Physiological responses of Kobresia pygmaea to warming in Qinghai-Tibetan Plateau permafrost region

Kobresia pygmaea (C.B. Clarke) C.B. Clarke is one dominant herbaceous species in the alpine meadows of the Qinghai-Tibetan Plateau. From 2006 to 2009, a warming experiment was conducted in this permafrost region. Two 2-year warming treatments with an annual average warming of 2.1 degrees C and 4.4 d...

Full description

Bibliographic Details
Published in:Acta Oecologica
Main Authors: Yang, Y., Wang, G. X., Yang, L. D., Guo, J. Y., Li, N.
Other Authors: Yang, Y (reprint author), Chinese Acad Sci, Inst Mt Hazards & Environm, 9 Block 4,Renmin S Rd, Chengdu 610041, Peoples R China., Chinese Acad Sci, Inst Mt Hazards & Environm, Chengdu 610041, Peoples R China., Minist Water Conservancy & Power, Chengdu 610041, Peoples R China., Peking Univ, Dept Ecol, Coll Urban & Environm Sci, Beijing 100871, Peoples R China., Chinese Acad Sci, Inst Mt Hazards & Environm, 9 Block 4,Renmin S Rd, Chengdu 610041, Peoples R China.
Format: Journal/Newspaper
Language:English
Published: 2012
Subjects:
Active oxygen species
Antioxidant capacities
Non-structural carbohydrate
Oxidative damage
UV-B RADIATION
PHASEOLUS-VULGARIS L
GLOBAL CLIMATE-CHANGE
OPEN-TOP CHAMBERS
WATER-STRESS
PROLINE ACCUMULATION
INTEGRATED APPROACH
HYDROGEN-PEROXIDE
POPULUS-CATHAYANA
ATMOSPHERIC CO2
permafrost
Online Access:https://hdl.handle.net/20.500.11897/161048
https://doi.org/10.1016/j.actao.2012.01.012
Description
Summary:Kobresia pygmaea (C.B. Clarke) C.B. Clarke is one dominant herbaceous species in the alpine meadows of the Qinghai-Tibetan Plateau. From 2006 to 2009, a warming experiment was conducted in this permafrost region. Two 2-year warming treatments with an annual average warming of 2.1 degrees C and 4.4 degrees C, and one 4-year warming treatment with an annual average warming of 2.3 degrees C were established to examine physiological responses of K. pygmaea to warming. Our results indicated that 2-years of warming increased malondialdehyde and non-structural carbohydrates in the plants. There was no effect of 2-year warming on electrolyte leakage and free proline content. In the 2-year warming treatment, superoxide dismutase activity and peroxidase activity increased, ascorbate peroxidase activity and ascorbic acid only increased in 2-year high warming treatment, whereas in the 4-year warming treatment, active oxygen species, electrolyte leakage. UV-absorbing compounds and anthocyanins decreased. The 4-year warming treatment also significantly increased non-structural carbonhydrate and free proline accumulation for osmotic adjustment. The results of this study suggest that K. pygmaea could adapt to a warmer environment in the future. (C) 2012 Elsevier Masson SAS. All rights reserved. http://gateway.webofknowledge.com/gateway/Gateway.cgi?GWVersion=2&SrcApp=PARTNER_APP&SrcAuth=LinksAMR&KeyUT=WOS:000302832700015&DestLinkType=FullRecord&DestApp=ALL_WOS&UsrCustomerID=8e1609b174ce4e31116a60747a720701 Ecology SCI(E) 4 ARTICLE 109-116 39

Similar Items