TECHNOLOGY FOCUS - BIOTECHNOLOGY - Preparation: Producing (I) that induces a hypersensitive response or resistance on a mass-scale, by isolating and purifying (I) from cultures of E.pyrifoliae WT3 (KCCM 10283) and transformants containing a plant hypersensitive response (HR)-inducing gene of the strain (KCCM 10282) from E.pyrifoliae WT3 (KCCM 10283) (claimed). Preferred Protein: The E.pyrifoliae is E.pyrifoliae WT3 (KCCM 10283). (I) is a recombinant protein. Preferred Transformants: The transformants are selected from bacteria and plants. ACTIVITY - Pesticide; Fertilizer; Growth Stimulant.    MECHANISM OF ACTION - Hypersensitive-Response-Inducer. The stems and leaves of strawberries cultivated at a green house was treated with plant HR-inducing protein (Pioneer) at a dose of 20 mug/ml. HrpN (a plant-sensitive protein derived from E.amylovora ATCC 15580), a control, was also given to the stems and leaves of green peppers at the same dose. At the implantation of day 30, 33, 38, 41, 48 and 55, strawberries were harvested and total weight was measured. The results showed that Pioneer exhibited better facilitated production effect of strawberries than HrpN by 13.8%. Pioneer was thus more effectively used as a plant growth activator and a fertilizer than HrpN.    SPECIFIC SEQUENCES - (I) has a sequence comprising 429 amino acids fully defined in the specification, and encoded by a sequence comprising 1287 nucleotides fully defined in the specification (claimed).    EXAMPLE - To analyze a gene encoding specific protein eliciting a plant hypersensitive response, total DNA of Erwinia pyrifoliae WT3 was incubated at 37 degrees C to ensure that it was partially digested with Sau3AI. The DNA (1 microl) was then examined for appropriate digestion on an electrophoresis at the intervals of 1 hour, and the result revealed that about 6 hours of digestion was most appropriate. Total DNA, so manipulated, was prepared as an insertion DNA and ligated into the BamHI polylinker site of cloning vector pLAFR3 using DNA ligase by incubating at 14 degrees C for 12 hours. A complete plasmid DNA ligated with the insertion DNA and a vector was transformed to Escherichia coli (HB101) through CaCl2 transformation. Then, E.coli strains were cultivated on Luria agar medium containing tetracycline (30 mg/ml) at 37 degrees C for 24 hours and 2000 genomic library clones were generated. Clones encoding the specific protein eliciting a plant hypersensitive reaction were selected from the 2000 genomic DNA library clones of E.pyrifoliae WT3. From E.pyrifoliae WT3, a 1287 bp gene (fully defined in the specification) encoding a protein of plant hypersensitive response was obtained. The 1287 bp gene was designated as a plant hypersensitive response (HR)-inducing gene from WT3 and its similarity to hrpN gene of Erwinia amylovora ATCC15580T (1212 bp) was investigated. The gene encoding the plant HR-inducing protein of E.pyrifoliae WT3 had a different nucleotide sequences from hrpN gene of E.amylovora and also had the insertions of novel nucleotide sequences fragments (e.g., TTTAACGGG at 222-230 bp, TGGCGGCGGTCTGCT at 249-263 bp, TCTGGGT at 327-333 bp, CGGCATTGGCGGCGCATTGGTGG at 348-317 bp, and ACCGTGGGGACCTCT at 397-411 bp), thus showing that the plant HR-inducing gene from WT3 had a novel gene structure which was not found in hrpN gene of E.amylovora.