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Functional Implications of Root Arch...

Strock, Christopher Finian.

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Functional Implications of Root Architectural and Anatomical Phenes for Soil Resource Capture.

紀錄類型:	書目-電子資源 : Monograph/item
正題名/作者:	Functional Implications of Root Architectural and Anatomical Phenes for Soil Resource Capture./
作者:	Strock, Christopher Finian.
出版者:	Ann Arbor : ProQuest Dissertations & Theses, : 2019,
面頁冊數:	237 p.
附註:	Source: Dissertations Abstracts International, Volume: 80-12, Section: B.
Contained By:	Dissertations Abstracts International80-12B.
標題:	Botany. -
電子資源:	http://pqdd.sinica.edu.tw/twdaoapp/servlet/advanced?query=13917961
ISBN:	9781392318942

Functional Implications of Root Architectural and Anatomical Phenes for Soil Resource Capture.
Strock, Christopher Finian.

Functional Implications of Root Architectural and Anatomical Phenes for Soil Resource Capture. - Ann Arbor : ProQuest Dissertations & Theses, 2019 - 237 p.

Source: Dissertations Abstracts International, Volume: 80-12, Section: B.

Thesis (Ph.D.)--The Pennsylvania State University, 2019.

The common bean (Phaseolus vulgaris) is an important food security crop for smallholder famers throughout the developing world. Drought stress and poor soil fertility are some of the biggest constraints to yield of P. vulgaris in these regions. Breeding efforts to improve soil resource acquisition efficiency of the root system may be one of the most pragmatic strategies to sustainably mitigate yield deficits in marginal environments. Variation for architectural and anatomical root phenes has important effects on water and nutrient acquisition by modifying the distribution of root foraging in the soil, the metabolic costs of soil exploration, and the transport of water and nutrients. The following work utilizes in silico, greenhouse, and field trials to characterize architectural and anatomical root phenes in Phaseolus species and quantify their contribution to water and phosphorus capture. The results of this work suggest that 1) measures of root architecture in seedlings are representative of root architecture in the field, and these seedling root traits have important relationships with yield under a diversity of conditions. 2) Laser ablation tomography serves as a novel method to qualify and quantify root anatomical phenes and their interactions with edaphic organisms. 3) Under phosphorus deficit, genotypes with roots that favor primary growth over secondary growth have reduced metabolic costs, greater soil exploration, and greater phosphorus capture. 4) Variation for metaxylem vessel morphology impacts hydraulic conductance of the root system, and interacts with root system depth and water distribution in the field to affect water use under drought.

ISBN: 9781392318942Subjects--Topical Terms:

516217
Botany.

Functional Implications of Root Architectural and Anatomical Phenes for Soil Resource Capture.
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