Area of Science:

• Plant anatomy
• Cytogenetics
• Plant breeding

Background:

• Investigating cytoplasmatic hybrids (cybrids) is crucial for understanding interspecific genetic interactions.
• Brassica napus and Lesquerella fendleri are important oilseed crops.

Purpose of the Study:

• To conduct a comparative anatomical study of a cybrid plant.
• To identify anatomical defects in the cybrid.
• To correlate anatomical defects with nuclear-cytoplasmic incompatibility.

Main Methods:

• Anatomical analysis of vegetative organs (leaf, stalk, stem, root).
• Comparison of cybrid plant anatomy with parental forms (Brassica napus and Lesquerella fendleri).

Main Results:

• The cybrid's overall anatomical structure resembled Brassica napus.
• Anomalous anatomical changes were observed in the epithelial, parenchymal, and connective tissues of the cybrid's organs.
• These defects indicate potential issues with tissue development.

Conclusions:

• Nuclear-cytoplasmic incompatibility is evident in the cybrid.
• Alien chloroplast gene expression contributes to anatomical defects.
• The observed defects likely reduce the cybrid's adaptability to in vivo conditions.