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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 Reduc...
Identifying Physiological Mechanisms and Winter Preparatory Management Strategies to Reduce Winterkill Losses in Grass Species

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자료유형  
 학위논문 서양
최종처리일시  
20260202103107
ISBN  
9798290940359
DDC  
630
저자명  
Miller, Kailey Michelle.
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  
Triticum aestivum
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  
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MARC

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■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.

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