关键词: UV-B, UV-B, 中高海拔, 干旱地区, 玉米

Abstract:

Birch (Betula Linn) is one of the most important industrial wood species. Technology of the tissue culture provides an efficient approach for the vegetative propagation of birch.The research progress in tissue culture of birch were briefly introduced in this paper, including callus and organ culture, and protoplast culture. This paper also reviewed the recent progress in secondary metabolites biosynthesis and gene transformation basic on birch tissue culture. Moreover, the problems existing in the present birch biotechnological research were discussed and the promising aspects for further research were evaluated in this review.