干旱区生态环境知识资源中心(Arid): 菌根桑苗在石漠化和消落带地区逆境胁迫下的生态适应性

Arid

	菌根桑苗在石漠化和消落带地区逆境胁迫下的生态适应性
其他题名	Ecological Adaptability of Mulberry Saplings Inoculated with Gigaspora rosea Under Stress Conditions in Rocky Desertification Areas and Riparian Zones
	曹敏 1; 余米 2; 卢敏 1; 蒋圆圆 1; 黄先智 3; 杨晓红 1
来源期刊	蚕业科学
ISSN	0257-4799
出版年	2017
卷号	43 期号:2 页码:189-195
中文摘要	丛枝菌根真菌(arbuscular mycorrhizal,AMF)是土壤中广泛存在的一种真菌,能侵染大多数植物根系与之形成共生的丛枝菌根(AM)。将长势基本一致的接种了AMF(玫瑰红巨孢囊霉Gigaspora rosea)的菌根桑苗以及未接种AMF的桑苗同时移栽到位于我国西南部的石漠化和消落带地区,并连续2年进行追踪调查,探索菌根桑苗对石漠化和消落带地区旱涝逆境胁迫的生态适应性,以及对2类逆境生态的修复重建潜能。调查结果表明:在2类生态环境下,菌根桑苗的菌根侵染率均为未接种AMF桑苗的1.5倍以上;菌根桑苗的最大枝条长度、茎基粗、第5位叶长等农艺性状均显著优于对照组桑苗,营养生长对菌根的依赖性都>100%;菌根桑苗叶片的叶绿素含量、渗透调节物质(脯氨酸、可溶性糖、可溶性蛋白)含量和保护酶(超氧化物歧化酶、过氧化物酶、过氧化氢酶)活性都显著高于对照组桑苗。上述结果提示:桑苗根系与AMF共生形成的丛枝菌根通过提高桑叶中的渗透调节物质含量和保护酶活性,增强了桑苗对旱、涝胁迫环境的耐受性,通过提高叶绿素含量促进了桑苗的营养生长。菌根桑生物技术的应用,可显著促进西南喀斯特石漠化地区和三峡库区消落带地区的生态修复与生态重建。
英文摘要	Arbuscular mycorrhizal fungi (AMF) are a kind of fungus widely distributed in soil. They can infect most plant roots and form symbiotic association-arbuscular mycorrhizae. In order to explore ecological adaptability and reconstruction potential of mycorrhizal mulberry under drought and flood stress conditions in rocky desertification areas and riparian zones, mulberry saplings inoculated with Gigaspora rosea and the non-inoculated ones of consistent growth were transplanted into the rocky desertification areas and hydro-fluctuation belts in the southwest of China. The investigation on ecological adaptability and agronomic phenotype of mulberry saplings were carried continuously for 2 years. The results showed that the colonization rate of inoculated mulberry saplings was 1.5 times higher than that of non-inoculated ones. Agronomic phenotypes such as maximum length of branches, stem diameter, and length of the 5th leaf of inoculated mulberry samplings were all superior to those of non-inoculated ones. And the mycorrhizal dependency (MD) of vegetative growth was all over 100%. In addition, the contents of chlorophyll and osmosis substances (proline, soluble sugar and soluble protein), and the leaf protective enzyme (SOD, POD and CAT) activity were significantly higher than those of contrasts. The above results showed that AM fungi improved the tolerance of mulberry saplings to drought and waterlogging stress by increasing the osmotic adjustment substance content and the protective enzyme activity in mulberry leaves, and promoted the vegetative growth of mulberry seedlings by increasing chlorophyll content. Therefore, the application of mycorrhizal mulberry biotechnology is an important measure to promote ecological restoration and reconstruction of rocky desertification areas of southwest Karst area and riparian zones of the Three Gorges Reservoir.
中文关键词	丛枝菌根真菌 ; 桑 ; 石漠化 ; 消落带 ; 农艺性状 ; 生理特性
英文关键词	Arbuscular mycorrhizal fungi Morus L. Rocky desertification Hydro-fluctuation belt Agronomic character Physiological character
语种	中文
国家	中国
收录类别	CSCD
WOS类目	AGRICULTURE MULTIDISCIPLINARY
WOS研究方向	Agriculture
CSCD记录号	CSCD:5963949
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/235627
作者单位	1.西南大学园艺园林学院, 南方山地园艺学教育部重点实验室, 重庆 400715, 中国; 2.重庆市药物种植研究所, 重庆 408435, 中国; 3.西南大学蚕学与系统生物学研究所, 重庆 400715, 中国
推荐引用方式 GB/T 7714	曹敏,余米,卢敏,等. 菌根桑苗在石漠化和消落带地区逆境胁迫下的生态适应性[J],2017,43(2):189-195.
APA	曹敏,余米,卢敏,蒋圆圆,黄先智,&杨晓红.(2017).菌根桑苗在石漠化和消落带地区逆境胁迫下的生态适应性.蚕业科学,43(2),189-195.
MLA	曹敏,et al."菌根桑苗在石漠化和消落带地区逆境胁迫下的生态适应性".蚕业科学 43.2(2017):189-195.