NDLI: Evaluation of Salinity Tolerance and Genetic Diversity of Thirty-Three Switchgrass (Panicum virgatum) Populations

Content Provider	Springer Nature Link
Author	Liu, Yiming Zhang, Xunzhong Miao, Jiamin Huang, Linkai Frazier, Taylor Zhao, Bingyu
Copyright Year	2014
Abstract	Switchgrass (Panicum virgatum) is a warm-season C$_{4}$ grass that is a target lignocellulosic biofuel species. Salt stress is one of the major limiting factors for switchgrass growth in many regions. The objective of this study was to examine relative salt tolerance and genetic diversity among 33 switchgrass populations. Seeds of each population were planted in cone-tainers and grown in a greenhouse. Two months after establishment, the switchgrass were grown in half strength Hoagland’s nutrient solution with either 0 mM NaCl (control) or half strength Hoagland’s nutrient solution with 250 mM NaCl (salt stress treatment) for 24 days. Salt stress tolerance was determined based on a variety of parameters including leaf electrolyte leakage (EL), chlorophyll content (Chl content), leaf photochemical efficiency (F $_{v}$/F $_{m}$), photosynthetic rate (P $_{n}$), stomatal conductance (g $_{s}$), and transpiration rate (T $_{r}$). Significant differences in salt stress tolerance were found among the 33 populations. Based on the P $_{n}$ and salt tolerance trait index (STTI), lowland populations AM-314/MS-155, Kanlow, TEM-LoDorm, Alamo, and BN-13645-64, as well as upland populations T-2086, T-2101, BN-11357-63, and BN-12323-69 were classified as salt tolerant. In contrast, upland populations BN-18757-67, 70SG0021, Summer, 70SG0016, T16971, Dacotah, Turkey, 70SG003, and Pathfinder were classified as salt sensitive populations. Sequence-related amplified polymorphism (SRAP) marker analysis was employed to determine the genetic diversity among the 33 switchgrass populations. UPGMA cluster analysis showed that salt tolerant switchgrass populations TEM-LoDorm, Alamo, Kanlow, BN-12323-69, AM-314/MS-155, T2101, BN-11357-63, T-2086, and BN-13645-64 clustered into one group, indicating that these salt tolerant populations may have a similar genetic background.
Starting Page	1329
Ending Page	1342
Page Count	14
File Format	PDF
ISSN	19391234
Journal	BioEnergy Research
Volume Number	7
Issue Number	4
e-ISSN	19391242
Language	English
Publisher	Springer US
Publisher Date	2014-05-17
Publisher Place	Boston
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	Switchgrass Panicum virgatum Salt tolerance SRAP marker Genetic diversity Plant Sciences Plant Genetics & Genomics Plant Breeding/Biotechnology Plant Ecology Wood Science & Technology
Content Type	Text
Resource Type	Article
Subject	Renewable Energy, Sustainability and the Environment Agronomy and Crop Science

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