干旱区生态环境知识资源中心(Arid): Effects of Arbuscular Mycorrhizal Fungi on Growth and Physiological Performance of Catalpa bungei CAMey. under Drought Stress

Arid

DOI	10.3390/f11101117
	Effects of Arbuscular Mycorrhizal Fungi on Growth and Physiological Performance of Catalpa bungei CAMey. under Drought Stress
	Chen, Wei; Meng, Panpan; Feng, Huan; Wang, Chunyan
通讯作者	Wang, CY
来源期刊	FORESTS
EISSN	1999-4907
出版年	2020
卷号	11 期号:10
英文摘要	Catalpa bungei C.A.Mey. is a common ornamental timber species. Its survival and growth are greatly affected by water scarcity in arid and semi-arid areas of Northwest China. Evidence suggests arbuscular mycorrhizal fungus (AMF) may improve plant drought resistance. However, there is limited information on the systematic effects of AMF on drought resistance in C. bungei seedlings. Here, a pot experiment was used to explore the effects of inoculation with the AMF Rhizophagus intraradices on the growth and physiological performance of C. bungei under different water treatment conditions. Three water levels and two mycorrhizal inoculation treatments were used with factorial design. The results showed that drought stress noticeably affected the growth and physiological performance of C. bungei seedlings. However, inoculation with R. intraradices significantly ameliorated the growth, and alleviated the effects of drought stress. The growth parameters of AMF-inoculated seedlings significantly increased regardless of water status. AMF changed the biomass allocation in seedlings by reducing the root mass ratio (RMR) and root/shoot ratio. AMF-inoculated seedlings displayed higher gas exchange parameters, photosynthetic pigment concentrations, specific leaf area (SLA), but lower specific leaf weight (SLW), regardless of water status. AMF alleviated drought-induced oxidative stress by attenuating the excess generation of reactive oxygen species (ROS), especially H2O2 and O-2(-), in leaves. Inoculation with AMF under drought stress also dramatically augmented indole-3-acetic acid (IAA) and gibberellins (GA(3)) levels and the IAA/abscisic acid (ABA) and GA(3)/ABA ratios, but reduced ABA and zeatin (ZT) levels in leaves. AMF symbiosis improved root morphology and promoted the absorption of nitrogen (N) and phosphorus (P) in seedlings. We conclude that inoculation with R. intraradices is potentially useful for afforestation and cultivation of C. bungei in Northwest China. Furthermore, AMF improved soil structure by increasing the glomalin-related soil protein (GRSP) contents and the proportion of macro-aggregates (0.25-0.5 mm) in the rhizosphere soil.
英文关键词	Rhizophagus intraradices Catalpa bungei growth parameters physiological performance root morphology soil aggregates drought stress
类型	Article
语种	英语
开放获取类型	gold
收录类别	SCI-E
WOS记录号	WOS:000586168200001
WOS关键词	REACTIVE OXYGEN-METABOLISM ; LEAF WATER STATUS ; PLANT-GROWTH ; TRANSCRIPTIONAL RESPONSES ; ANTIOXIDANT ACTIVITY ; ROOT MORPHOLOGY ; ABSCISIC-ACID ; AM FUNGI ; TOLERANCE ; INOCULATION
WOS类目	Forestry
WOS研究方向	Forestry
来源机构	西北农林科技大学
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/327327
作者单位	[Chen, Wei; Meng, Panpan; Feng, Huan; Wang, Chunyan] Northwest A&F Univ, Coll Forestry, Yangling 712100, Shaanxi, Peoples R China
推荐引用方式 GB/T 7714	Chen, Wei,Meng, Panpan,Feng, Huan,et al. Effects of Arbuscular Mycorrhizal Fungi on Growth and Physiological Performance of Catalpa bungei CAMey. under Drought Stress[J]. 西北农林科技大学,2020,11(10).
APA	Chen, Wei,Meng, Panpan,Feng, Huan,&Wang, Chunyan.(2020).Effects of Arbuscular Mycorrhizal Fungi on Growth and Physiological Performance of Catalpa bungei CAMey. under Drought Stress.FORESTS,11(10).
MLA	Chen, Wei,et al."Effects of Arbuscular Mycorrhizal Fungi on Growth and Physiological Performance of Catalpa bungei CAMey. under Drought Stress".FORESTS 11.10(2020).