Salt Tolerance of <i>Hydrangea</i> Plants Varied among Species and Cultivar within a Species
A greenhouse study was conducted to assess the relative salt tolerance of 11 cultivars of hydrangea: <i>Hydrangea macrophylla</i> ‘Ayesha’, ‘Emotion’, ‘Mathilda Gutges’, ‘Merritt’s Supreme’ and ‘Passion’; <i>H</i>. <i>paniculata</i> ‘Interhydia’ and ‘Bulk’; <i&...
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MDPI AG
2020-09-01
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| Series: | Horticulturae |
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| Online Access: | https://www.mdpi.com/2311-7524/6/3/54 |
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| author | Genhua Niu Youping Sun Triston Hooks James Altland Haijie Dou Christina Perez |
| author_facet | Genhua Niu Youping Sun Triston Hooks James Altland Haijie Dou Christina Perez |
| author_sort | Genhua Niu |
| collection | DOAJ |
| description | A greenhouse study was conducted to assess the relative salt tolerance of 11 cultivars of hydrangea: <i>Hydrangea macrophylla</i> ‘Ayesha’, ‘Emotion’, ‘Mathilda Gutges’, ‘Merritt’s Supreme’ and ‘Passion’; <i>H</i>. <i>paniculata</i> ‘Interhydia’ and ‘Bulk’; <i>H</i>. <i>quercifolia</i> ‘Snowflake’; <i>H</i>. <i>serrata</i> ‘Preciosa’; and <i>H</i>. <i>serrata × macrophylla</i> ‘Sabrina’ and ‘Selina’. Plants were treated with a nutrient solution at an electrical conductivity (EC) of 1.0 dS·m<sup>−1</sup>, and nutrient solution-based saline solutions at an EC of 5.0 dS·m<sup>−1</sup> (EC 5) or 10 dS·m<sup>−1</sup> (EC 10). The study was repeated in time (Experiments 1 and 2). In both experiments, by the fourth week after treatment, ‘Bulk’ plants in EC 10 exhibited severe salt damage with most of them dead. ‘Interhydia’ was also sensitive, showing severe salt damage in EC 10 with a high mortality rate by the end of the experiment. The leaf area and total shoot dry weight (DW) of all cultivars in EC 5 and EC 10 treatments were significantly reduced compared to the control. Leaf sodium (Na<sup>+</sup>) and chloride (Cl<sup>−</sup>) concentrations were negatively correlated with visual quality, leaf area and shoot DW. The salt-sensitive cultivars ‘Bulk’, ‘Interhydia’ and ‘Snowflake’ had inherently low leaf Na<sup>+</sup> and Cl<sup>−</sup> concentrations in both control and salt-treated plants compared to other cultivars. Salt tolerance varied among species and cultivars within <i>H. macrophylla</i>. Among the 11 cultivars, <i>H. macrophylla</i> ‘Ayesha’ and two hybrids, ‘Sabrina’ and ‘Selina’, were relatively salt-tolerant. <i>H. macrophylla</i> ‘Merritt’s Supreme’ and ‘Mathilda’ were moderately tolerant. <i>H. paniculata</i> ‘Bulk’ was the most sensitive, followed by <i>H. paniculata</i> ‘Interhydia’, and then by <i>H. serrata</i> ‘Preciosa’ and <i>H. macrophylla</i> ‘Passion’, as evidenced by high mortality and severe salt damage symptoms. <i>H. quercifolia</i> ‘Snowflake’ and <i>H. macrophylla</i> ‘Emotion’ were moderately salt-sensitive. |
| first_indexed | 2024-03-10T16:35:20Z |
