不同草坪草种及品种苗期抗旱性比较

摘要

The pot experiment was conducted to study drought tolerance of eight cultivars of turfgrass at seedling stage in green house.The results showed that:the relative water content of leaves and relative growth rate of plant were decreased;meanwhile;relative electrical conductivity rate and free proline accumulation were increased.Eight turfgrass cultivars were divided into three drought tolerance classes:the first class:Fylking,Wabash,Policy;the second class:Nassau,Argyle,Alene;the third class:A/sL,Derby.%采用盆栽法，在苗期干旱胁迫下，测定不同草坪草及品种的相对含水量、相对生长率、游离脯氨酸含量及细胞膜相对透性等指标，以期综合评价8个草坪草品种的抗旱性能，结果表明：供试材料在苗期处于干旱胁迫下，叶片相对含水量、植株相对生长率均趋下降，相对电导率与游离脯氨酸的含量则有所增加，在灌水后均有程度不同的恢复。综合分析结果，可将8个品种分成3个耐旱级别：1级(相对耐旱)：菲尔金、瓦巴斯和宝丽丝；2级(中等耐旱)：纳苏、阿吉尔和阿丽尼；3级(相对敏感)：A/SL和德比。