(Reuters) - Jean-Charles Boisset, scion of Burgundy's largest wine empire, has been called Mr. Pinot Noir for his enthusiasm for the grape that he tends on both sides of the Atlantic. The 41-year-old, who spent much of his youth in California soaking up sun, surf and a business degree, lives his life by a few rules he learned as a child."We are the stewards of the earth - this I learned from my grandmothers," said Boisset, who married into a U.S. wine dynasty last year when he wed Gina Gallo.