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Understanding Mechanisms of Adaptation of Potato to Long-Term Heat Stress : = Physiological and Molecular Aspects.

紀錄類型:	書目-電子資源 : Monograph/item
正題名/作者:	Understanding Mechanisms of Adaptation of Potato to Long-Term Heat Stress :/
其他題名:	Physiological and Molecular Aspects.
作者:	Schabow, Justin Edward.
面頁冊數:	1 online resource (246 pages)
附註:	Source: Dissertations Abstracts International, Volume: 84-01, Section: B.
Contained By:	Dissertations Abstracts International84-01B.
標題:	Plant sciences. -
電子資源:	http://pqdd.sinica.edu.tw/twdaoapp/servlet/advanced?query=29255352click for full text (PQDT)
ISBN:	9798834030225

Understanding Mechanisms of Adaptation of Potato to Long-Term Heat Stress : = Physiological and Molecular Aspects.
Schabow, Justin Edward.

Understanding Mechanisms of Adaptation of Potato to Long-Term Heat Stress :Physiological and Molecular Aspects. - 1 online resource (246 pages)

Source: Dissertations Abstracts International, Volume: 84-01, Section: B.

Thesis (Ph.D.)--The University of Wisconsin - Madison, 2022.

Includes bibliographical references

Potatoes are known to grow well in cool climates. Most studies have documented the impact of heat stress on potato under short-term high temperatures (days). However, very little has been reported on long-term adaptation (weeks) of potato plants to heat stress. The three projects in this study were conducted to investigate strategies employed by potato plants to physiologically adapt to heat stress, investigate the genes and gene pathways that may be important to heat stress adaptation, and to create a methodology based on membrane thermostability to calculate an estimate of heat tolerance (HT) and heat tolerance ability (HAA). These studies used commercial cultivars, diverse varieties, or wild species derived from shoot culture plantlets or seed tubers that were grown in a controlled environment room under cool (20/15 °C, day/night) and heat stress (35/ 25 °C, day/night) conditions. The leaflets produced from the same plant under both conditions were compared and the heat-adapted leaves had higher rates of photosynthesis and stomatal conductance (SC) and lower leaf temperatures compared to control leaflets. These results show that heat-adapted leaflets can maintain lower leaf temperatures by increasing transpiration (higher SC) thereby allowing higher photosynthetic rates and shows a potential strategy used by potato to mitigate high temperature stress. RNA expression analysis between Atlantic and wild Solanum microdontum showed genes and gene pathways that were differentially expressed between these cool and heat-adapted leaflets. The most enriched pathways and most highly regulated genes among both genotypes were involved with heat shock proteins, lipid saturation, oxidative stress mitigation, ABA, and photosynthesis. These results suggest the involvement of genes and pathways that may be important in HT in potato. A HT assay, based on membrane thermostability, was developed to calculate HT estimates in control and heat-adapted leaflets that were used to calculate an estimate of HAA in diverse plant materials. This method was able to differentiate significant variability between diverse genotypes using all three estimates. This work contributes knowledge to possible traits, genes, and gene pathways that may contribute to HT in potato and developed a methodology to screen for potato plant material that may demonstrate improved HT and HAA.

Electronic reproduction.
Ann Arbor, Mich. :
ProQuest,
2023

Mode of access: World Wide Web

ISBN: 9798834030225Subjects--Topical Terms:

3173832
Plant sciences.
Subjects--Index Terms:

Solanum commersoniiIndex Terms--Genre/Form:

542853
Electronic books.

Understanding Mechanisms of Adaptation of Potato to Long-Term Heat Stress : = Physiological and Molecular Aspects.
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