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INVESTIGATIONS OF HYDRANGEA DISTORTI...

BAILEY, DOUGLAS ALAN.

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INVESTIGATIONS OF HYDRANGEA DISTORTION IN FLORISTS' HYDRANGEA (HYDRANGEA MACROPHYLLA (THUNB.)).

Record Type:	Electronic resources : Monograph/item
Title/Author:	INVESTIGATIONS OF HYDRANGEA DISTORTION IN FLORISTS' HYDRANGEA (HYDRANGEA MACROPHYLLA (THUNB.))./
Author:	BAILEY, DOUGLAS ALAN.
Published:	Ann Arbor : ProQuest Dissertations & Theses, : 1986,
Description:	97 p.
Notes:	Source: Dissertations Abstracts International, Volume: 47-07, Section: B.
Contained By:	Dissertations Abstracts International47-07B.
Subject:	Botany. -
Online resource:	https://pqdd.sinica.edu.tw/twdaoapp/servlet/advanced?query=8709769

INVESTIGATIONS OF HYDRANGEA DISTORTION IN FLORISTS' HYDRANGEA (HYDRANGEA MACROPHYLLA (THUNB.)).
BAILEY, DOUGLAS ALAN.

INVESTIGATIONS OF HYDRANGEA DISTORTION IN FLORISTS' HYDRANGEA (HYDRANGEA MACROPHYLLA (THUNB.)). - Ann Arbor : ProQuest Dissertations & Theses, 1986 - 97 p.

Source: Dissertations Abstracts International, Volume: 47-07, Section: B.

Thesis (Ph.D.)--Purdue University, 1986.

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

Studies were undertaken to (1) identify the environmental conditions that lead to hydrangea distortion; (2) describe both the macro- and micro-scopic symptoms of hydrangea distortion; (3) examine the relationship between foliar nutrition and hydrangea distortion; and (4) investigate the possibility of a pathogenic origin for hydrangea distortion. Results indicate hydrangea distortion is under thermal regulation. Foliar symptoms can be stimulated by ambient temperatures of 33/26(DEGREES)C (day/night), but the elevated temperatures must be maintained to sustain the production of distorted foliage. Higher photosynthetic photon flux results in a more rapid appearance of symptoms, but elevated leaf surface temperatures did not affect the appearance of distortion symptoms. Maintaining root zone temperatures of 20/18(DEGREES)C (day/night) in a distorting environment moderates but does not prevent hydrangea distortion. Distinct anatomical and morphological differences were documented for distorted and nondistorted leaves. It is not known whether these changes are the cause of or a result of hydrangea distortion. No apparent protein differences as determined by SDS-PAGE were associated with hydrangea distortion. Attempts to produce hydrangea distortion through nutrient imbalances were unsuccessful. Hydrangea distortion does not appear to be correlated with any nutrient deficiency or micronutrient toxicity. No pathogen could be associated with hydrangea distortion and symptoms appear to be nontransmittable. It is suggested that hydrangea distortion is strictly physiological and its expression is a genotype x environment interaction. Thermotolerant cultivars do exist and may offer an alternative to the production of present commercially popular cultivars.Subjects--Topical Terms:

516217
Botany.

INVESTIGATIONS OF HYDRANGEA DISTORTION IN FLORISTS' HYDRANGEA (HYDRANGEA MACROPHYLLA (THUNB.)).
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100 1 $a BAILEY, DOUGLAS ALAN. $3 3559745
245 1 0 $a INVESTIGATIONS OF HYDRANGEA DISTORTION IN FLORISTS' HYDRANGEA (HYDRANGEA MACROPHYLLA (THUNB.)).
260 1 $a Ann Arbor : $b ProQuest Dissertations & Theses, $c 1986
300 $a 97 p.
500 $a Source: Dissertations Abstracts International, Volume: 47-07, Section: B.
500 $a Publisher info.: Dissertation/Thesis.
502 $a Thesis (Ph.D.)--Purdue University, 1986.
506 $a This item must not be sold to any third party vendors.
506 $a This item must not be added to any third party search indexes.
520 $a Studies were undertaken to (1) identify the environmental conditions that lead to hydrangea distortion; (2) describe both the macro- and micro-scopic symptoms of hydrangea distortion; (3) examine the relationship between foliar nutrition and hydrangea distortion; and (4) investigate the possibility of a pathogenic origin for hydrangea distortion. Results indicate hydrangea distortion is under thermal regulation. Foliar symptoms can be stimulated by ambient temperatures of 33/26(DEGREES)C (day/night), but the elevated temperatures must be maintained to sustain the production of distorted foliage. Higher photosynthetic photon flux results in a more rapid appearance of symptoms, but elevated leaf surface temperatures did not affect the appearance of distortion symptoms. Maintaining root zone temperatures of 20/18(DEGREES)C (day/night) in a distorting environment moderates but does not prevent hydrangea distortion. Distinct anatomical and morphological differences were documented for distorted and nondistorted leaves. It is not known whether these changes are the cause of or a result of hydrangea distortion. No apparent protein differences as determined by SDS-PAGE were associated with hydrangea distortion. Attempts to produce hydrangea distortion through nutrient imbalances were unsuccessful. Hydrangea distortion does not appear to be correlated with any nutrient deficiency or micronutrient toxicity. No pathogen could be associated with hydrangea distortion and symptoms appear to be nontransmittable. It is suggested that hydrangea distortion is strictly physiological and its expression is a genotype x environment interaction. Thermotolerant cultivars do exist and may offer an alternative to the production of present commercially popular cultivars.
590 $a School code: 0183.
650 4 $a Botany. $3 516217
690 $a 0479
710 2 $a Purdue University. $3 1017663
773 0 $t Dissertations Abstracts International $g 47-07B.
790 $a 0183
791 $a Ph.D.
792 $a 1986
793 $a English
856 4 0 $u https://pqdd.sinica.edu.tw/twdaoapp/servlet/advanced?query=8709769