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Identifying Physiological Mechanisms and Winter Preparatory Management Strategies to Reduce Winterkill Losses in Grass Species
Identifying Physiological Mechanisms and Winter Preparatory Management Strategies to Reduce Winterkill Losses in Grass Species
상세정보
- 자료유형
- 학위논문 서양
- 최종처리일시
- 20260202103107
- ISBN
- 9798290940359
- DDC
- 630
- 서명/저자
- Identifying Physiological Mechanisms and Winter Preparatory Management Strategies to Reduce Winterkill Losses in Grass Species
- 발행사항
- [Sl] : Michigan State University, 2025
- 발행사항
- Ann Arbor : ProQuest Dissertations & Theses, 2025
- 형태사항
- 138 p
- 주기사항
- Source: Dissertations Abstracts International, Volume: 87-02, Section: B.
- 주기사항
- Advisor: Merewitz-Holm, Emily.
- 학위논문주기
- Thesis (Ph.D.)--Michigan State University, 2025.
- 초록/해제
- 요약Damaging winterkill stresses, such as ice encasement and waterlogging stresses, are expected to worsen with global climate change, damaging turfgrass species such as annual bluegrass (Poa annua) and crops like winter wheat (Triticum aestivum). Ice encasement can cause hypoxic or anoxic conditions that trap toxic gasses and metabolites, harming plant structures, growth, and yield. Fluctuating temperatures during winter can further exacerbate these issues by melting the ice, which is one of the leading causes of waterlogging. Managing these winterkill stressors is crucial for maintaining sustainable crop yields and playable field conditions. This dissertation investigates physiological mechanisms and winter management strategies for winter wheat and annual bluegrass. The first study assessed the impact of fall mowing height on spring recovery of annual bluegrass. Field plots in East Lansing, Michigan were mown at height of 3.17 mm (control), or gradually raised to maximum heights of 3.81, 4.44, and 5.08 mm. Field measurements, including normalized difference vegetative index (NDVI), leaf area index (LAI), and chlorophyll index (CHL), were taken during fall 2021/2022 and spring 2022/2023. These results indicated that NDVI, LAI, and CHL typically decreased throughout fall of both years and increased during the spring, with the 5.08 mm during fall of both years having highest NDVI, LAI, and CHL values across most sampling dates compared to the shorter mowing treatments. Higher mowing heights of 4.44 mm and 5.08 mm in the first year resulted in greater green cover percentage and faster recovery after ice encasement of either 0, 10, 20, or 40 days. Lastly, prolonged ice encasement durations decreased total nonstructural carbohydrates (TNC). In the second study, the effects of seeding depth of 0.5 inches (shallow) or 2.5 inches (deep) on photosynthesis during acclimation, oxidative damage (measured by lipid peroxidation), leaf area, biomass and yield after ice encasement stress of 0, 7, or 14 days was explored in two genotypes with contrasting coleoptile lengths: DynaGro with a longer coleoptile, and WhiteTail, with a shorter coleoptile. Shallow seeded plants resulted in consistently larger leaf area, less oxidative damage under prolonged durations of stress, and overall higher yields compared to the deeper seeded plants, and deeper seeded plants were more photosynthetically active during acclimation. The DynaGro genotype, with a longer coleoptile, resulted in larger biomass when compared to WhiteTail genotype, and tillers in both genotypes resulted in the highest biomass compared to spikes and roots. The third study analyzed photosynthetic performance and antioxidant levels in winter wheat after simulated overwintering of 0, 4, 10, or 20 days of surface ice encasement or winter desiccation. Photosynthetic parameters were measured using a dynamic environmental phenotypic imager (DEPI) chamber after respective durations of stress for four days during recovery, followed by antioxidant measurements. This resulted in finding that photosynthetic parameters such as ΦNPQ, qI, and qE helped distinguish between ice encasement and winter desiccation stress, with longer durations of stress leading to higher oxidative damage. The fourth study assessed the combined effects of ice encasement for 0, 7, 10, or 13 days, followed by 3 days of control or waterlogging on root length, leaf area, total and reproductive tiller production, and malondialdehyde (MDA) content in two genotypes with differing ice encasement tolerances: MSU and OSU. The combination of stresses reduced root length, leaf area, and increased MDA levels in leaf and root tissues of the winter wheat plants. MSU genotype produced a larger number of total tillers than OSU. Prolonged levels of ice encasement reduced reproductive tiller production during the first year, with 13 days causing the most damage to reproductive tiller production. This research improves our understanding of the effects of ice encasement on turfgrass and winter wheat growth.
- 일반주제명
- Agriculture
- 일반주제명
- Soil sciences
- 일반주제명
- Climate change
- 키워드
- Annual bluegrass
- 키워드
- Biomass
- 기타저자
- Michigan State University Crop and Soil Sciences- Doctor of Philosophy
- 기본자료저록
- Dissertations Abstracts International. 87-02B.
- 전자적 위치 및 접속
- 로그인 후 원문을 볼 수 있습니다.
