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Abstract
The research on the color change of plant leaf is very important to clarify the structure and mechanism of photosynthetic system,such as chloroplast development and chlorophyll biosynthesis.A novel rice mutant mal(marginal albino leaf)with marginal albino leaf,was derived from the EMS-treated restorer line Jinhui 10.The mutant trait inherited steadily after several generations' self-crossing.The mal leaf displayed albino margin and narrow blade in the whole life.Compared with the wild type,mal decreased contents of photosynthetic pigments very significantly in the whole third leaf blade,margin parts of the second and third leaves at heading stage.The observation by that transmission electronic microscopy showed cells and chloroplasts in the green part of mal leaf developed normally,while in the albino part,the mesophyll cells were nearly hollow without obvious intact organelles and the chloroplast were fully degraded.Genetic analysis showed that the mutant trait was controlled by single recessive nuclear gene.MAL was finally mapped between SSR marker M22 and InDel marker ID27 with an interval of 171 kb on chromosome 8.These results provide a foundation for cloning and function analysis of MAL.
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