کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
2787490 1154316 2012 12 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Characterization and Fine Mapping of a Novel Rice Albino Mutant low temperature albino 1
موضوعات مرتبط
علوم زیستی و بیوفناوری بیوشیمی، ژنتیک و زیست شناسی مولکولی زیست شناسی تکاملی
پیش نمایش صفحه اول مقاله
Characterization and Fine Mapping of a Novel Rice Albino Mutant low temperature albino 1
چکیده انگلیسی

Albino mutants are useful genetic resource for studying chlorophyll biosynthesis and chloroplast development and cloning genes involved in these processes in plants. Here we report a novel rice mutant low temperature albino 1 (lta1) that showed albino leaves before 4-leaf stage when grown under temperature lower than 20°C, but developed normal green leaves under temperature higher than 24°C or similar morphological phenotypes in dark as did the wild-type (WT). Our analysis showed that the contents of chlorophylls and chlorophyll precursors were remarkably decreased in the lta1 mutant under low temperature compared to WT. Transmission electron microscope observation revealed that chloroplasts were defectively developed in the albino lta1 leaves, which lacked of well-stacked granum and contained less stroma lamellae. These results suggested that the lta1 mutation may delay the light-induced thylakoid assembly under low temperature. Genetic analysis indicated that the albino phenotype was controlled by a single recessive locus. Through map-based approach, we finally located the Lta1 gene to a region of 40.3 kb on the short arm of chromosome 11. There are 8 predicted open reading frames (ORFs) in this region and two of them were deleted in lta1 genome compared with the WT genome. The further characterization of the Lta1 gene would provide a good approach to uncover the novel molecular mechanisms involved in chloroplast development under low temperature stress.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of Genetics and Genomics - Volume 39, Issue 8, 20 August 2012, Pages 385–396
نویسندگان
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