MARC
008260126s2025 us c eng d■001000017356956
■00520260202103107
■006m o d
■007cr#unu||||||||
■020 ▼a9798290940359
■035 ▼a(MiAaPQ)AAI31935862
■040 ▼aMiAaPQ▼cMiAaPQ
■0820 ▼a630
■1001 ▼aMiller, Kailey Michelle.
■24510▼aIdentifying Physiological Mechanisms and Winter Preparatory Management Strategies to Reduce Winterkill Losses in Grass Species
■260 ▼a[Sl]▼bMichigan State University▼c2025
■260 1▼aAnn Arbor▼bProQuest Dissertations & Theses▼c2025
■300 ▼a138 p
■500 ▼aSource: Dissertations Abstracts International, Volume: 87-02, Section: B.
■500 ▼aAdvisor: Merewitz-Holm, Emily.
■5021 ▼aThesis (Ph.D.)--Michigan State University, 2025.
■520 ▼aDamaging winterkill stresses, such as ice encasement and waterlogging stresses, are expected to worsen with global climate change, damaging turfgrass species such as annual bluegrass (Poa annua) and crops like winter wheat (Triticum aestivum). Ice encasement can cause hypoxic or anoxic conditions that trap toxic gasses and metabolites, harming plant structures, growth, and yield. Fluctuating temperatures during winter can further exacerbate these issues by melting the ice, which is one of the leading causes of waterlogging. Managing these winterkill stressors is crucial for maintaining sustainable crop yields and playable field conditions. This dissertation investigates physiological mechanisms and winter management strategies for winter wheat and annual bluegrass. The first study assessed the impact of fall mowing height on spring recovery of annual bluegrass. Field plots in East Lansing, Michigan were mown at height of 3.17 mm (control), or gradually raised to maximum heights of 3.81, 4.44, and 5.08 mm. Field measurements, including normalized difference vegetative index (NDVI), leaf area index (LAI), and chlorophyll index (CHL), were taken during fall 2021/2022 and spring 2022/2023. These results indicated that NDVI, LAI, and CHL typically decreased throughout fall of both years and increased during the spring, with the 5.08 mm during fall of both years having highest NDVI, LAI, and CHL values across most sampling dates compared to the shorter mowing treatments. Higher mowing heights of 4.44 mm and 5.08 mm in the first year resulted in greater green cover percentage and faster recovery after ice encasement of either 0, 10, 20, or 40 days. Lastly, prolonged ice encasement durations decreased total nonstructural carbohydrates (TNC). In the second study, the effects of seeding depth of 0.5 inches (shallow) or 2.5 inches (deep) on photosynthesis during acclimation, oxidative damage (measured by lipid peroxidation), leaf area, biomass and yield after ice encasement stress of 0, 7, or 14 days was explored in two genotypes with contrasting coleoptile lengths: DynaGro with a longer coleoptile, and WhiteTail, with a shorter coleoptile. Shallow seeded plants resulted in consistently larger leaf area, less oxidative damage under prolonged durations of stress, and overall higher yields compared to the deeper seeded plants, and deeper seeded plants were more photosynthetically active during acclimation. The DynaGro genotype, with a longer coleoptile, resulted in larger biomass when compared to WhiteTail genotype, and tillers in both genotypes resulted in the highest biomass compared to spikes and roots. The third study analyzed photosynthetic performance and antioxidant levels in winter wheat after simulated overwintering of 0, 4, 10, or 20 days of surface ice encasement or winter desiccation. Photosynthetic parameters were measured using a dynamic environmental phenotypic imager (DEPI) chamber after respective durations of stress for four days during recovery, followed by antioxidant measurements. This resulted in finding that photosynthetic parameters such as ΦNPQ, qI, and qE helped distinguish between ice encasement and winter desiccation stress, with longer durations of stress leading to higher oxidative damage. The fourth study assessed the combined effects of ice encasement for 0, 7, 10, or 13 days, followed by 3 days of control or waterlogging on root length, leaf area, total and reproductive tiller production, and malondialdehyde (MDA) content in two genotypes with differing ice encasement tolerances: MSU and OSU. The combination of stresses reduced root length, leaf area, and increased MDA levels in leaf and root tissues of the winter wheat plants. MSU genotype produced a larger number of total tillers than OSU. Prolonged levels of ice encasement reduced reproductive tiller production during the first year, with 13 days causing the most damage to reproductive tiller production. This research improves our understanding of the effects of ice encasement on turfgrass and winter wheat growth.
■590 ▼aSchool code: 0128.
■650 4▼aAgriculture
■650 4▼aSoil sciences
■650 4▼aClimate change
■653 ▼aTriticum aestivum
■653 ▼aAnnual bluegrass
■653 ▼aBiomass
■690 ▼a0473
■690 ▼a0404
■690 ▼a0481
■71020▼aMichigan State University▼bCrop and Soil Sciences- Doctor of Philosophy.
■7730 ▼tDissertations Abstracts International▼g87-02B.
■790 ▼a0128
■791 ▼aPh.D.
■792 ▼a2025
■793 ▼aEnglish
■85640▼uhttp://www.riss.kr/pdu/ddodLink.do?id=T17356956▼nKERIS▼z이 자료의 원문은 한국교육학술정보원에서 제공합니다.


