干旱区生态环境知识资源中心(Arid): 玉米幼苗对风沙流强度变化的生理响应

Arid

	玉米幼苗对风沙流强度变化的生理响应
其他题名	Physiological response of corn seedlings to changes of wind-sand flow strength
	赵哈林1 ; 李瑾 1; 周瑞莲 2; 曲浩 1; 云建英 1; 潘成臣 1
来源期刊	应用生态学报
ISSN	1001-9332
出版年	2015
卷号	26 期号:1 页码:61-66
中文摘要	在我国东北西部半干旱风沙区,春季玉米幼苗经常受到大风和风沙流危害.为了解风沙流危害下玉米幼苗的逆境生理特征,2013年在内蒙古东部科尔沁沙地研究了0(CK)、6、9、12、15和18 m?s~(-1)等6个风速(风沙流强度分别为0、1.00、28.30、63.28、111.82和172.93g?cm~(-1)?min~(-1))10 min吹袭下幼苗丙二醛含量、膜透性、保护酶活性和渗透调节物质含量的变化.结果表明:6~12 m?s~(-1)的风沙流吹袭对玉米幼苗叶片含水量影响较小,而15和18m?s~(-1)的风沙流吹袭导致其叶片相对含水量分别下降19.0%和18.7%.随着风沙流吹袭强度的增大,其丙二醛含量趋于下降,15和18 m?s~(-1)处理分别较CK下降35.0%和39.0%;而膜透性大幅度增加,15和18 m?s~(-1)处理分别较CK增加191.3%和187.8%;SOD活性降低,CAT反应不敏感,POD活性显著增强.对于风沙流造成的轻度水分胁迫,其可溶性糖和脯氨酸均未发挥渗透调节作用,但在15和18 m?s~(-1)强风沙流吹袭下其脯氨酸含量分别增加11.4%和24.5%,起到了渗透调节作用.
英文摘要	Corn seedlings are often harmed by strong wind-sand in the spring in semi-arid windsand area of west of Northeast China. In order to understand physiological response mechanisms of the corn seedlings to wind-sand damage,the changes in MDA content,membrane permeability, protective enzymes activities and osmotic regulation substances at 0 (CK),6,9,12,15 and 18 m?s~(-1) wind speed (wind-sand flow strength: 0,1. 00,28. 30,63. 28,111. 82 and 172. 93 g?cm~(-1)?min~(-1),respectively) for 10 min duration were studied during the spring,2013 in the Horqin Sand Land of Inner Mongolia. The results showed that effects of wind-sand flow blowing on the RWC of the corn seedling were lighter in the 6-12 m?s~(-1) treatments,but the RWC decreased by 19. 0% and 18. 7% in the 15 m?s~(-1) and 18 m?s~(-1) treatments compared to the CK,respectively. The MDA content tended to decline with increasing the wind-sand flow strength,and decreased by 35. 0% and 39. 0% in the 15 m?s~(-1) and 18 m?s~(-1) treatments compared to the CK,respectively. The membrane permeability increased significantly with increasing the wind-sand flow strength,and increased by 191. 3% and 187. 8% in the 15 m?s~(-1) and 18 m?s~(-1) treatments compared to the CK,respectively. With the increase of wind-sand flow strength,SOD activities decreased and changes of CAT activities were not significant,only POD activities increased significantly, which played an important role in the process of scavenging reactive oxygen species and protecting cell membrane against damage. For lighter water stress caused by wind-sand flow blowing, proline and soluble sugar did not play any role in osmotic adjustment,but the proline content increased by 11. 4% and 24. 5% in the 15 m?s~(-1) and 18 m?s~(-1) treatments compared to the CK, respectively,which played an important role in osmotic adjustment.
中文关键词	玉米幼苗 ; 风沙流 ; 膜透性 ; 保护酶 ; 渗透调节
英文关键词	corn seedling wind-sand flow membrane permeability protective enzymes osmotic regulation
语种	中文
国家	中国
收录类别	CSCD
WOS类目	PLANT SCIENCES
WOS研究方向	Plant Sciences
CSCD记录号	CSCD:5336000
来源机构	中国科学院西北生态环境资源研究院
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/233568
作者单位	1.中国科学院寒区旱区环境与工程研究所, 兰州, 甘肃 730000, 中国; 2.鲁东大学生命科学学院, 烟台, 山东 264025, 中国
推荐引用方式 GB/T 7714	赵哈林,李瑾,周瑞莲,等. 玉米幼苗对风沙流强度变化的生理响应[J]. 中国科学院西北生态环境资源研究院,2015,26(1):61-66.
APA	赵哈林,李瑾,周瑞莲,曲浩,云建英,&潘成臣.(2015).玉米幼苗对风沙流强度变化的生理响应.应用生态学报,26(1),61-66.
MLA	赵哈林,et al."玉米幼苗对风沙流强度变化的生理响应".应用生态学报 26.1(2015):61-66.