Molecular cloning and expression analysis of a gene encoding rice histone protein H2B. 7.

A gene OsH2B.7 encoding rice histone protein H2B.7 was isolated and its expression profiles analyzed.The results showed that gene OsH2B.7 was constitutively expressed in roots,stems,leaves and panicles,while its expression was affected by some phytohormones and stresses.The expression was up-regulated by 2,4-D,NAA,ethylene and heat,while down-regulated by KT and Paclobutrazol.These indicate that the expression of gene OsH2B.7 is responsible to the internal and external signals.