Title page for ETD etd-10212005-122949


Type of Document Dissertation
Author Yan, JiYu
URN etd-10212005-122949
Title Influence of plant growth regulators on turfgrass polar lipid composition, tolerance to drought and salinity stresses, and nutrient efficiency
Degree PhD
Department Crop and Soil Environmental Sciences
Advisory Committee
Advisor Name Title
Schmidt, R. E. Committee Chair
Martens, David C. Committee Co-Chair
Hall III, J. R. Committee Member
Orcutt, David. M. Committee Member
Parish, David J. Committee Member
Keywords
  • Turfgrasses Physiology.
  • Plant regulators.
Date of Defense 1993-03-03
Availability restricted
Abstract
Two groups of plant growth regulators (PGRs), seaweed extract and triazole chemical, have been used in turfgrass management for improving turf quality and strengthening turfgrass tolerance to environmental stress. In order to understand the

physiological functions and stress-tolerance mechanisms of the PGRs on turfgrass, a series of studies were conducted with perennial ryegrass (Lolium perenne L.). Ryegrass was treated with or without propiconazole (PPC) (1-( (2-(2,4-

dichlorophenyl)-4-propyl-l,3-dioxolan-2yl)methyl) IH-l,2,4-triazole) and a proprietary fortified seaweed extract (FSE), which were combined with or without drought and salinity stress treatment. Total lipids, fatty acid composition of polar lipids, and total free and conjugated sterols were determined by the thin layer chromatograph, gas chromatograph, and scanner densitometer. This study indicates that ppe and FSE affected the unsaturation of polar lipid fatty acids and concentration of free sterols, which are major factors in changing cell membrane fluidity and permeability. The PGR-induced-process to protect plant membrane function under drought and salinity stresses.

Files
  Filename       Size       Approximate Download Time (Hours:Minutes:Seconds) 
 
 28.8 Modem   56K Modem   ISDN (64 Kb)   ISDN (128 Kb)   Higher-speed Access 
[BTD] LD5655.V856_1993.Y36.pdf 4.77 Mb 00:22:04 00:11:21 00:09:56 00:04:58 00:00:25
[BTD] next to an author's name indicates that all files or directories associated with their ETD are accessible from the Virginia Tech campus network only.

Browse All Available ETDs by ( Author | Department )

dla home
etds imagebase journals news ereserve special collections
virgnia tech home contact dla university libraries

If you have questions or technical problems, please Contact DLA.