroborated field observations on mature trees. drought leaf area Populus x euramericana predawn water potential soil water content Résumé - Comparaison de la réponse à un arrêt d arrosage de deux clones de Populus x euramericana Luisa Avanzo et Dorskamp. La réponse à un stress hydrique de deux clones de Populus x euramericana cv Dorskamp et Luisa Avanzo a été étudiée en serre à partir de boutures en pots. Le stress a été initié par arrêt d arrosage et .

TÀI LIỆU LIÊN QUAN
Đã phát hiện trình chặn quảng cáo AdBlock
Trang web này phụ thuộc vào doanh thu từ số lần hiển thị quảng cáo để tồn tại. Vui lòng tắt trình chặn quảng cáo của bạn hoặc tạm dừng tính năng chặn quảng cáo cho trang web này.