Pioneer Hi-bred International, Inc.

Kellie Reimann

Shoba Sivasankar

Nicholas J Bate

Jeffrey Habben

Honor Renee Lafitte

Anna Lyznik

Sarah T Collinson

Jeffrey E Habben

The invention provides isolated maize EIN3, EBF1 and EIN5 nucleic acids and encoded proteins which are associated with ethylene signaling in plants. The present invention provides methods and compositions relating to altering ethylene sensitivity in plants. The invention further provides recombinant expression cassettes, host cells, transgenic plants and antibody compositions.

Maize ethylene signaling genes and modulation of same for improved stress tolerance in plants

The invention provides methods for improving plant yield, particularly under nitrogen limiting conditions. According to the invention, applicants have discovered that modulating ACC synthase activity in plants improves yield of plants, even when grown under low nitrogen conditions. The same plants, while demonstrating improved yield over non-modified plants, exhibited no deleterious effects under normal nitrogen conditions. The invention further provides methods using recombinant expression cassettes, host cells and transgenic plants.

Modulation of ACC synthase improves plant yield under low nitrogen conditions

The invention provides isolated maize EIN3, ERF3, EBF1, EBF2, EIN5 nucleic acids which are associated with ethylene signaling in plants and their encoded proteins. The present invention provides methods and compositions relating to altering ethylene sensitivity in plants. The invention further provides recombinant expression cassettes, host cells, transgenic plants and antibody compositions.

Methods and compositions for modulating plant response, development and yield under varying environmental conditions are provided. Methods employing MAPKKK are provided. The MAPKKK sequences are used in a variety of methods including modulating root development, modulating leaf and/or shoot development, modulating tolerance under abiotic stress and modulating yield. Transformed plants, plant cell, tissues, seed and expression vectors are also provided.

Compositions and methods of use of mitogen-activated protein kinase kinase kinase

Compositions and methods for regulating expression of heterologous nucleotide sequences in a plant are provided. Compositions include a novel nucleotide sequence for a maize actin depolymerization factor 4 promoter. Also provided is a method for expressing a heterologous nucleotide sequence in a plant using a promoter sequence disclosed herein.

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Ankeny, IA, United States of America

Kellie Reimann