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Investigating seed mineral composition in Korean landrace maize(Zea mays L.) and its kernel texture specificity

Journal of Integrative Agriculture 2019年第9期18卷 1996-2005页

作者： Sooyeon Lim gibum yi Department of Plant Science Plant Genomics and Breeding Institute/Research Institute of Agriculture and Life Sciences Seoul National University

Mineral malnutrition affects billions of people all over the world and biofortification of staple crops provides a potential way to alleviate dietary mineral *** example,nutritional quality is an important breeding target for fresh waxy maize(Zea mays L.),which is widely consumed in Asian *** improvement of mineral composition will require comprehensive profiling of the mineral composition of maize varieties and an understanding of the capacity for maize grains to accumulate ***,using inductively coupled plasma absorption emission spectrometry,we quantified 12 minerals from the seeds of 47 maize varieties,including 25 Korean *** also compared the mineral contents in varieties with different seed starch profiles:waxy maize(which contains 100%amylopectin),dent maize(roughly 75%amylopectin and 25%amylose),and flint maize(similar to dent maize).The amounts of potassium,phosphorus,and sulfur were correlated with seed texture,waxy maize having higher amounts of phosphorus and potassium than dent maize and lower amounts of sulfur than flint maize or dent *** addition,a positive relationship was detected between the amount of phosphorus and that of potassium,magnesium,and *** results provide information on maize seed mineral composition and indicate that it could be affected by starch ***,the landraces that exhibit high mineral contents could be used as germplasm materials for breeding programs aimed at producing biofortified maize cultivars.

关键词： micronutrient macronutrient biofortification maize aleurone endosperm

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A putative plant organelle RNA recognition protein gene is essential for maize kernel development

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Journal of Integrative Plant Biology 2015年第3期57卷 236-246页

作者： Antony M.Chettoor gibum yi Elisa Gomez Gregorio Hueros Robert B.Meeley Philip W.Becraft Department of Genetics Development and Cell BiologyIowa State University Carnegie Institution of Science Plant Genomics and Breeding Institute Seoul National University Department of Biotechnology and Biomedicine University of AlcalaUniversity Campus Du Pont Pioneer Department of Agronomy Iowa State University

Basal endosperm transfer layer（BETL） cells are responsible for transferring apoplastic solutes from the maternal pedicel into the endosperm,supplying the grain with compounds required for embryo development and storage reserve ***,we analyze the maize（Zea mays L.） empty pericarp6（emp6） mutant,which causes early arrest in grain *** Emp6 tgene function is required independently in both the embryo and *** emp6 mutant causes a notable effect on the differentiation of BETL cells;the extensive cell wall ingrowths that distinguish BETL cells are diminished and BETL marker gene expression is compromised in mutant *** tagging identified the emp6 locus as encoding a putative plant organelle RNA recognition（PORR） protein,1 of 15 PORR family members in *** emp6 transcript is widely detected in plant tissues with highest Researclevels in embryos and developing ***6-green fluorescent protein（GFP） fusion proteins transiently expressed in Nicotiana benthamiana leaves were targeted specifically to *** results suggest that BETL cell differentiation might be particularly energy intensive,or alternatively,that mitochondria might confer a developmental function.

关键词： Empty pericarp endosperm mitochondria RNA processing transfer cell

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