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ARS Home » Pacific West Area » Albany, California » Plant Gene Expression Center » Research » Research Project #420397

Research Project: Molecular Genetics of Ethylene Biosynthesis

Location: Plant Gene Expression Center

2013 Annual Report

1a. Objectives (from AD-416):
1: To determine the ethylene biosynthetic capacity of the tomato plant. [NP 301, C 4, PS 4A] 2: To determine some of the molecular details of the regulation of the tomato genes by the hormone auxin. [NP 301, C 4, PS 4A]

1b. Approach (from AD-416):
Ethylene is a unique plant signaling molecule. The hydrocarbon gas, known as the fruit ripening hormone, controls many aspects of plant growth and development, and its synthesis is highly regulated. Recent experimental evidence indicates that the key enzyme in the ethylene biosynthetic pathway,1-aminocyclopropane-1-carboxylic acid (ACC) synthase (ACS) is encoded by a highly divergent multigene family in various mono and dicotyledonous plants. The members of each family are differentially regulated by various inducers and developmental stages. Studies on the heterodimerization properties of the various ACS isozymes are proposed in order to determine the biochemical capacity of the ACC gene family. Functional intermolecular complementation and biomolecular fluorescence complementation (BiFC) experiments will be carried to achieve this objective. Furthermore, molecular experiments are proposed to determine which of the Auxin Response Factor (ARF) gene family members regulates the various ACS genes in tomato. REPLACES 5335-21430-006-00D (9/10). BSL 1; 2/19/08.

3. Progress Report:
The SY retired and PGEC is currently recruiting for a new SY. A new research project will be written prior to the expiration of this project (12/2013) or a bridge project will be put in place.

4. Accomplishments