Salt-Tolerant Bioenergy Crops For Improving Productivity of Marginal Lands

Sun, Youping; Niu, Genhua; Peiwang, LI; Masabni, Joe

doi:10.1201/9781315204307-12

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“…where EPi is the emergence percentage on day i, and Ti is the number of days after sowing [33]. EP and EI data were analyzed as described in Expt.…”

Section: Seedling Emergence (Expt 2)mentioning

confidence: 99%

“…NS, *, **, ***: not significant, significant at p < 0.05, 0.01, and 0.001, respectively. ‡ Adapted from Sun et al [33] Potassium plays an important role in the tugor-pressure-driven solute transport in the xylem and the water balance of plants [37]. Na + accumulation might cause the reduction of K + uptake [38].…”

Section: Seedling Growth (Expt 1)mentioning

confidence: 99%

“…These results are in line with a previous study on sorghum [34], which decreased its seedling emergence under saline solution conditions. ‡ Adapted from Sun et al [33] The dendrogram and cluster of six switchgrass cultivars were obtained based on the Ward linkage method and squared Euclidian distance on the means of the salt tolerance indices for four multivariate parameters at seedling growth and emergence stages (Figure 1). 'Alamo' and 'NSL 2009-2' switchgrasses were consistently clustered as the most tolerant and the least tolerant cultivars, respectively, at both seedling growth and emergence stages.…”

Section: Seedling Emergence (Expt 2)mentioning

confidence: 99%

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Salt Tolerance of Six Switchgrass Cultivars

et al. 2018

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') were evaluated for salt tolerance in two separate greenhouse experiments. In experiment (Expt.) 1, switchgrass seedlings were irrigated with a nutrient solution at an electrical conductivity (EC) of 1.2 dS•m −1 (control) or a saline solution (spiked with salts) at an EC of 5.0 dS•m −1 (EC 5) or 10.0 dS•m −1 (EC 10) for four weeks, once a week. Treatment EC 10 reduced the tiller number by 32% to 37% for all switchgrass cultivars except 'Kanlow'. All switchgrass cultivars under EC 10 had a significant reduction of 50% to 63% in dry weight. In Expt. 2, switchgrass was seeded in substrates moistened with either a nutrient solution of EC 1.2 dS•m −1 (control) or a saline solution of EC of 5.0, 10.0, or 20.0 dS•m −1 (EC 5, EC 10, or EC 20). Treatment EC 5 did not affect the seedling emergence, regardless of cultivar. Compared to the control, EC 10 reduced the seedling emergence of switchgrass 'Alamo', 'Cimarron', and 'NL 94C2-3' by 44%, 33%, and 82%, respectively. All switchgrass cultivars under EC 10 had a 46% to 88% reduction in the seedling emergence index except 'NSL 2009-2'. No switchgrass seedlings emerged under EC 20. In summary, high salinity negatively affected switchgrass seedling emergence and growth. Dendrogram and cluster of six switchgrass cultivars indicated that 'Alamo' was the most tolerant cultivar, while 'NSL 2009-2' was the least tolerant cultivar at both seedling emergence and growth stages. A growth-stage dependent response to salinity was observed for the remaining switchgrass cultivars. 'NSL 2009-1' and 'NL 94C2-3' were more tolerant to salinity than 'Cimarron' and 'Kanlow' at the seedling emergence stage; however, 'Kanlow' and 'Cimarron' were more tolerant to salinity than 'NSL 2009-1' and 'NL 94C2-3' at the seedling growth stage.

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“…where EPi is the emergence percentage on day i, and Ti is the number of days after sowing [33]. EP and EI data were analyzed as described in Expt.…”

Section: Seedling Emergence (Expt 2)mentioning

confidence: 99%

Section: Seedling Growth (Expt 1)mentioning

confidence: 99%