Article

DNA damage in the early primordial anther is closely correlated with stamen arrest in the female flower of cucumber (Cucumis sativus L.).

PKU-Yale Joint Research Center of Agricultural and Plant Molecular Biology, National Key Laboratory of Protein Engineering and Plant Gene Engineering, College of Life Sciences, Peking University, 5 Yiheyuan Road, 100871 Beijing, China.
Planta (impact factor: 3). 11/2003; 217(6):888-95. DOI:10.1007/s00425-003-1064-x pp.888-95
Source: PubMed

ABSTRACT To investigate the regulatory mechanisms of sex expression in cucumber, morphological observations and biochemical analyses were carried out on inappropriate stamen development of female flowers of cucumber. It was found that developmental arrest of the inappropriate stamen mainly occurs at the anther primordium. This arrest is closely correlated with DNA damage, as detected by TUNEL assay, and might result from anther-specific DNase activation. It was also found that the DNA damage does not lead to cell degeneration, although chromatin condensation is observed in the anther primordia.

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Keywords

anther-specific DNase activation
 
biochemical analyses
 
cell degeneration
 
cucumber
 
female flowers
 
inappropriate stamen
 
inappropriate stamen development
 
morphological observations
 
regulatory mechanisms
 
TUNEL assay