NDLI: Panicle phytomer 1 mutations affect the panicle architecture of rice

Content Provider	Springer Nature Link
Author	Takahashi, M. Nagasawa, N. Kita, H. Nagato, Y.
Copyright Year	1998
Abstract	We have characterized three panicle phytomer 1 (pap1) mutations from the phytomer viewpoint. In pap1 mutants, rachis phytomers were strongly affected involving a severe reduction of rachis internode length and an increase in the number of rachis internodes (number of phytomers), resulting in a large number of primary branches. In addition, bracts were frequently over-developed. By contrast, pap1 differently affected primary branch phytomers resulting in a reduction in both the number and length of internodes. Spikelets were also modified. Rudimentary and empty glumes were frequently elongated. Floral organs were mostly normal. However, a double mutation between pap1 and fon1 markedly increased the number of floral organs compared with the single fon1 mutation, suggesting that PAP1 has a distinct role in the differentiation of floral organs. The functions of PAP1 on panicle architecture are: (1) the negative regulation of the number of phytomers on the rachis but a positive regulation of the number on primary branches, (2) an elongation of internodes, and (3) the negative regulation of bract development.
Starting Page	1050
Ending Page	1056
Page Count	7
File Format	PDF
ISSN	00405752
Journal	Theoretical and Applied Genetics
Volume Number	96
Issue Number	8
e-ISSN	14322242
Language	English
Publisher	Springer-Verlag
Publisher Date	1998-06-26
Publisher Place	Berlin/Heidelberg
Access Restriction	One Nation One Subscription (ONOS)
Content Type	Text
Resource Type	Article
Subject	Genetics Medicine Biotechnology Agronomy and Crop Science

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