No abstract

The N-terminal amino acid sequence of the small subunit of ribulose-l,5-disphosphate carboxylase from the amphidiploid Nicotiana tabacum contains two polymorphisms. From examination of the equivalent sequences in the putative parent species Nicotiana sylvestris and tomentosiformis it is concluded that the amphidiploid Nicotiana tabacum has inherited two alleles for the small subunit of ribulose diphosphate carboxylase, one from each parent species. The alleles continue to be retained and expressed. The relevance of these findings is discussed in relation to the successful adaption of the amphidiploid Nicotiana tabacum to a wide range of environments.

No abstract