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Horticultural and Ecophysiological Studies of Ptelea trifoliata and Ptelea crenulata.

Record Type:	Electronic resources : Monograph/item
Title/Author:	Horticultural and Ecophysiological Studies of Ptelea trifoliata and Ptelea crenulata./
Author:	Stewart, Anna Joy.
Published:	Ann Arbor : ProQuest Dissertations & Theses, : 2021,
Description:	132 p.
Notes:	Source: Dissertations Abstracts International, Volume: 83-04, Section: B.
Contained By:	Dissertations Abstracts International83-04B.
Subject:	Horticulture. -
Online resource:	http://pqdd.sinica.edu.tw/twdaoapp/servlet/advanced?query=28319813
ISBN:	9798460405541

Horticultural and Ecophysiological Studies of Ptelea trifoliata and Ptelea crenulata.
Stewart, Anna Joy.

Horticultural and Ecophysiological Studies of Ptelea trifoliata and Ptelea crenulata. - Ann Arbor : ProQuest Dissertations & Theses, 2021 - 132 p.

Source: Dissertations Abstracts International, Volume: 83-04, Section: B.

Thesis (Ph.D.)--Iowa State University, 2021.

This item must not be sold to any third party vendors.

The horticultural use of indigenous plants can serve the dual purpose of supporting local insect communities and adding visual and taxonomic diversity to landscapes. Ptelea trifoliata L. (Rutaceae), a large shrub or small tree with inflorescences of white, fragrant flowers, provides food for many insects, including the caterpillars of Papilio cresphontes Cramer. It is among the most cold-hardy members of the Rutaceae, along with Zanthoxylum americanum Mill, based on a natural distribution that includes most of the eastern, central, and southwestern United States. To promote propagation of P. trifoliata and P. crenulata Greene, a shrub native to California, seed dormancy was explored. Removal of pericarp and 16 weeks of stratification are recommended for speed, uniformity, and completeness of germination in both species. Because of the unusual distribution of Ptelea and Zanthoxylum at northern latitudes, I sought to characterize cold acclimation, maximal hardiness, and deacclimation of the most recent year's stem growth from mature shrubs. Maximal cold hardiness of P. trifoliata, Z. americanum, and P. crenulata; determined by injury to stems, was -42°C, -33°C, and -21°C; respectively, and P. crenulata deacclimated sooner in late winter than did the other species. Contrasting descriptions of floral fragrance of Ptelea led to questions about whether differences in aromatic profiles of staminate and pistillate flowers of P. trifoliata and P. crenulata and/or differences in human perception could explain this disparity. For P.crenulata and P. trifoliata, 81.1% and 77.0% of survey panelists liked the fragrance, respectively, and showed no preference for the aroma of staminate or pistillate flowers. Panelists' descriptions of flowers as citrusy, damp-earthy, spicy, sweet, light, fresh, and grassy corresponded with gas chromatography and mass spectrometry profiles, which included mostly terpenes and esters. Profiles of the aromatic compounds from pistillate flowers of P. trifoliata were more complex than were those of staminate flowers and had comparatively high concentrations of almost all aromatic compounds. Almost entirely pollinated by insects, P. trifoliata attracted insect visitors from five orders, 49 families, and at least 114 species in Iowa. I conclude that Ptelea trifoliata has potential to add diversity to horticultural landscapes as a cold-hardy shrub or tree with attractive, fragrant flowers that engage a diverse community of insects.

ISBN: 9798460405541Subjects--Topical Terms:

555447
Horticulture.
Subjects--Index Terms:

Cold acclimation

Horticultural and Ecophysiological Studies of Ptelea trifoliata and Ptelea crenulata.
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245 1 0 $a Horticultural and Ecophysiological Studies of Ptelea trifoliata and Ptelea crenulata.
260 1 $a Ann Arbor : $b ProQuest Dissertations & Theses, $c 2021
300 $a 132 p.
500 $a Source: Dissertations Abstracts International, Volume: 83-04, Section: B.
500 $a Advisor: Graves, William R.
502 $a Thesis (Ph.D.)--Iowa State University, 2021.
506 $a This item must not be sold to any third party vendors.
520 $a The horticultural use of indigenous plants can serve the dual purpose of supporting local insect communities and adding visual and taxonomic diversity to landscapes. Ptelea trifoliata L. (Rutaceae), a large shrub or small tree with inflorescences of white, fragrant flowers, provides food for many insects, including the caterpillars of Papilio cresphontes Cramer. It is among the most cold-hardy members of the Rutaceae, along with Zanthoxylum americanum Mill, based on a natural distribution that includes most of the eastern, central, and southwestern United States. To promote propagation of P. trifoliata and P. crenulata Greene, a shrub native to California, seed dormancy was explored. Removal of pericarp and 16 weeks of stratification are recommended for speed, uniformity, and completeness of germination in both species. Because of the unusual distribution of Ptelea and Zanthoxylum at northern latitudes, I sought to characterize cold acclimation, maximal hardiness, and deacclimation of the most recent year's stem growth from mature shrubs. Maximal cold hardiness of P. trifoliata, Z. americanum, and P. crenulata; determined by injury to stems, was -42°C, -33°C, and -21°C; respectively, and P. crenulata deacclimated sooner in late winter than did the other species. Contrasting descriptions of floral fragrance of Ptelea led to questions about whether differences in aromatic profiles of staminate and pistillate flowers of P. trifoliata and P. crenulata and/or differences in human perception could explain this disparity. For P.crenulata and P. trifoliata, 81.1% and 77.0% of survey panelists liked the fragrance, respectively, and showed no preference for the aroma of staminate or pistillate flowers. Panelists' descriptions of flowers as citrusy, damp-earthy, spicy, sweet, light, fresh, and grassy corresponded with gas chromatography and mass spectrometry profiles, which included mostly terpenes and esters. Profiles of the aromatic compounds from pistillate flowers of P. trifoliata were more complex than were those of staminate flowers and had comparatively high concentrations of almost all aromatic compounds. Almost entirely pollinated by insects, P. trifoliata attracted insect visitors from five orders, 49 families, and at least 114 species in Iowa. I conclude that Ptelea trifoliata has potential to add diversity to horticultural landscapes as a cold-hardy shrub or tree with attractive, fragrant flowers that engage a diverse community of insects.
590 $a School code: 0097.
650 4 $a Horticulture. $3 555447
653 $a Cold acclimation
653 $a Fragrance
653 $a Insect visitors
653 $a Native
653 $a Nursery crop
653 $a Propagation
690 $a 0471
710 2 $a Iowa State University. $b Horticulture. $3 1671764
773 0 $t Dissertations Abstracts International $g 83-04B.
790 $a 0097
791 $a Ph.D.
792 $a 2021
793 $a English
856 4 0 $u http://pqdd.sinica.edu.tw/twdaoapp/servlet/advanced?query=28319813