Korea University Industry and Academy Cooperation Foundation

Korea University Research and Business Foundation

Korea Research Institute of Bioscience and Biotechnology

Korea University Industrial Academic Collaboration Foundation

Korea University Industry and Academy Corporation Foundation

Korea University Industry & Academy Cooporation Foundation

Jeong Sheop Shin

Seol Ah Noh

Jung Myung Bae

Man Sup Kwak

Kyung Hee Paek

Beung Tae Ryu

Sung Chul Bahn

Kyoung Shin Yoo

Kwang Wook Jung

Sung Han Ok

Hae Jin Kim

Sun-Hee Park

Min Kyung You

Mei Hua Cui

Yun Young Kim

Shin Woo Lee

Haeng Soon Lee

The present invention relates to a novel gene, IbENOD93, and transgenic plants using the same. More specifically, the present invention provides an IbENOD93 gene, an open reading frame (ORF) of the IbENOD93 gene, a recombinant vector comprising the gene or the ORF, and a transformant transformed with the vector. Moreover, the present invention provides a composition for enhancing root thickening growth and promoting maturation in a plant having storage root(s). Furthermore, the present invention provides a method for producing a transgenic plant having storage root(s) with enhanced thickening growth, and a method for regulating or enhancing root thickening growth and maturation in a plant having storage root(s). According to the present invention, it is possible to promote the thickening growth of storage roots as well as the growth of aerial part. Therefore, the present invention can be effectively used to promote the thickening growth of storage roots of high-value root crops such as ginseng, sweet potato, etc. and to produce early-maturing transgenic plants.

Gene IbENOD93 and transgenic plants using the same

A laticiferous tissue-specific SRPP (small rubber particle-associated protein) promoter derived from, consists of nucleotide sequence of SEQ ID NO: 1. A recombinant plant expression vector includes the promoter. A plant is transformed with the recombinant plant expression vector and seed of the transformed plant is obtained. A method for laticiferous tissue-specific expression of a foreign gene in a transformed plant includes performing recombination of a foreign gene into the recombinant plant expression vector. The transformed plant produced by the method shows laticiferous tissue-specific expression of a foreign gene.

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Disclosed herein are a sweetpotato SRD1 cDNA, a plant transformation vector carrying the same, and a transgenic plant comprising the vector. The thickening growth of storage roots of the transgenic sweetpotato prepared using the SRD1 cDNA is stimulated, increasing the number of storage roots by up to two times. Therefore, SRD1 according to the present subject matter is useful in the generation of transgenic root crops with high-numbered storage roots or early-maturing storage root plants.

Disclosed herein are antisense DNA of a sweetpotato expansin (IbExpansin) cDNA, a plant transformation vector carrying the same, and a method for increasing storage root production using the same. The transgenic sweetpotatoes prepared using the antisense DNA of IbExpansin cDNA have storage root production increased by up to one and half times. Thus, the gene is useful in the generation of highly productive transgenic storage roots for the increase of bioethanol production.

Antisense DNA of sweetpotato expansin cDNA and method for increasing storage root yield using the same

Disclosed herein are angene (AtLEJ1), acting as an inhibitor of the biosynthesis of the phytohormones jasmonic acid and ethylene, and a method for producing a male sterile transgenic plant using the same. The gene guarantees stable male sterile strains which need no maintainers for the maintenance thereof. Also, the transgenic plants comprising the gene can be readily restored to a fertile phenotype merely through hormonal treatment. Although the preferred embodiments of the present invention have been disclosed for illustrative purposes, those skilled in the art will appreciate that various modifications, additions and substitutions are possible, without departing from the scope and spirit of the invention as disclosed in the accompanying claims.

Disclosed herein are a sweetpotato expansin cDNA (IbExpansin), a plant transformation vector carrying the same, and a transgenic plant comprising the vector. The transgenic, prepared using the IbExpansin cDNA, outgrows the wild-type, thereby increasing in size and seed production up to three times. Thus, the gene is useful in the generation of highly productive transgenic plants for improvement in biomass and/or seed production.

Sweetpotato expansin cDNA and high-yield transgenic plants using the same

Disclosed herein are a novel sucrose-inducible promoter sequence and a 5' untranslated region which are derived from sweetpotato ADP-glucose pyrophosphorlyase gene (ibAGP1) (SEQ ID NO: 1). Also disclosed are expression vectors using the same sequences and a transgenic plant using the same vectors. The promoter and 5&#x2032; untranslated region according to the present invention can confer a high level of sucrose-inducible expression in plants, particularly in plant storage roots which contain sucrose in relatively large quantities to accumulate starch in large quantities in plants. Therefore the present invention may be useful for the generation of transgenic plants to produce useful proteins in large quantities in plant storage roots.

Sucrose-inducible promoter from sweetpotato

The present invention relates to a promoter directing high levels of expression of a gene in plant storage roots, derived from the sweet potato MADS-box gene, a vector directing high levels of expression of a gene in plant storage roots comprising the same and a transient assay method expressing a foreign gene transiently in plant storage roots using the same vector. The promoter according to the present invention can induce high levels of expression particularly in plant storage roots. Therefore the present invention is very useful for the development of transgenic plants to produce valuable materials in large quantities in plant storage roots.

Sweet potato MADS-box promoter directing high level expression in plant storage root

Disclosed herein is a novel gene which is isolated fromand shows senescence-specific expression. The expression of the gene is under the regulation of a promoter which is also disclosed herein. The gene in combination with the promoter can be utilized at the molecular level to control plant senescence in an environmentally friendly manner.

Plant senescence-specific gene and its promoter

An isolated solely pollen-specific promoter derived fromcomprise a nucleotide sequence ofPLA-&#x3b4; gene. The novel promoter has specific roles in particular organs and at particular developmental stages, such as in mature flowers, and can be used in the production of hybrid seeds using male sterility techniques.

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Seoul, South Korea

Jeong Sheop Shin