Cytogenetics of plant cell and tissue cultures and their regenerates

摘要: After a short introduction, the cytogenetics of plant cell and tissue cultures their regenerates will be discussed. In first section discussion focus on cytogenetic conditions “in vivo”, i.e., in original explant: (I) widespread ocurrence polysomaty as consequence endoreduplication; (2) aneusomaty, an important, though rare, cause chromosome number variation vivo; (3) occurrence structural changes differentiated tissues, especially association with aging; (4) mixoploidy and/or gene mutations, either nuclear or organellar, present mosaics periclinal chimeras, vegetatively propagated plants. two follow processes at during callus induction: (1) mitosis induction diploid (haploid) endoreduplicated cells initiation lines different ploidy levels; endoreduplication prior to mechanism polyploidization; fragmentation (ami...