A Study of Growth of Several Plant Species as Influenced By the Plant Growth Regulator Ethephon

Ethephon was applied to seeds, seedlings or cuttings by soaking or drenching the plant material for varying lengths of time in a range of dilutions of exogenous ethylene to determine its effects on growth. Species studied were Vitis Labrusca L., Carya Illinoinensis (Wangenh.) K.Koch, Kniphofia x praecox Bak. Tagetes erecta L., Tradescantia zebrina hort. ex Bosse and Adenium obesum (Forssk.) Roem& Schult. Of the species listed, Tradescantia had the most positive response in growth to ethephon treatments. Total plant dry weight of Tradescantia cuttings significantly increased with ethephon applications, along with increases in lateral shoot length. Trends of increasing plant fresh weight and was established with 24 hour seed soak treatments in Adenium, trends of increasing dry weight was established in Carya, and tendencies of increased dry weight above control treatments were observed in 2 hour cutting and root soaks in Vitis and Kniphofia respectively. Treatments of ethephon drenches on Tagetes and Kniphofia species proved to be too strong and/or too frequent. Maximum and minimum concentrations of ethephon for most of these species were observed and would be valuable for future research.

Name thesis:degree_name

Master of Natural and Applied Science in Biology

Level thesis:degree_level

Masters

Discipline thesis:degree_discipline

Biology

Year

2001

Author dc:creator

• Straus, Julie

Contributors dc:contributor

• Pamela Borden

• Biology

Statement dc:rights

• © Julie Straus

Repository record dc:identifier

https://bearworks.missouristate.edu/theses/883

OAI identifier oai:identifier

oai:bearworks.missouristate.edu:theses-1884