Gas Exchange, Water Use Efficiency, and Biomass Partitioning among Geographic Sources of <i>Acer saccharum</i> Subsp. <i>saccharum</i> and Subsp. <i>nigrum</i> Seedlings in Response to Water Stress
Responses to water stress were measured for sugar maple (<i>Acer saccharum</i> subsp. <i>saccharum</i> Marshall) sources from Oklahoma (Caddo sugar maple), Missouri, Tennessee, Ontario, and a black maple (<i>Acer saccharum</i> subsp. <i>nigrum</i> F. M...
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| Format: | Article |
| Language: | English |
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MDPI AG
2021-04-01
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| Series: | Plants |
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| Online Access: | https://www.mdpi.com/2223-7747/10/4/742 |
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| author | Richard J. Hauer Hongxu Wei Andrew K. Koeser Jeffrey O. Dawson |
| author_facet | Richard J. Hauer Hongxu Wei Andrew K. Koeser Jeffrey O. Dawson |
| author_sort | Richard J. Hauer |
| collection | DOAJ |
| description | Responses to water stress were measured for sugar maple (<i>Acer saccharum</i> subsp. <i>saccharum</i> Marshall) sources from Oklahoma (Caddo sugar maple), Missouri, Tennessee, Ontario, and a black maple (<i>Acer saccharum</i> subsp. <i>nigrum</i> F. Michx.) source from Iowa. Seedling sources were selected for differences in temperature and precipitation of their geographic origins. Seedlings were preconditioned through moist (watered daily) or dry (watered every 4–7 days) cycles and then exposed to prolonged water stress. As water stress increased, dry preconditioned 17-week-old sugar maple seedlings from Oklahoma, Missouri, and Tennessee, sources from warmer, and/or drier climates with greater restrained photosynthesis, stomatal conductance, and water use efficiency than those from cooler and moister climates. Under imposed water stress, the Ontario and Iowa sourced seedlings increased their root to shoot ratios and decreased their specific leaf area, mechanisms for drought avoidance. However, no corresponding changes in these values occurred for Oklahoma, Missouri, and Tennessee sources and for the variable of leaf wilting across all sources. Results from this study suggest greater tolerance of water stress in the Oklahoma, Missouri, and Tennessee ecotypes from the western and southern range of sugar maple resulted primarily with water use efficiency (WUE) rather than other water stress coping mechanisms. Findings from this study provide evidence to support selection of sugar maples sources for forestation. |
| first_indexed | 2024-03-10T12:26:47Z |
| format | Article |
| id | doaj.art-2bff7d95111b46f3898b3a65d6d245ca |
| institution | Directory Open Access Journal |
| issn | 2223-7747 |
| language | English |
| last_indexed | 2024-03-10T12:26:47Z |
| publishDate | 2021-04-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Plants |
| spelling | doaj.art-2bff7d95111b46f3898b3a65d6d245ca2023-11-21T14:59:19ZengMDPI AGPlants2223-77472021-04-0110474210.3390/plants10040742Gas Exchange, Water Use Efficiency, and Biomass Partitioning among Geographic Sources of <i>Acer saccharum</i> Subsp. <i>saccharum</i> and Subsp. <i>nigrum</i> Seedlings in Response to Water StressRichard J. Hauer0Hongxu Wei1Andrew K. Koeser2Jeffrey O. Dawson3College of Natural Resources, University of Wisconsin-Stevens Point, Stevens Point, WI 54481, USANortheast Institute of Geography and Agroecology, Chinese Academy of Sciences, Changchun 130102, ChinaGulf Coast Research and Education Center, University of Florida, 14625 CR 672, Wimauma, FL 33598, USADepartment of Natural Resources and Environmental Sciences, University of Illinois at Urbana/Champaign, Urbana, IL 61801, USAResponses to water stress were measured for sugar maple (<i>Acer saccharum</i> subsp. <i>saccharum</i> Marshall) sources from Oklahoma (Caddo sugar maple), Missouri, Tennessee, Ontario, and a black maple (<i>Acer saccharum</i> subsp. <i>nigrum</i> F. Michx.) source from Iowa. Seedling sources were selected for differences in temperature and precipitation of their geographic origins. Seedlings were preconditioned through moist (watered daily) or dry (watered every 4–7 days) cycles and then exposed to prolonged water stress. As water stress increased, dry preconditioned 17-week-old sugar maple seedlings from Oklahoma, Missouri, and Tennessee, sources from warmer, and/or drier climates with greater restrained photosynthesis, stomatal conductance, and water use efficiency than those from cooler and moister climates. Under imposed water stress, the Ontario and Iowa sourced seedlings increased their root to shoot ratios and decreased their specific leaf area, mechanisms for drought avoidance. However, no corresponding changes in these values occurred for Oklahoma, Missouri, and Tennessee sources and for the variable of leaf wilting across all sources. Results from this study suggest greater tolerance of water stress in the Oklahoma, Missouri, and Tennessee ecotypes from the western and southern range of sugar maple resulted primarily with water use efficiency (WUE) rather than other water stress coping mechanisms. Findings from this study provide evidence to support selection of sugar maples sources for forestation.https://www.mdpi.com/2223-7747/10/4/742abiotic stressforestryplant selectiontree physiologyurban forestry |
| spellingShingle | Richard J. Hauer Hongxu Wei Andrew K. Koeser Jeffrey O. Dawson Gas Exchange, Water Use Efficiency, and Biomass Partitioning among Geographic Sources of <i>Acer saccharum</i> Subsp. <i>saccharum</i> and Subsp. <i>nigrum</i> Seedlings in Response to Water Stress Plants abiotic stress forestry plant selection tree physiology urban forestry |
| title | Gas Exchange, Water Use Efficiency, and Biomass Partitioning among Geographic Sources of <i>Acer saccharum</i> Subsp. <i>saccharum</i> and Subsp. <i>nigrum</i> Seedlings in Response to Water Stress |
| title_full | Gas Exchange, Water Use Efficiency, and Biomass Partitioning among Geographic Sources of <i>Acer saccharum</i> Subsp. <i>saccharum</i> and Subsp. <i>nigrum</i> Seedlings in Response to Water Stress |
| title_fullStr | Gas Exchange, Water Use Efficiency, and Biomass Partitioning among Geographic Sources of <i>Acer saccharum</i> Subsp. <i>saccharum</i> and Subsp. <i>nigrum</i> Seedlings in Response to Water Stress |
| title_full_unstemmed | Gas Exchange, Water Use Efficiency, and Biomass Partitioning among Geographic Sources of <i>Acer saccharum</i> Subsp. <i>saccharum</i> and Subsp. <i>nigrum</i> Seedlings in Response to Water Stress |
| title_short | Gas Exchange, Water Use Efficiency, and Biomass Partitioning among Geographic Sources of <i>Acer saccharum</i> Subsp. <i>saccharum</i> and Subsp. <i>nigrum</i> Seedlings in Response to Water Stress |
| title_sort | gas exchange water use efficiency and biomass partitioning among geographic sources of i acer saccharum i subsp i saccharum i and subsp i nigrum i seedlings in response to water stress |
| topic | abiotic stress forestry plant selection tree physiology urban forestry |
| url | https://www.mdpi.com/2223-7747/10/4/742 |
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