羊茅种质资源苗期抗旱生理响应及综合评价  

Physiological Response and Comprehensive Evaluation on the Drought Resistance of Germplasm Resources at Seedling Stage in Festuca

作　　者：张东玲[1] 刘建宁[2] 王运琦[2] 吴欣明[2] 石永红[2] 王赞[3] 郭璞[2] 池惠武[2] 

机构地区：[1]山西省农业科学院农业资源综合考察研究所,山西太原030006 [2]山西省农业科学院畜牧兽医研究所,山西太原030032 [3]中国农业科学院北京畜牧兽医研究所,北京100094

出　　处：《山西农业科学》2010年第10期20-25,共6页Journal of Shanxi Agricultural Sciences

基　　金：国家科技支撑计划项目(2007BAD56B02;2008BADB3B01)

摘　　要：以引进的18份羊茅属(Festuca L)为材料,在苗期持续干旱胁迫下,研究其生理指标变化,并对其抗旱性进行综合评价。结果表明:脯氨酸、可溶性糖、细胞质膜透性随着干旱胁迫的加大而显著增加,叶片相对含水量则显著递减。膜系统受损程度与叶片保水和抗旱性呈负相关。干旱胁迫限制了植株的生长发育,所试材料地上、地下生物量及高度都不同程度地受到抑制,抑制程度因不同材料基因型而有所不同。羊茅属材料抗旱性与生物量、株高呈正相关。采用隶属函数对其抗旱性进行综合评价,18份羊茅相对抗旱的材料是8,9,12,对干旱相对敏感的材料是5,6,15。18 accessions of festuca germplasmresource were tested undercontinuous drought to study physiological response and comprehensive evaluation at seedling stage.The result shows：the proline,soluble sugar,membrane permeability content increased with the increasing of drought stress significantly,leaf relative watercontent decreasded sharply.It was negatively related between the damage of membrane system and leaf retention of water content under drought stress.Growing development was limited under drought stress.The height,aboveground biomass,underground biomass of 18 accesses were dropped at different degree depending on tested genotypes.A positive correlation was shown between drought resistance and height,aboveground biomass,underground biomass et al morphological indexes.The drought resistance of these materials were comprehensively evaluated with membership function method.The above synthesis shows that the accessions 8,9,12 are of drought tolerance and the accessions 5,6,15 relatively drought sensitive.

关 键 词：羊茅 干旱胁迫 生理 评价 

分 类 号：S543.9[农业科学—作物学]