狗牙根抗盐性评价及抗盐机理研究进展

被引:22
作者
陈静波 [1 ,2 ]
刘建秀 [1 ]
机构
[1] 江苏省中国科学院植物研究所南京中山植物园
[2] 南京农业大学园艺系
关键词
狗牙根; 抗盐性; 评价; 离子调节; 渗透调节;
D O I
暂无
中图分类号
S688.4 [草坪与地被植物];
学科分类号
摘要
狗牙根是一种重要的暖季型草坪草、牧草和水土保持植物。笔者对狗牙根抗盐性评价及抗盐机理方面的研究进行了综述。目前已经对狗牙根属内及与其他草种间进行了广泛的抗盐性评价,认为其具有较强的抗盐性,能够在盐碱地生长,并且存在较大的属内基因型变异;从种间来看,狗牙根的抗盐性通常弱于盐草、沟叶结缕草、海雀稗等草种,而强于结缕草、虎尾草、野牛草、假俭草、高羊茅等草种。在抗盐机理上,已经在离子(主要为Na+、K+)调控和渗透调节上取得一些进展,狗牙根主要通过盐腺分泌盐离子、离子选择运输、气孔调节等来降低地上部分盐离子积累,通过积累甜菜碱、脯氨酸、可溶性糖等有机物来进行渗透调节。将来的研究应主要侧重于离子选择性吸收、运输、分配和有机渗透调节物质合成关键基因的确定及表达调控机制。
引用
收藏
页码:302 / 310
页数:9
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