Analysis of floral morphology of a cotton homeotic variant (CHV1).
Physiological and genetic variations exist frequently in the cotton plants regenerated from somatic embryos. A stable homeotic variant (CHV1) was identified from these regenerated plants. Morphological analysis suggested that all the floral organs of the CHV1 plants convert into bract leaf-like organs, this was confirmed by close inspection of floral organs surface using scanning electron microscope. However, there are placenta and ovules bearing at the basal region of central leaf-like organs. A flower of the variant consists of three to seven bracts, nineteen to fourty one bract leaf-like organs. Arrangement of the leaf-like organs is intermediate between spiral and whorl. The mechanisms responsible for the CHV1 phenotype are analyzed. The variant (CHV1) may be useful in the research of cotton flower development and the mechanism of somaclonal variation.
Guo
Yu Long
YL
Research Center of Biotechnology, Southwest Agriculture University, Chongqing 400716.
Xue
Mei Feng
MF
Li
Ming Yang
MY
Pei
Yan
Y
Zheng
Shang Yong
SY
D017360:Arabidopsis / Q000235:genetics / Q000254:growth & development; D002478:Cells, Cultured; D035264:Flowers / Q000235:genetics* / Q000254:growth & development / Q000648:ultrastructure; D005801:Genes, Homeobox / Q000235:genetics*; D003368:Gossypium / Q000166:cytology / Q000235:genetics* / Q000254:growth & development; D008855:Microscopy, Electron, Scanning; D009154:Mutation