暖季型草坪草对高温胁迫的生理响应.PDF

2009 9 17 5 Chinese Journal of Eco-Agriculture, Sept. 2009, 17(5): 964−967 DOI: 10. 3724/SP.J.1011.2009.00964 * 黄锦文 陈冬梅 郑红艳 骆 娟 林争春 林文雄** ( 350002) 以沟叶结缕草(Zoysia matrella) 与结缕草(Z. japonica)为材料, 测定了高温胁迫下两种暖季型草坪草叶 片主要抗性生理指标的变化, 结果表明: 40 ℃高温处理下, 两种结缕草叶片渗透调节物质(可溶性糖、可溶性 蛋白质、脯氨酸)和ABA 、GA3 、IAA 、MDA 含量均显著增加, SOD 、POD 与CAT 酶活性都显著增强; 两种 结缕草叶片的Chla 、Chlb 、Car 含量以及Chla/Chlb 的比值则出现了不同程度的下降。高温下, 沟叶结缕草渗 透调节物质的积累量和ABA 、GA3 、IAA 含量的增加均高于结缕草, SOD 和CAT 活性的增强也大于结缕草, 表 现出更强的耐热特性。 结缕草 高温胁迫 酶活性 内源激素 : S688.4 : A : 1671-3990(2009)05-0964-04 Physiological response of warm-season turf-grass to high temperature stress HUANG Jin-Wen, CHEN Dong-Mei, ZHENG Hong-Yan, LUO Juan, LIN Zheng-Chun, LIN Wen-Xiong (Institute of Agroecology, Fujian Agriculture and Forestry University, Fuzhou 350002, China) Abstract An experiment was conducted to determine physiological responses of Zoysia matrella and Z. japonica to high tempera- ture stress. The results show that the contents of soluble sugar and protein, proline, ABA, GA3, IAA and MDA increase in two tested turf-grass species, along with increased SOD, POD and CAT activity under high temperature stress. High temperature stress treat- ment decreases chlorophyll a (Chla), chlorophyll b (Chlb) and carotenoid (Car) content, and it concurrently induces changes in leaf Chla/Chlb ratio in the two turf-grass species. The contents of the osmotic adjustment substances, ABA, GA3 and IAA are higher in Z. matrella than in Z. japonica. The same is true for SOD and CAT activity in the two turf-grass species when exposed to high tem- perature treatment. Hence Z. matrella exhibits better heat resistance than Z. japonica under high temperature conditions. Key words Zoysia grass, High temperature stress, Enzyme activity, Endogenous hormone (Received Nov. 3, 2008; accepted March 28, 2009)