五种草坪草对水涝胁迫的反应及耐涝评价

以沟叶结缕草(Zoysia matrella(L.)Merr.)、大穗结缕草(Z.macrostachya Franch.et Sav.)、普通狗牙根(Cynodon dactylon(L.)Pers.)、青岛结缕草(Z.japonicacv QingDao)和高羊茅品种翠碧(Festuca arundinacea cv Triplet)为材料,对其在水涝胁迫下草坪草形态、生理指标变化进行了研究,并采用隶属函数法对其耐涝性进行评价,以期为江南中下游地区草坪草的栽培提供试验依据。结果表明:随水涝时间的延长,叶片枯黄率逐渐增加,叶片相对电导率(REC)、超氧化物歧化酶(SOD)和过氧化物酶(POD)活性以及游离脯氨酸(Pro)和可溶性总糖(TSC)含量5个生理指标在水胁迫15 d时均比对照明显增加;以REC,SOD和POD活性以及Pro和TSC含量为指标,对5个草种的耐涝隶属函数值进行计算,并对其耐涝适应性进行综合评价,得出5个草种的耐涝性顺序为大穗结缕草>普通狗牙根>翠碧>青岛结缕草>沟叶结缕草。

Responses of Five Turfgrasse Species to Water Stress and Tolerance Evaluation

This study describes five turfgrass species(Zoysia matrella(L.) Merr.,Z.macrostachya Franch.et Sav.,Cynodon dactylon(L.) Pers.,Z.japonica cv QingDao and Festuca arundinacea cv Triplet) to determine changes of morphological and physiological indexes during water stress.Species tolerant to excessive water were evaluated by subordinate function.Results show that leaf wilt rate,leaf relative electric conductivity(REC),superoxide dismutase(SOD) activity,peroxidase(POD) activity,content of proline and total soluble carbohydrate(TSC) were significantly increased over controls on 15th day of waterlogging.Subordinate function analysis based on REC,SOD and POD activity indicated that the order of waterlogging tolerance from high to low was: Z.macrostachya Franch.et Sav.>Cynodon dactylon(L.) Pers.>Festuca arundinacea cv Triplet>Z.japonica cv QingDao > Z.matrella(L.) Merr.