Effect of endosperm mutants on maize seed germination
نویسندگان
چکیده
منابع مشابه
Dependence of Seed Vigor during Germination on Carbohydrate Source in Endosperm Mutants of Maize.
Differences in seed vigor of four genotypes of maize (Zea mays L.), brittle-1 (bt1), shrunken-2 (sh2), sugary (su), and normal, in an isogenic background, were investigated. Excised whole embryos and axes were grown on Murashige and Skoog (MS) media containing various carbohydrate sources. Of the four genotypes examined, sh2 seeds had the lowest vigor, especially under germination stress condit...
متن کاملEndosperm Mutants of Maize
Sugar metabolism in kernels of starch-deficient endosperm mutants of maize (Zea mays L.) was examined to determine how single locus mutations of carbohydrate metabolism affect carbohydrate metabolism as a whole. Activities of 14 enyzmes were measured in extracts from endosperms from isogenic lines of normal, shrunken, shrunken-2, shrunken-4, brittle-1, and brittle-2 maize in an OH43 background....
متن کاملParent-of-Origin-Effect rough endosperm Mutants in Maize.
Parent-of-origin-effect loci have non-Mendelian inheritance in which phenotypes are determined by either the maternal or paternal allele alone. In angiosperms, parent-of-origin effects can be caused by loci required for gametophyte development or by imprinted genes needed for seed development. Few parent-of-origin-effect loci have been identified in maize (Zea mays) even though there are a larg...
متن کاملExcess boron reduces polyphenol oxidase activities in embryo and endosperm of maize seed during germination.
The effects of increasing concentrations of boron (0, 0.1, 1, 10 and 20 mM) as boric acid on the rate of germination and polyphenol oxidase activities in embryo and endosperm tissues of maize seeds (Zea mays L. cv. Arifiye) were studied. The germination percentage of maize seeds was not affected by boron concentrations up to 10 mM, and decreased by 20 mM. Distilled water and lower boron concent...
متن کاملThe modulating effect of the perisperm-endosperm envelope on ABA-inhibition of seed germination in cucumber.
Abscisic acid (ABA) markedly reduced the germination of developing seeds at much lower concentrations (ABA50=0.1 mM) compared with that of mature seeds (ABA50=1.6 mM) in cucumber (Cucumis sativus L. cv. Green long). The perisperm-endosperm (PE) envelope in developing seeds showed partly differentiated lipid and callose layers, considerable ABA biosynthetic activity in endosperm cells, and appre...
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ژورنال
عنوان ژورنال: ABI Genetika
سال: 2004
ISSN: 0534-0012,1820-6069
DOI: 10.2298/gensr0403265p