草业学报Issue(4)：220-228,9.DOI:10.11686/cyxb20140427
不同早熟禾品种对干旱胁迫的生理响应及抗旱性评价
Physiological response to drought stresses and drought resistances evaluation of different Kentucky bluegrass varieties
摘要
Abstract
To compare the drought resistance of bluegrass seedlings,the 14 varieties of Kentucky bluegrass seed were sowing after disinfection in the plastic pots,then thinned after emergence and fixed strains at 2 to 3 true leaf,left 1 5 uniform growth and distribution plants in every pot and regularly watering to ensure the normal growth of the seedlings.Drought stress trails were identified at 2 to 3 true leaf period by adding the PEG-6000 according to the Michel formula which are:0 MPa (control),-0 .3 ,-0 .6 ,-0 .9 ,-1 .2 MPa in the study. Then supplement water every two days to maintain the concentration.Two groups of drought treatment and control (normal watering)were set to simulate drought stress of 14 bluegrass cultivars and four replications were set by treatment.The physiological and biochemical index,such as chlorophyll (CHL),malondialdehyde (MDA)content,proline (Pro)content,peroxidase (POD)and superoxide dismutase (SOD)activity were measured and analyzed.The content of CHL was decreased;and the content of the Pro,MDA and SOD showed upward trend;the POD activity increased at first and then decreased and finally increase again in the bluegrass seedlings;Drought resistance of 14 bluegrass varieties were obtained by subordinate function the or-der is:The No.3 Storpy>No.10 Narrow leaf bluegrass>No.1 Meri>No.2 Geronimoi= No.9 Blue apphire>No.7 Kentucky bluegrass>No.11 Kentucky bluegrass>No.4 Kentucky bluegrass>No.5 Wabash>No.8 Bluegrass= No.13 Kentucky>No.14 Kentucky bluegrass>No.6 Monopoly= No.12 Fylking.关键词
早熟禾/干旱胁迫/生理生化指标/苗期/PEGKey words
Kentucky bluegrass/drought stress/physiological responses/seedling stage/PEG分类
农业科技引用本文复制引用
郭郁频,米福贵,闫利军,任永霞,吕世杰,伏兵哲..不同早熟禾品种对干旱胁迫的生理响应及抗旱性评价[J].草业学报,2014,(4):220-228,9.基金项目
国家十二五科技支撑项目（2011BAD17B05）资助。 （）
