Answers are grounded in this paper and cite their sources.
Marguerite J. Varagona, Robert J. Schmidt, Natasha V. Raikhel, Monocot Regulatory Protein Opaque-2 Is Localized in the Nucleus of Maize Endosperm and Transformed Tobacco Plants, The Plant Cell, Vol. 3, No. 2 (Feb., 1991), pp. 105-113
No takes yet. Share an insight, caveat, or question.
Varagona et al. (1991) studied this question.
Synapse has enriched 10 related papers. Consider them for comparative context: