| 玉米幼苗对风速变化的逆境生理响应 |
| |
| 引用本文： | 赵哈林,李 瑾,周瑞莲,曲 浩,云建英.玉米幼苗对风速变化的逆境生理响应[J].干旱地区农业研究,2015,33(6):242-246. |
| |
| 作者姓名： | 赵哈林 李 瑾 周瑞莲 曲 浩 云建英 |
| |
| 作者单位： | 中国科学院寒区旱区环境与工程研究所, 甘肃 兰州 730000,中国科学院寒区旱区环境与工程研究所, 甘肃 兰州 730000,鲁东大学生命科学学院， 山东 烟台 264025,中国科学院寒区旱区环境与工程研究所, 甘肃 兰州 730000,中国科学院寒区旱区环境与工程研究所, 甘肃 兰州 730000 |
| |
| 基金项目： | 国家自然科学基金项目(31270752，30972422) |
| |
| 摘 要： | 为了解玉米幼苗对不同强度风吹危害的逆境生理响应特征，2013年在内蒙古东部科尔沁沙地研究了0（CK）、9、15 m·s-1和18 m·s-1净风吹袭20 min下玉米幼苗丙二醛含量（MDA）、膜透性、保护酶活性和渗透调节物质含量的变化。结果表明：随着风吹强度增加，玉米的株高、茎粗生长量和地上生物量下降，其中18 m·s-1处理的株高和茎粗生长量及地上生物量分别较CK下降4.48%、11.28%和13.23%；风吹胁迫下玉米幼苗丙二醛含量与CK没有显著差异，但各处理膜透性均显著高于CK，其中15 m·s-1和18 m·s-1处理膜透性分别较CK增加84.36%和116.62%；随着风吹强度增强，SOD、POD和CAT活性均趋于增加，其中18 m·s-1处理分别较CK增加37.45%、94.65%和82.14%；随着风吹强度增强，可溶性糖含量明显增加，脯氨酸含量趋于下降，和CK相比，18 m·s-1处理的可溶性糖含量增加31.48%，脯氨酸含量下降40.26%。结果表明，20 min风吹处理已对玉米生长产生抑制作用，虽未导致玉米幼苗明显的膜脂过氧化，却使其细胞膜受损，SOD、POD和CAT在防止其膜脂过氧化过氧化过程中共同发挥了保护细胞膜的作用，可溶性糖起到了渗透调节作用。
|
| 关 键 词： | 风吹 玉米幼苗 膜透性 保护酶 渗透调节物质 |
Physiological responses of corn seedlings to changes in wind speed |
| |
| ZHAO Ha-lin,LI Jin,ZHOU Rui-lian,QU Hao,YUN Jian-ying.Physiological responses of corn seedlings to changes in wind speed[J].Agricultural Research in the Arid Areas,2015,33(6):242-246. |
| |
| Authors: | ZHAO Ha-lin LI Jin ZHOU Rui-lian QU Hao YUN Jian-ying |
| |
| Abstract: | In order to understand the physiological response mechanism of corn(Zea mays L) seedlings to different wind speeds, changes on MDA content, membrane permeability, protective enzymes activities and osmotic regulation substances contents with 0 (CK), 9, 15 m·s-1 and 18 m·s-1 wind speed treatments were studied during the spring 2013 in the Horqin sand land of Inner Mongolia. The results showed that with the increase of wind speed, plant height, stem diameter and above-ground biomass were decreased by 4.48%, 11.28% and 13.23%, respectively, with 18 m·s-1 treatment from those with the CK treatment. There were not significant differences in MDA contents between the wind treatments and the CK, but membrane permeability with the wind treatments was significant higher than that with the CK, increased by 84.36% and 116.62% from the CK under 15 m·s-1 and 18 m·s-1 treatments, respectively. Activities of SOD, POD and CAT were elevated with the increase of wind strength, reaching additional increases of 37.45%, 94.65% and 82.14% by the 18 m·s-1 treatment from the CK, respectively. Soluble sugar contents became increased significantly and proline contents went decreased by wind strength, resulting in an increase of 31.48% in soluble sugar and a decrease of 40.26% in proline from the CK by the 18 m·s-1 treatment. The results suggested that although increase of wind strength did not cause significant membrane lipid peroxidation in corn seedling, it posed a significant damage of the membrane permeability. The synchronous increases of the SOD, POD and CAT activities implied that these protective enzymes played important roles in prevent lipid peroxidation and protections of cell membrane. Additionally, soluble sugar might play an effective role in osmotic adjustment to wind stress. |
| |
| Keywords: | wind treatment corn seedling membrane permeability protective enzyme osmoregulation substance |
| 本文献已被 万方数据 等数据库收录！ |
| 点击此处可从《干旱地区农业研究》浏览原始摘要信息 |
| 点击此处可从《干旱地区农业研究》下载免费的PDF全文 |
|
