J Integr Plant Biol. ›› 2008, Vol. 50 ›› Issue (3): 319-328.DOI: 10.1111/j.1744-7909.2007.00629.x

• Development & Photosynthesis • Previous Articles     Next Articles

Phenotypic Characterization, Genetic Analysis and Gene-mapping for a Brittle Mutant in Rice

Jian-Di Xu, Quan-Fang Zhang, Tao Zhang, Hong-Yu Zhang, Pei-Zhou Xu, Xu-Dong Wang and Xian-Jun Wu   

  • Received:2006-11-02 Accepted:2007-03-12

Abstract: Plant mechanical strength is an important agronomic trait of rice. An EMS-induced rice mutant, fragile plant 2 (fp2), showed morphological changes and reduced mechanical strength. Genetic analysis indicated that the brittle of fp2 was controlled by a recessive gene. The fp2 gene was mapped on chromosome 10. Anatomical analyses showed that the fp2 mutation caused the reduction of cell length and cell wall thickness, increasing of cell width, and the alteration of cell wall structure as well as the vessel elements. And the consequence was the global alteration in plant morphology. Chemical analyses indicated that the contents of cellulose and lignin decreased, hemicelluloses and silicon increased in fp2. These results were different from the other mutants reported in rice. Thus, fp2 might affect the deposition and patterning of microfibrils, the biosynthesis and deposition of cell wall components, which influences the formation of primary and secondary cell walls, the thickness of cell wall, cell elongation and expansion, plant morphology and plant strength in rice.

Key words: fragile plant (fp)2, phenotype, cell wall, gene mapping, rice (Oryza sativa L.)

Editorial Office, Journal of Integrative Plant Biology, Institute of Botany, CAS
No. 20 Nanxincun, Xiangshan, Beijing 100093, China
Tel: +86 10 6283 6133 Fax: +86 10 8259 2636 E-mail: jipb@ibcas.ac.cn
Copyright © 2022 by the Institute of Botany, the Chinese Academy of Sciences
Online ISSN: 1744-7909 Print ISSN: 1672-9072 CN: 11-5067/Q
备案号:京ICP备16067583号-22