期刊
PLANT MOLECULAR BIOLOGY
卷 71, 期 1-2, 页码 1-14出版社
SPRINGER
DOI: 10.1007/s11103-009-9504-z
关键词
MADS-box gene; Cytoplasmic homeosis; Ovule formation; Pistillody; Alloplasmic wheat
资金
- Ministry of Education, Science and Culture of Japan [17580009]
- Fukui Prefectural Government
- Grants-in-Aid for Scientific Research [21380009] Funding Source: KAKEN
Homeotic transformation of stamens into pistil-like structures (pistillody) has been reported in cytoplasmic substitution (alloplasmic) lines of bread wheat (Triticum aestivum L.) that have the cytoplasm of a related wild species, Aegilops crassa. An ectopic ovule differentiates in the pistil-like stamen in the alloplasmic wheat. The SEEDSTICK (STK)-like class D MADS-box gene, wheat STK (WSTK), was expressed in the primordia of ectopic ovules in the pistil-like stamens as well as in the true pistil, suggesting that ectopic ovule formation results from WSTK expression in the pistil-like stamens of alloplasmic wheat. The ectopic ovule is abnormal as it fails to form complete integuments. Based on the expression pattern of WSTK and B-sister MADS-box gene, WBsis (wheat B (sister) ), we conclude that WSTK plays a role in determination of ovule identity in the pistil-like stamen, but complete ovule development fails due to aberrant expression of WBsis.
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