Abstract
Saline soils spread wildly in the world, therefore it is important to develop salt-tolerant crops. We carried out a pot study in order to determine effects of arbuscular mycorrhizal fungi (AMF) (Rhizophagus irregularis and Glomus versiforme) in black locust seedlings under salt (NaCl) stress. The results showed that AMF enhanced in seedlings their growth, photosynthetic ability, carbon content, and calorific value. Under salt stress, the biomass of the seedlings with R. irregularis or G. versiforme were greater by 151 and 100%, respectively, while a leaf area increased by 197 and 151%, respectively. The seedlings colonized by R. irregularis exhibited a higher chlorophyll content, net photosynthetic rate, intercellular CO2 concentration, stomatal conductance, and transpiration rate than that of the nonmycorrhizal seedlings or those colonized by G. versiforme. Both R. irregularis and G. versiforme significantly enhanced a carbon content, calorific value, carbon, and energy accumulations of black locust under conditions of 0 or 1.5 g(NaCl) kg–1(growth substrate). Our results suggested that AMF alleviated salt stress and improved the growth of black locust.
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Abbreviations
- AMF:
-
arbuscular mycorrhizal fungi
- CE:
-
carboxylation efficiency
- Chl:
-
chlorophyll
- C i :
-
intercellular CO2 concentration
- E :
-
transpiration rate
- g s :
-
stomatal conductance
- LA:
-
leaf area
- LDM:
-
leaf dry mass
- LSA:
-
leaf special area
- NM:
-
nonmycorrhizal
- NS:
-
not salt-stressed
- P N :
-
net photosynthetic rate
- S:
-
salt stress
- WUEi :
-
intrinsic water-use efficiency
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Acknowledgments: This research was supported by Special Fund for Forest Scientific Research in the Public Welfare (201404217), the National Natural Science Foundation of China (31270639, 31170567), the Program for Changjiang Scholars and Innovative Research Team in University of China (IRT1035), the General Financial Grand from the China Postdoctoral Science Foundation (2016M592849), and Natural Science Foundation of Henan Province (142102110185).
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Zhu, X.Q., Tang, M. & Zhang, H.Q. Arbuscular mycorrhizal fungi enhanced the growth, photosynthesis, and calorific value of black locust under salt stress. Photosynthetica 55, 378–385 (2017). https://doi.org/10.1007/s11099-017-0662-y
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DOI: https://doi.org/10.1007/s11099-017-0662-y