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| spelling | doaj.art-e78782c82cc24628b9038392a956655b2023-11-20T12:34:33ZengMDPI AGHorticulturae2311-75242020-09-01635410.3390/horticulturae6030054Salt Tolerance of <i>Hydrangea</i> Plants Varied among Species and Cultivar within a SpeciesGenhua Niu0Youping Sun1Triston Hooks2James Altland3Haijie Dou4Christina Perez5Texas A&M AgriLife Research, Texas A&M University, Dallas, TX 75252, USADepartment of Plants, Soils, and Climate, Utah State University, Logan, UT 84322, USATexas A&M AgriLife Research, Texas A&M University, Dallas, TX 75252, USAUSDA-ARS, Wooster, OH 44691, USATexas A&M AgriLife Research, Texas A&M University, Dallas, TX 75252, USATexas A&M AgriLife Research, Texas A&M University, Dallas, TX 75252, USAA greenhouse study was conducted to assess the relative salt tolerance of 11 cultivars of hydrangea: <i>Hydrangea macrophylla</i> ‘Ayesha’, ‘Emotion’, ‘Mathilda Gutges’, ‘Merritt’s Supreme’ and ‘Passion’; <i>H</i>. <i>paniculata</i> ‘Interhydia’ and ‘Bulk’; <i>H</i>. <i>quercifolia</i> ‘Snowflake’; <i>H</i>. <i>serrata</i> ‘Preciosa’; and <i>H</i>. <i>serrata × macrophylla</i> ‘Sabrina’ and ‘Selina’. Plants were treated with a nutrient solution at an electrical conductivity (EC) of 1.0 dS·m<sup>−1</sup>, and nutrient solution-based saline solutions at an EC of 5.0 dS·m<sup>−1</sup> (EC 5) or 10 dS·m<sup>−1</sup> (EC 10). The study was repeated in time (Experiments 1 and 2). In both experiments, by the fourth week after treatment, ‘Bulk’ plants in EC 10 exhibited severe salt damage with most of them dead. ‘Interhydia’ was also sensitive, showing severe salt damage in EC 10 with a high mortality rate by the end of the experiment. The leaf area and total shoot dry weight (DW) of all cultivars in EC 5 and EC 10 treatments were significantly reduced compared to the control. Leaf sodium (Na<sup>+</sup>) and chloride (Cl<sup>−</sup>) concentrations were negatively correlated with visual quality, leaf area and shoot DW. The salt-sensitive cultivars ‘Bulk’, ‘Interhydia’ and ‘Snowflake’ had inherently low leaf Na<sup>+</sup> and Cl<sup>−</sup> concentrations in both control and salt-treated plants compared to other cultivars. Salt tolerance varied among species and cultivars within <i>H. macrophylla</i>. Among the 11 cultivars, <i>H. macrophylla</i> ‘Ayesha’ and two hybrids, ‘Sabrina’ and ‘Selina’, were relatively salt-tolerant. <i>H. macrophylla</i> ‘Merritt’s Supreme’ and ‘Mathilda’ were moderately tolerant. <i>H. paniculata</i> ‘Bulk’ was the most sensitive, followed by <i>H. paniculata</i> ‘Interhydia’, and then by <i>H. serrata</i> ‘Preciosa’ and <i>H. macrophylla</i> ‘Passion’, as evidenced by high mortality and severe salt damage symptoms. <i>H. quercifolia</i> ‘Snowflake’ and <i>H. macrophylla</i> ‘Emotion’ were moderately salt-sensitive.https://www.mdpi.com/2311-7524/6/3/54nursery cropsornamentalssaline water irrigationsalt tolerance mechanism |
| spellingShingle | Genhua Niu Youping Sun Triston Hooks James Altland Haijie Dou Christina Perez Salt Tolerance of <i>Hydrangea</i> Plants Varied among Species and Cultivar within a Species Horticulturae nursery crops ornamentals saline water irrigation salt tolerance mechanism |
| title | Salt Tolerance of <i>Hydrangea</i> Plants Varied among Species and Cultivar within a Species |
| title_full | Salt Tolerance of <i>Hydrangea</i> Plants Varied among Species and Cultivar within a Species |
| title_fullStr | Salt Tolerance of <i>Hydrangea</i> Plants Varied among Species and Cultivar within a Species |
| title_full_unstemmed | Salt Tolerance of <i>Hydrangea</i> Plants Varied among Species and Cultivar within a Species |
| title_short | Salt Tolerance of <i>Hydrangea</i> Plants Varied among Species and Cultivar within a Species |
| title_sort | salt tolerance of i hydrangea i plants varied among species and cultivar within a species |
| topic | nursery crops ornamentals saline water irrigation salt tolerance mechanism |
| url | https://www.mdpi.com/2311-7524/6/3/54 |
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