干旱区生态环境知识资源中心(Arid): Arbuscular mycorrhizal fungi improve the growth and drought tolerance of Cinnamomum migao by enhancing physio-biochemical responses

Arid

DOI	10.1002/ece3.9091
	Arbuscular mycorrhizal fungi improve the growth and drought tolerance of Cinnamomum migao by enhancing physio-biochemical responses
	Yan, Qiuxiao; Li, Xiangying; Xiao, Xuefeng; Chen, Jingzhong; Liu, Jiming; Lin, Changhu; Guan, Ruiting; Wang, Daoping
通讯作者	Liu, JM
来源期刊	ECOLOGY AND EVOLUTION
ISSN	2045-7758
出版年	2022
卷号	12 期号:7
英文摘要	Drought is the main limiting factor for plant growth in karst areas with a fragile ecological environment. Cinnamomum migao H.W. Li is an endemic medicinal woody plant present in the karst areas of southwestern China, and it is endangered due to poor drought tolerance. Arbuscular mycorrhizal fungi (AMF) are known to enhance the drought tolerance of plants. However, few studies have examined the contribution of AMF in improving the drought tolerance of C. migao seedlings. Therefore, we conducted a series of experiments to determine whether a single inoculation and coinoculation of AMF (Claroideoglomus lamellosum and Claroideoglomus etunicatum) enhanced the drought tolerance of C. migao. Furthermore, we compared the effects of single inoculation and coinoculation with different inoculum sizes (20, 40, 60, and 100 g; four replicates per treatment) on mycorrhizal colonization rate, plant growth, photosynthetic parameters, antioxidant enzyme activity, and malondialdehyde (MDA) and osmoregulatory substance contents. The results showed that compared with nonmycorrhizal plants, AMF colonization significantly improved plant growing status; net photosynthetic rate; superoxide dismutase, catalase, and peroxidase activities; and soluble sugar, soluble protein, and proline contents. Furthermore, AMF colonization increased relative water content and reduced MDA content in cells. These combined cumulative effects of AMF symbiosis ultimately enhanced the drought tolerance of seedlings and were closely related to the inoculum size. With an increase in inoculum size, the growth rate and drought tolerance of plants first increased and then decreased. The damage caused by drought stress could be reduced by inoculating 40-60 g of AMF, and the effect of coinoculation was significantly better than that of single inoculation at 60 g of AMF, while the effect was opposite at 40 g of AMF. Additionally, the interaction between AMF and inoculum sizes had a significant effect on drought tolerance. In conclusion, the inoculation of the AMF (Cl. lamellosum and Cl. etunicatum) improved photosynthesis, activated antioxidant enzymes, regulated cell osmotic state, and enhanced the drought tolerance of C. migao, enabling its growth in fragile ecological environments.
英文关键词	antioxidant system arbuscular mycorrhizal fungi Cinnamomum migao drought stress osmotic adjustment photosynthesis plant growth
类型	Article
语种	英语
开放获取类型	Green Published, Green Submitted
收录类别	SCI-E
WOS记录号	WOS:000822899700001
WOS关键词	PLANT-GROWTH ; STRESS ; INOCULATION ; PHOTOSYNTHESIS ; DESERTIFICATION ; CULTIVARS ; SYMBIOSIS ; DISEASE ; SALT
WOS类目	Ecology ; Evolutionary Biology
WOS研究方向	Environmental Sciences & Ecology ; Evolutionary Biology
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/392380
推荐引用方式 GB/T 7714	Yan, Qiuxiao,Li, Xiangying,Xiao, Xuefeng,et al. Arbuscular mycorrhizal fungi improve the growth and drought tolerance of Cinnamomum migao by enhancing physio-biochemical responses[J],2022,12(7).
APA	Yan, Qiuxiao.,Li, Xiangying.,Xiao, Xuefeng.,Chen, Jingzhong.,Liu, Jiming.,...&Wang, Daoping.(2022).Arbuscular mycorrhizal fungi improve the growth and drought tolerance of Cinnamomum migao by enhancing physio-biochemical responses.ECOLOGY AND EVOLUTION,12(7).
MLA	Yan, Qiuxiao,et al."Arbuscular mycorrhizal fungi improve the growth and drought tolerance of Cinnamomum migao by enhancing physio-biochemical responses".ECOLOGY AND EVOLUTION 12.7(2022).