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Fruit Growth and Hormonal Regulation of Bitter Pit in 'Honeycrisp' Apple
Fruit Growth and Hormonal Regulation of Bitter Pit in 'Honeycrisp' Apple
상세정보
- 자료유형
- 학위논문 서양
- 최종처리일시
- 20260202104825
- ISBN
- 9798290944678
- DDC
- 635
- 서명/저자
- Fruit Growth and Hormonal Regulation of Bitter Pit in Honeycrisp Apple
- 발행사항
- [Sl] : Michigan State University, 2025
- 발행사항
- Ann Arbor : ProQuest Dissertations & Theses, 2025
- 형태사항
- 178 p
- 주기사항
- Source: Dissertations Abstracts International, Volume: 87-02, Section: B.
- 주기사항
- Advisor: Einhorn, Todd.
- 학위논문주기
- Thesis (Ph.D.)--Michigan State University, 2025.
- 초록/해제
- 요약Bitter pit is a physiological disorder of the outer cortex of apple fruit. Bitter pit is of great commercial interest as 'Honeycrisp', the fourth-most widely grown and most profitable apple cultivar in the United States, is especially susceptible with losses of greater than 40% in years of high incidence in Michigan. The disorder results from calcium-deficiency, but is not eliminated by calcium applications and is only poorly predicted by fruit calcium concentration at maturity. The mechanistic reasons behind this remain poorly understood.Because calcium transport, in-planta, occurs exclusively in the xylem, experiments were designed to manipulate the rate of xylem dysfunction in 'Honeycrisp'. The first study utilized auxins and ABA to prolong xylem functionality with the goal of reducing bitter pit. These treatments did improve primary bundle longevity and reduced bitter pit incidence by roughly 60%, but did not improve fruit calcium. A second study again examined the effects of the most efficacious rates of the PGRs from the previous study, IAA, NAA, and ABA, on xylem function, fruit calcium and bitter pit, but did so weekly to observe how fruit growth, xylem function, and calcium changed as a result of treatment. NAA and ABA treatments again reduced bitter pit incidence by increasing cumulative xylem function (CXF). CXF was consistently correlated to bitter pit incidence while primary bundle counts and fruit calcium concentrations were not.A third study paired experiments designed to manipulate fruit growth rate, believed to be the cause of xylem dysfunction, through sink competition (crop load) and shading. Growth of fruit, in the form of cumulative relative growth rate, was consistent across xylem dysfunction benchmarks, linking rapid fruit growth with increased incidence of bitter pit through strain-induced dysfunction of xylem networks in the outer cortex.The results of these studies give support for the partial reclassification of bitter pit from a calcium-deficiency disorder to a hormone-imbalance or growth disorder.
- 일반주제명
- Horticulture
- 일반주제명
- Physiology
- 일반주제명
- Plant sciences
- 키워드
- Growth modeling
- 키워드
- Peripheral xylem
- 키워드
- Rapid growth
- 기타저자
- Michigan State University Horticulture - Doctor of Philosophy
- 기본자료저록
- Dissertations Abstracts International. 87-02B.
- 전자적 위치 및 접속
- 로그인 후 원문을 볼 수 있습니다.
MARC
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■00520260202104825
■006m o d
■007cr#unu||||||||
■020 ▼a9798290944678
■035 ▼a(MiAaPQ)AAI32169760
■040 ▼aMiAaPQ▼cMiAaPQ
■0820 ▼a635
■1001 ▼aGriffith, Chayce.
■24510▼aFruit Growth and Hormonal Regulation of Bitter Pit in 'Honeycrisp' Apple
■260 ▼a[Sl]▼bMichigan State University▼c2025
■260 1▼aAnn Arbor▼bProQuest Dissertations & Theses▼c2025
■300 ▼a178 p
■500 ▼aSource: Dissertations Abstracts International, Volume: 87-02, Section: B.
■500 ▼aAdvisor: Einhorn, Todd.
■5021 ▼aThesis (Ph.D.)--Michigan State University, 2025.
■520 ▼aBitter pit is a physiological disorder of the outer cortex of apple fruit. Bitter pit is of great commercial interest as 'Honeycrisp', the fourth-most widely grown and most profitable apple cultivar in the United States, is especially susceptible with losses of greater than 40% in years of high incidence in Michigan. The disorder results from calcium-deficiency, but is not eliminated by calcium applications and is only poorly predicted by fruit calcium concentration at maturity. The mechanistic reasons behind this remain poorly understood.Because calcium transport, in-planta, occurs exclusively in the xylem, experiments were designed to manipulate the rate of xylem dysfunction in 'Honeycrisp'. The first study utilized auxins and ABA to prolong xylem functionality with the goal of reducing bitter pit. These treatments did improve primary bundle longevity and reduced bitter pit incidence by roughly 60%, but did not improve fruit calcium. A second study again examined the effects of the most efficacious rates of the PGRs from the previous study, IAA, NAA, and ABA, on xylem function, fruit calcium and bitter pit, but did so weekly to observe how fruit growth, xylem function, and calcium changed as a result of treatment. NAA and ABA treatments again reduced bitter pit incidence by increasing cumulative xylem function (CXF). CXF was consistently correlated to bitter pit incidence while primary bundle counts and fruit calcium concentrations were not.A third study paired experiments designed to manipulate fruit growth rate, believed to be the cause of xylem dysfunction, through sink competition (crop load) and shading. Growth of fruit, in the form of cumulative relative growth rate, was consistent across xylem dysfunction benchmarks, linking rapid fruit growth with increased incidence of bitter pit through strain-induced dysfunction of xylem networks in the outer cortex.The results of these studies give support for the partial reclassification of bitter pit from a calcium-deficiency disorder to a hormone-imbalance or growth disorder.
■590 ▼aSchool code: 0128.
■650 4▼aHorticulture
■650 4▼aPhysiology
■650 4▼aPlant sciences
■653 ▼aCalcium-deficiency
■653 ▼aGrowth modeling
■653 ▼aPeripheral xylem
■653 ▼aPlant growth regulators
■653 ▼aRapid growth
■653 ▼aXylem dysfunction
■690 ▼a0471
■690 ▼a0479
■690 ▼a0719
■71020▼aMichigan State University▼bHorticulture - 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=T17359038▼nKERIS▼z이 자료의 원문은 한국교육학술정보원에서 제공합니다.


